Ka波段高隔离单刀单掷开关设计  

Design of the Ka-Band High Isolation Single-Pole Single-Throw Switch

作　　者：周勇涛 凡守涛 许春良[2] 魏绍仁 

机构地区：[1]北京遥感设备研究所,北京100854 [2]中国电子科技集团公司第十三研究所,石家庄050051

出　　处：《半导体技术》2016年第8期590-594,共5页Semiconductor Technology

摘　　要：pin二极管具有导通电阻小、响应速度快及截止频率高等特点,在微波控制电路中常用于制作微波开关。基于pin二极管,研究了具有高隔离特性的Ka波段微带型单刀单掷开关。通过采用多级开关芯片统一馈电的新型电路结构,在Ka波段实现了优于90 dB的开关隔离。采用ADS和HFSS软件对设计的电路进行联合仿真,并进行了实物加工。实测结果表明,在设计的频段内(f_0±1 GHz)开关电路的输入和输出回波损耗均不小于10 dB,插入损耗不大于3.5 dB,隔离度不小于90 dB以及开关时间(上升沿和下降沿)不大于2 ns。pin diode is often used to fabricate the microwave switch in the microwave control circuit for its advantages of low on-resistance, fast response speed and high cut-off frequency. A Ka-band microstrip single-pole single-throw（ SPST） switch made by pin diode with high isolation was studied.By using the new circuit structure of multi-stage switch chip with uniform feed,the isolation greater than90 d B was achieved in Ka-band. The joint simulation of the designed circuit was performed with ADS and HFSS software,and the physical process was carried out. The test results show that in the design spectra（ f0± 1 GHz）,the input and output return loss of the switching circuit are not less than 10 d B,the insertion loss is not more than 3. 5 d B,the isolation is not less than 90 d B,and the switch time（ rising and falling time） is not more than 2 ns.

关 键 词：KA波段 PIN开关 高隔离 单刀单掷(SPST)开关 芯片电路 

分 类 号：TM564[电气工程—电器] TN43[电子电信—微电子学与固体电子学]