Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2007-05-08
2009-11-17
Cho, James H. (Department: 2819)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S118000
Reexamination Certificate
active
07619495
ABSTRACT:
The bandpass filter comprises transmission line comprising a conductor strip (2), and, in said transmission line, at least one bandpass filter cell, comprising at least one split-rings resonator (6, 7), inductive element (4, 41) and capacitive element (3). The bandpass filter has a frequency response in which at least one passband can be identified. The conductor strip, split-rings resonator(s), inductive element(s) and capacitive element(s) are dimensioned and arranged so that the bandpass filter, for frequencies within said passband, behaves as a left-handed transmission line for at least one range of frequencies within said passband, and as a right-handed transmission line for at least another range of frequencies within said passband, thus providing for a large bandwidth. The invention also relates to an electronic device including the filter, and to a method of producing it.
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Jordi Bonache, et al., “Novel Microstrip Bandpass Filters Based on Complementary Split-Ring Resonators”, IEEE Transactions on Microwave Theory and Techniques, vol. 54, No. 1, pp. 265-271 (2006).
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Albacete Jordi Bonache
Barba Marta Gil
Cairo Molins Josep Ignasi
Galf Ignacio Gil
Garcia Garcia Juan Jose
Cho James H.
Hammond Crystal L
Harness & Dickey & Pierce P.L.C.
Seiko Epson Corporation
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