Design of dual-bandpass hybrid waveguide-microstrip microwave filters

Mónica Martínez-Mendoza, Juan Sebastian Gomez Diaz, David Cañete-Rebenaque, Alejandro Alvarez-Melcón

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


A simple dual-bandpass filtering structure is proposed. The filter is implemented by means of a new hybrid waveguidemicrostrip technology. The novelty of the structure is that it combines two standard printed microstrip coupled line resonators, with a resonance of the base waveguide cavity, to implement a dual-band operation. Important aspects about the filter design, useful for practical applications are treated. This includes a study on the maximum coupling that can be achieved to the cavity resonance, and guidelines to control the positions of the two passbands and the transmission zeros. Besides, an example has been designed, manufactured and tested. The measurements on the fabricated prototype have confirmed the validity of the new structure to perform dual-band operation.

Original languageEnglish (US)
Article number4682671
Pages (from-to)2913-2920
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
StatePublished - Dec 1 2008
Externally publishedYes


  • Dual-band filter synthesis
  • Dual-band filters
  • Hybrid waveguide-microstrip technology
  • Microstrip resonators
  • Microwave filter

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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