In the application of phase shifters, phase shifters with filtering characteristics can be employed to select signals at the receiving frequency and achieve stable phase shift values within the phase shift bandwidth. This paper is based on the structure of a transmission line ultra-wideband (UWB) phase shifter and utilizes the principles of filtering phase shift values and the closed-form expression for the phase shift slope to design, simulate (both circuit and electromagnetic), and test a filtering-type UWB phase shifter. The measured center frequency of the designed filtering-type UWB phase shifter is 6.85 GHz, capable of achieving phase shifts of 22.5° (with a phase shift bandwidth of 66.4%), 45° (with a phase shift bandwidth of 103.7%), and 90° (with a phase shift bandwidth of 93%). The results demonstrate that the fabricated filtering-type UWB phase shifter closely aligns with the simulation outcomes, exhibiting characteristics of ultra-wideband performance, filtering capability, and a simple structure, indicating its potential for practical applications.
Key words
ultra-wideband /
phase shifter /
filter /
miniaturization /
short circuits and short branches
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