Optimized Circularly Polarized Patch Antenna with Horizontal and Side Slots for UHF RFID Readers

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dc.contributor.authorWichakoon, Worathan
dc.contributor.authorNuangwongsa, Kanawat
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.date.accessioned2026-08-06T10:49:21Z
dc.date.available2026-08-06T10:49:21Z
dc.date.issued2025-01-01
dc.description.abstractThis paper presents the design and optimization of a circularly polarized UHF RFID reader antenna. The initial radiator dimensions were set at 130 mm × 130 mm, and the feed position was fine-tuned, with simulations identifying x, y = 24.5, 24.5 mm as the optimal location for impedance matching. Further optimization focused on reducing the ground plane size, with a 170 mm × 170 mm ground plane providing the optimal balance, ensuring an axial ratio below 3 dB and stable |S| (dB) response across the 920-925 MHz frequency band. The final design demonstrated an improved radiation pattern and sufficient gain, making it an effective solution for UHF RFID reader applications.
dc.identifier.citation22nd International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology Ecti Con 2025, 2025
dc.identifier.doi10.1109/ECTI-CON64996.2025.11100835
dc.identifier.other2-s2.0-105014354763
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/16495
dc.source22nd International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology Ecti Con 2025
dc.subjectcircular polarization
dc.subjectPatch Antenna
dc.subjectRFID reader
dc.subjectslot antenna
dc.subjectUHF RFID
dc.titleOptimized Circularly Polarized Patch Antenna with Horizontal and Side Slots for UHF RFID Readers
dc.typeConference Paper

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