CHIRAL ELECTROMAGNETIC OBJECTS

A review is presented of some recent theoretical results in the resear ch and development work on artificial spatially dispersive media and o n structures possessing chiral properties in the microwave range. The results discussed are mainly obtained for chiral objects taken in the form of long helices of small radius to wavelength ratio, and of latti ces of such helices. These structures display strong polarisation-sele ctive resonance effects which give rise to a rich variety of electrody namic properties.