Wideband Tuning of the Tunneling Frequency in a Narrowed Epsilon-Near-Zero Channel

Author

Mitrovic, Miranda ; Jokanovic, Branka ; Vojnovic, Nebojsa

Author_Institution

Inst. of Phys., Univ. of Belgrade, Belgrade, Serbia

Volume

12

fYear

2013

fDate

2013

Firstpage

631

Lastpage

634

Abstract

We propose a design of foam epsilon-near-zero (ENZ) waveguide with E- and H-plane step discontinuities at the same waveguide cross section. This enables using channel dielectric permittivity greater than the permittivity in input waveguides, which is required for foam ENZ waveguide realization. A method for wideband tuning of tunneling frequency by changing the length of two longitudinal slots was also proposed and experimentally verified. Simulated tuning range is 1.06 GHz, which is in a good agreement with experimentally achieved 0.99 GHz. This tuning range is accompanied by amplitude decrease of 1.6 dB.

Keywords

permittivity; rectangular waveguides; E-plane step discontinuities; ENZ waveguide; H-plane step discontinuities; channel dielectric permittivity; foam epsilon-near-zero waveguide; frequency 0.99 GHz; frequency 1.06 GHz; longitudinal slot length; loss 1.6 dB; narrowed epsilon-near-zero channel; rectangular waveguide; tunneling frequency; waveguide cross section; wideband tuning; ${rm E}$- and ${rm H}$-plane step discontinuity; epsilong-near-zero (ENZ) metamaterial; frequency tuning; rectangular waveguide;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2261046

Filename

6511993