Polarization diversity lens

Many airborne radar systems cannot take advantage of the target signature enhancements that can be achieved by receiving two orthogonal senses of polarization from the target on a pulse to pulse basis. Planar array polarization diversity can be achieved either mechanically or electrically. The mechanical devices are bulky, heavy, and extremely slow generally taking several seconds to change state. An electronic polarization switching lens may be integrated into the aperture and is compatible with electronic scanning. The switching is accomplished within a few microseconds. A method that would provide an add-on capability of pulse to pulse polarization switching to upgrade existing radar systems is presented.<>