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Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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WIDEBAND CIRCULARLY POLARIZED SQUARE SLOT ARRAY FED BY SLOTTED WAVEGUIDE FOR SATELLITE COMMUNICATION

By M. Wang, L. Hu, J. Chen, S. Qi, and W. Wu

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Abstract:
A wideband circularly polarized (CP) slot array with high radiation efficiency is proposed. The cavity-backed square slots are designed to achieve wideband CP radiation with a unidirectional pattern. The slotted waveguide is adopted to feed the array with high efficiency. The square slot, cavity and feeding slot in the waveguide can be viewed as a radiating element. A CP slot array can be conveniently designed as traditional waveguide slot arrays, once the element admittance characteristic is determined. A 1-by-8 CP array operating at 12.5 GHz has been developed. Measured impedance bandwidth of 6.9%, axial-ratio (AR) bandwidth of 8.8% and a gain of 15.4 dBi have been achieved. This array can be conveniently expanded to a larger wideband CP array with a higher gain, which is preferred for the specific satellite communication applications.

Citation:
M. Wang, L. Hu, J. Chen, S. Qi, and W. Wu, "Wideband Circularly Polarized Square Slot Array Fed by Slotted Waveguide for Satellite Communication," Progress In Electromagnetics Research Letters, Vol. 61, 111-118, 2016.
doi:10.2528/PIERL16030603

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