Reconfigurable slot-coupled microstrip antenna with polarisation diversity

Jeen-Sheen Row, R. H. Chen

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The design of an aperture-coupled microstrip patch antenna whose radiation can be switched between circular polarisation (CP) and linear polarisation (LP) states is presented. For the proposed design, the CP and LP radiations are excited through the couplings of a ring slot and an open-ring slot in the ground plane, respectively. The effects of the key parameters of the proposed design on the CP and LP performances are investigated in details. A prototype that uses a pin diode to reconfigure the coupling slot is implemented and tested. From the obtained results, the prototype has a cross polarisation level of more than 25dB when it is operated at the LP state and an axial ratio of less than 3dB when it is operated at the CP state. Moreover, the two states share a 10dB input impedance bandwidth. Consequently, the proposed reconfigurable microstrip antenna has the feature of polarisation diversity at a fixed frequency band.

Original languageEnglish
Pages (from-to)798-802
Number of pages5
JournalIET Microwaves, Antennas and Propagation
Issue number3
Publication statusPublished - 2007 Jun 11

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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