Title :
Higher order mode coupling effects in feeding waveguide of a planar slot array
Author :
Rengarajan, S.R.
Author_Institution :
Dept. of Electr. & Comput. Eng., California State Univ., Northridge, CA, USA
Abstract :
Higher-order mode coupling effects between coupling slots in the main waveguide of a planar slot array are investigated. At present, centered-inclined coupling slots are characterized as series elements based on their TE/sub 10/ mode scattering. Higher-order mode coupling between adjacent centered-inclined coupling slots in the main waveguide can introduce a small but significant error in the phase of the aperture electric field. This, in turn, can lead to significant errors in the excitation of branch waveguides, and in the input voltage standing wave ratio. Numerical results on the higher-order mode coupling effects are presented.<>
Keywords :
antenna feeders; microwave antenna arrays; waveguide antennas; TE/sub 10/ mode scattering; aperture electric field; branch waveguides; centered-inclined coupling slots; feeding waveguide; higher-order mode coupling effects; input voltage standing wave ratio; phase error; planar slot array; series elements; slot antennas; transverse electric; Apertures; Geometry; Integral equations; Moment methods; Planar waveguides; Rectangular waveguides; Scattering; Testing; Transmission line matrix methods; Voltage;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115257
