RFID Tags. By: Zeina Muallem

Size: px
Start display at page:

Download "RFID Tags. By: Zeina Muallem"

Transcription

1 RFID Tags By: Zeina Muallem

2 1-Bit Transponder 1-bit Transponder - has 2 states : 1 and 0 - Corresponds to: transponder in interrogation zone and no transponder in interrogation zone - Applied in EAS: electronic article surveillance (electronic anti-theft devices in shops) EAS system made up of: -antenna of reader (interrogator), security element (tag), optional deactivation device Main Performance Characteristic Recognition or detection rate (maximum distance between transponder and interrogator antenna)

3 RFID Systems

4 Radio Frequency RF procedure - LC circuits adjusted to Fr (resonant frequency) - Reader generates magnetic alternating (MAF) field in RF range - LC resonant circuit moved close to MAF If f of MAF corresponds with Fr of LC circuit (in the transponder) transponder oscillates sweep signal produces a dip in voltages at generator and sensor coils

5 EAS

6 Microwaves EAS systems in microwave range: - Generation of harmonics at components with nonlinear characteristic lines (diodes) - 1-bit transponder: a capacitance diode connected to base of dipole adjusted to carrier wave (frequencies 915 MHz, 2.45 GHz, 5.6 GHz) If transponder located within transmitter s range diode generates current re-emits harmonics of carrier signals at 2 or 3 times the carrier wave obtained e.g. second harmonic re-transmitted detected by receiver

7 Microwave Tag

8 Frequency Divider Frequency divider - Operates in kHz - Security tag (transponder): microchip-resonant circuit Resonant circuit resonates at operating frequency of EAS system Microchip - Receives power supply from MF of security device freq. of self-inductive coil divided by two by microchip sent back to security device signal fed back to resonant circuit

9 Frequency Divider (EAS)

10 Full and Half Duplex Half Duplex - Data transfer from transponder to reader alternates with data transfer from reader to transponder - Load modulation procedure: below 30 MHz-with or without sub-carrier Full Duplex - Data transfer from transponder to reader at same time with data transfer from reader to transponder - Data transmission from transponder at sub-harmonic or an-harmonic freq. of reader Transfer of energy from reader to transponder is continuous SEQ (sequential systems)

11 Full and Half Duplex

12 Inductive coupling Inductively coupled transponders - contains a single microchip and large area coil (antenna) - microchip operates passively energy supplied by reader - Reader antenna coil generates high freq. EF penetrates cross-section and area of coil voltage generated in transponder antenna coil by inductance voltage rectified serves as power supply to microchip - Antenna coil of transponder and capacitor form a resonant circuit Tuned to transmission freq. of reader Two coils form a transformer

13 Load Modulation Data transfer transponder reader - Transformer type coupling (primary coil: reader-secondary coil :transponder) - Transponder in near-field of reader If transponder placed close to MAF reader Transponder draws energy from the MF Load resistor switched on/off (transponder) change in reader voltage Amplitude Modulation data transfer when: timing where load resistor switched on/off is controlled by data

14 Load Modulation

15 With Sub-carrier Load modulation with sub-carrier - ISM freq. ranges: 6.78 MHz, 13.56MHz, MHz - voltage at antenna of reader (useful signal)<<output voltage of reader e.g. 100V 10mV useful signal Requires modulation sidebands created by AM: - Two modulation sidebands at the reader antenna - At a distance of the sub-carrier frequency around freq. Freader - Separated from stronger signal of reader by BP filtering on freader±fs amplified demodulation

16 Example Circuit Load modulation with sub-carrier - Operating freq MHz generates sub-carrier of 212kHz - voltage induced at coil L1 by MAF (reader) is rectified using bridge rectifier (D1-D4) - C1 does smoothing available as supply voltage - regulator (ZD 5V6) regulates the supply voltage prevents uncontrolled increase - high freq. antenna volt. (13.56MHz) travels to CLK via R1 internal clocking signal for transponder - Division by 64 a sub-carrier of 212kHz at Q7 controlled by DATA passed to switch T1 load resistor R2 switched on/off with subcarrier freq.

17 With Subcarrier

18 EM backscatter coupling Power supply to transponder -Long range systems: distance between reader-transponder >1m - operates at UHF frequencies 868MHz (Europe), 915MHz (USA), 2.5GHz- 5.8GHz antennas with smaller dimensions Backscatter transponders - long ranges up to 15m - greater power consumption - have a backup battery to supply power to transponder chip - transponder out of range of reader has a power saving power down - stand-by mode - battery supplies power for microchip only Data transmission: power of EMF emitted by reader

19 Close Coupling Power supply to transponder - for ranges of 0.1cm-1cm transponder inserted or placed into the reader Functional Layout - Transformer : reader represents primary winding and transponder coil secondary winding - high freq. alternating current generates high freq. magnetic field in transponder coil power rectified provides power supply to the chip - frequencies in range 1-10 MHz

20 Close Coupling

21 Close Coupling Data transfer transponder reader Magnetic coupling - load modulation with sub-carrier used - used in close coupling chip cards Capacitive coupling - plate capacitors arranged in transponder and reader // when transponder inserted in reader - used in close coupling smart cards

22 Capacitive Coupling

23 Electrical coupling Power supply of passive transponders - reader antenna made of electrode generates a high freq. electrical field - transponder made of 2 conductive surfaces - transponder placed within EF of reader electric voltage between 2 electrodes supply power to transponder chips

24 E.C. System

25 Electrical coupling Data transfer reader transponder Three basic procedures: - ASK (most preferable due to simplicity in demodulation) -FSK - PSK

