A novel optimization method for attenuating multi-interferences in satellite communication earth station

The study of multi-interferences plays a pivotal role in advancing the development of next-generation, high-performance communication devices. In this paper, we propose a design approach for auxiliary antennas aimed at mitigating multi-interference challenges within satellite communication earth stations. We introduce an eight-element auxiliary antenna with an elliptical beam comprising dual radiation patches and a T-shaped power divider, to attenuate interferences originating from three distinct directions. To enhance the azimuthal beamwidth, we adjust the dimensions of the ground plane and extend the substrate. At a frequency of 12.5 GHz, the antenna exhibits a 3-dB beam spacing of 38° and an azimuthal width of 162°, with a maximum gain of 7.9 dBi. We employ a sidelobe canceller to optimize the antenna's performance, and both simulations and measurements affirm that the auxiliary antenna achieves an extinction interference cancelation ratio exceeding 27 dB under all circumstances.