Compact antennas are usually one-quarter the length of the wavelength being transmitted, but Virgina Tech engineers are claiming a 2.5-fold reduction in the size of an ultrawideband antenna. The compact UWB antenna (CUA) has a curved multi-element shape twisting around the inside of a spherical shape with a diameter just one-tenth that of the wavelength being transmitted.
Text: http://www.eetimes.com/showArticle.jhtml?articleID=210603887
