Broadband high efficiency circularly polarized active integrated antenna

Yi Qin, Steven Gao, Michael Elsdon, Alistair Sambell

Research output: Contribution to conferencePaperpeer-review

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.
Original languageEnglish
DOIs
Publication statusPublished - Dec 2005
EventAPMC 2005: 17th Asia-Pacific Microwave Conference - Suzhou, China
Duration: 1 Dec 2005 → …

Conference

ConferenceAPMC 2005: 17th Asia-Pacific Microwave Conference
Period1/12/05 → …

Fingerprint Dive into the research topics of 'Broadband high efficiency circularly polarized active integrated antenna'. Together they form a unique fingerprint.

Cite this