The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jul. 09, 2019

Filed:

Apr. 10, 2017
Applicant:

Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;

Inventor:

Yasuo Hidaka, Cupertino, CA (US);

Assignee:

FUJITSU LIMITED, Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/00 (2006.01); H05K 1/02 (2006.01); H05K 1/03 (2006.01); H05K 3/00 (2006.01); H01P 3/08 (2006.01); H05K 3/10 (2006.01); H05K 3/46 (2006.01);
U.S. Cl.
CPC ...
H05K 1/0245 (2013.01); H01P 3/08 (2013.01); H05K 1/024 (2013.01); H05K 1/0248 (2013.01); H05K 1/038 (2013.01); H05K 1/0313 (2013.01); H05K 1/0366 (2013.01); H05K 3/0091 (2013.01); H05K 3/10 (2013.01); H05K 3/4644 (2013.01); H05K 2201/0183 (2013.01); H05K 2201/07 (2013.01); H05K 2203/0195 (2013.01);
Abstract

A circuit may be configured to reduce electrical signal degradation. The circuit may include a first trace and a second trace that may be broadside coupled between a first ground plane and a second ground plane. The first and second traces may be configured to carry first and second signals, respectively, of a differential signal. The circuit may also include a first dielectric material disposed between the first trace and the second trace. Further, the circuit may include a second dielectric material disposed between the first trace and the first ground plane and disposed between the second trace and the second ground plane. A difference between a first dielectric constant of the first dielectric material and a second dielectric constant of the second dielectric material may suppress a mode conversion of the differential signal from a differential mode to a common mode.


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