Abstract: In this paper, a multifunctional scattering antenna array has been proposed to generate orbital angular momentum (OAM) vortex scattering wave and meanwhile reduce antenna radar cross section ...

Abstract: An approximate expression is derived for the phase velocity of wave propagation along an infinite Yagi structure and its dependence on the various parameters of the structure is discussed in ...

Video from the U.S. Geological Survey showed Kilauea volcano spewing lava more than 800 feet into the air in its latest eruption on Hawaii's Big Island. USGS said the eruption began around 4:15 p.m.