Differential transmission line with common mode notch filter

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United States of America Patent

PATENT NO 9118516
SERIAL NO

14473636

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Abstract

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A differential transmission line with a common mode notch filter includes adjacently arranged, repeating differential transmission line pair sections. The sections have lengths that are each equal to half of an electric wavelength of a lowest frequency of a common mode electromagnetic wave to be suppressed during transmission of an electric signal over the differential transmission line. Each section includes a pair of conductors separated from one another by a spacing. The width of each conductor and the spacing between the conductors of each section vary over the length thereof according to a same pattern such that at every point over the length of each section a differential mode impedance of the differential transmission line is identical. A common mode impedance of the differential transmission line changes periodically in accordance with the lengths of the sections.

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Patent Owner(s)

Patent OwnerAddress
LENOVO INTERNATIONAL LIMITED23/F LINCOLN HOUSE TAIKOO PLACE 979 KING'S ROAD QUARRY BAY

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ao, Eric R Nepean, CA 12 66
Campbell, Alexander P Kanata, CA 14 204
Dignam, Donald R Ottawa, CA 6 27
Flint, Stephen J Ottawa, CA 10 45
Meng, Jian Kanata, CA 66 744

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