Ka波段反射式模拟移相器设计  

Design of Ka-band Reflection-type Analog Phase Shifter

作　　者：白维达 张德伟 邓海林 张毅[1] 吕大龙 

机构地区：[1]信息工程大学信息系统工程学院,郑州450002

出　　处：《现代雷达》2017年第6期58-61,共4页Modern Radar

基　　金：核高基国家重点科技专业资助项目

摘　　要：相比于数字移相器,模拟移相器具有可以进行连续相位调制的优势。文中设计了一种工作于Ka波段的反射式模拟电调移相器,该电路利用变容二极管与四分之一波长微带线组成的π型支路和阻抗变换定向耦合器拓展了移相范围,并利用补偿电阻平衡了插入损耗波动。测试结果表明:在29 GHz^31 GHz频段,该移相器可以获得180°左右的相移量,在中心频率30 GHz处,插入损耗波动小于0.4 d B,且线性度优于±2%。Analog phase shifter has the advantage over digital phase shifter that it can adjust phase shift continuously. In this pa- per, a reflection type analog phase shifter working in Ka-band is designed. H-type network consists of varactor diodes and λ/4 mi- crowave strip and an impedance-transforming 3 dB 90° hybrid are used to expand phase shift. To minimize the typical large inser- tion-loss variation of the phase shifter, a resistor Rp in parallel with each varactor is put. Measurement results show that the devel- oped phase shifter provides 180° continuous phase shift over the frequency range of 29 GHz -31 GHz. The insertion loss at 30 GHz is 5.3 dB ± 0.2 dB and the linearity of the phase shifter is better than ±2 %.

关 键 词：移相器 反射式 插入损耗波动 阻抗变换定向耦合器 

分 类 号：TN623[电子电信—电路与系统]