UNIFIED SOLUTIONS OF THE SCATTERING COEFFICIENTS OF E-PLANE JUNCTIONSIN RECTANGULAR WAVE-GUIDES

In this paper, the scattering coefficients of the E-plane right-angle bend, T junction, and cross junction in a rectangular waveguide are de rived by the mode-matching method [12]. In this method, the electromag netic fields in the junction section formed by a sectoral or a circula r region are matched to those in the waveguide region. Since the T jun ction and the cross junction can be constructed with several right-ang le bends, their scattering coefficient solutions can be unified in the sane form as those of the right-angle bend. The expressions for these solutions are simple, convenient, and the numerical values are highly accurate over a wide frequency range. By using these values, the deta ils of the scattering characteristics of the dominant and higher-order modes at the junction can be obtained. The resonance phenomena of the dominant and the higher-order modes in the high-frequency range are i mportant for the study of the fundamental characteristics of the micro wave circuits.