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Wire antennas coated with magnetically and electrically lossy material
Author(s) -
Lee Jim P. Y.,
Balmain Keith G.
Publication year - 1979
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs014i003p00437
Subject(s) - lossy compression , electrical impedance , materials science , radiation pattern , dipole antenna , dipole , moment (physics) , antenna (radio) , input impedance , bandwidth (computing) , acoustics , optics , physics , mathematics , computer science , telecommunications , classical mechanics , quantum mechanics , statistics
The effect of coating a thin dipole antenna with a thin layer of magnetically and electrically lossy material is considered with respect to the properties of input impedance, current distribution, far‐field pattern, bandwidth, radiation efficiency, and effective length. Moment method calculations show that the change in the antenna properties is a strong function of the location and the kind of lossy material applied. The calculated input impedance of a monopole wrapped both fully and partially with different types of lossy materials is shown to agree well with measurements. An approximate semigraphical procedure for impedance calculation is postulated and shown to be useful.