Design of a 0.15-2 GHz high-resolution vector-sum broadband phase shifter with controlled programmable attenuators for stochastic cooling system

Liyao Ma; Guangyu Zhu; Junxia Wu; Jia Yin; Yuan Wei; Peilin He; Yongheng Wang; Zishuai Qiu; Jiancheng Yang

doi:10.1063/5.0176593

Design of a 0.15-2 GHz high-resolution vector-sum broadband phase shifter with controlled programmable attenuators for stochastic cooling system

Rev Sci Instrum. 2023 Dec 1;94(12):123303. doi: 10.1063/5.0176593.

Authors

Liyao Ma¹, Guangyu Zhu^{2

3}, Junxia Wu^{2

3}, Jia Yin², Yuan Wei², Peilin He², Yongheng Wang^{2

3}, Zishuai Qiu¹, Jiancheng Yang^{2

3}

Affiliations

¹ College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China.
² Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
³ University of Chinese Academy of Sciences, Beijing 100049, China.

PMID: 38054833
DOI: 10.1063/5.0176593

Abstract

In this paper, a new 0.15-2 GHz broadband phase shifter with 9-bit phase resolution is presented. This broadband digital adjustable phase shifter is implemented by utilizing the signal vector summation technology. The phase shifter consists of one 90° hybrid coupler, two digital attenuators, two 180° hybrid couplers, two microwave switches, and one combiner. By adjusting the attenuation value of the two digital attenuators, the device creates a minimum 0.7° stepped phase shift. In addition, by switching the two microwave switches, a 360° range of phase shift is achieved while almost keeping the amplitude of the phase shifter constant. The measurement results show that the proposed phase shifter achieves a phase resolution of 0.7° while exhibiting an average insertion loss of 9 ± 2 dB and phase unbalance within ±10°. The calculated RMS phase error of the broadband phase shifter is below 5° from 0.15 to 2 GHz.