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

被引：7

作者：

Horsfield, B ^{[1
]}

Ball, JAR ^{[1
]}

机构：

[1] Univ So Queensland, Fac Engn & Surveying, Toowoomba, Qld 4350, Australia

来源：

IEEE MICROWAVE AND GUIDED WAVE LETTERS | 2000年 / 10卷 / 05期

关键词：

dielectric losses; dielectric measurements; electromagnetic surface waves; microstrip; microwave propagation; moisture measurments; moisture transducers; slotline;

D O I：

10.1109/75.850367

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：171 / 173

页数：3

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