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Published on: March 23, 2017
Compact circularly polarized truncated square ring slot antenna with suppressed higher resonances
Mursyidul Idzam Sabran1, Sharul Kamal Abdul Rahim1, Chee Yen Leow1
1Wireless Communication Centre, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia.
Abstract:
This paper presents a compact circularly polarized (CP) antenna with an integrated higher order harmonic rejection filter. The proposed design operates within the ISM band of 2.32 GHz- 2.63 GHz and is suitable for example for wireless power transfer applications. Asymmetrical truncated edges on a square ring create a defected ground structure to excite the CP property, simultaneously realizing compactness. It offers a 50.5% reduced patch area compared to a conventional design. Novel stubs and slot shapes are integrated in the transmission line to reduce higher (up to the third) order harmonics. The proposed prototype yields a -10 dB reflection coefficient (S11) impedance bandwidth of 12.53%, a 3 dB axial ratio bandwidth of 3.27%, and a gain of 5.64 dBi. Measurements also show good agreement with simulations.
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