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Spirapole antenna for communication systems utilizing both satellite and terrestrial assets

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4 Author(s)
Colburn, J.S. ; HRL Labs., Malibu, CA, USA ; Lynch, J.J. ; Obatoyinbo, A. ; Talty, T.

In this paper an antenna is presented that satisfies the two-fold radiation pattern requirement of communication systems utilizing both geostationary satellites and terrestrial transponders for coverage of mobile terminal away from the equator. A typical requirement for such a system is a low profile antenna that maximizes left-hand circularly polarized radiation in the satellite viewing angle, from 30° to 70° from zenith, and vertically polarized radiation in the terrestrial station viewing angle, from 70° to 90° from zenith. This dual radiation pattern coverage is achieved by integrating a small four arm spiral with a top loaded monopole into a single compact volume, an antenna termed a spirapole.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:53 ,  Issue: 2 )