Study of Q‐factors of ridge and groove gap waveguide resonators. Issue 11 (1st August 2013)

• Record Type: Journal Article
• Authors: Pucci, Elena; Zaman, Ashraf Uz; Rajo‐Iglesias, Eva; Kildal, Per‐Simon; Kishk, Ahmed
• Is Part Of: IET microwaves, antennas & propagation. Volume 7:Issue 11(2013)
• Page Start: 900
• Page End: 908
• Publication Date: 2013-08-01
• Subjects: conductors (electric) -- magnetic circuits -- magnetic devices -- magnetic leakage -- millimetre wave circuits -- Q‐factor measurement -- ridge waveguides -- millimetre wave resonators; Q‐factor -- ridge gap waveguide resonator -- groove gap waveguide resonator -- millimeter wave application -- parallel plate cut‐off generation -- artificial magnetic conductor -- AMC -- metallic plate -- wave propagation -- metallic pin surface texture -- rectangular waveguide -- leakage loss; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2013.0081
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : The gap waveguide technology for millimeter waves applications has been recently presented. The new structure is made by generating a parallel plate cut‐off region between an artificial magnetic conductor (AMC) and a metallic plate. Propagating waves will be only allowed to follow a metal ridge or groove surrounded by the AMC. The gap waveguide can be made of only metal and does not need any contact between the metal joints compared to standard waveguides. In this study, a study of Q ‐factors of resonators made in ridge and groove gap waveguides are presented. The resonators are made of copper and the AMC used is a textured surface of metallic pins. Simulated and measured unloaded Q s are presented and compared with Q of a standard rectangular waveguide. High Q ‐factors are measured for the prototypes presented, approaching 90–96% of the simulated values. Furthermore, it is shown how the lid of pins can easily stop the leakage loss at the joints of the circuit, which is the typical cause of reduced Q ‐factor of standard waveguides at high frequency.