短接贴片加载的双频圆极化卫星导航天线OA北大核心CSTPCD

A compact patch antenna with dual-coupled shorted patch loading for the dual-band global positioning system(GPS)is introduced to reduce the complexity and cost of the design of dual-band circularly polarized antenna.The shorted patch loading technique is employed in the antenna,so the overall dimensions of the antenna is only 42 mm×42 mm×9 mm,and the ultra-low-cost PPO plastic is utilized instead of the substrates with high dielectric constants,so as to achieve the cost reduction.The proposed compact dual-coupled shorted patch loading technique enables the antenna to resonate at the L1/L2 GPS frequency bands.At these bands,the antenna demonstrates good performance in the presence of a ground plane.Its circularly polarized radiation gains reach 3.12 dBic at the L2 band and 4.08 dBic at the L1 band,which indicates high gain performance.Additionally,the 3 dB gain bandwidths of the antenna at the two frequency bands are 31 MHz and 43 MHz,respectively.Therefore,the proposed antenna not only possesses the characteristics of low cost,dual-band and compactness,but also exhibits good performance at the L1/L2 GPS frequency bands,so it is an ideal patch antenna.The design and fabrication of the antenna are of great significance for the GPS application,and can meet the antenna demands of low cost and high performance.