Novel design for differential phase shifter structure by using multi‐section coupled lines. Issue 11 (1st May 2020)

• Record Type: Journal Article
• Authors: Geyikoglu, M.D.; Koc Polat, H.; Cavusoglu, B.
• Is Part Of: Electronics letters. Volume 56:Issue 11(2020)
• Page Start: 553
• Page End: 556
• Publication Date: 2020-05-01
• Subjects: UHF phase shifters -- S‐parameters -- hyperthermia -- array signal processing; multisection coupled line structure -- transmission line analysis -- reference line -- phase deviation -- full‐wave electromagnetic simulator computer simulation technology -- wideband differential phase shifter -- S‐parameter circuit equations -- even‐odd mode -- hyperthermia application -- frequency 2.2 GHz to 2.7 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2020.0316
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : In this Letter, a new wideband differential phase shifter is proposed by using a multi‐section coupled line structure. S ‐parameter circuit equations and design parameters are calculated using even/odd mode and transmission line analysis techniques for a set of phase shifters (from 0 to 90 with a step of 10°) of the proposed device. The proposed form is the first work that adds multi‐section structures on the coupled line to provide any desired phase shift to the same reference line. In addition, for specific applications such as hyperthermia, the beamforming is ensured to be at small angle steps (10°) to focus the signal to the correct spot. The device is modelled with full‐wave electromagnetic simulator Computer Simulation Technology (CST). Ten prototypes of differential phase shifters are designed, manufactured, and tested for the accuracy of simulation results. The simulated and measured results are in good agreement with the theory and show a bandwidth of 20.4%, <2.7 phase deviation, and >1 dB insertion loss across the 2.2–2.7 GHz frequency range.