High-Resolution Quartz Transmitarray Antenna for Sub-THz Applications

A high resolution (4-bit) anisotropic transmitarray (TA) for sub-THz applications is presented here. A simple numerical model is employed to design efficiently the TA unit-cell. A 50×50 element TA optimized at 280 GHz is designed. The antenna achieves a peak gain of 28.0 dBi with 53.7% aperture efficiency at 290 GHz. The effectiveness of the design methodology is demonstrated by the reduced gain loss (only 0.5 dB) with respect to the value achieved by an ideal lens for the same configuration.