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:
Jan. 14, 2003
Filed:
Sep. 10, 2001
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
When a question signal of a transmitting frequency band &Dgr;F output from a radar device is received in search and rescue radar transponder (SART) of a wreck ship, a response signal is sent from the SART to the radar device. In the radar device, the response signal and an echo of the question signal are received as a reception signal, intensity of components of the reception signal placed in almost the same frequency band as the transmitting frequency band &Dgr;F of the question signal is suppressed to produce a filtered response signal, and components of he filtered response signal placed in a receiving frequency band &Dgr;F which does not overlap with the transmitting frequency band &Dgr;F of the question signal, are extracted from the filtered response signal as an image signal. Therefore, sea clutter and ground clutter indicated as the echo of the question signal is hardly included in the image signal, and a position of the wreck ship can be detected by using the image signal excellent in a signal-to-noise ratio. Accordingly, the radar device excellent in a detection performance of the position of the wreck ship can be obtained.