VJ 64 UHF Chip Antenna for Mobile Devices VJ 64 The company s products are covered by one or more of the following: WO2862 (A1), US2833 (A1), US283575 (A1), WO281173 (A1). Other patents pending. DESCRIPTION The VJ 64 multi-layer ceramic chip antenna is a small form-factor, high-performance, chip-antenna designed for TV reception in mobile devices in the UHF band. It allows mobile TV device manufacturers to design high quality products that do not bear the penalty of a large external antenna. Utilizing Vishay's unique materials and manufacturing technologies, this product complies with the MBRAI standard while maintaining a small outline. Focusing on consumer applications, the antenna is designed to be assembled onto a PC board in the standard reflow process. Target customers of the VJ 64 are mobile phone makers, portable multimedia device makers, notebook OEMs and ODMs, and accessory card OEMs and ODMs. The VJ 64 is the first of a family of products developed by Vishay, a world leader in manufacturing of discrete and passive components. FEATURES Small outline (1.5 mm x 15.5 mm x 1.2 mm) Omni-directional, linear polarization Complies with MBRAI standard Complete UHF band coverage (47 MHz to 86 MHz) up to 1.1 GHz Requires a tuning circuit and ground plane for optimal performance Standard SMT assembly 5 unbalanced interface Operating temperature range (-4 C to +85 C) Reference design and evaluation boards available upon request Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 APPLICATIONS Mobile UHF TV receivers including DVB-T, DVB-H, ISDB-T, CMMB, ATSC, and MediaFLO devices ANTENNE PERFORMANCE Peak Gain The antenna radiation characteristics are influenced by several factors including ground plane dimensions and impedance matching network. The antenna parameters presented hereafter were measured according to the configuration suggested by the VJ 64 evaluation board, utilizing its four channel active digital tuning circuit. The evaluation board ground plane is 4 mm by 8 mm large. Fig. 1 shows peak gain over frequency throughout the UHF band, compared with the MBRAI requirements. -2 Peak Gain (dbi) -4-6 -8 Measured Simulated Standard -1-12 45 5 55 6 65 7 75 8 85 9 Frequency (MHz) Fig. 1 - Peak Gain vs. Frequency Revision: 3-Mar 1 Document Number: 45157 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91
VJ 64 Fig. 2 displays the measured and simulated radiation efficiency of VJ 64 over frequency. 4 35 Simulated value Efficiency (%) 3 25 2 15 1 5 Measured value 46 51 56 61 71 76 81 86 Frequency (MHz) Fig. 2 - Radiation Efficiency vs. Frequency Applications that do not require full coverage of the UHF band can gain an additional two to three dbi by removing the tuning circuit. In this case the antenna can be fixed to any 15 MHz band within the UHF range. QUICK REFERENCE DATA SERIES RADIATION PATTERN The 3D planes of VJ 64 are defined in Fig. 3. FREQUENCY (MHz) MAX. GAIN (dbi) AVERAGE GAIN (dbi) VJ64M11SXISRA 47 to 86-2 -3 Z X Y Fig. 3 - VJ 64 3D Plane Definition Revision: 3-Mar 2 Document Number: 45157 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91
VJ 64 Fig. 4 displays the simulated 3D radiation pattern at 65 MHz. Fig. 4 - Simulated Radiation Pattern Fig. 5 displays the measured radiation patterns of VJ 64 evaluation board in the YZ plane as defined in Fig. 3. Zero degrees is defined at the Z axis, stepping counter clockwise. 5 MHz - Gain (dbi) vs. Angle ( ) 3 6 9 12 12 15 156 162 12 6-1 -2-3 -4 168 174 6 3 3 3 3 192 198 33 3 3 21 7 MHz - Gain (dbi) vs. Angle ( ) 3 6 9 12 12 15156 12 6-1 -2-3 -4 3 162 168 174 6 3 3 3 33 3 3 21 192198 3 3 6 6 27 27 6 MHz - Gain (dbi) vs. Angle ( ) 6 12 3-1 -2 6-3 -4 9 12 12 15 156 162 168 174 3 3 3 6 192 198 3 33 3 3 21 8 MHz - Gain (dbi) vs. Angle ( ) 12 3 6 9 12 12 15 156 162 168 3 6 27 6 3 3 3 3 33 3-1 3-2 3-3 -4 G 27 174 6 192 198 21 6 Fig. 5 - Measured Radiation Pattern Revision: 3-Mar 3 Document Number: 45157 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91
VJ 64 FOOTPRINT AND MECHANICAL DIMENSIONS The antenna footprint and mechanical dimensions are presented in Fig. 6. For mechanical support, it is recommended to add one or two drops of heat curing epoxy glue. The glue dot should not overlap with any of the soldering pads. It is recommended to apply the glue dot at the center of the antenna, as shown by the diagonal pattern. For more details see VJ 64 Assembly Guidelines section below..35.35.5.5.35 3.6 4.6 3.6 1. 1. `.35 1. 4.65.5 Glue dot area 4.65.35 1. All dimensions in mm Figure not in scale 1..35 RF feed connects here Fig. 6 - VJ 64 Footprint VJ 64 ASSEMBLY GUIDELINES 1. Mounting of antennas on a printed circuit board should be done by reflow soldering. The reflow soldering profiles are shown below. 2. In order to provide the adequate strength between the antenna and the PCB the application of a dot of heat cured epoxy glue in the center of the footprint of the antenna prior to the antenna s soldering to the board should be done. An example for such glue could be Heraeus PD 862 SA. The weight of the dot should be 5 mg to 1 mg. 3 T ( C) 25 2 > 215 C: 2 s to 4 s Max. temperature 15 1 Min. temperature Sn-Pb eutectic solder paste 5 3 s to 6 s 3 s to 6 s 3 s to 6 s Time Fig. 7 - Soldering IR Reflow with SnPb Solder Revision: 3-Mar 4 Document Number: 45157 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91
VJ 64 3 T ( C) 26 C 25 5 C 215 C 2 C 1 s 1 s 4 s 15 13 C 1 5 2 K/s 5 1 15 2 t (s) 25 Fig. 8 - Soldering Reflow with Sn Solder 3 T ( C) 25 Max. temperature 2 Sn-Ag-Cu solder paste 15 1 Min. temperature 5 6 s to 12 s 3 s to 6 s 6 s to 12 s 6 s to 12 s Time Fig. 9 - Soldering IR Reflow with SnAgCu Solder ORDERING INFORMATION VISHAY MATERIAL PACKAGING QUANTITY VJ 64 VJ64M11SXISRA 1 pieces Revision: 3-Mar 5 Document Number: 45157 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91
Legal Disclaimer Notice Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, Vishay ), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer s technical experts. Product specifications do not expand or otherwise modify Vishay s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. Revision: 13-Jun-16 1 Document Number: 91