Short whips (monopoles) are often used on vehicles when a quarter wavelength is too long. It is common knowledge that a loading coil located in series with the whip improves narrow band performance. This series inductive loading of monopole (dipole) antennas is analyzed by a piecewise sinusoidal moment method. When loaded tor esonance, the current rises from the feed value to a peak slightly beyond the load point with decay to zero at the end. Radiation resistance improvement factors as large as 5 have been calculated. The resonant loading reactance is shown to vary inversely with the antenna length for most lengths.
Optimum inductive loading of short whip antennas
Optimale induktive Belastung von kurzen Stabantennen
IEEE Transactions on Vehicular Technology ; 24 , 2 ; 21-29
1975
9 Seiten, 11 Bilder, 15 Quellen
Article (Journal)
English
Simulation of electromagnetic characters of vehicle whip antennas based on MoM
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