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 Heated microwave antenna

Details
Inventors: Fleming, Terry L.;
Assignee: Perfect Ten Antenna Co. Inc. (Jacksonville, AR)
Primary Examiner: Le; Hoanganh T.
Assistant Examiner:
Attorney, Agent or Firm: Carver; Stephen D.

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.

DETAILED DESCRIPTION I have provided a heated microwave antenna that is ideal for receiving signals from direct broadcast satellites.
The antenna is highly weather resistant and it is ideal for northern climates.
The uniquely integrated heating system warms the dish and avoids accumulation of snow and ice that might otherwise degrade the received signal.
I have also proposed kits embodying the concepts of the invention for retrofitting to preexisting dish antennas for immunizing them against snow and ice build-up.
My heated microwave antenna is mounted upon a suitable mast that is bracketed to a suitable support.
The heated dish bounces microwave signals towards a conventional LNB.
The dish is formed from multiple laminations or elements that are sandwiched together.
This construction results in enhanced mechanical strength and improved weather resistance.
Preferably the dish comprises a galvanized, steel reflector, a similarly shaped heated grid, a foam insulation layer, and a backing plate.
All are assembled and glued together to form a composite, laminated structure.
The rear backing plate is mechanically identical to the reflector.
The grid has a distributed resistive heater element disposed upon a plastic substrate.
The heater is activated by a thermostat when temperature decrease below 34 degrees F.
The backing plate sandwiches the grid and the optional insulator against the reflector.
A vinyl trim ring tightly encircling the dish periphery seals it against the elements.
Heat generated by the grid is concentrated by the foam insulator upon the front reflector.
In other words, the antenna reflective portion that is most likely to be exposed to snow and ice is heated the most.
The foam insulator reduces heater element wattage by 40 percent.
The removal of snow and ice from the antenna rear does not improve reception.
I have also provided optional LNB heaters that may be quickly coupled to the antenna LNB.
One form of my new LNB heater is ideal for retrofitting to preexisting antennas



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