dipole antenna


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dipole antenna

[′dī‚pōl an′ten·ə]
(electromagnetism)
An antenna approximately one-half wavelength long, split at its electrical center for connection to a transmission line whose radiation pattern has a maximum at right angles to the antenna. Also known as doublet antenna; half-wave dipole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

dipole antenna

dipole antenna
dipole antennaclick for a larger image
i. An antenna system composed of two, separated, electrically equal elements.
ii. Radiators, usually fed in the center, that produce a maximum of radiation in the plane normal to its axis. The length required for efficient radiation is a function of the frequency of the radiated wave.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

dipole antenna

Meaning "two poles," a dipole antenna is the simplest type of antenna, consisting of an electrically conducting wire or rod one half the length of the maximum desired wavelength. The wire or rod is split at the center with an insulator. Each end at the center is connected to the feed line, typically via a balun to a coaxial cable (see balun).
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References in periodicals archive ?
* At the equatorial plane of the electric dipole antenna, [theta] = [pi]/2 and
In the commercial systems for SAR measurement a dipole antenna and a shell full of human head equivalent materials is used.
Table 1 summarizes the measured [S.sub.21] values of the two diamond dipole antennas for off-body and on-body environments.
Wang, "Wideband printed dipole antenna using a novel PBG structure," Microwave and Optical Technology Letters, Vol.
However, actual algorithm should increase transmission power of nodes 2 and 3 to communicate with each other when dipole antenna is used.
In this paper, a new wideband magneto-electric dipole antenna is proposed.
To confirm above discussions, we have considered a half wavelength dipole antenna and simulated it with regular FDTD, DGF with direct time and spatial convolutions, DGF with FFT for time domain convolution, DGF with FFT for spatial domain convolutions, and DGF with FFT for time and spatial domain convolutions.
The input impedance of the wide-strip dipole antenna evaluated using an arbitrarily-shaped distributed gap source model is obtained by calculating the parallel combination of [Z.sup.in.sub.11], [Z.sup.in.sub.12], and [Z.sup.in.sub.13], where
They are very close to those of an ideal dipole antenna. Figure 7 shows photographs of the setup for radiation pattern measurement of the chip antenna in an anechoic chamber.
Both military and commercial tests originally called out manually tuned dipole antennas. Later, shortened broadband dipoles were introduced into EMC measurements, and the specifications began requiring that both vertical and horizontal polarizations be measured.
Nguyen, "Circularly polarized bandwidth-enhanced crossed dipole antenna with a simple single parasitic element," IEEE Antennas and Wireless Propagation Letters, vol.