26 Sequential procedures SEQ: transmission of data and power from reader data carrier alternates with data transfer from transponder reader Comparison between SEQ and HDX/FDX - full source voltage of transponder coil is up to twice that of a HDX/FDX system - energy available to the chip is determined only by capacitance of charging capacitor and the charging period in SEQ - In HDX/FDX max power consumption fixed by coil geometry and field strength H

27 FDX/HDX and SEQ

28 Physical principles of RFID systems Electromagnetic Fields - used in RFID systems - operate at above 30MHz Magnetic Field - conductor antennas generate MAF in the read/write devices of inductively coupled RFID systems - might be too low or high depending on radius of antenna transmitter (reader): If R very big H very low In Figure below: Inductively coupled RFID system - L1 transmitter antenna of reader - L2 antenna of transponder-r2 coil resistance - RL current consumption of data memory

29 Physical principles of RFID systems H min (interrogation field strength of transponder) - is the minimum field strength (max distance between transponder and reader) - u2 is the high supply voltage for operation of data carrier - RL input resistance of data carrier - After rectification data carrier requires 3-5V constant voltage Resonant circuit - C2 in // with transponder coil L2 - Resonant frequency : f=1/2π L2 C2 - resonant freq. (transponder) matched to transmission freq. (reader)

30 Operating Principle

31 Frequency Ranges RFID Systems - Frequency Ranges: 0-135kHz, ISM frequencies 6.78MHz-13.56MHz MHz-40.68MHz MHz- 869MHz-915MHz-2.45GHz-5.8GHz GHz

32 Frequency Ranges Frequency range 9-135kHz - also used by other radio services Frequency range 6.78MHz - short wave frequencies - permit short ranges up to few 100km in daytime Frequency range 13.56MHz - permits transcontinental connections Frequency range MHz - 27MHz RFID systems for industrial applications (like hospitals) Frequency range MHz - No RFID systems operating in this range Frequency range MHz - applied in Backscatter (RFID) systems

33 Frequency Ranges Frequency range 915MHz - Backscatter (RFID) systems Frequency range 2.45GHz - Backscatter systems Frequency range 5.8GHz - backscatter systems Frequency range GHz - no RFID systems operating

34 Frequency Ranges <135kHz - large ranges - low cost transponders - high power to transponder - transponder has low power consumption 6.78MHz - low cost transponders - medium speed transponders 13.56MHz - high speed/high end applications - medium speed/low end applications MHz - low ranges - large bandwidth very fast data transmission

Fundamental Operating Principles

Fundamental Operating Principles 3 Fundamental Operating Principles This chapter describes the basic interaction between transponder and reader, in particular the power supply to the transponder and the data transfer between transponder

More information

Tutorial overview of inductively coupled RFID Systems

Tutorial overview of inductively coupled RFID Systems Tutorial overview of inductively coupled RFID Systems Introduction There are two main categories for RFID systems on the market today. These are near field systems that employ inductive coupling of the

More information

Radio Frequency Identification. Done by: Haitham Habli.

Radio Frequency Identification. Done by: Haitham Habli. Radio Frequency Identification Done by: Haitham Habli. Table of contents Definition of RFID. Do they need license? RFID vs other identification systems. Classification of RFID systems. Emerge of passive

More information

Design and Optimization of Remotely powered RFID Systems and Sensor Nodes

Design and Optimization of Remotely powered RFID Systems and Sensor Nodes Design and Optimization of Remotely powered RFID Systems and Sensor Nodes 1 Introduction to RFID 2 Dr. Wireless Catherine Power Dehollain Transmission 3 Communication Issue Ecole Polytechnique Fédérale

More information

Low Frequency Reader and Antenna Design Using RFID

Low Frequency Reader and Antenna Design Using RFID Universal Journal of Electrical and Electronic Engineering 3(1): 1-5, 2015 DOI: 10.13189/ujeee.2015.030101 http://www.hrpub.org Low Frequency Reader and Antenna Design Using RFID Waqas Malik Department

More information

Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT)

Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) COMPATIBILITY BETWEEN INDUCTIVE LF AND HF RFID TRANSPONDER AND OTHER RADIO

More information

a leap ahead in analog

a leap ahead in analog EMV Contactless Payment Systems based on AS3911 Overview and System Simulations Giuliano Manzi, PhD Mannheim, May 23 25, 2012 CST EUROPEAN USER CONFERENCE 2012 a leap ahead in analog OUTLINE AS3911 OVERVIEW

More information

Glossary of RTLS/RFID Terms

Glossary of RTLS/RFID Terms Glossary of RTLS/RFID Terms A Active tag: An RFID tag that has a transmitter to send back information, rather than reflecting back a signal from the reader, as a passive tag does. Most active tags use

More information

CHAPTER 2 RFID TECHNOLOGY AND ITS APPLICATIONS TO HUMAN TRACKING

CHAPTER 2 RFID TECHNOLOGY AND ITS APPLICATIONS TO HUMAN TRACKING 18 CHAPTER 2 RFID TECHNOLOGY AND ITS APPLICATIONS TO HUMAN TRACKING In this chapter, we briefly review some of the basic technical details pertaining to RFID Technology, its advantages and shortcomings

More information

Introduction to RFID Technology

Introduction to RFID Technology Introduction to RFID Technology 1 Definition RFID (Radio Frequency Identification) is a technology that enables the electronic and wireless labeling and identification of objects, humans and animals Radar

More information

Microwave Measurements with Network Analyzer Design of RFID Antenna. In the Course Circuit Theory By: Johan Sidén

Microwave Measurements with Network Analyzer Design of RFID Antenna. In the Course Circuit Theory By: Johan Sidén Microwave Measurements with Network Analyzer Design of RFID Antenna In the Course Circuit Theory By: By: 1(9) In this laboratory work you will show your classmates that you can get the best resonance on

