Dielectric-lined rectangular metal waveguide

Abstract

The propagation characteristics of electromagnetic waves in a dielectric-lined rectangular metal waveguide have been studied. The lining on the two side walls (E-plane) together with the air space in between them is considered as a homogeneous equivalent dielectric medium whose equivalent dielectric constant is derived by using electrostatic theory. The theoretical work is based on the fact that LSB and 15M modes can be propagated in a rectangular metal waveguide lined in the two longer sides (H-plane) by dielectric lining. The phase constant, guide wavelength, phase velocity, cut-off frequency, relative intensities, power flow, attenuation Constant and power handling capacity of different LSEmn and LSMmnmodes have 'been determined. Experimental verification of the guide wavelength at 'X ' 'ku' and 'Ka' bands and cut-off frequency are reported.