Analysis of sleeve dipole antennas fed by ferrite-loaded coaxial cables for a scaled-down cross-borehole radar

Title
Analysis of sleeve dipole antennas fed by ferrite-loaded coaxial cables for a scaled-down cross-borehole radar
Authors
김세윤정지현조재형
Keywords
dipole antenna; Cross-borehole radar; borehole radar; diffraction pattern; ferrite; ferrite-loaded coaxial cable; sleeve dipole antenna
Issue Date
2017-11
Publisher
IEEE transactions on antennas and propagation
Citation
VOL 65, NO 11-6133
Abstract
Two equivalent models to sleeve dipole antennas fed by ferrite-loaded coaxial cables for a scaled-down cross-borehole radar are tested by employing the finite-difference time-domain method. Compared to the measured diffraction patterns of an air-filled circular cylinder in water, the simulated results based on the simplified perfect magnetic conductor model cannot provide sufficient attenuation not only in the single dip pattern at 2.6 GHz but also in double dip pattern at 2.8 GHz. It leads us to develop a more accurate one so-called distributed element model which is implemented by a finite sum of serial sections consisting of a resistor, a finite length of perfect electric conductor (PEC) cylinder, an inductor, and the same PEC cylinder. When the values of the distributed elements as well as the number of serial sections are adjusted properly, the simulated diffraction patterns closely approach to the experimentally measured data at both frequencies of 2.6 and 2.8 GHz.
URI
http://pubs.kist.re.kr/handle/201004/66366
ISSN
0018-926X
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KIST Publication > Article
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