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:
Aug. 04, 1981
Filed:
Dec. 20, 1978
Applicant:
Inventors:
Steven W Eymann, Tempe, AZ (US);
Mark A Fried, Scottsdale, AZ (US);
Thomas L Harris, Scottsdale, AZ (US);
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
343 14 ; 343 / ;
Abstract
A narrow band CW FM fixed height altimeter system utilizing linear Bessel function signal processing wherein a J.sub.0 and a J.sub.1 Bessel function signal component are compared in a biased comparator to yield an output signal at a predetermined, relatively low altitude. The system provides a very small, accurate, low cost solution to the problem of identifying a very low and predetermined altitude.