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. 12, 1978
Filed:
May. 24, 1976
Applicant:
Inventors:
Frank Sandy, Lexington, MA (US);
Manfred B Schulz, Sudbury, MA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ; H03H / ;
U.S. Cl.
CPC ...
333 72 ; 333 / ;
Abstract
A surface acoustic wave device having substantially all of the surface wave energy produced at an input transducer coupled to the output utilization means. Plural reflecting means upon the surface of a piezoelectric substrate reflect surface waves produced by the input transducer in plural directions. The passband characteristics of the device are determined by the interaction of the transfer properties of each of the reflecters as well as those of the input and output transducers. Devices are described having extremely low insertion loss and wide bandwidth with low sidelobes and steep passband skirts.