A millimeter-wave wideband circularly polarized (CP) horn antenna with no requirement of an orthogonal mode transducer feeding is reported. The horn antenna has a simple structure, which consists of ...

A novel compact planar tapered-slot antenna for ground penetrating radar (GPR) system is proposed. The antenna is fed by a coplanar waveguide (CPW) and evolved from one slotline of the compact CPW.

The constructive interference of surface plasmon polaritons (SPP) launched by nanometric holes allows us to focus SPP into a spot of high near-field intensity having subwavelength width. Near-field ...