Reflector Antenna Radome Heating for Ice Control
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Solution Overview
Problem
Satellite antennas experience signal attenuation due to snow and ice accumulation on reflectors, leading to rain fade and thermal expansion issues that affect antenna performance.
Innovation Solution
A reflector antenna heating system with a dielectric radome and heater blower devices that circulate heated air around the perimeter and inside surface of the radome, preventing ice and snow buildup while minimizing thermal expansion on the reflector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If heated air is circulated around the reflector to melt snow and ice, then ice removal effectiveness is improved, but thermal expansion of the reflector increases
Solution Approach 1:
The heating system is divided into multiple heater blower devices distributed around the reflector perimeter, with each device responsible for a specific section. This segmentation allows localized heating of only the areas where ice accumulation occurs, rather than heating the entire reflector surface, thus reducing overall thermal expansion.
Solution Approach 2:
The heating system applies heat locally to the radome and reflector edges where ice accumulation is most problematic, rather than uniformly heating the entire reflector. The outlet duct assemblies direct heated air specifically along the inside surface of the radome and around the perimeter, creating localized heating zones that prevent ice buildup without causing significant thermal expansion of the main reflector surface.
2Object-affected harmful factors
If a radome is added to protect the reflector, then ice accumulation is reduced, but device complexity increases
Solution Approach 1:
The radome serves multiple functions: it protects the reflector from ice and snow accumulation, provides a smooth aerodynamic surface, and works in conjunction with the heating system to prevent ice buildup. By combining these functions into a single component, the overall device complexity is reduced compared to having separate protective structures.
Solution Approach 2:
The radome acts as an intermediary layer between the environment (snow and ice) and the reflector surface. It provides a protective barrier that prevents direct ice accumulation on the reflector, while the heating system works through or alongside the radome to melt ice when conditions require active de-icing.
3Object-affected harmful factors
If heater blower devices are used to prevent ice buildup, then ice removal effectiveness is improved, but energy consumption increases
Solution Approach 1:
The heater blower devices operate at partial capacity, providing just enough heat to prevent ice accumulation rather than continuously melting all ice. The system uses outlet duct assemblies to efficiently direct heated air only where needed (along the radome interior and reflector perimeter), reducing energy waste compared to heating entire surfaces.
Solution Approach 2:
The heating system operates preventively by maintaining temperatures above the freezing point on the radome and reflector edges, preventing ice accumulation before it occurs rather than requiring high-energy melting operations after ice has formed. This preliminary heating action reduces the total energy required compared to active ice removal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively melts snow and ice, maintaining antenna performance by preventing gain loss and thermal expansion, ensuring continuous communication and reducing signal attenuation.
Implementation Method 1
Each of the plurality of outlet duct assemblies is coupled to the outlet port of a respective heater blower device to direct heated air around a perimeter of the reflector and along an inside surface of the dielectric radome
Implementation Method 2
Effectively melts snow and ice, maintaining antenna performance
Implementation Method 3
One or more gaps proximal to a center of the reflector are included to recirculate cooled air toward a plurality of inlet ducts for the plurality of heater blower devices
Data Source
AI summary
A reflector antenna heating system includes a dielectric radome that covers a first side of a reflector and a feed subsystem of an antenna. The system also includes a plurality of heater blower devices on a second side of the reflector, each of the plurality of heater blower devices having an inlet port and an outlet port. The system further includes a plurality of outlet duct assemblies, wherein each of the plurality of outlet duct assemblies is coupled to the outlet port of a respective heater blower device to direct heated air around a perimeter of the reflector and along an inside surface of the dielectric radome. One or more gaps proximal to a center of the reflector are included to recirculate cooled air toward a plurality of inlet ducts for the plurality of heater blower devices to feed the inlet port of each heater blower device.