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:
Nov. 10, 1998
Filed:
Jan. 17, 1997
Applicant:
Inventor:
Gary H Shapiro, Albuquerque, NM (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333202 ; 333204 ; 333185 ;
Abstract
A laminated lowpass filter (100) is disclosed. The filter (100) has: a stack of dielectric substrates (301-312) having a ground via (209); a pi network coupled between an input (202) and an output (202'); and the ground via (209) is conductively filled and extends substantially through the sheets of dielectric (301-312) connecting a first ground plane (102) to a second ground plane (104) and is spaced a predetermined distance between a first and a second leg of the pi network, to define an isolation barrier that substantially minimizes the passage of stray signals therebetween.