More information

RFID BASED VEHICLE TRACKING SYSTEM

RFID BASED VEHICLE TRACKING SYSTEM RFID BASED VEHICLE TRACKING SYSTEM Operating a managed, busy parking lot can pose significant challenges, especially to a government organization that also owns some of the vehicles in the lot. The parking

More information

RECOMMENDATION ITU-R M.1453-1 * Transport information and control systems Dedicated short range communications at 5.8 GHz

RECOMMENDATION ITU-R M.1453-1 * Transport information and control systems Dedicated short range communications at 5.8 GHz Rec. ITU-R M.1453-1 1 RECOMMENDATION ITU-R M.1453-1 * Transport and control systems Dedicated short range communications at 5.8 GHz (Question ITU-R 205/8) (2000-2002) The ITU Radiocommunication Assembly,

More information

Radio Frequency Identification (RFID) Presenter: Dusan Stevanovic April 3, 2007

Radio Frequency Identification (RFID) Presenter: Dusan Stevanovic April 3, 2007 Radio Frequency Identification (RFID) Presenter: Dusan Stevanovic April 3, 2007 Introduction RFID are systems that transmit identity (in the form of a unique serial number) of an object or person wirelessly,

More information

Engineering Sciences 151. Electromagnetic Communication Laboratory Assignment 3 Fall Term 1998-99

Engineering Sciences 151. Electromagnetic Communication Laboratory Assignment 3 Fall Term 1998-99 Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 3 Fall Term 1998-99 WAVE PROPAGATION II: HIGH FREQUENCY SLOTTED LINE AND REFLECTOMETER MEASUREMENTS OBJECTIVES: To build greater

More information

Diode Applications. by Kenneth A. Kuhn Sept. 1, 2008. This note illustrates some common applications of diodes.

Diode Applications. by Kenneth A. Kuhn Sept. 1, 2008. This note illustrates some common applications of diodes. by Kenneth A. Kuhn Sept. 1, 2008 This note illustrates some common applications of diodes. Power supply applications A common application for diodes is converting AC to DC. Although half-wave rectification

More information

Team 8 Michael Price Brandon Briegel Jerrod Kempf Matt Henry Arber Nicaj. RF Communication

Team 8 Michael Price Brandon Briegel Jerrod Kempf Matt Henry Arber Nicaj. RF Communication Team 8 Michael Price Brandon Briegel Jerrod Kempf Matt Henry Arber Nicaj RF Communication Discussion Topics Electromagnetic Spectrum Hardware Modulation/Demodulation Noise Bluetooth Introduction What is

More information

Design and development of a RFID reader with carrier frequency of 125 KHz

Design and development of a RFID reader with carrier frequency of 125 KHz Design and development of a RFID reader with carrier frequency of 125 KHz Lucian - Nicolae Cojocariu, Octavian - Modest Manu Ștefan cel Mare University Suceava, Romania luccojocariu@stud.usv.ro, octavianm@eed.usv.ro

More information

AM TRANSMITTERS & RECEIVERS

AM TRANSMITTERS & RECEIVERS Reading 30 Ron Bertrand VK2DQ http://www.radioelectronicschool.com AM TRANSMITTERS & RECEIVERS Revision: our definition of amplitude modulation. Amplitude modulation is when the modulating audio is combined

More information

Complete Technology and RFID

Complete Technology and RFID UGM 2007 Complete Technology and RFID Overview Operating Principles Inductive Coupling Microwave Coupling Coupling to Circuit Simmulation Summary T. Wittig 1 twi, apr / v2.0 / 12. Jun 2007 Overview Radio

More information

Using RFID Techniques for a Universal Identification Device

Using RFID Techniques for a Universal Identification Device Using RFID Techniques for a Universal Identification Device Roman Zharinov, Ulia Trifonova, Alexey Gorin Saint-Petersburg State University of Aerospace Instrumentation Saint-Petersburg, Russia {roman,

More information

Germanium Diode AM Radio

Germanium Diode AM Radio Germanium Diode AM Radio LAB 3 3.1 Introduction In this laboratory exercise you will build a germanium diode based AM (Medium Wave) radio. Earliest radios used simple diode detector circuits. The diodes

More information

2.45 GHz Power and Data Transmission for a Low-Power Autonomous Sensors Platform

2.45 GHz Power and Data Transmission for a Low-Power Autonomous Sensors Platform 9.4.45 GHz Power and Data Transmission for a Low-Power Autonomous Sensors Platform Stefano Gregori 1, Yunlei Li 1, Huijuan Li 1, Jin Liu 1, Franco Maloberti 1, 1 Department of Electrical Engineering, University

More information

SMART RFID-LABEL FOR MONITORING THE PRESERVATION CONDITIONS OF FOOD

SMART RFID-LABEL FOR MONITORING THE PRESERVATION CONDITIONS OF FOOD SMART RFID-LABEL FOR MONITORING THE PRESERVATION CONDITIONS OF FOOD D. CARTASEGNA, A. CITO, F. CONSO, A. DONIDA, M. GRASSI, L. MALVASI, G. RESCIO AND P. MALCOVATI Department of Electrical Engineering,

More information

Single Transistor FM Transmitter Design

Single Transistor FM Transmitter Design Single Transistor FM Transmitter Design In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency. FM is commonly used at VHF radio frequencies for

More information

AppNote 404 EM MICROELECTRONIC - MARIN SA. EM4095 Application Note RFID. Title: Product Family: TABLE OF CONTENT. Application Note 404

AppNote 404 EM MICROELECTRONIC - MARIN SA. EM4095 Application Note RFID. Title: Product Family: TABLE OF CONTENT. Application Note 404 EM MICROELECTRONIC - MARIN SA AppNote 0 Title: Product Family: Application Note 0 EM095 Application Note RFID Part Number: EM095 Keywords: RFID Transceiver, Reader Chip, EM095 Date: 5 September 00 TABLE

