Surface-wave propagation on a grounded dielectric slab covered by a high-permittivity material

Ball, James A. R. and Horsfield, Brendan (2000) Surface-wave propagation on a grounded dielectric slab covered by a high-permittivity material. IEEE Microwave and Guided Wave Letters, 10 (5). pp. 171-173. ISSN 1531-1309

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Abstract

A grounded dielectric slab covered by a higher permittivity material would not normally be expected to support surface waves. This conclusion must be modified when the covering material is sufficiently lossy. Assuming a thin slab, approximate analysis shows that the fundamental TM0 surface wave is able to propagate if the cover loss is high enough. A numerical analysis has verified these conclusions. propagation of higher order TM and TE modes is found to be possible above cutoff frequencies, which reduce as cover loss is increased. These results are of significance when printed circuit transmission lines such as microstrip or slotline are used as contact sensors, e.g., for moist materials.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 30 Nov 2007 11:47
Last Modified: 05 Apr 2018 02:03
Uncontrolled Keywords: dielectric losses; dielectric measurements; electromagnetic surface waves; microstrip; microwave propagation; moisture measurments; moisture transducers; slotline
Fields of Research : 01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010301 Numerical Analysis
09 Engineering > 0906 Electrical and Electronic Engineering > 090605 Photodetectors, Optical Sensors and Solar Cells
09 Engineering > 0906 Electrical and Electronic Engineering > 090601 Circuits and Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1109/75.850367
URI: http://eprints.usq.edu.au/id/eprint/14067

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