Title :
A concentrically corrugated near-field plate
Author :
Imani, Mohammadreza F. ; Grbic, Anthony
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
We present a concentrically corrugated near-field plate which can form a subwavelength near-field focus. The experimental plate consists of a coaxial aperture surrounded by non-periodic concentric corrugations. The measured subwavelength patterns are compared to those created by a coaxial probe with similar dimensions and are shown to be narrower. Excellent agreement between measurements and simulated results is observed. Finally, the frequency response of the plate is experimentally studied. The presented near-field plate will find applications in near-field probing.
Keywords :
metamaterials; plates (structures); coaxial aperture; coaxial probe; concentrically corrugated near-field plate; frequency response; near-field probing; nonperiodic concentric corrugations; subwavelength near-field focus; subwavelength patterns; Apertures; Coaxial components; Corrugated surfaces; Electromagnetic diffraction; Energy resolution; Focusing; Holography; Microscopy; Optical surface waves; Probes; corrugated surface; diffraction limit; focusing; metamaterials; near field;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5517888
