InP-Based THz Beam Steering Leaky-Wave Antenna

For mobile THz applications, integrated beam steering transmitters are essential. Beam approaches using leaky-wave antennas (LWAs) attractive in that regard since they do not require complex feeding control circuits and is simply accomplished by sweeping the operating frequency. To date, only a few LWAs have been reported. These based on polymer or graphene substrates thus, it quite impossible to monolithically integrate these with state-of-the-art indium phosphide (InP)-based photonic electronic sources receivers. Therefore, this article, we report an InP-based LWA for first time. The developed fabricated consists of periodic leaking microstrip line grounded coplanar waveguide (GCPW-MSL) transition future integration photodiodes. fabrication, substrate-transfer process silicon as carrier substrate 50-μm thin InP antenna chip has established. By changing frequency from 230 330 GHz, allows sweep direction quasi-linearly -46° 42°, i.e., total scanning angle 88°. measured average realized gain 3-dB width 1.5-mm wide ~11 dBi 10°. This article furthermore discusses use interconnects.