Transmitarray Antenna with Integrated Frequency Multiplier for High-speed D-band Communications in Low-cost PCB Technology

This contribution presents the design and experimental validation of a high-gain D-band fixed beam transmitarray excited by a compact antenna-in-package. Both the planar lens and the focal source are fabricated using standard printed circuit board (PCB) technology. An eight-fold frequency multiplier is co-integrated on the source and feeds a 2×2 patch array. The transmitarray is designed using eight phase states (i.e. 3 bits of phase quantization) and comprises 1600 unit cells (40 × 40). As per simulations, the -3-dB gain bandwidth ranges from 114 GHz to 144 GHz, with a peak gain of 29.5 dBi. An excellent agreement between measured and simulated radiation patterns is observed. The proposed concept represents a cost-effective solution for future wireless networks operating beyond 100 GHz.