中图分类号： TN432 文献标识码： A DOI： 10.19358/j.issn.2096-5133.2021.05.012 引用格式： 夏小辉，林福江. 一种高耐压SPST天线调谐开关设计[J].信息技术与网络安全，2021，40(5)：68-73.
Design of a high voltage handling SPST antenna tuning switch
Xia Xiaohui，Lin Fujiang
(School of Microelectronics，University of Science and Technology of China，Hefei 230026，China)
Abstract： This paper presents a high voltage single pole single throw antenna tuning switch, which is used for Sub-6 GHz antenna aperture tuning, impedance tuning and broadband switch. The design adopts series-parallel and adaptive bias structure of the body region, taking into account the insertion loss and isolation degree; In addition, based on the traditional stacking structure, the size of transistors at all levels is not uniform, which greatly improves the ability of the switch parallel branch to withstand voltage.And by using a two-stage bias network, the leakage of gate end and body end is reduced, and the parasitic capacitance unequal effect is weakened in the off state, thus the tolerance of branch voltage is improved. The circuit design is based on 130 nm SOI CMOS process. Simulation results show that frequency range is 0.1 to 5.0 GHz, the on-off resistance is less than 2 Ω, the turn-off capacitance is less than 150 fF, the insertion loss is 0.14~0.48 dB, the isolation is more than 30 dB, and the voltage handling is more than 60 V.
Key words : SPST antenna tuning switch；asymmetric stacked structure；two-stage offset network；high voltage handling
