Design of Inline Coaxial Probe to RGW Transition in Ku and K Band

Abstract

The guiding structure which is to be considered for high frequency applications is Gap waveguide. Because of its numerous merits, this technology has become an astounding attraction to many investigators. Limited bandwidth is one of major issue for designing the transition. This paper discusses an Inline transition between coaxial probe to Ridge gap waveguide in Ku and K band using Ansoft HFSS software. Using a simple inline coaxial probe transition a dual band characteristics has been observed with a bandwidth of 200 MHz. A modified L shape transition has been designed which shows 5GHz bandwidth with an overall return loss higher than 15dB and comparatively lower insertion less having magnitude less than 0.9dB been observed. In addition field distribution has been discussed.