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:
May. 16, 2000
Filed:
Dec. 11, 1998
Applicant:
Inventors:
Gerald D Harron, Martensville, CA;
Surinder G Kumar, Victoria, CA;
Assignee:
Wavecom Electronics Inc, , CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333202 ; 333177 ;
Abstract
A filter described which includes helical resonator elements constructed using printed circuit board (PCB) materials and fabrication techniques. A helical resonator element is formed from conductive traces on either side of a double sided PCB substrate with interconnection of the traces using plated through holes to form a three dimensional serpentine or helical conductor path. Multiple resonator elements are RF coupled using ferromagnetic coupling elements. The shape and number of the coupling elements may be selected to control RF coupling between resonator elements and the tuning of the filter.