S波段16 dB衰减器设计

Design of a 16-dB S-Band Attenuator

摘要: 本文设计并制作了一款适用于S波段的高线性16 dB衰减器，该衰减器由四个PIN二极管组成的两组单刀双掷开关和一个16 dB衰减芯片组成，通过控制电压实现直通与衰减支路的切换。经测试在频带2~3 GHz内，.6 dB，且两端口回波损耗小于−20 dB，测试结果与仿真吻合度较高。由于结构紧凑，该电路可作为大波动小于0.3 dB，插入损耗约为0动态范围衰减器的基本单元。

Abstract: In this paper, an attenuator with high linearity is designed for S-band applications. The proposed module consists of a 16 dB chip attenuator and two single-pole double-throw switches using four PIN diodes. The direct paths or attenuated branch can be controlled flexibly through digital signal. The presented device shows an insertion loss of 0.6 dB, and an ultra-low fluctuation of 0.3 dB in the frequency range of 2~3 GHz. Also, the return losses of the input and output ports are better than −20 dB. The measured and simulated results show good agreement. The designed circuit can be acted as a candidate of the basic unit for the realization of broaden-dynamic range attenuators due to its compact structure.