Wideband Bidirectional Circularly Polarized S-Slot Antenna with Dielectric Superstrate
| dc.contributor.author | Luadang, Bancha | |
| dc.contributor.author | Janpangngern, Pisit | |
| dc.contributor.author | Phongcharoenpanich, Chuwong | |
| dc.date.accessioned | 2026-08-06T10:43:08Z | |
| dc.date.available | 2026-08-06T10:43:08Z | |
| dc.date.issued | 2024-01-01 | |
| dc.description.abstract | This paper presents the design of a circularly polarized (CP) wideband S-slot antenna with a bidirectional radiation pattern, using a dielectric superstrate (DS) to increase the gain. The antenna achieves an enhance axial ratio (AR) bandwidth and reduced back lobe of radiation pattern. The S-slot antenna is positioned midway between a rectangular dielectric superstrate and an S-slot radiating element, which has a dielectric constant of εr = 4.3. The DS acts as a lens, refracting the electric field to combine the antenna beam and increase the antenna gain. For performance evaluation, the S-slot radiating element without the DS was compared to the proposed antenna. The antenna size is optimized for a center frequency of 5.5 GHz. The square DS contributes significantly to the bandwidth ratio, achieving an axial ratio AR ≤ 3 dB across the design frequency range (|S11| ≤ -10 dB) of 4.0-6.25 GHz. This antenna design is suitable for wireless communications and 5G sub-6 GHz applications, such as in long bridge/tunnel areas, coal mines communications, radio frequency identification (RFID) systems, and various wireless communication systems. | |
| dc.identifier.citation | Isap 2024 International Symposium on Antennas and Propagation, 2024 | |
| dc.identifier.doi | 10.1109/ISAP62502.2024.10846480 | |
| dc.identifier.other | 2-s2.0-85218205157 | |
| dc.identifier.uri | https://dspace.kmitl.ac.th/handle/123456789/14853 | |
| dc.source | Isap 2024 International Symposium on Antennas and Propagation | |
| dc.subject | circularly polarized (CP) | |
| dc.subject | dielectric superstrate (DS) | |
| dc.subject | S-slot antenna | |
| dc.subject | wideband antenna | |
| dc.title | Wideband Bidirectional Circularly Polarized S-Slot Antenna with Dielectric Superstrate | |
| dc.type | Conference Paper |