More information

Practice Problems - Chapter 33 Alternating Current Circuits

Practice Problems - Chapter 33 Alternating Current Circuits Multiple Choice Practice Problems - Chapter 33 Alternating Current Circuits 4. A high-voltage powerline operates at 500 000 V-rms and carries an rms current of 500 A. If the resistance of the cable is

More information

EM4095 EM MICROELECTRONIC - MARIN SA. Read/Write analog front end for 125kHz RFID Basestation SO16

EM4095 EM MICROELECTRONIC - MARIN SA. Read/Write analog front end for 125kHz RFID Basestation SO16 EM MICROELECTRONIC - MARIN SA EM0 Read/Write analog front end for khz RFID Basestation Description The EM0 (previously named P0) chip is a CMOS integrated transceiver circuit intended for use in an RFID

More information

INTEGRATED CIRCUITS I CODE SLI. Smart Label IC SL2 ICS20. Functional Specification. Product Specification Revision 3.1 Public. Philips Semiconductors

INTEGRATED CIRCUITS I CODE SLI. Smart Label IC SL2 ICS20. Functional Specification. Product Specification Revision 3.1 Public. Philips Semiconductors INTEGRATED CIRCUITS I CODE SLI Smart Label IC SL2 ICS20 Product Specification Revision 3.1 February July 2005 2001 Public Philips Semiconductors CONTENTS 1 FEATURES...4 1.1 I CODE SLI RF Interface (ISO/IEC

More information

RFID Receiver Antenna Project for 13.56 Mhz Band

RFID Receiver Antenna Project for 13.56 Mhz Band RFID Receiver Antenna Project for 13.56 Mhz Band Fatih Eken TE 401 Microwave Course Term Project, Fall 2004 Supervised by Asst. Prof. İbrahim Tekin Telecommunication Program in Faculty of Engineering and

More information

RFID Reader RS-232. User Manual. Document : Datasheet Model # : RFID - 1321 Date : 25-Feb-10

RFID Reader RS-232. User Manual.  Document : Datasheet Model # : RFID - 1321 Date : 25-Feb-10 Document : Datasheet Model # : RFID - 1321 Date : 25-Feb-10 RFID Reader RS-232 User Manual Rhydo Technologies (P) Ltd. (An ISO 9001:2008 Certified R&D Company) Golden Plaza, Chitoor Road, Cochin 682018,

More information

1. INTRODUCTION. There are different frequency bans according to the range of frequencies shown: 1.1 Electromagnetic Spectrum

1. INTRODUCTION. There are different frequency bans according to the range of frequencies shown: 1.1 Electromagnetic Spectrum International Journal of Scientific & Engineering Research Volume 4, Issue3, March-2013 1 Wireless Charging of Mobile Phone using Microwaves! Apurva Patel 3 rd Year B.Tech Computer Science Student VIT

More information

AN2866 Application note

AN2866 Application note Application note How to design a 13.56 MHz customized tag antenna Introduction RFID (radio-frequency identification) tags extract all of their power from the reader s field. The tags and reader s antennas

More information

APPLICATION NOTE - 016

APPLICATION NOTE - 016 APPLICATION NOTE - 016 Testing RFI Line Filters Frequency Response Analysis Testing RFI line filters Radio frequency interference (RFI) is unwanted electromagnetic noise within a radio communications frequency

More information

How the Future Looks for UHF RFID!

How the Future Looks for UHF RFID! How the Future Looks for UHF RFID! Khaled ElMahgoub ThingMagic, A Division of Trimble Navigation Auto-ID Labs, Massachusetts Institute of Technology IEEE RFID Conference, April 08-10, 2104 Outlines Introduction

More information

Radio Frequency Identification (RFID)

Radio Frequency Identification (RFID) Radio Frequency Identification (RFID) Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-06/

More information

Changes PN532_Breakout board

Changes PN532_Breakout board Changes PN532_Breakout board Document: Changes PN532_Breakout board Department / Faculty : TechnoCentrum - Radboud University Nijmegen Contact: René Habraken Date: 17 May 2011 Doc. Version: 1.0 Contents

More information

CHARACTERIZATION OF AN RFID READER.

CHARACTERIZATION OF AN RFID READER. CHARACTERIZATION OF AN RFID READER. Miguel De La Cruz, Helen Gutiérrez, Alfredo Saavedra {miguel_delacruz_solis, helentwo4, alfsaanau} @hotmail.com University Ricardo Palma Lima, Perú Asesor Mario Chauca,

More information

Study Guide for the Electronics Technician Pre-Employment Examination

Study Guide for the Electronics Technician Pre-Employment Examination Bay Area Rapid Transit District Study Guide for the Electronics Technician Pre-Employment Examination INTRODUCTION The Bay Area Rapid Transit (BART) District makes extensive use of electronics technology

More information

What is RFID? Lisa Petrini

What is RFID? Lisa Petrini What is RFID? Lisa Petrini A Tool Real-time Information Monitor Assets Remove Human Interaction Serialize Data What is in it for my organization? Reduced Costs Improved Quality Improved Customer Satisfaction

More information

Application Note SAW-Components

Application Note SAW-Components Application Note SAW-Components Principles of SAWR-stabilized oscillators and transmitters. App: Note #1 This application note describes the physical principle of SAW-stabilized oscillator. Oscillator

More information

READER COMPONENTS. mifare (14443A) 13.56 MHz RFID Proximity Antennas. November 2002. Revision 1.0 PUBLIC. Philips Semiconductors

READER COMPONENTS. mifare (14443A) 13.56 MHz RFID Proximity Antennas. November 2002. Revision 1.0 PUBLIC. Philips Semiconductors READER COMPONENTS mifare (14443A) 13.56 MHz RFID Proximity Antennas Revision 1.0 PUBLIC November 00 Philips Semiconductors Philips Semiconductors Rev. 1.0 November 00 CONTENTS 1 INTRODUCTION... 3 1.1 Purpose

