Comparison of the return loss and axial ratio for circular polarised square patch antenna using two branch and ring coupler feeds

Qing Lu, Alistair Sambell, Zabih Ghassemlooy, Sean Danaher

Research output: Contribution to conferencePaperpeer-review

Abstract

Circular polarised antennas are used in many wireless communication systems where it is necessary to have a wide bandwidth of the return loss and the axial ratio. This paper compares the bandwidth of the above parameters for a circular polarised square patch antenna fed by a two branch coupler and a ring coupler. The design of the two couplers and the patch is initially reviewed. Based on the equivalent circuits of the two couplers and that of the patch the complete antenna is modelled using Microwave Office (AWR) software. The results obtained show that a ring coupler produces a wider bandwidth for the return loss and axial ratio than that obtained by a two branch coupler.
Original languageEnglish
Publication statusPublished - 2010
EventPGNet 2010: The 11th Annual Postgraduate Symposium on The Convergence of Telecommunications, Networking and Broadcasting - Liverpool, UK
Duration: 1 Jan 2010 → …

Conference

ConferencePGNet 2010: The 11th Annual Postgraduate Symposium on The Convergence of Telecommunications, Networking and Broadcasting
Period1/01/10 → …

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