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The Thick Tubular Transmitting Antenna
Author(s) -
W. P. King Ronold,
Wu Tai Tsun
Publication year - 1967
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 - 10.1002/rds1967291061
Subject(s) - antenna (radio) , integral equation , coaxial , physics , optics , dipole antenna , acoustics , monopole antenna , tube (container) , materials science , mathematics , mathematical analysis , telecommunications , computer science , composite material
The growing importance of electrically thick monopole antennas has suggested a re‐examination of the model used in the derivation of the integral equation for the current in tubular antennas. It is shown that when such an antenna is driven from a coaxial line in the usual manner, which maintains a field along a narrow circumferential region on the outside surface of the tube (instead of along both the inner and outer surfaces), an additional term is required in the integral equation. This is negligible when the antenna is electrically thin, but of major importance when it is not. A quantitative comparison of conductances is provided over a wide range of thickness.