Photonic-Crystal Planar Antennas
Periodic dielectric structures have recently generated great interest because they can exhibit a forbidden range of frequencies, or photonic band gap, in the electromagnetic dispersion relation. In view of this property, these structures are called photonic crystals. They are well suited to electromagnetic-propagation and radiation-control applications, analogous to the current-transport and charge-control applications of semiconductors. An application that has recently been demonstrated at Lincoln Laboratory is the photonic-crystal planar antenna.
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