Analysis and design of circularly polarized capacitively-fed planar suspended antenna for universal UHF RFID applications

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dc.contributor.authorBoonying, Komkris
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.date.accessioned2026-08-06T10:27:47Z
dc.date.available2026-08-06T10:27:47Z
dc.date.issued2020-01-01
dc.description.abstractThis research paper deals with the design of a circularly polarized reader antenna with a tennis ball-shaped radiating plate that operates at a frequency range of 860-960 MHz with the center frequency of 910 MHz. In the fabrication of the tennis ball-shaped radiating plate, a small annular-ring slot was first created on a circular radiating plate, followed by two diagonally opposite large arc-shaped annular-ring slots on either edge of the circular radiating plate and then the truncation of the corners of the remaining main element of the plate. A prototype antenna with the final tennis ball-shaped plate was subsequently assembled prior to excitation by the capacitively coupled feed technique to enhance |S11| bandwidth. The prototype antenna could achieve an average gain of 6.18 dBic, |S11| covering the frequency range of 837.6-966.2 MHz, and the circular polarization of 850.6-963.5 MHz, making it suitable for universal UHF RFID applications. In addition, simulations were carried out using CST Microwave Studio for comparison with the experimental results.
dc.identifier.citationPrzeglad Elektrotechniczny, 96(1), 100-107, 2020
dc.identifier.doi10.15199/48.2020.01.23
dc.identifier.issn00332097
dc.identifier.other2-s2.0-85079368357
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/10724
dc.sourcePrzeglad Elektrotechniczny
dc.subjectCapacitively coupled feed
dc.subjectCircular polarization
dc.subjectSuspended structure
dc.subjectTruncation corners
dc.subjectUHF RFID
dc.titleAnalysis and design of circularly polarized capacitively-fed planar suspended antenna for universal UHF RFID applications
dc.typeArticle

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