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What does a radome protect an aperture antenna from?

  • A.Corrosion of the reflector surface caused by the currents flowing across it
  • B.Weather, ice and wind loading
  • C.Interference arriving from directions outside the main beam of the antenna
  • D.The heating effect of the transmitted power on the feed structure behind it

Answer: B

A radome keeps rain, snow, ice and birds off the structure and greatly reduces the wind loading the mount must carry, in exchange for a little transmission loss and some pattern distortion. It does nothing about interference, which is a pattern and filtering matter, and surface currents cause no corrosion of consequence. Every protective measure in this field has an electrical price, and quantifying that price is part of specifying the radome.

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