Unidirectional circularly-polarized slot antennas with broadband operation

Tuan Yung Han, Yu Yi Chu, Lin Yu Tseng, Jeen Sheen Row

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


A circularly-polarized (CP) slot antenna comprises of a triangular wide slot, a director patch, and a metallic reflector is proposed and studied in this paper. The CP radiation of the slot antenna is excited by the proximity coupling of an L-shaped strip. To obtain an optimum peak gain and a broad CP bandwidth, the effects of varying the positions of the director and reflector on the antenna performances are respectively investigated. Several prototypes were constructed, and the measured results show that the proposed antenna can provide an average gain of 10 dBi within a CP operating bandwidth of 23% and a front-to-back ratio of over 10 dB. Simulation analyses are also carried out to validate the experimental results.

Original languageEnglish
Pages (from-to)1777-1780
Number of pages4
JournalIEEE Transactions on Antennas and Propagation
Issue number6
Publication statusPublished - 2008 Jun 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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