More information

Design And Implementation Of Bank Locker Security System Based On Fingerprint Sensing Circuit And RFID Reader

Design And Implementation Of Bank Locker Security System Based On Fingerprint Sensing Circuit And RFID Reader Design And Implementation Of Bank Locker Security System Based On Sensing Circuit And RFID Reader Khaing Mar Htwe, Zaw Min Min Htun, Hla Myo Tun Abstract: The main goal of this system is to design a locker

More information

DT3: RF On/Off Remote Control Technology. Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch

DT3: RF On/Off Remote Control Technology. Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch DT3: RF On/Off Remote Control Technology Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch Agenda Radio Frequency Overview Frequency Selection Signals Methods Modulation Methods

More information

Tire pressure monitoring

Tire pressure monitoring Application Note AN601 Tire pressure monitoring 1 Purpose This document is intended to give hints on how to use the Intersema pressure sensors in a low cost tire pressure monitoring system (TPMS). 2 Introduction

More information

IFI5481: RF Circuits, Theory and Design

IFI5481: RF Circuits, Theory and Design IFI5481: RF Circuits, Theory and Design Lecturer: Prof. Tor A. Fjeldly, UiO og NTNU/UNIK [torfj@unik.no] Assistant: Malihe Zarre Dooghabadi [malihezd@ifi.uio.no] Syllabus: Lectured material and examples,

More information

Impedance Matching and Matching Networks. Valentin Todorow, December, 2009

Impedance Matching and Matching Networks. Valentin Todorow, December, 2009 Impedance Matching and Matching Networks Valentin Todorow, December, 2009 RF for Plasma Processing - Definition of RF What is RF? The IEEE Standard Dictionary of Electrical and Electronics Terms defines

More information

WHITEPAPER RFID and wireless power transfer simulation from tag to system

WHITEPAPER RFID and wireless power transfer simulation from tag to system WHITEPAPER RFID and wireless power transfer simulation from tag to system This article discusses the design and modeling of both low frequency (LF) and high frequency (HF) RFID devices using CST STUDIO

More information

Design Considerations for RF Energy Harvesting Devices

Design Considerations for RF Energy Harvesting Devices Design Considerations for RF Energy Harvesting Devices Harry Ostaffe Director, Marketing & Business Development 1 Overview RF energy is generally very low Direct-power at close range to a transmitter Energy

More information

Meeting TeTech. Version: 1.8, 15-July-2013, Author: Wim Telkamp, language: English

Meeting TeTech. Version: 1.8, 15-July-2013, Author: Wim Telkamp, language: English Meeting TeTech, English version TeTech M.H. Trompstraat 6 3601 HT Maarssen The Netherlands Tel: + 31 (0) 346 284004 Fax: + 31 (0) 346 283691 Email: info@tetech.nl Web: www.tetech.nl CoC: 30169033 VAT:

More information

WIRELESS MAGNETIC CONTACT

WIRELESS MAGNETIC CONTACT WIRELESS MAGNETIC CONTACT The magnetic contact wireless MAG HCS is a sensor able to detect opening or closing doors or windows and transmits via radio a alarm signal. It is composed of two distinct elements:

More information

Understanding SMD Power Inductors. Application Note. July 2011

Understanding SMD Power Inductors. Application Note. July 2011 Understanding SMD Power Inductors July 2011 Application Note Power inductors play an important role in voltage conversion applications by yielding lower core losses. They are also used to store energy,

More information

Passive RFID sensors. Passive RFID sensor project RF MEMS group, Li-Bachman labs. Michael Helmeste

Passive RFID sensors. Passive RFID sensor project RF MEMS group, Li-Bachman labs. Michael Helmeste Passive RFID sensors Passive RFID sensor project RF MEMS group, Li-Bachman labs Michael Helmeste Passive RFID basics A short explanation of passive RFID What is RFID? Radio Frequency IDentification A very

More information

Components of the RFID System

Components of the RFID System 5 Components of the RFID System 5.1 Engineering Challenges An RFID system consists of an RFID reader, RFID tag, and information managing host computer. The reader contains an RF transceiver module (transmitter

More information

Part 2: Receiver and Demodulator

Part 2: Receiver and Demodulator University of Pennsylvania Department of Electrical and Systems Engineering ESE06: Electrical Circuits and Systems II Lab Amplitude Modulated Radio Frequency Transmission System Mini-Project Part : Receiver

More information

ASSET TRACKING USING RFID SRAVANI.P(07241A12A7) DEEPTHI.B(07241A1262) SRUTHI.B(07241A12A3)

ASSET TRACKING USING RFID SRAVANI.P(07241A12A7) DEEPTHI.B(07241A1262) SRUTHI.B(07241A12A3) ASSET TRACKING USING RFID BY SRAVANI.P(07241A12A7) DEEPTHI.B(07241A1262) SRUTHI.B(07241A12A3) OBJECTIVE Our main objective is to acquire an asset tracking system. This keeps track of all the assets you

More information

RFID Tags. Prasanna Kulkarni Motorola. ILT Workshop Smart Labels USA February 21, 2008

RFID Tags. Prasanna Kulkarni Motorola. ILT Workshop Smart Labels USA February 21, 2008 RFID Tags Prasanna Kulkarni Motorola ILT Workshop Smart Labels USA February 21, 2008 Agenda RFID tags Brief overview Roadmap of key attribute needs Existing tag technologies Emerging tag technologies Critical

More information

Electromagnetic (EM) waves. Electric and Magnetic Fields. L 30 Electricity and Magnetism [7] James Clerk Maxwell (1831-1879)

