A flat gain/power responses 618 GHz power amplifier MMIC with high PAE by using transformer networks

Yu, Shu-Jenn; Hsu, Wei-Chou; Lee, Ching-Sung; Chang, Chian-Sern; Wu, Chang-Luen; Chang, Christophe

doi:10.1002/mop.23033

Cited by 3 publications

(1 citation statement)

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“…Broadband power amplifiers have been used in transmitters for military, medical, satellite, broadcasting, and instrumental applications [1–14]. Moreover, emerging broadband wireless communication systems, including various software‐defined or cognitive radio systems, require transmitters having a broader operational bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Design of a broadband power amplifier using an optimized feedback network

Kim

Seo

Jeon

et al. 2011

Micro & Optical Tech Letters

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This article presents a systematic design method for ultra broadband power amplifiers using an optimized feedback network. Based on the analysis using the network parameters for the open‐loop circuit and feedback network, a design and optimization procedure was established. To make the gain response as flat as possible throughout the broad operating frequency band, the optimized component values of the feedback network were found using an optimization program which was built based on the least‐mean‐square‐error algorithm in MATLAB. Single‐ended broadband power amplifiers were implemented to verify the optimization results for various target gains, as well as source and load impedance sets. One of the single‐ended amplifiers was selected for use as part of the push–pull power amplifier which includes broad‐band 1:1 transmission line transformers. For the operational bandwidth from 8 to 800 MHz, the ultra broad‐band push–pull power amplifier exhibited a flat gain response of ±0.331 dB from 17.2 dB, a P1dB of more than 40.5 dBm, and high PAE from 26.7 to 45 % at each P1dB point. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2846–2851, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26372

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Section: Introductionmentioning

confidence: 99%