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:
Sep. 13, 1977
Filed:
Jan. 22, 1976
Applicant:
Inventor:
Christopher R Vale, Elkridge, MD (US);
Assignee:
Westinghouse Electric Corporation, Pittsbugh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ;
U.S. Cl.
CPC ...
333 72 ; 310318 ; 333-6 ;
Abstract
A filter array is provided for extracting velocity information from the return pulse of a Doppler radar system. The array consists of a plurality of two-pole, bandpass crystal filter networks directly connected in parallel, the filter networks including crystal resonators and all but one of the networks having reactances in series with the resonators. The crystal resonators are identical in all of the networks and the reactances change progressively in successive networks in such a manner that adjacent filter networks respond to contiguous frequency bands.