TY - GEN
T1 - Wideband Metamaterial Crossed-Arm Unit Cell for the Design of Beam-Scanning Circularly Polarized Reflectarray Antenna
AU - Wen, Lehu
AU - Sanz-Izquierdo, Benito
AU - Gao, Steven
AU - Wong, Kai Kit
AU - Tong, Kin Fai
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - This paper presents a reconfigurable metamaterial unit cell using crossed arms and its application in designing a wideband beam-scanning circularly polarized (CP) reflectarray (RA) antenna. The unit cell is comprised of two pairs of reconfigurable rotated crossed-arms. One pair is connected by two line strips, and the other pair is connected by two arc-shaped strips. The unit cell is verified with a broad CP reflection bandwidth of 7.7-15.5 GHz. An equivalent circuit is utilized to illustrate its working principle for wide CP reflection bandwidth. Based on this meta material unit cell, a broadband RA antenna was designed, developed, and tested for the initial CP performance verification. A high gain of 26.3 dBic with the maximum aperture efficiency of 58.3 % is obtained for this fabricated RA antenna. In addition, a broad CP bandwidth (from 7.6 GHz to 15.9 GHz) for axial ratio <3 dB is achieved for the high gain unidirectional CP radiation.
AB - This paper presents a reconfigurable metamaterial unit cell using crossed arms and its application in designing a wideband beam-scanning circularly polarized (CP) reflectarray (RA) antenna. The unit cell is comprised of two pairs of reconfigurable rotated crossed-arms. One pair is connected by two line strips, and the other pair is connected by two arc-shaped strips. The unit cell is verified with a broad CP reflection bandwidth of 7.7-15.5 GHz. An equivalent circuit is utilized to illustrate its working principle for wide CP reflection bandwidth. Based on this meta material unit cell, a broadband RA antenna was designed, developed, and tested for the initial CP performance verification. A high gain of 26.3 dBic with the maximum aperture efficiency of 58.3 % is obtained for this fabricated RA antenna. In addition, a broad CP bandwidth (from 7.6 GHz to 15.9 GHz) for axial ratio <3 dB is achieved for the high gain unidirectional CP radiation.
KW - Circularly polarized antenna
KW - metamaterial unit cell
KW - reflectarray antenna
KW - wide bandwidth
UR - https://www.scopus.com/pages/publications/85171422539
U2 - 10.1109/IWS58240.2023.10222486
DO - 10.1109/IWS58240.2023.10222486
M3 - Conference contribution
AN - SCOPUS:85171422539
T3 - 2023 IEEE MTT-S International Wireless Symposium, IWS 2023 - Proceedings
BT - 2023 IEEE MTT-S International Wireless Symposium, IWS 2023 - Proceedings
T2 - 2023 IEEE MTT-S International Wireless Symposium, IWS 2023
Y2 - 14 May 2023 through 17 May 2023
ER -