300 GHz Quasi- Yagi Antenna Array

This study proposes a high-gain quasi- Yagi antenna array for J-band applications, fabricated using standard printed circuit board (PCB) technology. It operates with a -10 dB bandwidth of 14.3% centered at 291 GHz, achieving a simulated peak gain of 15.5 dBi, gain variation under 0.6 dBi, and above 50% radiation efficiency in the desired operating frequency band. The measured gain is 12.2 dBi. These outcomes make this antenna promising for IEEE 802.15.3d channel 67 for sub- THz communications.