An Offset Reflectarray Antenna for Multipolarization Applications

• Published in: IEEE antennas and wireless propagation letters Vol. 15; pp. 1353 - 1356
• Main Authors: Chen, Yin-Yan, Ge, Yuehe, Bird, Trevor S.
• Format: Journal Article
• Language: English
• Published: New York IEEE 2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Bandwidth; Circular polarization; Dipole antennas; phase compensation technique; Polarization; polarization reconfiguration; reflectarray; Reflection; Reflector antennas; Substrates
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2015.2508919

A reflectarray that radiates linear or circular polarization (LP-CP) is proposed for multipolarization applications. The reflectarray consists of two double-layer dipole arrays that are orthogonally printed on both sides of the dielectric substrate. With a linearly polarized (LP) feeder, the antenna can transform the LP incident wave into a circularly polarized (CP) one. Both left-hand CP (LHCP) and right-hand CP (RHCP) waves can be obtained by rotating the LP feeder from the polarization angle of 45 ^\circ to 135 ^\circ . In addition, LP radiation can also be obtained when the polarization angle of the feeder is 0 ^\circ or 90 ^\circ . A 32 \times 32 -element reflectarray has been designed, fabricated, and measured. The measurements validate the simulated results. The 3-dB axial-ratio bandwidths obtained for the LHCP and RHCP cases are 16.3% and 16.8%, with peak gains of 30.8 dBi at 26.3 GHz, and 31.6 dBi at 26 GHz, respectively.