Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1995-06-22
1997-05-27
Le, Hoanganh T.
Communications: radio wave antennas
Antennas
Spiral or helical type
343788, 343876, 343705, H01Q 1108, H01Q 100
Patent
active
056336497
ABSTRACT:
An antenna for transmitting electromagnetic signals having a frequency less than 500 Hz includes a beam of dielectric material and a conductive sheet wound in a helical pattern around the beam of dielectric material. The antenna further includes a core fabricated from a silicon and iron alloy, the cote disposed between the beam of dielectric material and the conductive sheet. With such an arrangement, a magnetic dipole antenna is provided capable of providing a magnetic moment of approximately 10.sup.6 to 10.sup.7 Am.sup.2.
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"Air/Undersea Communication at Ultra-Low-Frequencies Using Airborne Loop Antennas," A. C. Fraser-Smith et al., Stanford Electronics Laboratories, Jun. 1977, Technical Report No. 4207-6, pp. iii-vii-1-75.
Grossi Mario D.
Seferian Mark A.
Soyka Michael G.
Le Hoanganh T.
Mofford Donald F.
Raytheon Company
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