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STUDIES OF BROADBAND CIRCULARLY POLARIZED PLANAR ANTENNAS FOR WIRELESS COMMUNICATIONS

by Su, Che-Wei

Abstract (Summary)
This paper proposes two innovative designs for the broadband and high-gain circularly polarized operation, a corner-truncated inverted -L patch antenna and a cylindrical-probe-fed circularly polarized patch antenna using a single probe feed. Next, the broad circularly polarized printed spiral strip antenna for 5 GHz WLAN operation is studied; we also proporse a compact dual-band circularly polarized antenna for GPS/ETC operation on vechicles. In addition, an experimental study of the nearly square circularly polarized microstrip antenna with a rectangular ground plane is presented. The CP antennas are greatly affected by the different side lengths of the rectangular ground plane. To compensate for this effect, the aspect ratio of the nearly square radiating patch should be increased with the increasing aspect ratio of the rectangular ground plane.
Bibliographical Information:

Advisor:none; none; none; none; none

School:National Sun Yat-Sen University

School Location:China - Taiwan

Source Type:Master's Thesis

Keywords:spiral antenna circularly polarized integrated broadband patch

ISBN:

Date of Publication:05/27/2004

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