Sub-THz Multi-beam Antennas for Virtualized Terminal Technology

The next mobile communications, such as Beyond 5G and 6G, are focusing on the use of sub-terahertz bands. The sub-terahertz band has significant propagation loss, so a virtualized terminal technology suitable for using the sub-terahertz band has been proposed. We have developed several sub-terahertz band multi-beam antennas for virtualized terminals. This paper demonstrates the effectiveness of the developed dielectric lens multi-beam antenna and Rotman lens-fed multi-beam printed antenna. The plano-convex lens multi-beam antenna achieves eight beams with a pitch of approximately 7.5 degrees cover ±30 degrees with a gain higher than 22.8 dBi. The spherical lens multi-beam antenna has sixteen beams with a pitch of approximately 4 degrees cover ±30 degrees with a gain higher than 26.7dBi. Furthermore, the Rotman lens-fed multi-beam printed antenna achieves five-beam with a 12-degree pitch.