V-Band High-Selectivity Circular-Polarized Filtering Antenna Based on SIW Filtering Feeding Scheme

Le résumé fourni par la source

This paper presents a high-selectivity circular-polarized (CP) filtering antenna operating in the 60 GHz band. The proposed antenna consists of a substrate-integrated waveguide (SIW) filtering feeding structure and a uniquely designed CP radiator. The feeding structure, independent of the resonator cavity, comprises a trisection stepped SIW and a uniform SIW, generating three radiation nulls to sharpen selectivity. The CP radiator consists of an arrow-shaped patch, a pair of arch-shaped patches, and a circular cavity, ensuring good CP radiation performance. Simulation results indicate that the proposed CP filtering antenna exhibits a passband ranging from 57.6 to 61.8 GHz, with an average in-band realized gain of approximately 9.7 dBic. The suppression levels in the lower and upper stopbands exceed 18 dB and 20 dB, respectively. These characteristics make the proposed CP filtering antenna a strong candidate for 60 GHz millimeter-wave system applications.

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