Based on coordinate transformation techniques, a simplified all-dielectric extraordinary-transmission device for broadband transmission through a subwavelength aperture is verified experimentally in this paper. The device is made from isotropic dielectric blocks with permittivity values ranging from 2.1 to 6. It is shown both numerically and experimentally that the device can provide transmission with a −3 dB bandwidth of more than 1 GHz, in a region which would otherwise be a stop band caused by the subwavelength aperture in an X-band waveguide.
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2010
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