A highly efficient 1-Watt broadband class-J SiGe power amplifier at 700MHz

Ruili Wu, Jerry Lopez, Yan Li, Donald Y.C. Lie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

17 Scopus citations

Abstract

In this paper, the design and measurement results of a highly efficient 1-Watt broadband class J SiGe power amplifier (PA) at 700 MHz are reported. Comparisons between a class J PA and a traditional class AB/B PA have been made, first through theoretical analysis in terms of load network, efficiency and bandwidth behavior, and secondly by bench measurement data. A single-ended power cell is designed and fabricated in the 0.35 μm IBM 5PAe SiGe BiCMOS technology with through-wafer-vias (TWVs). Watt-level output power with greater than 50% efficiency is achieved on bench across a wide bandwidth of 500 MHz to 900 MHz for the class J PA (i.e., >57% bandwidth at the center frequency of 700 MHz). P sat of 30.9 dBm with 62% collector efficiency (CE) at 700 MHz is measured while the highest efficiency of 68.9% occurs at 650 MHz using a 4.2 V supply. Load network of this class J PA is realized with lumped passive components on a FR4 printed circuit board (PCB). A narrow-band class AB PA counterpart is also designed and fabricated for comparison. The data suggests that the broadband class J SiGe PA can be promising for future multi-band wireless applications.

Original languageEnglish
Title of host publication2012 IEEE 12th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2012 - Digest of Papers
Pages69-72
Number of pages4
DOIs
StatePublished - 2012
Event2012 IEEE 12th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2012 - Santa Clara, CA, United States
Duration: Jan 16 2012Jan 18 2012

Publication series

Name2012 IEEE 12th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2012 - Digest of Papers

Conference

Conference2012 IEEE 12th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2012
CountryUnited States
CitySanta Clara, CA
Period01/16/1201/18/12

Keywords

  • Class AB/B
  • Class J
  • SiGe power amplifiers (PA)
  • Watt level
  • broadband PA

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