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:
Dec. 28, 1993
Filed:
Mar. 16, 1993
Applicant:
Inventors:
Hiroyuki Yatsuka, Kawasaki, JP;
Toshiyuki Morita, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
342 70 ; 342 71 ; 342100 ;
Abstract
A switching type FM-CW radar, the type of FM-CW radar improved to reduce FM-AM conversion noise, is further improved to reduce interference by radar waves from other vehicles and echo waves returned from them. A switching circuit is provided at the transmitter side, and its switching frequency is set at a different value for each individual vehicle. Furthermore, the switching frequency of an interfering wave is measured, in accordance with which the switching frequency of the switching circuit is changed.