Measured admittances of electrically thick monopoles

Author

King, Ronold W.P.

Author_Institution

Harvard Univ., Cambridge, MA, USA

Volume

20

Issue

6

fYear

1972

fDate

11/1/1972 12:00:00 AM

Firstpage

763

Lastpage

766

Abstract

Extensive measurements of admittances are reported for electrically thick cylindrical monopoles driven from coaxial lines over a large ground plane. The monopoles have circular cross sections with radii in the range from $a/\\lambda = 0.039$ to 0.140 or circumferences from approximately $0.25\\lambda$ to $0.88\\lambda$ where $\\lambda$ is the wavelength. Results are given for tubes with open ends, flat metal ends, and ends with hemispherical caps. Graphical representations of the measured values are given over a range of lengths of the monopoles extending from $h/\\lambda = 0.05$ to $h/\\lambda = 1.0$ . The ratios of the radii of the outer to the inner conductor of the coaxial lines used are near 1.2. Comparisons with available theory are considered briefly together with the related problem of end correction for the coaxial line.

Keywords

Antenna measurements; Cylindrical antennas; Monopole antennas; Antenna measurements; Circuits; Coaxial components; Conductors; Dipole antennas; Electric variables measurement; Force measurement; Length measurement; Thickness measurement; Wavelength measurement;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.1972.1140297

Filename

1140297