Wideband Polarization Rotation Transmitarray Using Arrow-Shaped FSS at W-Band

Based on the passband characteristics of frequency selective surface (FSS), a wideband transmitarray (TA) with linear polarization rotation at W-band is proposed. The middle layer of the unit cell is a pattern of arrow-shaped structure, which can rotate the incoming wave by 90 degrees. A pair of parallel strip polarizers is employed to enhance the polarization conversion efficiency. The prototype of 25 x 25-element TA is fabricated by the standard PCB technology. Within the 3 dB gain bandwidth of 20%, the measured peak gain of 28.7 dB with the corresponding aperture efficiency of 38.2% is achieved. The error analysis is also conducted by comparing the simulation and measurement. The performance of the proposed TA demonstrates that it is a suitable solution for wideband and low-cost applications in the millimeter-wave spectrum.

Automated summary

This paper presents a wideband transmitarray (TA) with linear polarization rotation based on the passband characteristics of frequency selective surface (FSS). By using a pattern of arrow-shaped structure and polarizers, the TA achieves high performance and is suitable for wideband and low-cost applications in the millimeter-wave spectrum.