A wide range CMOS power amplifier with improved group delay variation and gain flatness for UWB transmitters

Rohana Sapawi, Ramesh Pokharel, Haruichi Kanaya, Keiji Yoshida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper presents the design and implementation of 0.9-4.8 GHz CMOS power amplifier (PA) with improved group delay variation and gain flatness at the same time for UWB transmitters. This PA design employs a two-stage cascade common source topology, a resistive shunt feedback technique and inductive peaking to achieve high gain flatness, and good input matching. Based on theoretical analysis, the main design factor for group delay variation is identified. The measurement results indicate that the proposed PA design has an average gain of 10.2 ± 0.8 dB while maintaining a 3-dB bandwidth of 0.57 to 5.8 GHz, an input return loss |S11| less than-4.4 dB, and an output return loss |S22| less than-9.2 dB over the frequency range of interest. The input 1 dB compression point at 2 GHz was-9dBm while consumes 30 mW power from 1.5 V supply voltage. Moreover, excellent phase linearity (i.e., group delay variation) of ±125 ps was achieved across the whole band.

Original languageEnglish
Pages (from-to)1182-1188
Number of pages7
JournalIEICE Transactions on Electronics
VolumeE95-C
Issue number7
DOIs
Publication statusPublished - Jan 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A wide range CMOS power amplifier with improved group delay variation and gain flatness for UWB transmitters'. Together they form a unique fingerprint.

  • Cite this