Bandwidth Enhancement of a Circularly Polarized Spiral Antenna using a Circular EBG Reflector

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dc.contributor.authorLuadang, Bancha
dc.contributor.authorJanpangngern, Pisit
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.contributor.authorChudpooti, Nonchanutt
dc.date.accessioned2026-08-06T10:38:47Z
dc.date.available2026-08-06T10:38:47Z
dc.date.issued2023-01-01
dc.description.abstractThis paper describes the bandwidth enhancement of a circularly polarized (CP) spiral antenna using a circular electromagnetic band-gap (EBG) reflector for satellite communications and other wireless applications. The spiral antenna is placed at the front, and at the bottom is a circular EBG reflector with high-impedance surface properties. For comparison, circular EBG reflector was studied in comparison with circular PEC reflector. The antenna height from the bottom of the circular EBG reflector to the spiral antenna is small: 0.1 wavelengths at the lowest design frequency of 1.3 GHz. The circular EBG reflector contributes to a constant input impedance and small axial ratio (AR) throughout the design frequency range of 1.5–9.0 GHz (143%). The results of the analysis were verified by the measured results of the prototype antenna.
dc.identifier.citation2023 IEEE International Symposium on Antennas and Propagation Isap 2023, 2023
dc.identifier.doi10.1109/ISAP57493.2023.10388919
dc.identifier.other2-s2.0-85184822348
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/13690
dc.source2023 IEEE International Symposium on Antennas and Propagation Isap 2023
dc.subjectcircularly polarized
dc.subjectelectromagnetic band-gap (EBG)
dc.subjectSpiral antenna
dc.subjectwideband antenna
dc.titleBandwidth Enhancement of a Circularly Polarized Spiral Antenna using a Circular EBG Reflector
dc.typeConference Paper

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