Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2006-03-07
2006-03-07
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S238000
Reexamination Certificate
active
07009467
ABSTRACT:
A multilayer coupled-lines directional coupler of the quarter wavelength type comprises a first, a second and a third conductive layer, joined by means of dielectric layers. The first conductive layer comprises a first and a second conductive strip, separated, mutually parallel, each in one end connected to a first output and in another end connected to a second output. The second conductive layer comprises a third conductive strip, parallel to the first and the second conductive strip, in one end connected to a third output and in another end connected to a fourth output. The first conductive layer comprises a fourth conductive strip, parallel to and located between the first and the second conductive strip, in one end connected to the third output, and in another end connected to the fourth output.
REFERENCES:
patent: 5313175 (1994-05-01), Bahl et al.
patent: 5629654 (1997-05-01), Frick
patent: 5745017 (1998-04-01), Ralph
patent: 6140886 (2000-10-01), Fratti et al.
patent: 6208220 (2001-03-01), Logothetis
patent: 19858470 (2000-06-01), None
patent: 11-150405 (1999-06-01), None
patent: 2000-165116 (2000-06-01), None
patent: 98/12769 (1998-03-01), None
Sachese et al; “Quasi-Ideal Multilayer Two- and Three-Strip Directional Couplers for Monolithic and Hybrid MICs”; In: IEEE Transactions on Microwave Theory and Techniques, Sep. 1999, vol. 47, issue 9, part 2, Sidorna, pp. 1873-1882.
Nixon & Vanderhye P.C.
Takaoka Dean
Telefonaktiebolaget LM Ericsson (publ)
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