Device-to-Device (D2D) communication has emerged as a promising technology for
optimizing spectral efficiency in future cellular networks. D2D takes advantage of the …

Physical layer security (PLS) has been extensively explored as an alternative to
conventional cryptographic schemes for securing wireless links. Many studies have shown …

By introducing metallic ring structural dipole resonances in the microwave regime, we have
designed and realized a metamaterial absorber with hierarchical structures that can display …

Here, we propose a fully metallic implementation of a Luneburg lens operating at Ka-band
with potential use for 5G communications. The lens is implemented with a parallel plate that …

Vehicular communication is one of the critical technologies in intelligent transportation
system to provide connectivity between vehicles, road side units, and pedestrians. Multiple …

This letter proposes a new design of millimeter-wave (mm-Wave) array antenna package
with beam steering characteristic for the fifth-generation (5G) mobile applications. In order to …

Here, we explain the principles of operating lens antennas, and discuss their potential
application for future 5G communications systems. We discuss the connection between the …

This article summarizes the recently discovered opportunities of geodesic lenses for
producing high-performing antennas for 5G/6G communications. First, we explain the …

Relays receive and retransmit signals between one or more sources and one or more
destinations. Cooperative relaying is a novel technique for wireless communications that …

A wideband snowflake antenna for 28 GHz millimeter-wave communications is proposed.
The antenna has a size of 8× 5 mm 2, fabricated on ultra-thin 0.254 mm substrate. The …