Design of 1THz band 4array on-chip one-sided directional antenna

In this paper, we designed a terahertz-band on-chip slot array antenna for imaging devices. Terahertz (THz) waves are suitable for imaging devices for nondestructive, non-contact inspection due to their material permeability, like radio waves, spatial resolution, and many materials with absorption spectra in the terahertz frequency band. However, currently developed imaging devices using rectifier detectors have low detection sensitivity due to the low input voltage to the detector in the terahertz band. Therefore, in this study, a high-gain unidirectional (one-sided directional) slot array antenna for terahertz imaging is designed and fabricated using a minimal fab. The maximum gain was 4.32 dBi at 1.02 THz. 7.31 dBi at 1.02 THz for the array antenna improved the gain by about 3 dB by arraying.