Design of circularly polarized annular-ring slot antennas fed by a double-bent microstripline

Jia Yi Sze, Chung I.G. Hsu, Min Hua Ho, Yu He Ou, Ming Ting Wu

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A novel design of a circularly polarized annular-ring slot antenna is discussed. The circular polarization is attained through a newly proposed double-bent microstripline that feeds the antenna at two different positions. Several structural parameters were experimentally studied with care to establish a design procedure, which was subsequently drawn into a design flow chart. Validation was carried out using the antennas designed at 3.5 and 1.59 GHz. The measured 3-dB axial-ratio bandwidth (ARBW) for the former is 10.5% and for the latter, 10.0%, which is larger than the 8.5% 3-dB ARBW required by an Inmarsat application.

Original languageEnglish
Pages (from-to)3134-3139
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Issue number11 II
Publication statusPublished - 2007 Nov 1


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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