Wave transmission lines and networks – Long lines – Strip type
Reexamination Certificate
2005-09-27
2005-09-27
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Long lines
Strip type
C333S004000, C333S005000, C174S1170AS
Reexamination Certificate
active
06949991
ABSTRACT:
A technique for facilitating signal transmission at high signal frequencies in a multi-layer substrate is disclosed. In one embodiment a multi-layer substrate comprises a conductor or pair of conductors, a first dielectric layer on a first side of the conductor or pair of conductors and a second dielectric layer on a second side of the conductor or pair of conductors. An air channel is provided in the first dielectric layer, the air channel formed to be substantially coextensive with the conductor or pair of conductors. A conductive shield surrounds the conductor or pair of conductors, the first dielectric layer, and the second dielectric layer in order to eliminate crosstalk. The conductor or pair of conductors may have discrete spaced edges and the width of the conductor or pair of conductors may be increased in order to adjust the impedance because of the low dielectric constant of air. Furthermore, additional air channels and a supporting layer may be included in the structure.
REFERENCES:
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Goulette Richard R.
Handforth Martin R.
Kwong Herman
Hunton & Williams LLP
Lee Benny
Nortel Networks Limited
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