Abstract: A compact printed planar antipodal Vivaldi antenna (AVA) array with high gain is presented. First, a novel method based on adding line-type defected ground structures (DGSs) between adjacent ...

The present work focusses upon the realization of the concentric ring sparse array antenna using fractal structures. It demonstrates high sparsity and low SLL features in the resulting designs and ...

reconstructed using PHANGS-Atacama Large Millimeter/submillimeter Array observations of the molecular gas as a dynamical tracer. Our analysis of the four galaxies targeted in this work indicates that ...