Design Method of Microstrip Sub-terahertz Leaky Wave Antenna

Sub-terahertz band from 100 GHz to 300 GHz has gained attention for many applications. The leaky wave antennas have been studied for sub-terahertz antenna for the requirement of high gain and beam scanning. The leaky wave antenna can change the beam direction by sweeping frequency. This paper presents the design method of the unit cell of sub-terahertz leaky wave antenna for the sidelobe reduction. The circular patch with the microstrip line is employed for the unit cell shape on dielectric substrate for the ease of fabrication. The unit cell can produce the leaky wave radiation and control the power of leaky wave per unit cell by adjusting the dimensions for sidelobe level reduction. The sub terahertz leaky wave antenna with 100 -unit cell is demonstrated in the simulation. The simulation result shows the designed leaky wave antenna achieves beam scanning and sidelobe reduction with the operating frequency from 152-164 GHz.