Dual polarized reflectarray antenna for operation in X and Ku bands

Abstract

A stacked structure element consists of an arc phoenix patch and an I‐shaped slot is proposed for designing dual‐band reflectarray antenna. The arc phoenix element operates at Ku band, which above the I‐shaped slot element operating at X band. The advantages of this configuration are that the smaller size phoenix element has less shielding of the reradiation energy, and the property of the bottom substrate has no effect on up‐layer due to the I‐shaped element severs as ground plane. Furthermore, two orthogonal polarizations are produced by the radiation characteristics of the slot and the metal strip to eliminate coupling. Based on the element, a reflectarray antenna with a dimension of 140 mm generating two focused beams at orthogonal plane has been simulated, fabricated, and measured. The simulated and measured results are in good agreement in X and Ku bands.

A wideband low‐profile dual‐circularly polarized reflectarray with decoupled LHCP/RHCP beams

“…1 Compared to the traditional metal reflector and phased array, planar RA has the advantages of low profile, [2][3][4] high gain, [5][6][7] low cost, 8 simple deployment and mobility, and is widely used in automotive/airborne radar, 9 satellite/space communication, 10,11 low-cost beam steering 12,13 and many other fields. The majority of existing RA designs are linearly polarized (LP) [8][9][10][11][12][13] and are susceptible to electromagnetic interference and multipath effect caused by complex environment, which easily leads to polarization misalignment and power transmission loss. 14,15 This problem can be effectively prevented by circularly polarized (CP) antennas due to the robustness of circular polarizations against environmental interferences.…”

“…Reflectarray (RA) combines the merits of reflector, phased array and printed antenna 1 . Compared to the traditional metal reflector and phased array, planar RA has the advantages of low profile, 2–4 high gain, 5–7 low cost, 8 simple deployment and mobility, and is widely used in automotive/airborne radar, 9 satellite/space communication, 10,11 low‐cost beam steering 12,13 and many other fields. The majority of existing RA designs are linearly polarized (LP) 8–13 and are susceptible to electromagnetic interference and multipath effect caused by complex environment, which easily leads to polarization misalignment and power transmission loss 14,15 .…”