Huawei Technologies WD5MMRFU88B Model MRFU 900B V1 60W. December 2012

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1 DesigN Analysis - Infrastructure Earl J. Lum elum@ejlwireless.com Huawei Technologies WD5MMRFU88B Model MRFU 900B V1 60W December 2012 Entire contents. Reproduction of this publication in any form without prior written permission is strictly forbidden and will be prosecuted to the fully extent of US and International laws. The transfer of this publication in either paper or electronic form to unlicensed third parties is strictly forbidden. The information contained herein has been obtained from sources EJL Wireless Research LLC deems reliable. EJL Wireless Research disclaims all warranties as to the accuracy, completeness or adequacy of such information. EJL Wireless Research LLC shall have no liability for errors, omissions or inadequacies in the information contained herein or for the interpretation thereof. The reader assumes sole responsibility for the selection of these materials to achieve its intended results. The opinions expressed herein are subject to change without notice.

2 TABLE OF CONTENTS EXECUTIVE SUMMARY... 6 Active/Passive Component Summary... 6 Important Note:... 6 CHAPTER 1: HUAWEI BTS3900 BTS SYSTEM... 7 Overview of BTS3900 Product Offering... 7 CHAPTER 2: MRFU MECHANICAL ANALYSIS... 9 Mechanical Analysis... 9 CHAPTER 3: MRFU TRX SUBSYSTEM Digital Processor and TRx PCB...15 Area A: Baseband Signal Processing...19 Area B: Power Supply...22 Area C1: Dual RF Receiver LNA...25 Area C2: VSWR Monitoring Circuit...28 Area D: IF Receiver...30 Area E: RF Power Amplifier Tx Sampling Circuit...33 Area F1: MRFU Transmit D/A Conversion...35 Area F2: MRFU Transmit Path...37 MVCO1475 Frequency Synthesizer Module...40 MVCO804 Frequency Synthesizer Module...42 CHAPTER 6: MRFU RF AMPLIFIER SUBSYSTEM MRFU RF Power Amplifier Heat Sink...49 CHAPTER 7: MRFU DUPLEXER CAVITY FILTER RF SUBSYSTEM APPENDIX A - PASSIVE CASE SIZE ANALYSIS APPENDIX B - ACTIVE COMPONENT MARKET SHARE ANALYSIS

3 TABLES Table 1: Area A Bill of Materials Table 2: Area B Bill of Materials Table 3: Area C1 Bill of Materials Table 4: Area C2 Bill of Materials Table 5: Area D Bill of Materials Table 6: Area E Bill of Materials Table 7: Area F1 Bill of Materials Table 8: Area F2 Bill of Materials Table 9: MVCO1475 Module Bill of Materials Table 10: MVCO804 Module Bill of Materials Table 11: MRFU RF Power Amplifier Area A Bill of Materials Table 12: Duplexer Filter Area A Bill of Materials...63 Table 13: Duplexer Filter Area B Bill of Materials...63 Table 14: Passive Component Case Size Distribution by System Subsection Table 15: Identified Passive Component Supplier Distribution by System Subsection Table 16: Active/Passive Component Distribution by System Subsection Table 17: Active Semiconductor/Component Vendor Distribution by System Subsection

4 EXHIBITS Exhibit 1: BTS Exhibit 2: MRFU Chain and Star Topology...8 Exhibit 3: MRFU Faceplate...9 Exhibit 4: MRFU Connector Port Detail Exhibit 5: MRFU Top View Exhibit 6: MRFU Rear View Exhibit 7: MRFU Bottom View Exhibit 8: MRFU Side View Exhibit 9: RF Shield External View Exhibit 10: RF Shield Internal View Exhibit 11: RF Shield Internal View w/thermal Pads Removed Exhibit 12: MRFU TRx PCB vs. Power Amplifier PCB Exhibit 13: MRFU TRx PCB, Top View...16 Exhibit 14: MRFU TRx PCB, Bottom View Exhibit 15: MRFU TRx PCB, Top View with Power Amplifier Board Removed Exhibit 16: MRFU TRx PCB, Bottom View with Power Amplifier Board Removed Exhibit 17: Area A Component Diagram Exhibit 18: Area B Component Diagram Exhibit 19: Area C1 Component Diagram Exhibit 20: Area C1 Block Diagram Exhibit 21: MRFU Module Interconnection Exhibit 22: Area C2 Component Diagram Exhibit 23: Area D Component Diagram Exhibit 24: Area D Block Diagram Exhibit 25: Area E Component Diagram Exhibit 26: Area E Block Diagram Exhibit 27: Area F1 Component Diagram Exhibit 28: Area F2 Block Diagram Exhibit 29: Area F2 Component Diagram Exhibit 30: MVCO1475 Module Component Diagram Exhibit 31: MVCO804 Module Component Diagram Exhibit 32: MRFU RF Amplifier PCB, Top View Exhibit 33: MRFU RF Power Amplifier PCB, Bottom View Exhibit 34: MRFU RF Power Amplifier Tx Path Block Diagram Exhibit 35: MRFU RF Power Amplifier Area G Component Diagram Exhibit 36: MRFU RF Power Amplifier Construction, Exploded Side View Exhibit 37: MRFU RF Power Amplifier Secondary Heat Sink Exhibit 38: MRFU Secondary Heat Sink, Bottom View Exhibit 39: MRFU Secondary Heat Sink, Side View Exhibit 40: MRFU Duplexer Filter, Top View Exhibit 41: MRFU Duplexer Filter, Front View Exhibit 42: MRFU Duplexer Filter, Rear View Exhibit 43: MRFU Duplexer Filter, Bottom View Exhibit 44: MRFU Duplexer Filter, Side View Exhibit 45: MRFU Duplexer Filter, Major Components Exhibit 46: MRFU Duplexer Filter RF Connection Socket Exhibit 47: MRFU Duplexer Filter Shielding, External View Exhibit 48: MRFU Duplexer Filter Shielding, Internal View Exhibit 49: MRFU Duplexer Filter RF Shield, External View Exhibit 50: MRFU Duplexer Filter RF Shield, Internal View Exhibit 51: MRFU Duplexer Filter RF Paths Exhibit 52: Duplexer Filter Tx Path Coupler Analysis Exhibit 53: Duplexer Filter Tx Path Coupler Analysis, Poles Removed Exhibit 54: Duplexer Filter Rx Path Coupler Analysis Exhibit 55: Duplexer Filter Rx Path Coupler Analysis, Poles Removed Exhibit 56: Duplexer Filter Coupler Dimensions Exhibit 57: Duplexer Filter Pole Element Dimensions Exhibit 58: Duplexer Filter Areas Exhibit 59: Duplexer Filter Area A Component Diagram, PCB Top Exhibit 60: Duplexer Filter Area A Component Diagram, PCB Bottom

5 Exhibit 61: Duplexer Filter Area B Component Diagram, PCB Top Exhibit 62: Passive Component Case Size Distribution Exhibit 63: Identified Passive Component Market Share by Vendor Exhibit 64: Active Semiconductor Component Share Exhibit 65: High Pin Count IC vs. Discretes...68 Exhibit 66: Active Semiconductor Market Share by Vendor Exhibit 67: High Pin Count (64+) Active Semiconductor Market Share by Vendor