Open AccessCMOS phase shifter with low phase‐variation VGA for V‐band application and Ku‐band scaled design
Author(s) -
Lee Dongho
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.0405
Subject(s) - phase shift module , video graphics array , ku band , cmos , cascode , phased array , variable gain amplifier , automatic gain control , electronic engineering , phase (matter) , engineering , s band , microwave , materials science , insertion loss , electrical engineering , optoelectronics , amplifier , physics , telecommunications , operational amplifier , quantum mechanics , antenna (radio)
A 90° fine tuning phase shifter design with low insertion phase‐variation a VGA for V‐band phased array systems is presented. The vector‐sum phase shifters require low phase‐variation VGAs with a gain control range of about 10 dB for good digital control performance. The measured data for discrete devices have found that a cascode has 20° better phase variation performance than a common source in the required gain control range at 50 GHz. To demonstrate the design, the Ku‐band scaled phase shifter has been fabricated in 0.13 µm standard CMOS process. It consists of 90°/0° hybrids with lumped elements and two cascode VGAs. The 91° continuous phases with the gain of 2.7 ± 0.9 dB are obtained at 13 GHz.