Communications: radio wave antennas – Antennas – With ice clearer or preventer
Patent
1989-03-03
1991-03-12
Hille, Rolf
Communications: radio wave antennas
Antennas
With ice clearer or preventer
343771, 343872, H01Q 102
Patent
active
049996398
ABSTRACT:
An antenna radome, suitable for use with high precision, environmentally sensitive array antennas, includes a dielectric sheet formed to protect the antenna from environmental conditions and a series of conductors fixed on the sheet in a certain pattern so that the sheet with the conductors provides a lower reflection coefficient to electromagnetic waves at the antenna's operating wavelength than in the absence of the conductors. Current is caused to flow through the conductors, thus generating heat in areas of the dielectric sheet where the conductors are fixed. Accordingly, ice formation on the protective dielectric sheet can be prevented while the antenna array is operational, and accurate antenna performance is ensured. Further, the dielectric sheet presents a significantly lower reflection coefficient at the operating wavelength than radomes in which a conventional grid of heater wires is provided for melting ice.
REFERENCES:
patent: 2567804 (1951-09-01), Davies
patent: 2712604 (1955-07-01), Thomas et al.
patent: 3146449 (1964-08-01), Serge et al.
patent: 3805017 (1974-04-01), Roberts et al.
patent: 3995274 (1976-11-01), Schwartz et al.
patent: 4031537 (1977-06-01), Alford
patent: 4213029 (1980-07-01), Endicott et al.
Frazita Richard F.
Lopez Alfred R.
Hazeltine Corporation
Hille Rolf
Le Hoang-anh
Onders E. A.
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