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:
Apr. 19, 2011
Filed:
Apr. 23, 2009
Toru Ishii, Hirakata, JP;
Tetsu Nishimura, Toyonaka, JP;
Toru Ishii, Hirakata, JP;
Tetsu Nishimura, Toyonaka, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A radar device includes a transmission antenna and a reception antenna having a plurality of antenna elements. The radar device switches the antenna elements in synchronization with a modulation cycle, thereby obtaining a reception signal. At this time, the radar device obtains the reception signal by switching the antenna elements using a first measurement phase and a second measurement phase having different switching cycles as one set. The radar device calculates an azimuth sine value sin θfrom the reception signal in the first measurement phase and also calculates an azimuth sinusoidal value sin θfrom the reception signal in the second measurement phase. Then, the radar device calculates a relative velocity V from the azimuth sine value sin θ, the azimuth sine value sin θ, an interval time difference Δt between switching cycles, and an inter-antenna element spacing d.