Tuneable Interferometric Bandpass and Bandstop Filters for Terahertz Applications

Abstract

Numerically simulated performance of a new type of tuneable bandstop and bandpass filter is presented. The filters use 2x2 couplers loaded by discontinuity-assisted ring resonators (DARR). The bandstop filter consists of one or several cascaded DARRs. Two bandstop filters separated by a cavity make up the bandpass filter. Tuning is achieved by varying the geometrical or material parameters of the ring resonators or the cavity. Alternatively, when the device is used as a sensor, environmental conditions are monitored by their detuning effect. Selectivity and tuning range are controlled by the coupling coefficient of the couplers, by the circumference of the rings and by the reflection coefficient of the discontinuities. The effects of coupler and waveguide loss have also been investigated.

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 2000
Accession Number
ADP011766

Entities

People

  • Istvan Frigyes
  • Otto Schwelb

Organizations

  • Concordia University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandpass Filters
  • Bandstop Filters
  • Bandwidth
  • Bragg Gratings
  • Coefficients
  • Communication Systems
  • Composite Materials
  • Computer Programs
  • Couplings
  • Filters
  • Frequency
  • Intensity
  • Reflection
  • Refractive Index
  • Resonators
  • Scattering
  • Waveguides

Fields of Study

  • Physics

Readers

  • Microwave Engineering.