10~18 GHz高精度单片数控移相器设计  

Design of 10~18 GHz high⁃precision monolithic digital phase shifter

作　　者：周宏健 蒋乐 李光超 周睿涛 ZHOU Hongjian;JIANG Le;LI Guangchao;ZHOU Ruitao(China Key System&Integrated Circuit Co.,Ltd.,Wuxi 214000,China)

机构地区：[1]中科芯集成电路有限公司,江苏无锡214000

出　　处：《电子设计工程》2024年第9期61-65,共5页Electronic Design Engineering

摘　　要：设计了一款10~18 GHz高精度单片6 bit数控移相器芯片,采用的电路结构融合了全通滤波器(APF)、高通滤波器(HPF)和低通滤波器(LPF)型移相结构。采用多个全通滤波器级联的移相结构可以在宽带内实现精准的相位偏移量,但电路结构比较复杂。该设计通过两种方式改进级联全通滤波器型移相结构,一是采用全通-高通网络替代全通网络,二是采用低通网络替代全通网络,可以在保持高移相精度的同时减少电路元件数量,缩小芯片尺寸。使用0.25μm GaAs PHEMT工艺制造移相器芯片,内部集成六位并行驱动器,芯片尺寸为2.7 mm×1.4 mm,测试得到10~18 GHz频段内移相精度(RMS)为2°。A 10~18 GHz high⁃precision monolithic 6 bit digital phase shifter using a combination of All⁃Pass Filters(APF),High⁃Pass Filters(HPF),and Low⁃Pass Filters(LPF)is demonstrated.An exact phaseshift can be achieved by cascading several all⁃pass filters,which leads to a complex circuit structure.This paper presents two ways to improve the cascade structure.The first is to use a APF-HPF structure instead of cascade APFs,and the second is to use cascade LPFs,so as to reduce the size of the chip while maintaining high phase⁃shifting precision.The proposed phase shifter,fabricated using a 0.25μm GaAs PHEMT process,integrates parallel drivers.The chip size of this monolithic digital phase shifter is 2.7 mm×1.4 mm.The test results show that the phase deviation(RMS)is 2°over 10~18 GHz bandwidth.

关 键 词：宽带 高精度 砷化镓 数控移相器 全通滤波器 

分 类 号：TN715[电子电信—电路与系统]