Broadside couplings for high-selectivity microstrip filters

  • Alejandro Alvarez Melcón /
  • Juan R. Mosig /
  • Marco Guglielmi
Journal ar
Microwave and Optical Technology Letters
  • Volumen: 30
  • Número: 5
  • Fecha: 05 September 2001
  • Páginas: 295-302
  • ISSN: 08952477
  • Source Type: Journal
  • DOI: 10.1002/mop.1295
  • Document Type: Article
This paper describes a number of broadside-coupled microstrip structures and their use for the implementation of high-selectivity multilayered filters. The broadside configuration allows for the introduction of cross couplings between nonadjacent resonators. The cross couplings can then be used to implement transmission zeros that can significantly increase the selectivity of the filters. Furthermore, the investigation shows that the amount of coupling can be considerably increased if the resonators are broadside coupled, thus easily allowing the implementation of broadband filters. Measured results are shown to agree with predictions, thereby fully validating the new structures described. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett.

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