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:
Apr. 11, 1995
Filed:
Dec. 16, 1992
Applicant:
Inventors:
Michael A Newell, Placitas, NM (US);
David R Heine, Albuquerque, NM (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ; H04B / ;
U.S. Cl.
CPC ...
333206 ; 333 33 ; 455 82 ;
Abstract
Ceramic block filters can be constructed to have non-symmetrical, i.e. unequal, input and output impedances. These filters can be used to eliminate impedance matching networks in radio communications devices. These impedance matching networks (22, 14) are precluded when the input and/or output of a ceramic block filter (100) is controlled by appropriate selection of the physical parameters of the block to achieve a direct impedance match between an adjacent circuit element and subsequent signal processing stages in the device.