圆波导TE_(21)模跟踪网络的研究  

Research and desgin of circular waveguide TE_(21)-mode coupler

作　　者：赫英毅[1] 佘川飞[1] 唐先发[1] 李彪[1] 何晓英[2] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]中国电子科技集团公司第29研究所,四川成都610036

出　　处：《信息与电子工程》2011年第4期458-461,466,共5页information and electronic engineering

摘　　要：以耦合波理论为基础,在考虑了圆波导壁厚对耦合的影响以及耦合小孔间相互影响的情况下,设计出相应的TE21模耦合器结构和耦合器样机。样机实测特性指标与数值计算结果吻合,在f0±0.3 GHz范围内,耦合度小于2 dB(单臂小于8 dB),抑制度大于40 dB,达到预期的技术要求。The TE21-mode tracking coupler is used in a geostationary satellite auto-tracking and transmitting feed antenna. Based on the coupling wave theory, the diameter of each coupling hole is re-calculated according to the voltage coupling formula of small hole to counter the negative effects of wall thickness on TE21-mode coupling. On the basis of analysis and numeric simulation, one 8-arm TE21-mode coupler with 20-hole array is designed and its prototype is fabricated. A good agreement between theoretical and experimental results confirms the validity and the accuracy of the system design. Within f0 ＋ 0.3 GHz range interested, the coupling of TE21 mode is less than 2 dB（8 dB in 8-arm） and the isolation of TEll mode is greater than 40 dB, which is up to the expected indexes.

关 键 词：TE21模耦合器 壁厚 自跟踪 耦合孔 

分 类 号：TN814[电子电信—信息与通信工程]