A 28dBm-EIRP Low-Profile D-Band Transmitting Module with a Folded Transmitarray Antenna

This work presents the design and characterization of a high-gain transmitting module including a two-channel 45-nm CMOS transmitter and a folded transmitarray antenna. The proposed architecture enables the reduction by a factor three of the antenna height and a significant enhancement of the efficiency with respect to similar state-of-art D-band modules. The performance of this compact design is compared to that of an equivalent system with a standard transmitarray antenna, driven by the same integrated circuit. The experiments prove that the folded transmitarray preserves the effective isotropic radiated power (28 dBm at 148 GHz) achieved by the bulkier standard transmitarray, over the operating band of the integrated circuit, spanning from 139.3 GHz to 156.6 GHz.