Physics

Bandwidth (computing)

Choke

Dipole antenna

Optics

Engineering

Multi-band device

Antenna (radio)

Acoustics

Scattering

Spiral antenna

Quantum mechanics

Telecommunications

Coaxial antenna

IEEE Antennas and Wireless Propagation Letters

This letter presents a novel distributed choking technique, the spiral choke, for scattering suppression in dual-band antenna arrays. The working principle and the scattering suppression capability of the choke are analyzed. The spiral chokes are implemented as low-band radiators in a colocated 4G and 5G dual-band array to suppress cross-band scattering while broadening the bandwidth of the choked element. The experimental results demonstrate that the cross-band scattering in the array is largely eliminated, and the realized dual-band array has very stable radiation performance in both well-matched bands.

Scattering Suppression in a 4G and 5G Base Station Antenna Array Using Spiral Chokes