TY - JOUR
T1 - Frequency-diverse bunching metasurface antenna for microwave computational imaging
AU - Zhao, Mengran
AU - Zhu, Shitao
AU - Li, Die
AU - Fromenteze, Thomas
AU - Khalily, Mohsen
AU - Chen, Xiaoming
AU - Fusco, Vincent
AU - Yurduseven, Okan
PY - 2024/5/1
Y1 - 2024/5/1
N2 - A frequency-diverse bunching metasurface antenna(FDBMA) that can be used for microwave computational imaging(MCI) systems is proposed in this paper. The proposed FDBMA can generate low-correlated radiation patterns with a reduced frequency interval of 20 MHz and a bunching angle of 45° from 32to 36 GHz. The frequency interval is reduced by combining a disordered cavity and an optimized frequency-diverse random metasurface. The directivity of the radiation patterns is improved by leveraging the joint-bunching method that combines the metal baffle, the Fresnel dielectric lens, the quasi-gradient random metasurface, and the random-coherent superposition comprehen- sively. The performance of the proposed FDBMA is evaluated in terms of the reflection coefficient, SVD of the sensing matrix, and correlation coefficients of the measurement modes. The reduced frequency interval and the bunching characteristic are also demonstrated. Finally, MCI experiments are implemented using the proposed FDBMA. Comparative experiments are also carried out to validate the advantage of reducing the frequency interval and improving the directivity.
AB - A frequency-diverse bunching metasurface antenna(FDBMA) that can be used for microwave computational imaging(MCI) systems is proposed in this paper. The proposed FDBMA can generate low-correlated radiation patterns with a reduced frequency interval of 20 MHz and a bunching angle of 45° from 32to 36 GHz. The frequency interval is reduced by combining a disordered cavity and an optimized frequency-diverse random metasurface. The directivity of the radiation patterns is improved by leveraging the joint-bunching method that combines the metal baffle, the Fresnel dielectric lens, the quasi-gradient random metasurface, and the random-coherent superposition comprehen- sively. The performance of the proposed FDBMA is evaluated in terms of the reflection coefficient, SVD of the sensing matrix, and correlation coefficients of the measurement modes. The reduced frequency interval and the bunching characteristic are also demonstrated. Finally, MCI experiments are implemented using the proposed FDBMA. Comparative experiments are also carried out to validate the advantage of reducing the frequency interval and improving the directivity.
U2 - 10.1109/TAP.2024.3376020
DO - 10.1109/TAP.2024.3376020
M3 - Article
SN - 0018-926X
VL - 72
SP - 3950
EP - 3961
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 5
ER -