Title :
Analysis for MM/GTD of circularly polarized dual beam antennas
Author :
Kawakami, H. ; Sato, G.
Author_Institution :
Fac. of Sci. & Technol., Sophia Univ., Bulgaria
Abstract :
Consideration is given to a monopole antenna with a planar finite reflector and especially with a disk reflector made of a perfect conductor. A hybrid analysis method consisting of the moment method and geometrical theory of diffraction (MM/GTD) is used to calculate the effects of antenna reflectors, especially those of the edge of a circular finite reflector, on the input impedance and directivity of the antenna system, and experiments on several examples of such a system are performed. Assuming the direction and number of elements of the monopole antenna to be arbitrary values, the effects of diffractions due to the reflector´s edges are considered on the basis of the GTD.<>
Keywords :
antennas; electromagnetic wave diffraction; electromagnetic wave polarisation; GTD; MM; antenna reflectors; antenna system; circular finite reflector; circularly polarized dual beam antennas; directivity; disk reflector; geometrical theory of diffraction; hybrid analysis method; input impedance; moment method; monopole antenna; perfect conductor; planar finite reflector; Antenna theory; Conductors; Directional antennas; Directive antennas; Impedance; Moment methods; Performance analysis; Physical theory of diffraction; Polarization; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175094
