Title: A low power 35 GHz CMOS high linearity, unconditional stability and excellent gain flatness UWB power amplifier design using current reused technique

Authors: Vishakha Bhale; Upena Dalal

Addresses: Electronics Engineering Department, Sardar Vallabhbhai National Institute of Technology (SV NIT), Surat-395 007, Gujrat, India ' Electronics Engineering Department, Sardar Vallabhbhai National Institute of Technology (SV NIT), Surat-395 007, Gujrat, India

Abstract: A two-stage 0.18 µm RF CMOS current reused class-AB power amplifier design is proposed for 35 GHz ultra-wide-band application. It uses a cascade with current reused as first stage and common source with resistive feedback as a second stage. The simulation results shows a gain flatness of 24 dB and an input 1 dB compression of −14.63 dBm while consuming 22.6 mW of power from 1.8 V supply. Further, the input and output return loss of less than −9 dB and −15 dB respectively is obtained and reverse isolation of less than −58 dB provides good port to port isolation. The efficiency of the designed power amplifier is 24% at an input RF power of −5 dBm. Unconditional stability, good linear and low power consumption is the novelty of the proposed PA design with a considerable group delay of ± 550 pS.

Keywords: cascade; current reused; efficiency; group delay; power amplifier design; resistive feedback; source degeneration; shunt peaking; ultra wideband; UWB; linearity; low power CMOS; unconditional stability; simulation; return loss; port isolation; power consumption.

DOI: 10.1504/IJUWBCS.2015.077097

International Journal of Ultra Wideband Communications and Systems, 2015 Vol.3 No.2, pp.51 - 58

Received: 01 May 2014
Accepted: 06 Sep 2014
Published online: 21 Jun 2016 *

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