TY - GEN
T1 - A compact circularly-polarized square slot antenna with enhanced axial-ratio bandwidth using metasurface
AU - Nosrati, Mehrdad
AU - Tavassolian, Negar
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/10/18
Y1 - 2017/10/18
N2 - A low-profile single-fed, wideband, circularly-polarized slot antenna is proposed. The antenna comprises a square slot fed by a U-shaped microstrip line which provides a wide impedance bandwidth. Wideband circular polarization is obtained by incorporating a metasurface consisting of a 9 × 9 lattice of periodic metal plates. It is shown that this metasurface generates additional resonances, lowers the axial ratio (AR) of the radiating structure, and enhances the radiation pattern stability at higher frequencies. The overall size of the antenna is only 28 mm × 28 mm (0.3 λo × 0.3 λo). The proposed antenna shows an impedance bandwidth from 2.6 GHz to 9 GHz (110.3%) for |S11| < -10 dB, and axial ratio bandwidth from 3.5 GHz to 6.1 GHz (54.1%) for AR < 3 dB. The antenna has a stable radiation pattern and a gain of greater than 3 dBi over the entire frequency band.
AB - A low-profile single-fed, wideband, circularly-polarized slot antenna is proposed. The antenna comprises a square slot fed by a U-shaped microstrip line which provides a wide impedance bandwidth. Wideband circular polarization is obtained by incorporating a metasurface consisting of a 9 × 9 lattice of periodic metal plates. It is shown that this metasurface generates additional resonances, lowers the axial ratio (AR) of the radiating structure, and enhances the radiation pattern stability at higher frequencies. The overall size of the antenna is only 28 mm × 28 mm (0.3 λo × 0.3 λo). The proposed antenna shows an impedance bandwidth from 2.6 GHz to 9 GHz (110.3%) for |S11| < -10 dB, and axial ratio bandwidth from 3.5 GHz to 6.1 GHz (54.1%) for AR < 3 dB. The antenna has a stable radiation pattern and a gain of greater than 3 dBi over the entire frequency band.
KW - Circular polarization (CP)
KW - Metasurface
KW - Wideband antennas
UR - https://www.scopus.com/pages/publications/85042257098
UR - https://www.scopus.com/inward/citedby.url?scp=85042257098&partnerID=8YFLogxK
U2 - 10.1109/APUSNCURSINRSM.2017.8072096
DO - 10.1109/APUSNCURSINRSM.2017.8072096
M3 - Conference contribution
AN - SCOPUS:85042257098
T3 - 2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
SP - 107
EP - 108
BT - 2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
T2 - 2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2017
Y2 - 9 July 2017 through 14 July 2017
ER -