TY - GEN
T1 - Phased Array With Improved Beamforming Capability via Use of Double Phase Shifters
AU - Xu, Zhaoyi
AU - Petropulu, Athina P.
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - The passive electronically scanned array (PESA) is widely used due to its simple structure and low cost. Its antenna weights have unit modulus and thus, only the weights phases can be controlled. PESA has limited degrees of freedom for beampattern design, where only the direction of the main beam can be controlled. In this paper we propose a novel way to improve the beamforming capability of PESA by endowing it with more degrees of freedom via the use of double phase shifters (DPS). By doing so, both the magnitude and the phase of the antenna weights can be controlled, allowing for more flexibility in the beampattern design. We also take into account the physical resolution limitation of phase shifters, and propose a method to approximate a given complex beamformer using DPS. Simulation results indicate significant beamforming improvement even at low phase resolution.
AB - The passive electronically scanned array (PESA) is widely used due to its simple structure and low cost. Its antenna weights have unit modulus and thus, only the weights phases can be controlled. PESA has limited degrees of freedom for beampattern design, where only the direction of the main beam can be controlled. In this paper we propose a novel way to improve the beamforming capability of PESA by endowing it with more degrees of freedom via the use of double phase shifters (DPS). By doing so, both the magnitude and the phase of the antenna weights can be controlled, allowing for more flexibility in the beampattern design. We also take into account the physical resolution limitation of phase shifters, and propose a method to approximate a given complex beamformer using DPS. Simulation results indicate significant beamforming improvement even at low phase resolution.
KW - Beampat-tern
KW - Double phase shifters
KW - Phased Array
UR - http://www.scopus.com/inward/record.url?scp=85135376436&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85135376436&partnerID=8YFLogxK
U2 - 10.1109/SAM53842.2022.9827712
DO - 10.1109/SAM53842.2022.9827712
M3 - Conference contribution
AN - SCOPUS:85135376436
T3 - Proceedings of the IEEE Sensor Array and Multichannel Signal Processing Workshop
SP - 66
EP - 70
BT - 2022 IEEE 12th Sensor Array and Multichannel Signal Processing Workshop, SAM 2022
PB - IEEE Computer Society
T2 - 12th IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2022
Y2 - 20 June 2022 through 23 June 2022
ER -