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.
Patent No.:
Date of Patent:
Feb. 19, 2002
Filed:
Jun. 16, 2000
Applicant:
Inventors:
Björn Albinsson, Göteborg, SE;
Thomas Harju, Sävedalen, SE;
Assignee:
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P 5/08 ;
U.S. Cl.
CPC ...
H01P 5/08 ;
Abstract
The present invention relates to an arrangement in multilayer printed circuit boards, with the aim of improving matching in transitions between symmetric striplines ( ) and asymmetric striplines ( ). The requirement of a coverpad ( ) for contact between the via ( ) and the asymmetric stripline ( ) for dimension reasons among other things, results in matching problems. In order to avoid this problem, the earth plane ( ) nearest the transition is moved away in the proximity of the via ( ).