Compact circularly polarized truncated square ring slot antenna with suppressed higher resonances.

Compact circularly polarized truncated square ring slot antenna with suppressed higher resonances.

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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 moondrop quarks 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 click here 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.