Phase and Group Velocities in Three-Dimensional Ideal Cloaks

Konferenz: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
23.03.2009 - 27.03.2009 in Berlin, Germany

Tagungsband: EuCAP 2009

Seiten: 5Sprache: EnglischTyp: PDF

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Martini, Enrica; Maci, Stefano (Department of Information Engineering, University of Siena, Via Roma, 56, 53100 Sien)
Yaghjian, Arthur D. (115 Wright Rd., Concord, MA 01742, USA)

Some interesting aspects of the field distribution inside an ideal spherical cloak are investigated. The Poynting vector, the local differential propagation constant and the phase velocity distributions are calculated for a plane wave illumination. Then, the group and energy transport velocities are considered and it is shown that they are equal only if the permittivity and permeability dyadics have the same frequency dependence around the cloak frequency.