Compound radiating slots in a broad wall of a rectangular waveguide

• Published in: IEEE transactions on antennas and propagation Vol. 37; no. 9; pp. 1116 - 1123
• Main Author: Rengarajan, S.R.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-09-1989; Institute of Electrical and Electronics Engineers
• Subjects: Apertures; Applied sciences; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Frequency; Integral equations; Linear antenna arrays; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Moment methods; Rectangular waveguides; Resonance; Scattering; Slot antennas; Wave scattering; Moment method; Slot; Integral equation; Resonance; Waveguide; Rectangular waveguide
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.35791

An analysis is presented of the characteristics of a broad wall radiating slot, offset from the center line and tilted with respect to the longitudinal axis of a rectangular waveguide. Pertinent integral equations are developed, taking into account finite wall thickness, and are solved for the slot aperture E-field using the method of moments. Compound slot characteristics are then deduced, including resonant length and dominant mode scattering. Numerical results for the scattering from resonant slots are presented over a range of offsets, tilt angles, frequencies and waveguide dimensions. For resonant compound slots, offset and tilt are shown to control the aperture electric-field amplitude with a phase variability of 360 degrees . The results have significant applications in the design of compound slot arrays.< >