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7 - Surface wave antennas

Published online by Cambridge University Press:  06 July 2010

Fan Yang  and
Yahya Rahmat-Samii
Fan Yang
Affiliation:
University of Mississippi
Yahya Rahmat-Samii
Affiliation:
University of California, Los Angeles
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Summary

The concept of surface wave antennas (SWA) was initiated in the 1950s [1–2] and numerous theoretical and experimental investigations have been reported in the literature [3–10]. To support the propagation of surface waves, a commonly used structure in SWA designs is a corrugated metal surface. However, the corrugated structure is thick, heavy, and costly, which may limit the applications of surface wave antennas in wireless communication systems.

In this chapter, novel surface wave antennas are presented. Compared to traditional SWA designs, surface waves are now guided along a thin grounded slab loaded with periodic patches, resulting in a low profile conformal geometry. In contrast to the previous wire-EBG antennas or patch antennas that radiate to the broadside direction, the proposed SWA achieve a monopole-like radiation pattern with a null in the broadside direction. The low profile SWA is more attractive than a traditional monopole antenna that is a quarter-wavelength high.

A grounded slab loaded with periodic patches

Comparison of two artificial ground planes

We start with analyzing a complex artificial ground plane, which will be subsequently used in surface wave antenna designs. Figure 7.1 shows two artificial surfaces: a mushroom-like EBG surface and a grounded dielectric slab loaded with periodic patches. In the latter structure vertical vias are removed, which results in different surface wave properties in the two ground planes.

To compare the electromagnetic properties of these two structures, the finite difference time domain (FDTD) method is used to simulate their performance [11–12].

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Electromagnetic Band Gap Structures in Antenna Engineering , pp. 203 - 237
Publisher: Cambridge University Press
Print publication year: 2008

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References

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  • Surface wave antennas
  • Fan Yang, University of Mississippi, Yahya Rahmat-Samii, University of California, Los Angeles
  • Book: Electromagnetic Band Gap Structures in Antenna Engineering
  • Online publication: 06 July 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511754531.008
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  • Surface wave antennas
  • Fan Yang, University of Mississippi, Yahya Rahmat-Samii, University of California, Los Angeles
  • Book: Electromagnetic Band Gap Structures in Antenna Engineering
  • Online publication: 06 July 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511754531.008
Available formats
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Save book to Google Drive

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  • Surface wave antennas
  • Fan Yang, University of Mississippi, Yahya Rahmat-Samii, University of California, Los Angeles
  • Book: Electromagnetic Band Gap Structures in Antenna Engineering
  • Online publication: 06 July 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511754531.008
Available formats
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