This work describes wide-incident-angle radio-wave absorbers for millimeter-wave (mmW) and sub-terahertz (sub-THz) applications. A loop-shape frequency-selective surface (FSS) is employed to improve ...

Based on the parabolic approximation of Helmholtz equation, a three-dimensional (3-D) vector parabolic equation (PE) technique for predicting propagation loss in large region irregular terrain is ...