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:
Dec. 21, 1982
Filed:
Mar. 30, 1981
Applicant:
Inventor:
Peter Vizmuller, Thornhill, CA;
Assignee:
Motorola Canada Limited, Willowdale, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ; H01P / ;
U.S. Cl.
CPC ...
333202 ; 333219 ;
Abstract
A helical resonator filter includes several helical coils, each grounded at one end and free at the other and enclosed within a cavity. The coils are coupled to each other electromagnetically through apertures in the conductive walls separating the resonator cavities from each other. A dielectric member is inserted into the apertures to increase coupling between adjacent coils to increase the bandwidth of the filter.