大功率超宽带高平坦度定向耦合器设计  

Design of Directional Coupler with High Power,Ultra-wideband and High Flatness

作　　者：张大伟 昌建军[2] 王慧丽[1] 张峰平[1] ZHANG Dawei;CHANG Jianjun;WANG Huili;ZHANG Fengping(The 9th Research Institute of CETC,Mianyang 621000,China;Nanjing Research Institute of Electronic Technology,Nanjing 210039,China)

机构地区：[1]中国电子科技集团公司第九研究所,四川绵阳621000 [2]南京电子技术研究所,江苏南京210039

出　　处：《舰船电子对抗》2024年第3期103-108,共6页Shipboard Electronic Countermeasure

摘　　要：宽带大功率射频发射系统中的保护电路需要实时采集准确的射频信号。宽带大功率耦合器作为保护电路的关键器件,其耦合度的平坦度、方向度指标对保护电路采集射频信号的准确性起到关键影响。采用同轴结构的定向耦合器具备极小的插入损耗,在接入射频通路后对通过功率影响极小。通过在拟合网络中采用传输线变压器谐振回路实现宽带高平坦度定向耦合。实测结果表明在80 MHz~1000 MHz频段的5000 W以上量级的大功率定向耦合器中,其耦合度为50 dB时,平坦度≤±0.3 dB,方向度>20 dB,耦合端口电压驻波比(VSWR)≤1.25,主通路插入损耗≤0.1 dB,主通路VSWR≤1.10。The protection circuit in wideband high-power radio frequency(RF)transmission systems requires accurate RF signals collected in real time.The wideband high-power coupler,as the key device of the protection circuit,coupling s its flatness and directionality play a key role in the accuracy of the RF signal collected by the protection circuit.The directional coupler with coaxial structure has minimal insertion loss,and has minimal influence on the passing power after accessing the RF channel.Broadband high flatness directional coupling is realized by using a transmission-transformer resonant loop in the fitted network.The measured results show that,in the high-power directional coupler above 5000 W in 80~1000 MHz band,when the coupling is 50 dB,the flatness≤±0.3 dB,and the directionality>20 dB,as well as the voltage standing wave ratio(VSWR)of the coupling port≤1.25 and the insertion loss of the main channel≤0.1 dB.The main channel VSWR≤1.10.

关 键 词：定向耦合器 耦合度 平坦度 保护电路 方向度 传输线变压器 

分 类 号：TN622[电子电信—电路与系统]