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Design Analysis Ericsson W-CDMA/LTE 2100MHz RRUS12 B4 2x60W Remote Radio Unit

  • April 2015
  • 159 pages
  • EJL Wireless Research LLC
Report ID: 2861416


Table of Contents

This report is a design “teardown” analysis of an Ericsson 2100MHz Band 4 2x2 MIMO remote radio unit multi-standard (RRUS) supporting LTE technology. The analysis covers the entire system including the power supply, transmit, receive, amplifiers and duplexer filters functions. A simplified mechanical analysis of the unit along with detailed bill of materials analysis is presented in this report. The Ericsson product name is RRUS12 B4. The Ericsson P/N for this RRUS is KRC 161 349/2 R1B.

Active/Passive Component Summary
Total Weight: 26.3 kg [4]
Total Active/Passive Components: [1]
Total Active/Passive Components: [2]
Total Active Components: [2]
Total Passive Components: [2]
Total Other Components: [3]

[1] Excluding components on hybrid modules and DC/RF cables & connectors
[2] Including components on hybrid modules and excluding DC/RF cables & connectors
[3] Primarily DC/RF Cables & Connectors
[4] Including solar shields, 23.1kg without solar shields.

Important Note:
This particular unit was built in Q4 2013, given the date codes present on many of the semiconductor integrated circuits contained within the unit as well as on the front panel of the unit. As such, some or many of the components, both active and passive, have been updated or replaced by more recent part numbers. The majority of the components contained within the bill of materials analysis are not RoHS compliant. We believe that the overall system and functionality presented has not changed dramatically compared to the latest version of this unit.

Where possible, all components, both passive and active, have been identified with the manufacturer’s part number within the bill of materials analysis. This analysis does not include any pricing information or estimated costs on the mechanical design or for any passive or active components contained within the system.

All dimensions, unless otherwise specifically stated, are in metric format.

This report covers the design analysis of an Ericsson W-CDMA/LTE 2100MHz RRUS12 B4 2x60W remote radio unit. This unit is part of the RBS6601 main/remote base station platform for Ericsson supporting GSM/W-CDMA/LTE. The unit was manufactured in Q4 2013.

Key Findings:

The remote radio unit uses an innovative heat dissipation system to keep the high power amplifiers from overheating.

Ericsson has switched to a new transceiver architecture that increases integration of semiconductor and passive components to reduce overall system size.

Component and semiconductor suppliers mentioned in this report include: Analog Devices, Altera, Anaren Microwave, Coilcraft, Epson Toyocom, Fairchild Semiconductor, Hittite Microwave, Infineon Technologies, Integrated Device Technology, Kemet, Maxim Integrated Products, Micron, Murata, National Semiconductor, NDK, Nippon Chemi-Con, NXP Semiconductors, ON Semiconductor, Panasonic, Peregrine Semiconductor, Pulse Engineering, RF MicroDevices, Skyworks Solutions, STMicroelectronics, TDK-Epcos, Texas Instruments, TriQuint Semiconductors and Vishay Semiconductors.

Complete Part Number/Marking
Component Manufacturer Identification
Function Component Description
Package Type

Total Pages: 159
Total Tables: 48
Total Exhibits: 135

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