TY - GEN
T1 - Active CRLH-Based Antenna Feed Network for Enhanced Pattern Reconfigurability
AU - Qadeer, Neelam
AU - Li, Zhi
AU - Chordas-Ewell, Nathan
AU - Choi, Jun H.
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - This paper presents the design and simulation of an antenna feed network consisting of active and passive unit cells for adaptive beamforming. The feed network comprises four lines in a phased array configuration, enabling loss compensation, reconfigurable amplitude distribution, and frequency scanning. The simulations confirm the design's performance, and potential for advanced adaptive antenna applications, including achieving binomial amplitude distribution with additional active elements. The design, fabrication, and experimental validation of a passive and an active composite right/left-handed (CRLH) transmission line (TL) unit cell incorporating a transistor-based negative resistance (NR) circuit is also demonstrated. The simulated and measured results of both unit cells show good agreement. A comparison of the S-parameters reveals that the amplifier effectively compensates for the loss introduced by the passive CRLH-TL unit cell. The fabricated Active unit cell achieves realtime amplitude control, and phase consistency, paving the way for advanced applications such as reconfigurable antennas and adaptive imaging radar systems.
AB - This paper presents the design and simulation of an antenna feed network consisting of active and passive unit cells for adaptive beamforming. The feed network comprises four lines in a phased array configuration, enabling loss compensation, reconfigurable amplitude distribution, and frequency scanning. The simulations confirm the design's performance, and potential for advanced adaptive antenna applications, including achieving binomial amplitude distribution with additional active elements. The design, fabrication, and experimental validation of a passive and an active composite right/left-handed (CRLH) transmission line (TL) unit cell incorporating a transistor-based negative resistance (NR) circuit is also demonstrated. The simulated and measured results of both unit cells show good agreement. A comparison of the S-parameters reveals that the amplifier effectively compensates for the loss introduced by the passive CRLH-TL unit cell. The fabricated Active unit cell achieves realtime amplitude control, and phase consistency, paving the way for advanced applications such as reconfigurable antennas and adaptive imaging radar systems.
UR - https://www.scopus.com/pages/publications/105030881239
U2 - 10.1109/AP-S/CNC-USNC-URSI55537.2025.11266310
DO - 10.1109/AP-S/CNC-USNC-URSI55537.2025.11266310
M3 - Conference contribution
AN - SCOPUS:105030881239
T3 - IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
SP - 1145
EP - 1148
BT - 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/CNC-USNC-URSI 2025 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2025 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, AP-S/CNC-USNC-URSI 2025
Y2 - 13 July 2025 through 18 July 2025
ER -