Communications: radio wave antennas – Antennas – With ice clearer or preventer
Patent
1995-09-01
1997-04-01
Le, Hoanganh T.
Communications: radio wave antennas
Antennas
With ice clearer or preventer
343912, 392422, H01Q 102
Patent
active
056171072
ABSTRACT:
A heated microwave antenna ideal for the direct broadcast satellite service, and heated conversion kits for retrofitting to conventional antennas. Antennas modified in accordance with the invention are highly weather resistant, as the dish is warmed to avoid snow and ice accumulation to prevent signal degradation. The heated microwave antenna mounts upon a mast that is bracketed to a satisfactory support. The dish focuses microwave signals upon a low noise broad band amplifier (LNB). The dish comprises multiple laminations from internal elements that are sandwiched together, and exhibits significant mechanical strength and substantial weather resistance. The preferred dish comprises a metallic reflector, a heated grid, an insulation layer, and a backing plate nested together to form a composite, laminated unit. The grid comprises a resistive heater element activated by a temperature-responsive thermostat. A concentric trim ring surrounding the dish periphery waterproofs the antenna. Optional LNB heaters are providing for warming and weatherproofing the LNB. Retrofit dish heating kits disclosed herein install upon conventional dish antennas. A heating kit adhesively retrofitted to a conventional dish comprises a heating grid and backing plate comprising a foam lined shell or insulator secured to the grid. An alternative heating kit comprises a backing plate enclosing an internal magnetic layer that retrofits the apparatus to the dish through magnetic attraction.
REFERENCES:
patent: 2679004 (1954-05-01), Dyke et al.
patent: 3805017 (1974-04-01), Roberts et al.
patent: 4031537 (1977-06-01), Alford
patent: 4866452 (1989-09-01), Barma et al.
Carver Stephen D.
Le Hoanganh T.
Perfect Ten Antenna Co. Inc.
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