A Balanced Digital Phase Shifter by a Novel Switching-Mode Topology

作者：Lin Yun Wei^*; Chou Yi Chieh; Chang Chi Yang

来源：IEEE Transactions on Microwave Theory and Techniques, 2013, 61(6): 2361-2370.

DOI：10.1109/TMTT.2013.2258170

• Balanced digital phase shifter
• broadband 180 degrees digital phase shifter
• loaded-line phase shifter
• switching mode
• twist-line

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 degrees and 45 degrees) and six twist-line broadband 180 degrees phase shifters. The balanced loaded-line digital phase shifter changes phases while the even-or odd-mode signal is excited. The 180 degrees phase shifter controls the balanced signal to be even or odd mode. The commensurate transmission line filter is used as the biasing circuit.

• 出版日期2013-6