Title :
Compound coupling slots for arbitrary excitation of waveguide-fed planar slot arrays
Author :
Rengarajan, Sembiam R.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
2/1/1990 12:00:00 AM
Abstract :
A resonant coupling slot cut in the common broad wall of two crossed rectangular waveguides is analyzed. The slot is offset from the center line and tilted with respect to the longitudinal axis of the main waveguide, whereas it is centered-tiled in the branch waveguide. It is shown that the slot offset and tilt control the branch waveguide excitation amplitude with a phase variability of 360°. Pertinent integral equations are developed, taking into account finite wall thickness. The integral equations are solved for the slot aperture electric field using the method of moments. Dominant mode scattering by the slot in both waveguides is obtained
Keywords :
integral equations; microwave antenna arrays; rectangular waveguides; waveguide antennas; waveguide couplers; arbitrary excitation; branch waveguide excitation amplitude; common broad wall; compound coupling slots; crossed rectangular waveguides; finite wall thickness; integral equations; longitudinal axis; main waveguide; method of moments; mode scattering; phase variability; slot aperture electric field; slot array antenna; slot offset; tilt control; waveguide-fed planar slot arrays; Antennas and propagation; Closed-form solution; Current measurement; Dipole antennas; Impedance; Integral equations; Planar waveguides; Rectangular waveguides; Resonance; Scattering;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
