A 6-bit CMOS Active Phase Shifter for Ku-Band Phased Arrays

被引:48
|
作者
Duan, Zongming [1 ]
Wang, Yan [2 ]
Lv, Wei [2 ]
Dai, Yuefei [2 ]
Lin, Fujiang [1 ]
机构
[1] Univ Sci & Technol China, Dept Elect Sci & Technol, Hefei 230026, Anhui, Peoples R China
[2] East China Res Inst Elect Engn, Hefei 230088, Anhui, Peoples R China
关键词
Active phase shifters; CMOS integrated circuits; passive balun; phased arrays; polyphase filter (PPF); X-BAND; SILICON;
D O I
10.1109/LMWC.2018.2837885
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A 6-bit high-accuracy active phase shifter is developed in 0.13-mu m CMOS technology for Ku-band phased arrays. Improved transformer balun with wriggly stub is applied to split the single input to differential and achieve high balance with reduced chip area. Two-stage polyphase filter (PPF) generates broadband I/Q signals with high accuracy. A main digital-to-analog convertor (DAC) controls the I/Q amplitude to achieve 6-bit phase resolution, while an auxiliary DAC compensates the amplitude/phase error introduced by balun and PPF. Consequently, high resolution along with low phase/gain error can be achieved. The phase shifter shows measured rms phase error of <4 degrees at 12-18 GHz and <3 degrees at 13-18 GHz. The measured mean gain is -2.5-1 dB, and the rms gain error is <0.9 dB at 12-18 GHz. The total power consumption is 37.5 mW, and chip size is 0.75 x 0.32 mm(2) excluding pads.
引用
收藏
页码:615 / 617
页数:3
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