The Cut-Off Wavelength of Waveguides with Radiating Slot

Abstract

In this paper, the boundary element method @EM) is used to calculate several numberical examples of cur-off wavelength for TE modes in the waveguides, such as dominate TEll in the sectoral waveguide and its slotted antenna, the cut-off wavelengths of dominant modes TEc,, or eH,, in the elliptical waveguide and others have been calculated also. The change of the cut-off wavelengtk versus the slot width, offsetting, wall thickness and the dimensions of the waveguide are discussed. The method and the program are applicable to all infinite long waveguide system with va