In this paper, a broadband double-ridge horn antenna (DRHA) covering 5G millimeter-wave (mm-wave) band is proposed, which maintains stable radiation pattern and gain in the entire band. By redesigning transition between coaxial waveguide, there no splitting or deterioration axis throughout 18-54 GHz frequency band, VSWRs are all below 2. Meanwhile, by replacing H-Side wall of with metal grid, v...

Series feeds are commonly used in antenna arrays because of their compact size and low loss compared to corporate but typically feature beam squint over wide bandwidths. This work proposes a series-fed waveguide horn array with reduced by introducing synthesized time delay sections between the horns feed line. The array, implemented WR42 waveguide, achieves 1.53° 4 GHz operating band, 10.52° fo...

In this paper applications of metamaterial has been discussed. Metamaterial is an artificial material which exhibits unique properties which cannot be achieved from the conventional materials. Metamaterial can be used as antenna substrate, feed networks, phased array antenna and antenna ground planes. Metamaterial can be used to increase the gain directivity and bandwidth of antenna. In body we...