High-efficiency class-B push–pull amplifying array for microwave transmitting front end

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High-efficiency class-B push–pull amplifying array for microwave transmitting front end

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IEE Proceedings - Microwaves, Antennas and Propagation — Recommend this title to your library

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The authors present a novel push–pull amplifying array using quadruple antenna-patch couplers and dual-feed antennas. It exploits the advantages of both class-B push–pull amplifiers and active integrated antennas (AIAs), resulting in a high-efficiency, linear and yet compact design. A state-of-the-art heterojunction FET power amplifier of 50% peak power-added efficiency (PAE) is achieved at 10 GHz. A three-element array prototype was successfully built, achieving a peak antenna gain of 19.6 dBi. This is 5.7 and 10.4 dB better than amplifying arrays using the antenna-patch coupler approach and the conventional parallel feeding network, respectively.

Inspec keywords: multifrequency antennas; microwave field effect transistors; differential amplifiers; antenna feeds; microwave power amplifiers; microstrip antenna arrays

Other keywords: power-added efficiency; active integrated antenna; dual-feed antenna; PAE; class-B push-pull amplifier; state-of-the-art heterojunction FET; three-element array prototype; 10 GHz; quadruple antenna-patch coupler; power amplifier; AIA; microwave transmitting front end; field effect transistor

Subjects: Antenna accessories; Antenna arrays; Solid-state microwave circuits and devices; Amplifiers

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      • Aanandan, C.K., Mohanan, P., Nair, K.G.: `Theoretical analysis of compact and broad-band microstrip antenna with gap-coupled parasitic elements along the non-radiating edges', IEEE AP-Society Int. Symp., 1989, San Jose, p. 463–466.
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