TY - JOUR
T1 - Metasurface Antenna With Cocircularly Polarized Radiation Characteristics for Wideband Monostatic Simultaneous Transmit and Receive Applications
AU - Wu, Di
AU - Sun, Yu-Xiang
AU - Lian, Ruina
AU - Xiao, Bing
AU - Li, Min
AU - Xu, Kai-Da
PY - 2023/4
Y1 - 2023/4
N2 - A monostatic simultaneous transmit and receive (STAR) antenna system consisting of a metasurface-based STAR antenna and two elaborately designed microstrip-based feeding networks is proposed to suppress the self-interference (SI) from transmission (TX) to reception (RX), a key challenge in STAR design to realize its potential in doubling system capacity. The metasurface antenna is for the first time used in designing a monostatic STAR antenna system for its compact and wideband characteristics. The proposed STAR antenna system possesses the features of monostatic operation, wide bandwidth, high TX/RX isolation, cocircularly polarized radiation with similar patterns for TX and RX, easy fabrication, and low cost. The metasurface-based STAR antenna is formed by four dual-polarized metasurface antennas, or units, and is used for both TX and RX to achieve monostatic operation. A wide operating bandwidth is obtained for each antenna unit by combining the resonate modes of the unit and a crossed slot, the feeding structure of the unit, using characteristic mode analysis (CMA). To achieve high TX/RX isolation and identical right-handed circular polarization (RHCP), the four TX and RX ports of the STAR antenna, respectively, are excited with equal amplitudes and relative phases of 0°, 90°, 180°, and 270°, by two dedicated-designed wideband feeding networks based on the sensitivity analysis. Accordingly, the proposed STAR antenna system is prototyped. The measurement results show that the STAR antenna system achieves >36 dB TX/RX isolation and <3 dB axial ratio from 4.5 to 6 GHz and maintains similar radiation patterns with the same RHCP for TX and RX. © 2023 IEEE.
AB - A monostatic simultaneous transmit and receive (STAR) antenna system consisting of a metasurface-based STAR antenna and two elaborately designed microstrip-based feeding networks is proposed to suppress the self-interference (SI) from transmission (TX) to reception (RX), a key challenge in STAR design to realize its potential in doubling system capacity. The metasurface antenna is for the first time used in designing a monostatic STAR antenna system for its compact and wideband characteristics. The proposed STAR antenna system possesses the features of monostatic operation, wide bandwidth, high TX/RX isolation, cocircularly polarized radiation with similar patterns for TX and RX, easy fabrication, and low cost. The metasurface-based STAR antenna is formed by four dual-polarized metasurface antennas, or units, and is used for both TX and RX to achieve monostatic operation. A wide operating bandwidth is obtained for each antenna unit by combining the resonate modes of the unit and a crossed slot, the feeding structure of the unit, using characteristic mode analysis (CMA). To achieve high TX/RX isolation and identical right-handed circular polarization (RHCP), the four TX and RX ports of the STAR antenna, respectively, are excited with equal amplitudes and relative phases of 0°, 90°, 180°, and 270°, by two dedicated-designed wideband feeding networks based on the sensitivity analysis. Accordingly, the proposed STAR antenna system is prototyped. The measurement results show that the STAR antenna system achieves >36 dB TX/RX isolation and <3 dB axial ratio from 4.5 to 6 GHz and maintains similar radiation patterns with the same RHCP for TX and RX. © 2023 IEEE.
KW - Circular polarization
KW - in-band full-duplex (IBFD)
KW - metasurface
KW - monostatic
KW - self-interference cancellation (SIC)
KW - simultaneous transmit and receive (STAR)
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85149398063&origin=recordpage
U2 - 10.1109/TAP.2023.3243988
DO - 10.1109/TAP.2023.3243988
M3 - RGC 21 - Publication in refereed journal
SN - 0018-926X
VL - 71
SP - 3304
EP - 3313
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 4
ER -