With ongoing progress in the constructionof artificialcomposites, chiralmaterialswill assume greatimportance.Such materialsoccur in natureas opticallyactivemolecules which displaycircularbirefringenceatopticalfrequencies.Since chiralityisa geometric concept,itis conceivablethatartificiallychiralcomposites can be made todisplaycircularbirefringenceeven atlower,perhaps microwave, frequencies.