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Title: L-Band Mobile Terminal Antennas for Helicopters
Authors: Wu, T.K.
Farazian, K.
Golshan, N.
Divsalar, D.
Hinedi, S.
Issue Date: 16-Jun-1993
Citation: Pasadena, CA
Abstract: The feasibility of using a low gain antenna (LGA) as a mobile terminal antenna for helicopters is described in this paper. The objectives are 1) to select the lowest cost antenna system which can be easily mounted on a helicopter and capable of communicating with a satellite, and 2) to determine the best antenna position on the helicopter to mitigate the signal blockage due to rotor blades and the multipath effect from the helicopter's body. The omni-directional low gain antenna (LGA) is selected because it is simple, reliable, and low cost. The helix antenna is selected among the many LGAs because it is the most economical one and has the widest elevation beamwidth. Both 2-arm and 4-arm helices are studied experimentally to determine the antenna's performance and the scattering effects from the helicopter's body. It is found that the LGA should be located near the tail section and at least 8 inches above the helicopter.
Appears in Collections:JPL TRS 1992+

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