Increasing the Supergain of Electrically Small Antennas Using Metamaterials
Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany
Proceedings: EuCAP 2009
Pages: 3Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Yaghjian, Arthur D. (Research Consultant, 115 Wright Road, Concord MA 01742 USA)
Uzkov’s determination of the maximum possible directivity (N2) of N isotropic acoustic radiators is generalized to antenna elements with the radiation patterns of crossed electric and magnetic dipoles (Huygens sources). In particular, it is shown that resonant Huygens-source elements forming an electrically small two-element parasitic (Yagi-like) array can, in principle, have a free-space gain as high as 9 dB. Two possible realizations of electrically small resonant Huygens sources are discussed: one modeled after an existing resonant miniature antenna, and a second consisting of resonant magnetodielectric spheroids.