TY - GEN
T1 - Beamforming Characterization of a mmWave Single-bit Reflective Metasurface
AU - Shekhawat, Aditya S.
AU - Kashyap, Bharath G.
AU - Tjahjadi, Brian
AU - Trichopoulos, Georgios C.
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - We present a millimeter-wave (mmWave) 1-bit reflective metasurface that employs pre-coded phase randomization to suppress the undesired quantization lobes. The random phases are realized using delay lines integrated within each unit cell of the surface, thus breaking periodicity of the quantization error. The proposed surface consists of 800 elements arranged in a 25 × 32 array. A 3-layer implementation is adopted with the radiating elements at the top surface, the delay lines and switches at the bottom layer, and the ground plane in the middle layer. The layout is designed to operate at 28.5 GHz with a main beam directed toward + 30° when illuminated from boresight. We have fabricated the proposed reflective metasurface using printed circuit board (PCB) technology and characterized the beamforming using a mmWave radar cross section (RCS) measurement setup. A quantization lobe reduction of 14.5 dB is achieved with the proposed technique. The proposed topology is well suited for mmWave 5G communication scenarios to enhance signal coverage and signal-to-noise ratio (SNR).
AB - We present a millimeter-wave (mmWave) 1-bit reflective metasurface that employs pre-coded phase randomization to suppress the undesired quantization lobes. The random phases are realized using delay lines integrated within each unit cell of the surface, thus breaking periodicity of the quantization error. The proposed surface consists of 800 elements arranged in a 25 × 32 array. A 3-layer implementation is adopted with the radiating elements at the top surface, the delay lines and switches at the bottom layer, and the ground plane in the middle layer. The layout is designed to operate at 28.5 GHz with a main beam directed toward + 30° when illuminated from boresight. We have fabricated the proposed reflective metasurface using printed circuit board (PCB) technology and characterized the beamforming using a mmWave radar cross section (RCS) measurement setup. A quantization lobe reduction of 14.5 dB is achieved with the proposed technique. The proposed topology is well suited for mmWave 5G communication scenarios to enhance signal coverage and signal-to-noise ratio (SNR).
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U2 - 10.1109/AP-S/USNC-URSI47032.2022.9886912
DO - 10.1109/AP-S/USNC-URSI47032.2022.9886912
M3 - Conference contribution
AN - SCOPUS:85139773666
T3 - 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022 - Proceedings
SP - 1608
EP - 1609
BT - 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022
Y2 - 10 July 2022 through 15 July 2022
ER -