Title:
New Periodic-Loaded Electromagnetic Bandgap Coplanar Waveguide With Complete Spurious Passband Suppression
Author(s):
Ferran MartÃn, Francisco Falcone, Jordi Bonache, Txema Lopetegi,
Miguel A. G. Laso, Student and Mario Sorolla
Source:
IEEE Microwave and Wireless Components Letters
Vol./Issue/Date:
Vol. 12, No. 11, November
Year:
2002
Page(s):
435 - 437
Keywords:
Coplanar waveguide (CPW) technology, electromagnetic
band gap (EBG), microwave filters.
Abstract:
In this letter, coplanar waveguides (CPW) periodically
loaded with shunt capacitances and periodically perturbed by
varying the distance between the central strip (of constant width)
and ground planes are studied. It is demonstrated that the multiple
spurious passbands above the Bragg frequency, inherent to
the presence of the reactive elements, can be completely and efficiently
rejected by means of very simple geometry perturbation.
This result is in contrast to previous works, where the rejection of
multiple frequencies requires complex layout patterns and reveals
that the elimination of spurious frequency bands in periodic loaded
CPWs can not be merely estimated from the Fourier transform of
the perturbation geometry.
Document:
Reference Id:
120
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