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Effect of dielectric coatings on parabolic reflector antenna performance
Author(s) -
Lo K. W.,
Bird T. S.
Publication year - 1995
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650080102
Subject(s) - materials science , dielectric , reflector (photography) , optics , coating , cassegrain antenna , antenna (radio) , polarization (electrochemistry) , antenna gain , radiation pattern , offset dish antenna , optoelectronics , periscope antenna , antenna efficiency , physics , composite material , electrical engineering , engineering , chemistry , light source
The effect of a dielectric coating on the gain, co‐polar radiation pattern, and cross‐polarization level of a linearly polarized parabolic reflector antenna is investigated for both dry and wet surface conditions using a physical optics analysis of the equivalent surface currents. By choosing the correct thickness, the effect of a dielectric coating can be minimized, and, at the same time, an equivalent metal‐reflector representation shows that the antenna gain is less sensitive to the coating surface accuracy.