Broadband high efficiency circularly polarized active integrated antenna

Qin, Yi, Gao, Steven, Elsdon, Michael and Sambell, Alistair (2005) Broadband high efficiency circularly polarized active integrated antenna. In: APMC 2005: 17th Asia-Pacific Microwave Conference, 4th - 7th December 2005, Suzhou, China.

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Abstract

This paper presents a broadband high efficiency circularly polarized active antenna integrated with class-E power amplifier (PA) at 2GHz. A single circular microstrip patch fed by a cross slot is employed as not only a broadband circularly polarized radiator but also as a harmonics-termination load network, which is directly connected with the class-E power amplifier output. A low cost PCB technology is employed in the circuit fabrication and a low voltage PHEMT transistor is used. A peak drain efficiency of 71.1% for the class-E amplifier is measured at 2.05GHz, together with a maximum radiated power of 28.2 dBm from the active integrated antenna (AIA). A power added efficiency (PAE) over 50% within a 17% bandwidth from 1.92GHz to 2.28GHz is achieved. Axial ratio below 3 dB is obtained over a 9% bandwidth from 1.99 GHz to 2.18 GHz.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	UHF power amplifiers; active antennas; broadband antennas; microstrip antennas; polarisation; power HEMT; slot antennas
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	29 Jan 2015 11:24
Last Modified:	12 Oct 2019 19:06
URI:	http://nrl.northumbria.ac.uk/id/eprint/20097

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