Waveguide T-junctions with resonant coupling between sections of different dimensions

Abstract

and yuriy m. penkin Electromagnetic characteristics of the E-plane T-junction for two rectangular waveguides using resonant coupling between the waveguide sections were studied by mathematical modeling. The problem of coupling between infinite and semi-infinite rectangular waveguides through a resonant slot in the end-wall of the semi-infinite waveguide in the presence of resonant monopole is solved in a strict electrodynamic formulation. The monopole with variable surface impedance is placed parallel to the narrow walls at an arbitrary position inside the infinite waveguide. The problem is solved analytically by the generalized method of induced electro-magneto-motive forces. Impedance vibrator inclusions with variable electro-physical parameters have been analyzed as control elements for waveguide junctions. To this purpose energy characteristics of the junction in the single-mode regime of the both waveguides, and also in multi-mode regime of the semi-infinite waveguide is investigated. The results may be useful for development of variety antennas and waveguide devices, which involves waveguide junctions.

Radiation of Electromagnetic Waves by an Arbitrarily Oriented Slot at the End Wall of a Rectangular Waveguide

“…At the present time, narrow slots cut in rectangular waveguide end walls whose longitudinal axis is parallel to one of the coordinate system axes are widely used in microwave antenna-waveguide technology. The slots can serve as radiators which radiate into a half-space above an infinite screen [1][2][3], as coupling elements between various electrodynamic volumes [4][5][6] and as structural components of combined radiating structures [7]. A control of electrodynamic characteristics of the radiators and coupling slots can be realized, first of all, by varying slot geometric dimensions and positions relative to the waveguide walls under conditions that the coordinate system axes associated with the slot and waveguide are parallel.…”