A Compact Single-Layer Ultra-Wideband Phase Shifter Using Weakly Coupled Lines
Qingxiang Dong,
Yongle Wu,
Yana Zheng,
Weimin Wang,
Yuanan Liu
Affiliations
Qingxiang Dong
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Yana Zheng
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Yuanan Liu
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
This paper presents a novel compact single-layer ultra-wideband phase shifter using weakly coupled lines, which contains a main line and a reference line. The basic equations of this phase shifter are calculated based on the even-odd mode theory. Then, the parameters are determined in the design procedure. A compact ultra-wideband 90° phase shifter is designed, fabricated, and measured for demonstration. The measured results, in good agreement with the EM simulation, show that this phase shifter can provide a wide bandwidth from 1.36 to 4.53 GHz (107.6%) with a phase deviation of only ±5°. Meanwhile, return loss better than 10 dB and insertion loss less than 1.25 dB can be obtained.
