Title :
A method of moments analysis of a dual frequency rectangular waveguide-ridged waveguide cavity antenna
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
The authors study the interference that occurs between the high-frequency and low-frequency portions of a proposed dual-band antenna when the antennas transmit into free space or into an inhomogeneous plasma layer. They analyze two limiting cases, namely, (1) when the apertures of the antenna are backed by infinite waveguide sections, and (2) when the apertures are backed by cavities and the rectangular cavity contains a probe in it and the ridged waveguide section does not. Numerical examples are presented.<>
Keywords :
antenna theory; rectangular waveguides; waveguide antennas; waveguide theory; apertures; cavity antenna; dual frequency antenna; dual-band antenna; free space; infinite waveguide sections; inhomogeneous plasma layer; interference; method of moments; rectangular cavity; rectangular waveguide; ridged waveguide; Aperture antennas; Aperture coupled antennas; Dual band; Electromagnetic waveguides; Frequency; Impedance; Moment methods; Probes; Rectangular waveguides; Transmitting antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94316
