数字移相器的ADS设计与仿真

Design and Simulation of a Digital Phase Shifter Using ADS

介绍了四位数字移相器的原理、电路设计过程及优化仿真方法。利用射频仿真软件ADS（Advanced Design System）构建了PIN二极管的正反偏模型，讨论了运用ADS的灵敏度分析模块辅助优化移相器关键参数的方法，并基于该方法设计出了一种X波段四位数字移相器，其工作频率为9．5～10．5GHz，相位误差〈2°，各级联位输入回波损耗〈15-dB，插入损耗〈2．5dB。

The principle, process of circuit design and method of optimized simulation of a 4-bit digital phase shifter are presented in this paper. The model of the state of forward bias and reverse bias of PIN diodes is fabricated using RF simulation software ADS （ advanced design system） , and the method of optimizing the key parameter of phase shifter using the sensitivity analysis module of ADS is also discussed. An X-band 4-bit digital phase shifter is designed based on this method. The operating frequency of this phase shifter is 9.5 - 10.5 GHz, the phase shifter accuracy is less than 2°, the return loss is less than 15 dB, and the insertion loss is less than 2.5 dB.