A novel 3D-metal-printing multi-beam orbital angular momentum (OAM)-generating transmitarray with dual-layer I-slot grating metasurface in the frequency range of 19-21 GHz is presented in this letter.

A rigorous coupled-wave model is proposed to simulate the diffraction characteristics of a concentric circular metal grating (CCMG) for an incident transverse-magnetic (TM) wave at terahertz frequency ...

A 10-story building made from cold-formed steel held up to a generated earthquake by the earthquake shake table at UC San Diego. They were testing the building material by reproducing the Bay Area ...