A Novel Approach for Designing Omnidirectional Slotted-Waveguide Antenna Array

This paper presents a novel design of a high-gain omnidirectional slotted-waveguide antenna array for 5G mm-wave applications. The structure is based on a circular waveguide filled with teflon for manipulating its dimension. It provides 12,1 dBi gain and omnidirectional coverage in the azimuth plane with only 1.3 dB deviation, which is ensured by making use of a twisting technique for proper placing the slots into the waveguide walls. A bandwidth of 1.61 GHz centered at 26.2 GHz has been numerically demonstrated

Millimeter Wave Beam Steerable/Reconfigurable Liquid Metal Array Antenna

This paper presents a mm-wave beam steerable/reconfigurable phased array antenna incorporating Eutectic Gallium Indium Alloy (EGaIn) liquid metal switches. The antenna operates at 26.2 GHz and has a scan range of ±58° which yields a ±40° improvement in scan range over a conventional dipole phased array antenna at a side lobe level of or better than 8.8 dB. Moreover the beam scanning approach proposed here supports continuous beam steering over a much wider scan angle range than is possible with conventional techniques