A Novel Design Approach for Highly Efficient Multioctave Bandwidth GaN Power Amplifiers

This letter presents a novel approach to design highly efficient multioctave bandwidth power amplifiers (PAs). The fundamental load impedances are slightly detuned out of their optimum values to reduce the in-band harmonics influence on output power and power-added efficiency. The design of the outp...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 27; no. 4; pp. 371 - 373
Main Authors Arnous, Mhd Tareq, Zihui Zhang, Barbin, Silvio E., Boeck, Georg
Format Journal Article
LanguageEnglish
Published IEEE 01.04.2017
Subjects
Bandwidth
Gallium nitride
GaN-HEMT
Guanella transformer
Harmonic analysis
high efficiency
Impedance
multioctave
Power generation
Transistors
Transmission line measurements
ultra-wideband power amplifier (PA)
wideband matching network
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Summary:This letter presents a novel approach to design highly efficient multioctave bandwidth power amplifiers (PAs). The fundamental load impedances are slightly detuned out of their optimum values to reduce the in-band harmonics influence on output power and power-added efficiency. The design of the output matching network includes a 4:1 planar Guanella transformer for wide bandwidth and low complexity. In the frequency band 0.5-2.7 GHz, the PA achieves 9.2 ± 1.2 dB power gain and more than 20-W output power. The drain efficiency varies from 56% to 70% over the bandwidth.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2017.2678436