Multi Band Multi Directional Slotted Waveguide Antenna for Sub Tera Hertz Communication and Imaging Applications

A novel design approach of sub-terahertz range multi band multi directional slotted waveguide antenna for high resolution imaging and future wireless networks is presented. The tilted slots are placed in both broadside walls of the waveguide for integrating two operating frequencies in a single antenna system. The rectangular slot radiator array for dual frequencies are placed in opposite directions to ensure dual directivity operation. The proposed antenna has been modified with a screen plate and ridges to improve the gain and directivity. The reflection coefficients of -23.27 dB for 220 GHz frequency and -18.73dB for 321 GHz frequency has been obtained during the simulation. The maximum gain of 14.7 dB and 13.2 dB are achieved for the above mentioned frequencies. The compact design, multi band and multi directional feature of this antenna work will very suitable for applications such as portable wireless repeaters and high resolution imaging sensor systems. The proposed antenna is designed and simulated with CST studio suite and validated by using Ansys HFSS software.