High efficiency excitation of dielectric rods using a magnetic ring current

Stephen M. Hanham; Trevor S. Bird

doi:10.1109/TAP.2008.923335

High efficiency excitation of dielectric rods using a magnetic ring current

Stephen M. Hanham^*, Trevor S. Bird

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We describe a theoretical analysis of the excitation of the fundamental HE₁₁ surface wave mode on an infinite dielectric rod by a magnetic ring current that is interior to the rod. Earlier work has provided results for an external ring source. Results obtained by us show that for an interior source excitation efficiencies close to 100% are possible for high permittivity dielectrics and launching efficiencies greater than 90% can be achieved over bandwidths greater than 20%. This is a higher efficiency than is possible with an exterior source. Simulation results verifying the theoretical analysis are presented for the practical case of a coaxial waveguide exciting the dielectric rod.

Original language	English
Pages (from-to)	1805-1808
Number of pages	4
Journal	IEEE Transactions on Antennas and Propagation
Volume	56
Issue number	6
DOIs	https://doi.org/10.1109/TAP.2008.923335
Publication status	Published - Jun 2008
Externally published	Yes

Keywords

Dielectric rod
Excitation efficiency
Magnetic ring current

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10.1109/TAP.2008.923335

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AU - Bird, Trevor S.

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AB - We describe a theoretical analysis of the excitation of the fundamental HE11 surface wave mode on an infinite dielectric rod by a magnetic ring current that is interior to the rod. Earlier work has provided results for an external ring source. Results obtained by us show that for an interior source excitation efficiencies close to 100% are possible for high permittivity dielectrics and launching efficiencies greater than 90% can be achieved over bandwidths greater than 20%. This is a higher efficiency than is possible with an exterior source. Simulation results verifying the theoretical analysis are presented for the practical case of a coaxial waveguide exciting the dielectric rod.

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KW - Excitation efficiency

KW - Magnetic ring current

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JF - IEEE Transactions on Antennas and Propagation

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High efficiency excitation of dielectric rods using a magnetic ring current

Abstract

Keywords

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