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 ...

The discovery, made with the LOFAR (LOw Frequency ARray) radio instrument in Europe, indicates that galaxy clusters, which ...