宽频带四端口馈源网络系统设计  

Design of Broadband 4-port Feed Network System

作　　者：王进[1] 杜彪[1] 焦永昌[2] 解磊[1,2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,石家庄050081 [2]西安电子科技大学天线与微波技术重点实验室,西安710071

出　　处：《电子与信息学报》2017年第6期1313-1318,共6页Journal of Electronics & Information Technology

基　　金：国家重点基础研究发展计划(2013CB837902);国家自然科学基金(11261140641)~~

摘　　要：展宽现有卫星通信频段的带宽是增大通信容量的有效途径之一。为将C波段通信接收频段带宽展宽为3.625~4.800 GHz,发射频段展宽为5.850~7.025 GHz,该文设计了一种宽频带、结构紧凑、双线极化四端口馈源网络系统,通过采用宽带正交模耦合器与E面侧壁耦合T-接头宽带频率双工器,拓宽了馈源网络的工作带宽,由于该工作频带超过了标准波导的工作带宽,网络各部件的设计采取了非标波导,该文设计了八边形过渡波导解决了系统各部件在整个频带内的匹配问题。研发和测试了该馈源网络系统,测试与仿真结果吻合良好。实测结果表明,所有端口电压驻波比小于1.35,插入损耗小于0.5 dB,收发隔离度大于95 dB。With the development of satellite communication technology, the demand for communication capacity is increasing. Broadening existing communication bandwidth is a key technology of satellite communication antenna. In order to extend the C band satellite communication, covering the receiving band 3.625-4.800 GHz and the transmitting band 5.850-7.025 GHz, a compact broadband four-port dual linear polarization feed network is designed. The broadband characteristics are achieved by employing a broadband orthomode transducer and two identical E-plane side coupling T-junction duplexers. The extended C band exceeds the bandwidth of a standard rectangular waveguide, so an octave bandwidth concept for compact waveguide transitions based on the use of octagonal-shaped sections is presented. A prototype of the feed network is developed. Simulated and measured results show good agreements. Measurements show that, this compact 4-port network provides Voltage Standing Wave Ratio （VSWR） better than 1.35 in all ports, insertion losses less than 0.5 dB, isolation Tx/Rx greater than 95 dB.

关 键 词：卫星通信 馈源网络 正交模耦合器 双工器 双线极化 

分 类 号：TN927[电子电信—通信与信息系统] TN823[电子电信—信息与通信工程]