Summary
International Symposium on Antennas and Propagation
2008
Session Number:3C24
Session:
Number:3C24-4
The Influence on Characteristics of the Antennas Caused by Short Pins of Biconical Antennas
Mio Nagatoshi, Masanobu Hirose, Satoru Kurokawa, Hisashi Morishita,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Today, popularization of electronic equipment causes various problems with unexpected electromagnetic waves from the equipment. For these problems, the interference waves from 30 MHz to 1000 MHz should be measured by antennas. This measurement is called Electromagnetic Interference (EMI) measurement. Standard antennas for EMI measurement are half-wavelength dipole antennas. Recently, a biconical antenna which is one of broadband antennas is used for automatic EMI measurement. For the difference between radiation patterns of a half-wavelength dipole antenna and a biconical antenna, two measured electric fields are different [1]. Biconical antennas have various types. We call a metal bar from a center conductor to an outside element, a short pin. The biconical antenna having a pair of the short pins has various combinations of directions of right and left short pins. Depending on the number of pairs of the short pins or directions of the short pins, the structures of the biconical antennas are different and the characteristics are different. In this paper, we demonstrate the influence on the antenna characteristics cased by the short pins of biconical antennas, using a simulation soft FEKO.