Title :
A Balanced Digital Phase Shifter by a Novel Switching-Mode Topology
Author :
Yun-Wei Lin ; Yi-Chieh Chou ; Chi-Yang Chang
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
Abstract :
A balanced digital phase shifter by a novel switching-mode topology is proposed. A 3-bit balanced digital phase shifter is given as an example, the working bandwidth of which is from 2.3 to 2.7 GHz. The proposed 3-bit balanced phase shifter comprises two balanced loaded-line phase shifters (90° and 45°) and six twist-line broadband 180° phase shifters. The balanced loaded-line digital phase shifter changes phases while the even- or odd-mode signal is excited. The 180° phase shifter controls the balanced signal to be even or odd mode. The commensurate transmission line filter is used as the biasing circuit.
Keywords :
network topology; phase shifters; balanced digital phase shifter; bandwidth 2.3 GHz to 2.7 GHz; biasing circuit; switching-mode topology; twist-line broadband phase shifters; Balanced digital phase shifter; broadband 180$ ^{circ}$ digital phase shifter; loaded-line phase shifter; switching mode; twist-line;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2013.2258170
