IEEJ Transactions on Electronics, Information and Systems
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
<Information and Communication Technology>
Considerations on Monopulse-Based Antenna System for Security Gates
Tomoki SakogawaKatsuyoshi AokiFutoshi KurokiMasanori EguchiTakeshi Yamakawa
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2018 Volume 138 Issue 2 Pages 100-105


Because radiation patterns of conventional antennas at the security gates are not enough sharp, many false operations are pointed out to recognize the RF-tags located in short distance away from the security gates. In this paper, a technique to narrow down the radiation patterns of the antenna operationally was proposed while keeping antenna size to be small based on the monopulse system at 920MHz. From the numerical and experimental investigations, it was obvious that this system guaranteed the narrow beam operation to be less than the range of the arrival angle of 20° although an antenna with a half power beamwidth of 150° was used. And moreover, influence of the interference waves from other unchecked RF-Tags located in short distance away from the security gate was considered, the shoplifted RF-Tag passing through the security gate.

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© 2018 by the Institute of Electrical Engineers of Japan
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