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In this paper, we propose a design approach for auxiliary antennas aimed at mitigating multi\u2010interference challenges within satellite communication earth stations. We introduce an eight\u2010element auxiliary antenna with an elliptical beam comprising dual radiation patches and a T\u2010shaped 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\u00a0GHz, the antenna exhibits a 3\u2010dB beam spacing of 38\u00b0 and an azimuthal width of 162\u00b0, with a maximum gain of 7.9\u00a0dBi. 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\u2009dB under all circumstances.<\/jats:p>","DOI":"10.1002\/sat.1512","type":"journal-article","created":{"date-parts":[[2024,4,2]],"date-time":"2024-04-02T14:10:18Z","timestamp":1712067018000},"page":"273-285","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A novel optimization method for attenuating multi\u2010interferences in satellite communication earth station"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"http:\/\/orcid.org\/0000-0002-1121-2389","authenticated-orcid":false,"given":"Kang","family":"Luo","sequence":"first","affiliation":[{"name":"National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan 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