Summary
International Symposium on Antennas and Propagation
2006
Session Number:2D1b
Session:
Number:2D1b-4
Broadband Circularly Polarized Microstrip Antenna Element and Array with a New Feed
Nasimuddin, Karu P. Esselle,
pp.1-6
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
A new feed is presented for circularly polarized stacked rectangular microstrip antenna elements and their arrays. It consists of a combination of a microstrip line and a via pin. We also present a systematic process to optimise the axial ratio (AR) bandwidth and ellipticity of these antennas. To realize a wide band circularly polarised stacked microstrip patch antenna (CPSMA), a driven patch and a parasitic patch of identical size are considered and the driven patch is fed using the new feed. The gap between them and location of the feed are optimized to achieve a good CP performance. Our single element design has a 3dB AR bandwidth of 17.6% and a gain of more than 8 dBic. A 2 × 2 sequentially rotated array design has a 3dB AR-bandwidth of about 33% and a gain of about 13 dBic. The new feed system is very useful to achieve high gain and wideband CP from a CPSMA array in a spacelimited environment.