Dual-polarized UWB antenna for high-resolution-imaging-systems

This paper presents a modified dual-polarized antenna for UWB-Imaging-Systems with high resolution. The antenna possesses several properties, which are advantageous for UWB-Radar, e.g. high polarization purity, same phase center of radiation for both polarizations, similar beamwidths in the relevant planes, constant delay of the impulse response over the angle etc. The measured radiation characteristics of the prototype are shown and an example of an UWB-Image is presented. The antenna enables microwave imaging with unique resolution, which is in the cm-range in the angle and range direction.