Single-Layer Polarization-Insensitive Dual-Band Reflectarray

This letter presents a single-layer polarization-insensitive shared-aperture reflectarray (RA) operating at dual-band. First, based on the spin-decoupled strategy, and by setting the identical phase patterns individually for left-handed and right-handed circularly polarized (LHCP and RHCP) waves, th...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2024-12, p.1-5
Main Authors: Xu, Peng, Liu, Maliang, Luo, Xinyao, Zhang, Kunyi, Li, Ruijie, Xue, Hao, Li, Long
Format: Article
Language:English
Subjects:
Antenna measurements
Dual band
Encoding
Phase control
Polarization
polarization-insensitive operation
Reflection
Regulation
shared-aperture reflectarray
Single-layer
spin-decoupling
Substrates
Wireless communication
Wireless sensor networks
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Summary:This letter presents a single-layer polarization-insensitive shared-aperture reflectarray (RA) operating at dual-band. First, based on the spin-decoupled strategy, and by setting the identical phase patterns individually for left-handed and right-handed circularly polarized (LHCP and RHCP) waves, thereby the polarization-insensitive operation is deduced. Then, the RA element composed of the outer K element with a concentric split ring configuration and the inner Ka element with a Malta cross configuration is designed to operate at Ka- and K-band, respectively. Subsequently, by considering the mutual influence between the RA elements operating at K- and Ka-band, 2-bit phase coding for the K element and 3-bit phase coding for the Ka element is proposed. Finally, the dual-band polarization-insensitive RA is designed, fabricated, and measured. The measured results are in good agreement with the simulated ones, realizing the similar focusing behavior under full-polarized incident waves at dual-band, and the polarization states of the generated beams are determined by the polarization states of the feed source.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2024.3510751