Advances in Engineering Advances in Engineering features breaking research judged by Advances in Engineering advisory team to be of key importance in the Engineering field. Papers are selected from over 10,000 published each week from most peer reviewed journals.
Analog Integrated Circuits and Signal Processing, March 2014.
Chunyuan Zhou, Lei Zhang, Yan Wang, Zhiping Yu, He Qian.
Institute of Microelectronics, Tsinghua University, Beijing, 100084, China.
Abstract
A 4-bit active phase shifter for millimeter-wave phased arrays is presented in this brief. The proposed phase shifter has achieved a phase-shifting range of 360∘ with a 22.5∘ resolution over 40 to 50-GHz. Thanks to the careful dimension designs of digitally controlled gain stage in the programmable weighted combiner, the active phase shifter achieves root-mean-square phase and gain errors of 5∘and 1.25-dB at 45-GHz, respectively. The measurement results also show that the input and output return losses are better than 7-dB from 40 to 50-GHz. The whole chip dissipates only 10.7-mA from 1.2-V supply excluding output driven buffer.
