Dual-frequency broadband wide-angle circularly polarized gate based on miniaturized unit

• Main Authors: ZHAO MINGHUA, SONG KAIJUN, ZHANG BO, FAN YONG, JING SHOUZHAO, CHEN QIKE, HE ZONGRUI, CHENG YUJIAN, LIU NANFENG, ZHANG YONGHONG, WANG HONGBIN, LIN XIANQI
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2020
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention belongs to the technical field of satellite communication, and particularly relates to a dual-frequency broadband wide-angle circularly polarized gate based on a miniaturized unit. The dual-frequency broadband wide-angle circularly polarized gate effectively solves the problem of poor incident angle stability of the dual-frequency circularly polarized gate on the premise of ensuringbroadband and low insertion loss, and is especially suitable for a double-frequency scanning circular polarization satellite communication system with large capacity, low loss and high incident anglestability. According to the invention, a composite structure of short microstrip lines and metal wire grids is fully utilized, so that the cross polarization inhibition capability can be greatly enhanced, the bandwidth is easy to expand, and the insertion loss is easy to reduce; meanwhile, four short branches are loaded at the tail ends of the I-shaped short microstrip line to form a deformed I-shaped short microstrip line