Electromagnetic (EM) waves. Electric and Magnetic Fields. L 30 Electricity and Magnetism [7] James Clerk Maxwell (1831-1879) L 30 Electricity and Magnetism [7] ELECTROMAGNETIC WAVES Faraday laid the groundwork with his discovery of electromagnetic induction Maxwell added the last piece of the puzzle Heinrich Hertz made the experimental

More information

RF Network Analyzer Basics

RF Network Analyzer Basics RF Network Analyzer Basics A tutorial, information and overview about the basics of the RF Network Analyzer. What is a Network Analyzer and how to use them, to include the Scalar Network Analyzer (SNA),

More information

The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam

The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam This document contains every question from the Extra Class (Element 4) Question Pool* that requires one or more mathematical

More information

REPORT ON CANDIDATES WORK IN THE CARIBBEAN ADVANCED PROFICIENCY EXAMINATION MAY/JUNE 2008 ELECTRICAL AND ELECTRONIC TECHNOLOGY (TRINIDAD AND TOBAGO)

REPORT ON CANDIDATES WORK IN THE CARIBBEAN ADVANCED PROFICIENCY EXAMINATION MAY/JUNE 2008 ELECTRICAL AND ELECTRONIC TECHNOLOGY (TRINIDAD AND TOBAGO) CARIBBEAN EXAMINATIONS COUNCIL REPORT ON CANDIDATES WORK IN THE CARIBBEAN ADVANCED PROFICIENCY EXAMINATION MAY/JUNE 2008 ELECTRICAL AND ELECTRONIC TECHNOLOGY (TRINIDAD AND TOBAGO) Copyright 2008 Caribbean

More information

RFID Basics HEGRO Belgium nv - Assesteenweg 25-29 - 1740 Ternat Tel.: +32 (0)2/582.31.97 Fax : +32 (0)2/582.11.24 email : info@hegrobelgium.

RFID Basics HEGRO Belgium nv - Assesteenweg 25-29 - 1740 Ternat Tel.: +32 (0)2/582.31.97 Fax : +32 (0)2/582.11.24 email : info@hegrobelgium. RFID Basics RFID Basics Introduction Radio Frequency Identification (RFID) technology has been attracting considerable attention with the expectation of improved supply chain visibility for both suppliers

More information

1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole.

1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. Exam Name 1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. 2) Which of the following statements is correct? A) Earth's north pole is magnetic north. B) The north

More information

Features. Applications. Transmitter. Receiver. General Description MINIATURE MODULE. QM MODULATION OPTIMAL RANGE 1000m

Features. Applications. Transmitter. Receiver. General Description MINIATURE MODULE. QM MODULATION OPTIMAL RANGE 1000m Features MINIATURE MODULE QM MODULATION OPTIMAL RANGE 1000m 433.05 434.79 ISM BAND 34 CHANNELS AVAILABLE SINGLE SUPPLY VOLTAGE Applications IN VEHICLE TELEMETRY SYSTEMS WIRELESS NETWORKING DOMESTIC AND

More information

Tag Tuning/RFID. Application Note. Tag Tuning. Introduction. Antenna Equivalent Circuit

Tag Tuning/RFID. Application Note. Tag Tuning. Introduction. Antenna Equivalent Circuit Tag Tuning Introduction RFID tags extract all of their power to both operate and communicate from the reader s magnetic field. Coupling between the tag and reader is via the mutual inductance of the two

More information

CHAPTER 1 Introduction 1

CHAPTER 1 Introduction 1 Contents CHAPTER 1 Introduction 1 CHAPTER 2 Short-Range Communications Systems 3 2.1 Radio-Frequency Spectrum and Propagation 3 2.1.1 Theory of Electromagnetism and Maxwell s Equations 3 2.1.2 RF Propagation

More information

Asסס they cross a check point by detecting tags or label that resonate with: -- Radio Frequency field in RF systems

Asסס they cross a check point by detecting tags or label that resonate with: -- Radio Frequency field in RF systems ELECTRONIC ARTICLE SURVEILLANCE Overview EAS: Shrinkage accounts for any loss of inventory due to shoplifting, employee theft, administrative error or vendor fraud. Sources of retail shrinkage are: shoplifting

More information

Eðlisfræði 2, vor 2007

Eðlisfræði 2, vor 2007 [ Assignment View ] [ Print ] Eðlisfræði 2, vor 2007 30. Inductance Assignment is due at 2:00am on Wednesday, March 14, 2007 Credit for problems submitted late will decrease to 0% after the deadline has

More information

Homework #11 203-1-1721 Physics 2 for Students of Mechanical Engineering

Homework #11 203-1-1721 Physics 2 for Students of Mechanical Engineering Homework #11 203-1-1721 Physics 2 for Students of Mechanical Engineering 2. A circular coil has a 10.3 cm radius and consists of 34 closely wound turns of wire. An externally produced magnetic field of

More information

RFID Penetration Tests when the truth is stranger than fiction

RFID Penetration Tests when the truth is stranger than fiction RFID Penetration Tests when the truth is stranger than fiction Dr. Tomáš Rosa, tomas.rosa@rb.cz Raiffeisenbank, a.s. Agenda Technology overview Physical layer of LF and HF bands The Unique ID phenomenon

More information

INTEGRATED CIRCUITS DATA SHEET. TDA8340 TDA8341 Television IF amplifier and demodulator. Product specification File under Integrated Circuits, IC02

INTEGRATED CIRCUITS DATA SHEET. TDA8340 TDA8341 Television IF amplifier and demodulator. Product specification File under Integrated Circuits, IC02 INTEGRATED CIRCUITS DATA SHEET Television IF amplifier and demodulator File under Integrated Circuits, IC02 November 1987 DESCRIPTION The ;Q and ;Q are integrated IF amplifier and demodulator circuits

