Title :
Design of a cascaded frequency selective surface as a dichroic subreflector
Author :
Agahi, S. ; Mittra, R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
The frequency selective surface (FSS) is often used as a filter for electromagnetic radiation to separate the S- and K-band feed in a communication satellite. The problem of synthesizing such a multifrequency-band FSS as a subreflector in a communication satellite antenna system that covers the frequency range of 2-30 GHz is considered. The reflection and transmission properties of FSS screens are calculated using the spectral-Galerkin method in conjunction with the cascading technique. The frequency responses of one-layer, two-layer, and three-layer screens are shown. The frequency response of a four-legged FSS was also computed. It is shown that the square-aperture-type FSS performs better than the four-legged configuration.<>
Keywords :
antenna feeders; antenna reflectors; frequency response; microwave antennas; satellite antennas; 2 to 30 GHz; EM radiation filter; FSS screens; K-band feed; S-band feeder; SHF; cascaded frequency selective surface; cascading technique; communication satellite; communication satellite antenna system; design; dichroic subreflector; four-legged FSS; frequency responses; multifrequency-band FSS; one layer FSS; reflection properties; spectral-Galerkin method; square-aperture-type FSS; three-layer screens; transmission properties; two layer FSS; Artificial satellites; Electromagnetic radiation; Feeds; Filters; Frequency response; Frequency selective surfaces; Frequency synthesizers; Multifrequency antennas; Reflection; Satellite antennas;
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.1990.115055
