Passive Enhancement of Resonator Q in Microwave Notch Filters

Abstract

The lumped-element bridged-T notch filter concept is extended to reciprocal distributed-element microwave filters. A prototype microstrip bridged-T notch filter employing single-mode resonators is described that enhances the effective resonator Qu by a factor of 325, while a different microstrip filter topology with a triple-mode resonator is described that enhances the effective resonator Qu by a factor of 89. The new notch filters can be either partly reflective or fully absorptive within the stopband. Additional enhanced-Qu notch filter topologies, such as a hybrid-coupler notch filter, that include at least two resonances and at least two signal paths are suggested.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2004
Accession Number
ADA537650

Entities

People

  • Douglas R. Jachowski

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Bandstop Filters
  • Couplings
  • Delay Lines
  • Filters
  • Frequency
  • Impedance
  • Microwave Filters
  • Microwaves
  • Notch Filters
  • Patents
  • Prototypes
  • Resonance
  • Resonant Frequency
  • Resonators
  • Topology
  • Transmission Lines
  • Tuning

Fields of Study

  • Engineering
  • Physics

Readers

  • Microwave Engineering.

Technology Areas

  • Microelectronics