Next Article in Journal
NAVIS-An UGV Indoor Positioning System Using Laser Scan Matching for Large-Area Real-Time Applications
Next Article in Special Issue
Wireless Measurement of Elastic and Plastic Deformation by a Metamaterial-Based Sensor
Previous Article in Journal
Physiological Sensor Signals Classification for Healthcare Using Sensor Data Fusion and Case-Based Reasoning
Sensors 2014, 14(7), 11786-11804; doi:10.3390/s140711786
Article

Metallic Strip Gratings in the Sub-Subwavelength Regime

1,* , 1,2
 and
3
Received: 16 May 2014 / Revised: 18 June 2014 / Accepted: 25 June 2014 / Published: 4 July 2014
(This article belongs to the Special Issue Metamaterial-Inspired Sensors)
View Full-Text   |   Download PDF [2599 KB, uploaded 4 July 2014]   |   Browse Figures

Abstract

Metallic strip gratings (MSG) have different applications, ranging from printed circuits to filters in microwave domains. When they are under the influence of an electromagnetic field, evanescent and/or abnormal modes appear in the region between the traces, their utilization leading to the development of new electromagnetic nondestructive evaluation methods. This paper studies the behavior of MSGs in the sub-subwavelength regime when they are excited with TEz or TMz polarized plane waves and the slits are filled with different dielectrics. The appearance of propagating, evanescent and abnormal modes is emphasized using an electromagnetic sensor with metamaterials lens realized with two conical Swiss rolls, which allows the extraction of the information carried by the guided evanescent waves. The evanescent waves, manipulated by the electromagnetic sensor with metamaterial lenses, improve the electromagnetic images so that a better spatial resolution is obtained, exceeding the limit imposed by diffraction. Their theoretical and experimental confirmation opens the perspective for development of new types of sensors working in radio and microwave frequencies.
Keywords: sub-subwavelength regime; sensors with metamaterials; metallic strip grating; evanescent modes sub-subwavelength regime; sensors with metamaterials; metallic strip grating; evanescent modes
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Savin, A.; Steigmann, R.; Bruma, A. Metallic Strip Gratings in the Sub-Subwavelength Regime. Sensors 2014, 14, 11786-11804.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert