Single-layer Linear-to-Circular Polarization Transformer Based on Periodic Strips Array

In this paper, single-layer linear-to-circular polarization transformer is proposed, which is composed of 3×3 metallic strips array. Firstly, the novel approach of “fission transmission of EM waves” based on the sequence of incident and transmission waves product cause additional transmission of orthogonal components. The axial ratio is less than 1.0 dB and accumulative axial ratio bandwidth of 17.05% is achieved at four frequency bands ranging from 12-18GHz for circular polarization. Theoretical analysis and microwave experiments are presented to validate the performance of the structure. While the measured results are in good agreement with simulation.

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