Differential phase shifters using corrugated, ridge, and fin loaded waveguides

✍ Scribed by Angel Mediavilla; José A. Pereda; Oscar González; Alicia Casanueva; Joseph Helszajn; Ralph Levy

• Book ID: 102512321
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 289 KB
• Volume: 19
• Category: Article
• ISSN: 1096-4290
• DOI: 10.1002/mmce.20378

✦ Synopsis

One means of converting the port conditions of a magic-tee into those of a 908 hybrid is to introduce external sections of waveguide at the symmetrical H-plane output ports having the necessary 908 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 628 over a 20% bandwidth in WR75 waveguide with a return loss of better than 40 dB and an insertion loss <0.06 dB. V