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http://dx.doi.org/10.17661/jkiiect.2017.10.3.220

A Study on the Near Field Beam Scanning of the Array Antenna  

Song, Woo-Young (Department of Electronic Engineering, University of Cheong-Ju)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.10, no.3, 2017 , pp. 220-224 More about this Journal
Abstract
In this paper, a method of feeding for the near field beam scanning array antenna with three dimensional focal point has been studied. The conventional array antenna theory is mostly about the far field points. The basic idea is to feed the transmitted signal so that it is in phase at the desired point. In this study, a method is proposed to compensate the phase to have the maximum received power at the point where the measurement point distance is near to the array antenna size. In the proposed method, 11 point source antennas are arrayed in three ways in free space. And the contour map is plotted by calculating the radiation patterns in the three dimensional space and the received signal intensities in the plane within the near space. As a result, it was confirmed that 3 dimensional beam scanning is possible also in the near field of the array antenna.
Keywords
Array antenna; Tumer treatment; Hyperthermia; Near field array; Planar array;
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