Moment method analysis of sidewall inclined slots in rectangular waveguides

• Published in: IEEE transactions on antennas and propagation Vol. 39; no. 1; pp. 68 - 73
• Main Authors: JAN, C H E N G-G E N G, Hsu, Powen, WU, R U E Y-B E E I
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.1991; Institute of Electrical and Electronics Engineers
• Subjects: Antenna arrays; Apertures; Applied sciences; Circuit properties; Distributed computing; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Geometry; Green's function methods; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Moment methods; Receiving antennas; Rectangular waveguides; Resonance; Waveguide components; Moment method; Slot; Coupling; Experimental study; Green function; Waveguide; Modeling; Rectangular waveguide
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.64437

The main feature is the use of a 90 degrees wedge Green's function to model the external coupling between the parts of the slot in the narrow and broad walls of the waveguide. The aperture field distributions of the inclined slots are solved directly. It is found that for resonant slots, the aperture field is approximately of constant phase, while its amplitude is nearly sinusoidal but with a slight tilt. From the field distribution, various characteristics of the slot can be extracted, such as the conductance, susceptance, and resonant length. The numerical computations are in good agreement with experimental results available in the literature.< >