Circularly polarized series-fed patch array for THz applications

A circularly polarized patch antenna array series-fed by a slot line is proposed to achieve a high gain for Terahertz applications. The antenna array consists of 24 pairs of hybrid patch elements, a slot feeding line based on high-resistance silicon, and a tapered dielectric transition transmitting the signal from the rectangular waveguide to the slot. Simulated results show that the proposed antenna exhibits a high gain up to 15.32 dBi, an axis ratio of 1.27 dB, and a reflection coefficient below -15 dB at 260 GHz.