More information

Lecture 24. Inductance and Switching Power Supplies (how your solar charger voltage converter works)

Lecture 24. Inductance and Switching Power Supplies (how your solar charger voltage converter works) Lecture 24 Inductance and Switching Power Supplies (how your solar charger voltage converter works) Copyright 2014 by Mark Horowitz 1 Roadmap: How Does This Work? 2 Processor Board 3 More Detailed Roadmap

More information

TOTALLY SOLID STATE NON-DIRECTIONAL RADIO BEACONS 190-535 khz

TOTALLY SOLID STATE NON-DIRECTIONAL RADIO BEACONS 190-535 khz TOTALLY SOLID STATE NON-DIRECTIONAL RADIO S 190-535 khz This family of radio transmitters has been developed as extremely efficient, highly reliable Non Directional Beacons. ND2000A/4000A» MODULAR CONSTRUCTION»

More information

Redes y Servicios de Radio. RFID Systems

Redes y Servicios de Radio. RFID Systems Redes y Servicios de Radio RFID Systems Alumno 1: Dietl Marcus Alumno 2: Maier Karl Fecha de la presentación: 19.05.2010 1. Introduction The term RFID refers to the use of an object ( tag ) on a product,

More information

REMOTE KEYLESS ENTRY SYSTEM RECEIVER DESIGN

REMOTE KEYLESS ENTRY SYSTEM RECEIVER DESIGN INTRODUCTION: REMOTE KEYLESS ENTRY SYSTEM RECEIVER DESIGN Remote keyless entry (RKE) has captivated automobile buyers, as evidenced by the popularity of RKE on new automobiles and as an aftermarket item.

More information

INTEGRATED CIRCUITS DATA SHEET. TDA7000 FM radio circuit. Product specification File under Integrated Circuits, IC01

INTEGRATED CIRCUITS DATA SHEET. TDA7000 FM radio circuit. Product specification File under Integrated Circuits, IC01 INTEGRATED CIRCUITS DATA SHEET File under Integrated Circuits, IC01 May 1992 GENERAL DESCRIPTION The is a monolithic integrated circuit for mono FM portable radios, where a minimum on peripheral components

More information

RF Energy Harvesting from Cell Phone in GSM900 Band

RF Energy Harvesting from Cell Phone in GSM900 Band RF Energy Harvesting from Cell Phone in GSM900 Band B.Hridayeta 1, P.K.Singhal 2 1, 2 Department of Electronics, Madhav Institute of Technology and Science, Gwalior-474005 ---------------------------------------------------------------------***---------------------------------------------------------------------

More information

VJ 6040 Mobile Digital TV UHF Antenna Evaluation Board

VJ 6040 Mobile Digital TV UHF Antenna Evaluation Board VISHAY VITRAMON Multilayer Chip Capacitors Application Note GENERAL is a multilayer ceramic chip antenna designed for receiving mobile digital TV transmissions in the UHF band. The target application for

More information

RF POWER AMPLIFIERS - TANK CIRCUITS & OUTPUT COUPLING

RF POWER AMPLIFIERS - TANK CIRCUITS & OUTPUT COUPLING 1 of 6 RF POWER AMPLIFIERS - TANK CIRCUITS & OUTPUT COUPLING by Lloyd Butler VK5BR The output tuning and coupling of the final RF amplifier is an important part of the transmitter. It is designed to load

More information

FEATURES DESCRIPTION APPLICATIONS BLOCK DIAGRAM. PT2248 Infrared Remote Control Transmitter

FEATURES DESCRIPTION APPLICATIONS BLOCK DIAGRAM. PT2248 Infrared Remote Control Transmitter Infrared Remote Control Transmitter DESCRIPTION PT2248 is an infrared remote control transmitter utilizing CMOS Technology. It is capable of 18 functions and a total of 75 commands. Single-shot and continuous

More information

Curriculum and Concept Module Development in RF Engineering

Curriculum and Concept Module Development in RF Engineering Introduction Curriculum and Concept Module Development in RF Engineering The increasing number of applications students see that require wireless and other tetherless network solutions has resulted in

More information

Using ISO 15693 Compliant RFID Tags in an Inventory Control System

Using ISO 15693 Compliant RFID Tags in an Inventory Control System Using ISO 15693 Compliant RFID Tags in an Inventory Control System University: Louisiana State University, Baton Rouge, Louisiana Course: Undergraduate Capstone Project Student Team Members: Joseph Gates,

More information

Operation Guide Version 1.0 (July 2000)

Operation Guide Version 1.0 (July 2000) CDP-TX-04S UHF FM-NARROW BAND RADIO DATA MODULE Operation Guide Version 1.0 (July 2000) CIRCUIT DESIGN, INC., International Business Division 7557-1 Hotaka, Hotaka-machi, Minamiazumi, Nagano 399-8303.

More information

RFID Liquid Measurement

RFID Liquid Measurement RFID Liquid Measurement Application Note George Ballios 11/14/2008 Abstract The design of a RFID (Radio Frequency Identification) transmitting system that will have to penetrate a medium to measure a liquid,

More information

RF Communication System. EE 172 Systems Group Presentation

RF Communication System. EE 172 Systems Group Presentation RF Communication System EE 172 Systems Group Presentation RF System Outline Transmitter Components Receiver Components Noise Figure Link Budget Test Equipment System Success Design Remedy Transmitter Components

More information

K.Srinivasu Ravi 1, Seema Kalangi 2, Veeraiah Maddu 3

K.Srinivasu Ravi 1, Seema Kalangi 2, Veeraiah Maddu 3 REPLACING E- PASSPORT USING BIO-CHIP WITH UNIQUE IDENTIFICATION (ADHAAR ID) K.Srinivasu Ravi 1, Seema Kalangi 2, Veeraiah Maddu 3 1 Professor, ECM Department, KL University, A.P, India. 2 (I/II) M.TECH,

More information

Automated Switching Mechanism for Multi-Standard RFID Transponder

Automated Switching Mechanism for Multi-Standard RFID Transponder Automated Switching Mechanism for Multi-Standard RFID Transponder Teh Kim Ting and Khaw Mei Kum Faculty of Engineering Multimedia University Cyberjaya, Malaysia mkkhaw@mmu.edu.my Abstract This paper presents

More information

An equivalent circuit of a loop antenna.

