High data rate transmission is required in future wireless communication systems (including 5G/B5G). Antennas are critical components for these systems. There is a growing demand for high-performance microwave, millimeter-wave and terahertz (THz) antennas. Many efforts have been devoted to the creation of high-performance antennas and associated technologies.

However, some conventional antenna design technologies have encountered difficulties in satisfying the stringent requirements in present communication systems. For example, conventional high-gain or high-efficiency antennas are parabolic reflector antennas or hollow waveguide-based antennas. Their bulky size and large profile make them unsuitable for integration with front-end planar circuits. Therefore, the demand of high-performance antennas using new techniques is increased significantly.

The aim of this Special Issue is to present novel designs of antennas using new techniques for 5G/B5G applications. We welcome original research and review articles.

Potential topics include but are not limited to the following:

• THz antennas
• Millimeter wave antennas for 5G New Radio
• Compact antenna design for Wi-Fi 6/6E/7 devices
• Metamaterials based antennas and meta-surfaces for 5G and beyond
• MIMO antenna design for handset and other wearable devices
• Antennas for future IoTs and vehicular communications
• Antenna in Package ( AiP ) technology
• Reconfigurable and flexible antennas
• Beamforming and phase-array designs for mobile communications
• Reconfigurable intelligence surfaces-assisted millimeter wave systems
• MIMO transmission via Reconfigurable intelligence surfaces