Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1997-01-15
1998-07-07
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333238, H01P 118, H01P 308
Patent
active
057775320
ABSTRACT:
A coplanar microwave transmission line on a substrate utilizes the interdigital capacitance between overlapped conducting fingers that extend from the conductors of the transmission line to reduce substantially the velocity of electromagnetic waves propagating on the transmission line without introducing prohibitive losses. The arrays of fingers extending from the conductors of the transmission line substantially overlap each other and are relatively densely packed. Layered substrates may be used to provide lower loss and a substantial reduction in velocity, which layered substrates may include layers of dielectric material located both above and below the conductors of the transmission line.
REFERENCES:
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patent: 4340873 (1982-07-01), Bastida
patent: 4460880 (1984-07-01), Turner
patent: 5150436 (1992-09-01), Jaeger et al.
patent: 5485131 (1996-01-01), Fajen et al.
patent: 5489880 (1996-02-01), Swarup
Buck G. Joseph
Ham Seungsook
TFR Technologies, Inc.
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