Title :
A dual-band dual-feed Fresnel zone antenna concept: application in solar sails missions
Author :
Khayatian, B. ; Rahmat-Sami, Y.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A Fresnel Zone (FZ) antenna is envisioned to be integrated as a part of a large sail structure in the solar sail mission (see Khayatian, B. et al., IEEE APS Int. Sym., vol.2, p.742-5, 2001). Furthermore, a design was proposed to accommodate enough antenna gain to satisfy the communication link requirements. Spacecraft communication takes place over the uplink and downlink X-band around 8.49 and 7.16 GHz. This, in turn, requires an operating bandwidth of more than 9% for the Fresnel antenna configuration. Since the operating bandwidth of FZ antennas is inversely proportional to their number of rings, the bandwidth of the proposed 10 m FZ antenna (having F/D=1, with 33 rings) cannot exceed 3% (see Khayatian et al.). To enhance the required bandwidth criterion of the FZ antenna, a dual-band design of this antenna configuration is investigated.
Keywords :
antenna radiation patterns; antenna theory; directive antennas; multifrequency antennas; reflector antenna feeds; satellite antennas; space communication links; space vehicles; 10 m; 7.16 GHz; 8.49 GHz; Fresnel zone antenna; X-band; dual-band antenna; dual-feed antenna; operating bandwidth; radiation pattern; reflector; solar sails missions; Antenna feeds; Bandwidth; Design methodology; Displays; Downlink; Dual band; Frequency; Fresnel reflection; Message-oriented middleware; Space vehicles;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016425
