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:
Jul. 16, 1996
Filed:
Mar. 31, 1995
Thomas McVeety, Albuquerque, NM (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A ceramic filter (10) is shown. The filter has a filter body of dielectric material, has top (14), bottom (16), and side surfaces (18, 20, 22 and 24), and further has metallized through holes extending from the top (14) to the bottom surface (16) defining resonators. A metallization layer substantially coats the top (14), bottom (16), and side surfaces (18, 20, 22 and 24), with the exception that a portion of one of the side surfaces is unmetallized in proximity to the bottom surface (16) and extends laterally between the resonators, defining a magnetic transmission line (32) for magnetically coupling alternate resonators. Also unmetallized are predetermined portions of the top and bottom surfaces which are alternately unmetallized, defining an interdigital configuration. Input-output couplings (34, 38) are included for coupling signals into and out of the filter. With this configuration, a desired frequency response can be obtained.