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Microstrip-line-fed printed shorted ring-slot antennas for circular polarization

✍ Scribed by Wen-Shan Chen; Chien-Chin Huang; Kin-Lu Wong

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
141 KB
Volume
31
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Designs of circularly polarized printed shorted annual and square ring‐slot antennas are proposed. Circular polarization (CP) radiation of the shorted ring‐slot antennas is achieved by selecting a proper length of the shorted section in the ring slot, which is about 3.9 and 8% of the mean circumference of annular and square ring slots, respectively, and feeding the ring slot using a microstrip line 90° to the shorted section. Prototypes of the proposed designs have been implemented. Experimental results show that good CP radiation performances are observed, and the 3 dB axial‐ratio CP bandwidths obtained for the annular and square ring‐slot antennas can reach about 8.4 and 8.1%, respectively. Details of the proposed CP designs and obtained experimental results are presented and discussed. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 137–140, 2001.

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