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Single-feed dual-frequency circular microstrip antenna with an open-ring slot

✍ Scribed by Jen-Yea Jan; Kin-Lu Wong

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
144 KB
Volume
22
Category
Article
ISSN
0895-2477

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✦ Synopsis

A no¨el dual-frequency design of a single-layer, single-feed circular microstrip antenna with an open-ring slot s demonstrated. The open-ring slot is embedded close to the boundary of the circular patch, and has a small spacing between the two open ends of the slot. By selecting suitable widths of the open-ring slot, a dual-frequency operation

with its two operating frequencies ha¨ing similar broadside radiation patterns, the same polarization planes, and small antenna-gain differences can be obtained. The frequency ratio between the two frequencies within a range of about 1.23᎐1.32 has also been obtained. Details of the antenna design and experimental results for the dual-frequency performances are presented.

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