60-GHz CMOS Current-Combining PA with Adaptive Back-Off PAE Enhancement

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Author(s)

  • Haiwei Zhang
  • Quan Xue

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number7419869
Pages (from-to)823-827
Journal / PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
Volume63
Issue number9
Publication statusPublished - 1 Sept 2016

Link(s)

DOI

DOI
Check@CityULib
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-84986222467&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(4ab68142-84ac-4af5-a1f0-dddfe73da6b9).html

Abstract

This brief describes the design and implementation of a current-combining power amplifier (PA) with a fully adaptive approach to enhance the output power and the back-off power-added efficiency (PAE). The PA consists of a main amplifier and an auxiliary amplifier. Adaptive biasing technique is employed to shut down or provide optimum bias voltage to the auxiliary amplifier according to the input power level. The 50-$\Omega$ input matching is realized with adaptive power distribution. The output load modulation is accomplished by a compact output matching network (MN) using transmission lines and transformers. Based on the same MN, the back-off PAE degradation caused by the low output impedance of the auxiliary path is mitigated. The proposed PA is designed at 60 GHz using 65-nm CMOS and is experimentally characterized. The measurement results reveal 16-dBm OP1dB and 14% peak PAE. Approximately 8% PAE at 6-dB back-off is achieved, addressing improved back-off efficiency.

Research Area(s)

  • 60 GHz, Adaptive, back-off efficiency, CMOS, current-combining, power amplifier (PA)

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Publication fingerprints text

100
Power Amplifier Keyphrases
100
Power Added Efficie... Keyphrases
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Efficiency Enhancem... Keyphrases
100
Power Back-off Keyphrases
100
Current Combining Keyphrases
100
Enhancement Engineering
100
power INIS
100
efficiency INIS
100
ghz range INIS
100
power amplifiers INIS
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Citation Format(s)

[ RIS ] [ BibTeX ]
60-GHz CMOS Current-Combining PA with Adaptive Back-Off PAE Enhancement. / Zhang, Haiwei; Xue, Quan.
In: IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 63, No. 9, 7419869, 01.09.2016, p. 823-827.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review