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Differential phase shifters using corrugated, ridge, and fin loaded waveguides
Author(s) -
Mediavilla Angel,
Pereda José A.,
González Oscar,
Casanueva Alicia,
Helszajn Joseph,
Levy Ralph
Publication year - 2009
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20378
Subject(s) - magic tee , differential phase , return loss , capacitive sensing , waveguide , microwave , insertion loss , bandwidth (computing) , physics , optics , phase (matter) , slotted waveguide , materials science , electrical engineering , hybrid coupler , engineering , telecommunications , power dividers and directional couplers , slot antenna , radiation pattern , quantum mechanics , antenna (radio)
One means of converting the port conditions of a magic‐tee into those of a 90° hybrid is to introduce external sections of waveguide at the symmetrical H‐plane output ports having the necessary 90° phase difference. The purpose of this article is to describe a number of realizations of such differential phase shifters (DPS), including an exact synthesis procedure not requiring computer optimization. A typical design consists of a capacitively loaded waveguide for one section and an essentially inductive waveguide for the other. The latter is simply a uniform waveguide of reduced width when compared with that of the capacitive section. An example capacitive ridge DPS exhibits a maximum phase error of ±2° over a 20% bandwidth in WR75 waveguide with a return loss of better than 40 dB and an insertion loss <0.06 dB. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.