A backward wave amplifier based on an NRI transmission-line metamaterial

Author

Weiss, Adam ; Grbic, A.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA

fYear

2014

fDate

6-11 July 2014

Firstpage

336

Lastpage

337

Abstract

Analysis of the coupling between an electron beam and a coaxial negative-refractive-index transmission-line metamaterial is presented. The electron beam is modeled as a spatially dispersive anisotropic permittivity, and the coaxial metamaterial is homogenized to derive its effective material parameters. The homogenized problem lends itself to an analytic coupled-mode dispersion relation. Solutions are obtained for both complex frequency and complex wavenumber, and all analytic results are verified through full-wave simulation. The work will find application in the design of backward wave amplifiers (BWA).

Keywords

amplifiers; electromagnetic metamaterials; electron beams; permittivity; transmission lines; BWA; NRI transmission line metamaterial; analytic coupled-mode dispersion relation; backward wave amplifier; coaxial metamaterial; coaxial negative refractive index; complex frequency; complex wavenumber; coupling analysis; electron beam; homogenized problem; spatially dispersive anisotropic permittivity; Couplers; Couplings; Dispersion; Electron beams; Metamaterials; Permittivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE

Conference_Location

Memphis, TN

ISSN

1522-3965

Print_ISBN

978-1-4799-3538-3

Type

conf

DOI

10.1109/APS.2014.6904500

Filename

6904500