Title:
Left Handed Coplanar Waveguide Band Pass Filters Based on Bi-layer Split Ring Resonators
Author(s):
Francisco Falcone, Ferran Martín, Jordi Bonache, Ricardo Marqués, Txema Lopetegi and Mario Sorolla
Source:
IEEE Microwave and Wireless Components Letters
Vol./Issue/Date:
Vol. 14, No. 1, January
Year:
2004
Page(s):
10 - 12
Keywords:
Coplanar waveguide (CPW) technology, left
handed materials, microwave filters, split ring resonators.
Abstract:
A new type of compact band pass filters based on
planar structures with three metal levels is proposed. The central
layer consists on a coplanar waveguide (CPW) with periodic wire
connections between the central strip and ground planes. In the
upper and lower metal levels, split ring resonators (SRRs) are
etched and aligned with the slots. The wires make the structure
to behave as a microwave plasma, with a negative effective
permittivity covering a wide frequency range. SRRs, which are
magnetically coupled to the CPW, provide a negative magnetic
permeability in a narrow frequency range above their resonant
frequency. The result is a band pass structure which supports wave
propagation in a frequency interval where negative permittivity
and permeability coexist. The bandwidth of the structure can be
controlled by tuning the resonant frequency of the upper and
lower SRRs and the distance between SRRs. Fabricated prototype
devices exhibit very low insertion losses in the pass band ( 1 5
dB) and high frequency selectivity.
Document:
Reference Id:
78
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