Bandwidth Enhancement Technique with Low Group Delay Variation CMOS Power Amplifier for UWB System

Authors

  • Rohana Sapawi Department of Electrical and Electronic Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
  • Siti Kudnie Sahari Department of Electrical and Electronic Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
  • Dayang Nur Salmi Dharmiza Awang Salleh Department of Electrical and Electronic Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
  • Dayang Azra Awang Mat Department of Electrical and Electronic Engineering, Faculty of Engineering, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
  • Sohiful Anuar Zainol Murad School of Microelectronic Engineering, Universiti Malaysia Perlis (UniMAP), Malaysia.

Keywords:

Bandwidth Enhancement, Cascade Topology, CMOS PA, Group Delay Variation, UWB,

Abstract

This paper introduced a bandwidth enhancement technique for ultra-wideband (UWB) transmitter design with low group delay variation for CMOS power amplifier (PA). Three stages of cascade common source topology are implemented to provide high gain with good gain flatness. Shunt peaking inductor is introduced at every stage of the introduced PA to improve the bandwidth and to achieve low group delay variation simultaneously. A resistive shunt feedback method is implemented at the first stage to acquire good input matching. The first and second stages attain gain at lower corner and upper-end frequency respectively, whilst the third stage smoothed the gain flatness curve. In addition, the theoretical analysis of group delay is investigated to determine the important design factor for low group delay variation in 3.1 to 10.6 GHz CMOS PA for UWB transmitters. The outcome of the research shows that a gain about 11.48 ± 0.6 dB at average, S11 less than -10 dB, and S22 less than -14 dB is achieved. Moreover, excellent group delay variation is acquired throughout the entire band, measuring about ±85.8 ps.

Downloads

Download data is not yet available.

Downloads

Published

2017-12-07

How to Cite

Sapawi, R., Sahari, S. K., Awang Salleh, D. N. S. D., Awang Mat, D. A., & Zainol Murad, S. A. (2017). Bandwidth Enhancement Technique with Low Group Delay Variation CMOS Power Amplifier for UWB System. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 9(3-10), 41–47. Retrieved from https://jtec.utem.edu.my/jtec/article/view/3152

Most read articles by the same author(s)