带状注行波管E面和H面宽带耦合器  

Two novel broadband couplers in W band for sheet beam travelling wave tube

作　　者：杨利亚[1] 王建勋[1] 姚叶雷 刘国[1] 舒国响 郑源[1] 罗勇[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054

出　　处：《强激光与粒子束》2015年第12期109-113,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(G0501040161101040)

摘　　要：设计和分析了应用于W波段带状注行波管的E面多孔输入输出耦合器和H面多孔输入输出耦合器。研究表明,采用多孔耦合,不仅可以实现电磁场与电子注的汇聚和分离,还可以实现极宽工作带宽。HFSS仿真分析结果表明:E面多孔定向耦合器1dB相对带宽达43GHz,且隔离度优于20dB的相对带宽达到40GHz;H面定向耦合器在E面耦合器的10个耦合孔数的基础上,通过增加2个耦合孔数,1dB相对带宽提升到30GHz,且隔离度大于15dB的相对带宽达到32GHz。两种新型耦合器在极宽的工作带宽内实现低反射、高隔离的性能。与E面耦合器相比,H面耦合器易于加工和利于与周期永久磁体的封装集成。Two input/output couplers consisting of multiple apertures in E plane and H plane are designed and analyzed for a W-band broadband sheet beam traveling wave tube （TWT）. Multi-apertures are adopted in the couplers to separate the electro- magnetic field from the beam and extend the operating bandwidth. Simulation results optimized by HFSS indicate that the E-plane coupler can achieve a 1 dB transmission bandwidth of 45.3 % and a --20 dB isolation bandwidth of 34.7 % respectively. Similar results are obtained by. adding two more apertures for the H-plane coupler, specifically, the 1 dB relative bandwidth and the port isolation under --15 dB can get improved to 45.3% and 30.6%respectively. Both novel couplers can achieve high isolation and low reflection in extreme broad bandwidth. In comparison with the E plane coupler, the H plane structure is easy to fabricate, cool and integrate with periodic permanent magnet in compact dimensions.

关 键 词：带状注行波管 宽带定向耦合器 E面耦合 H面耦合 

分 类 号：TN124[电子电信—物理电子学]