| 摘要: |
| 针对移相器带宽受限的问题，设计了一种用于拓展移相器工作带宽的改进型全通网络版图。在传统全通网络版图的基础上引入一个用于调谐全通网络(Allpass Network,APN)中两个电感之间互耦系数的电容，该电容可以作为一个自由设计量，因此该结构可以提升全通网络的设计灵活度。为了验证该设计思路，仿真、加工并测试了两个工作于0.3~2 GHz的GaAs超宽带移相器。测试结果表明，在0.3~2 GHz范围内，两个移相器的移相误差小于4.2%，回波损耗大于14.8 dB。与报道的类似移相器相比，所设计的移相器具有良好的回波损耗、大移相度、宽工作带宽和较低的移相误差等优良特性。 |
| 关键词: 相控阵 数字移相器 全通网络 超宽带 |
| DOI： |
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| 基金项目:复杂电子系统仿真重点实验室基础研究基金（DXZT JC ZZ 2017 005） |
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| An ultra-wideband GaAs phase shifter based on modified all-pass network layout |
| TANG Cong |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| In order to solve the problem of the limited operating bandwidth of phase shifter,a modified layout for all-pass network(APN) is proposed.This structure is also beneficial to improve the design flexibility of the design process since a cross coupled capacitor which functions as a free design parameter is introduced to tune the mutual coupling between the two inductors.For verification,two GaAs phase shifters operating at 0.3~2 GHz are simulated,fabricated and measured.Experimental results show that the root mean square(RMS) phase error is less than 4.2% of the target phase shift,and the return loss is better than 14.8 dB ranging from 0.3 to 2 GHz.Compared with the reported similar phase shifters,the presented circuit shows merits of better return loss,larger phase shift,wider operating bandwidth and less phase error. |
| Key words: phased array digital phase shifter all-pass network(APN) ultra-wideband |