An equivalent circuit of a loop antenna. 3.2.1. Circuit Modeling: Loop Impedance A loop antenna can be represented by a lumped circuit when its dimension is small with respect to a wavelength. In this representation, the circuit parameters (generally

More information

MSE-WCom ZHAW-ZSN, M. Rupf 1 HF-RFID. Inductive RFID-Reader. References

MSE-WCom ZHAW-ZSN, M. Rupf 1 HF-RFID. Inductive RFID-Reader. References HF-RFID MSE, HF-RFID, 1 References [1] Klaus Finkenzeller, RFID-Handbuch, 5. Auflage, Hanser, 008. [] R. Küng, M. Rupf, RFID-Blockkurs, ergänzende MSE-Veranstaltung, ZHAW, 011. Kontakt: ZHAW Zürcher Hochschule

More information

FILTERS - IN RADIO COMMUNICATIONS

FILTERS - IN RADIO COMMUNICATIONS Reading 32 Ron Bertrand VK2DQ http://www.radioelectronicschool.com FILTERS - IN RADIO COMMUNICATIONS RADIO SIGNALS In radio communications we talk a lot about radio signals. A radio signal is a very broad

More information

UNDERSTANDING AND CONTROLLING COMMON-MODE EMISSIONS IN HIGH-POWER ELECTRONICS

UNDERSTANDING AND CONTROLLING COMMON-MODE EMISSIONS IN HIGH-POWER ELECTRONICS Page 1 UNDERSTANDING AND CONTROLLING COMMON-MODE EMISSIONS IN HIGH-POWER ELECTRONICS By Henry Ott Consultants Livingston, NJ 07039 (973) 992-1793 www.hottconsultants.com hott@ieee.org Page 2 THE BASIC

More information

RigExpert AA-30 Antenna Analyzer (0.1 to 30 MHz) AA-54 Antenna Analyzer (0.1 to 54 MHz) User s manual

RigExpert AA-30 Antenna Analyzer (0.1 to 30 MHz) AA-54 Antenna Analyzer (0.1 to 54 MHz) User s manual RigExpert AA-30 Antenna Analyzer (0.1 to 30 MHz) AA-54 Antenna Analyzer (0.1 to 54 MHz) User s manual Table of contents 1. Description... 3 2. Specifications... 4 3. Precautions... 5 4. Operation... 6

More information

RFID tags are further broken down into two categories:

RFID tags are further broken down into two categories: RFID White Paper Introduction Radio Frequency Identification (RFID) technology has been attracting considerable attention with its promise of improved supply chain visibility for both suppliers and retailers.

More information

Abracon PTM Introduction to ANFCA Series Flexible Peel & Stick NFC Antennas

Abracon PTM Introduction to ANFCA Series Flexible Peel & Stick NFC Antennas Abracon PTM Introduction to ANFCA Series Flexible Peel & Stick NFC Antennas WWW.ABRACON.COM ANFCA Series Flexible Peel & Stick NFC Antennas Purpose To introduce ANFCA Series, Flexible Peel & Stick NFC

More information

PHY114 S11 Term Exam 3

PHY114 S11 Term Exam 3 PHY4 S Term Exam S. G. Rajeev Mar 2 20 2:0 pm to :45 pm PLEASE write your workshop number and your workshop leader s name at the top of your book, so that you can collect your graded exams at the workshop.

More information

DUAL BAND CELL PHONE JAMMER 2013-14

DUAL BAND CELL PHONE JAMMER 2013-14 A PROJECT REPORT ON DUAL BAND CELL PHONE JAMMER 2013-14 SUBMITTED BY Afzal Ibrahim 11509 Momin Muzammil 11512 Khan Mohammed Khalid 11520 Mohsin Khan 11521 GUIDED BY PROF.NIYAZ KHAN Department Of Electronics

More information

Experiment # (4) AM Demodulator

Experiment # (4) AM Demodulator Islamic University of Gaza Faculty of Engineering Electrical Department Experiment # (4) AM Demodulator Communications Engineering I (Lab.) Prepared by: Eng. Omar A. Qarmout Eng. Mohammed K. Abu Foul Experiment

More information

Application Note 58 Crystal Considerations for Dallas Real-Time Clocks

Application Note 58 Crystal Considerations for Dallas Real-Time Clocks www.maxim-ic.com Application Note 58 Crystal Considerations for Dallas Real-Time Clocks OVERVIEW This application note describes crystal selection and layout techniques for connecting a 32,768Hz crystal

More information

Homebuilt HF Radios for Use Underground Paul R. Jorgenson KE7HR

Homebuilt HF Radios for Use Underground Paul R. Jorgenson KE7HR Homebuilt HF Radios for Use Underground Paul R. Jorgenson KE7HR With the good success in using Amateur Band HF radio for underground communications, I started looking for cheaper alternatives to the $500+

More information

Embedded Structural Health Monitoring system for fiber reinforced composite structures with wireless energy and data transmission

Embedded Structural Health Monitoring system for fiber reinforced composite structures with wireless energy and data transmission Embedded Structural Health Monitoring system for fiber reinforced composite structures with wireless energy and data transmission Dipl.-Ing. Tobias Dräger, Dr.-Ing. Iker Mayordomo, Dipl.-Ing. Josef Bernhard

More information