Periodic-surface-lattices for mm-wave Cherenkov sources

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Periodic surface lattices (PSLs) are passive components that when combined in appropriate configurations with an electron beam can create active RF devices that include novel mm-wave sources of radiation. A two-dimensional (2D) PSL can be obtained by creating shallow periodic perturbations on a metal surface. The periodic perturbations on the surface facilitate resonant coupling of surface fields and near cut-off volume fields which leads to the observation of a high-impedance surface, or effective metadielectric. Coupled volume and surface fields synchronise the radiation from individual lattice elements to form a cavity eigenmode. Cavities based on a PSL of cylindrical topology have been studied and an analytical description of the lattice dispersive properties is presented. Variations of the lattice dispersive properties for different parameter values are shown, illustrating the ability to tailor the electromagnetic properties of the structure. Under certain conditions, dispersion plots demonstrate the potential to create novel Cherenkov sources of coherent high power radiation.
Original languageEnglish
Title of host publication1st Annual Active and Passive RF Devices Seminar, 2013
Place of PublicationNew York
Pages23-26
Number of pages3
DOIs
Publication statusPublished - 26 Jun 2014
Event1st Annual Active and Passive RF Devices Seminar - Glasgow, United Kingdom
Duration: 29 Oct 201329 Oct 2013

Conference

Conference1st Annual Active and Passive RF Devices Seminar
Country/TerritoryUnited Kingdom
CityGlasgow
Period29/10/1329/10/13

Keywords

  • topology
  • cavity resonators
  • dispersion
  • milimetre wave propagation
  • electric impedance measurement

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