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:
Oct. 06, 1998
Filed:
Jan. 31, 1997
John C Estes, Albuquerque, NM (US);
Richard Kommrusch, Albuquerque, NM (US);
Rong Fong Huang, Albuquerque, NM (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A laminated lowpass filter (100) is disclosed. The filter (100) has: a stack of dielectric substrates (301-312) having a ground via (118); a pi network coupled between an input (202) and an output (202'); a first leg comprising a first transmission line (608) and a first capacitance (C1) connected to a top ground plane (GP1); a second leg comprising a second transmission line (608') and a second capacitance (C2) connected to a bottom ground plane (GP2); a middle leg including a transmission line (606) is between the first and second leg; the single point ground plane configuration prevents ground loops and minimizes the passage of stray signals through the laminated lowpass filter (100).