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International Journal of Antennas and Propagation
Volume 2012, Article ID 134916, 6 pages
http://dx.doi.org/10.1155/2012/134916
Research Article

Analysis of Horn Antennas in Receiving Mode as an EM Field Sensor

1Information & Electronics Research Institute, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejon 305-701, Republic of Korea
2Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejon 305-701, Republic of Korea

Received 20 July 2011; Revised 13 October 2011; Accepted 9 November 2011

Academic Editor: Krishnasamy Selvan

Copyright © 2012 Maifuz Ali and Seong-Ook Park. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Electromagnetic (EM) field measurement uses antenna in receiving mode as EM field sensor (EMFS). FDTD technique is applied to analyze the horn antenna in this mode. The performances of horn antenna as EMFS are predicted in terms of antenna factor (AF), and the results are compared with measurements. New empirical formula for quick calculation of antenna factor of pyramidal horn is also presented. Also, the gain of horn antennas are computed in receiving mode using FDTD technique, and the results are compared with published measured result and far-field gain formula.