Summary
International Symposium on Antennas and Propagation
2012
Session Number:4B2
Session:
Number:4B2-4
A Beam Switched Log-periodic Antenna for EMI measurement
Kenji Hagiwara, Hiroyuki Arai, Seiichi Izumi, Toshiyasu Tanaka,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
In EMI (Electromagnetic Interference) test, the electric field intensity of radiated emission from EUT (Equipment Under Test) is measured. To find the maximum radiation by EUT, a receiving antenna is moved along a vertical pole, because the electric field intensity is seriously changed by the effect of ground reflection wave. In addition to this vertical movement, the main beam tilting is required to keep stable reception level from the EUT. A mechanical tilting is the current standard, however quick and fine adjustment is expected. This paper presents electrically beam switching antennas operating from 1 GHz to 10 GHz using pair of log-periodic antenna. We show an overview of this EMI measurement, and clarify target performance of beam switching antenna. Then we propose broadband beam switching using log-periodic antennas.