Title :
Fixed antennas for INMARSAT and MSAT applications
Author_Institution :
AK Electromagnetique Inc., Coteau Station, Que., Canada
Abstract :
The helical antenna operating in the axial mode is used as a circularly polarized radiator with a wide bandwidth. The author reports the possibilities of enhancing the power gain with the helix axial length unchanged and without any parasitic element. The design is based on the combination of the traveling wave, surface wave, and lens focusing principles. Although designed initially for INMARSAT systems, the antennas considered are also suitable for emerging MSAT fixed terminal applications. The antennas, which can handle temperature extremes of -70 to +80 degrees C, are rated for input powers of at least 150 W.<>
Keywords :
satellite antennas; satellite relay systems; -70 to 80 degC; INMARSAT; MSAT fixed terminal applications; circularly polarized radiator; helical antenna; helix axial length; lens focusing; power gain; satellite antennas; surface wave; traveling wave; wide bandwidth; Antenna measurements; Antenna radiation patterns; Antennas and propagation; Azimuth; Dielectrics; Electromagnetic wave polarization; Helical antennas; Lenses; Surface waves; Testing;
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.1991.175147
