An experimental investigation of subwavelength imaging by a wire medium slab is performed. A complex-shaped near field source is used in order to test imaging performance of the device. It is demonstrated that the ultimate bandwidth of operation of the constructed imaging device is 4.5% that coincides with theoretical predictions [P. A. Belov and M. G. Silveirinha, Phys. Rev. E 73, 056607 (2006)]. Within this band the wire medium slab is capable of transmitting images with resolution irrespective of the shape and complexity of the source. Actual bandwidth of operation for particular near-field sources can be larger than the ultimate value, but it strongly depends on the configuration of the source.
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See EPAPS Document No. E-APPLAB-89-228652 for results of the near-field scan at 23 frequencies from 840 to 106 MHz with 10 MHz step. This document can be reached via a direct link in the online article’s HTML reference section or via the EPAPS homepage (http://www.aip.org/pubservs/epaps.html).
© 2006 American Institute of Physics.
2006
American Institute of Physics
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