一种Q波段多孔耦合型定向耦合器  

A Q-Band Directional Coupler Based on Multi-hole Coupling

作　　者：陈卯蒸[1,3] 杨欢 马军 覃律[2] 王凯 CHEN Mao-zheng;YANG Huan;MA Jun;QIN Lv;WANG Kai(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;The 39th Research Institute of China Electronic Technology Corporation,Xi'an 710065,China;Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China)

机构地区：[1]中国科学院新疆天文台,乌鲁木齐830011 [2]中国电子科技集团公司第三十九研究所,西安710065 [3]新疆微波技术重点实验室,乌鲁木齐830011

出　　处：《微波学报》2020年第5期74-77,82,共5页Journal of Microwaves

基　　金：国家重点研发计划(2018YFA0404703,2018YFA0404704);国家自然科学基金(11973078)。

摘　　要：论述了一种宽带多孔耦合型定向耦合器,工作频段中心频率为40 GHz,相对带宽50%,拟用于射电望远镜Q波段接收机系统。该定向耦合器为一款结构紧凑的器件,采用对称的等间距多孔耦合形式,将主通道圆波导TE11模式信号耦合到耦合通道的矩形波导中,实现了小于-20 dB耦合特性。为了对设计进行验证,对该定向耦合器进行了加工和测试。测试结果表明,在30~50 GHz工作频段内,主通道反射系数小于-24.2 dB,且全频段内的端口耦合度保持在-20^-21 dB之间。仿真与测试结果具有较高的吻合度,进一步证实了该设计可用于射电天文望远镜的Q波段接收机系统。This paper describes a wideband directional coupler based on the multi-hole coupling technique,which is prepared for the Q-band receiver system of radio telescope,the center frequency of this directional coupler is 40 GHz,with a relative bandwidth of 50%.This directional coupler has a compact size,adopting a symmetric and uniformly-spaced form of multi-hole coupling.It couples the TE11 mode signal of the main channel circular waveguide to the coupling channel rectangular waveguide,realizing a coupling characteristic of less than-20 dB.To verify the design,a fabrication is manufactured and measured.The measurements show that in the band of 30-50 GHz,the reflection coefficient for the main channel is less than-24.2 dB,and the port coupling coefficient for the full frequency band is between-20 dB and-21 dB.The simulations are in good agreement with the measurements,which further proves the design can be applied to the Q-band receiver system of radio telescope.

关 键 词：射电天文 Q波段 宽带 定向耦合器 多孔耦合 

分 类 号：TN622[电子电信—电路与系统]