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:
Feb. 07, 2012
Filed:
Mar. 04, 2008
Wasuke Yanagisawa, Tokyo, JP;
Ryo Horie, Tokyo, JP;
Junxiang GE, Tokyo, JP;
Yokowo Co., Ltd, Tokyo, JP;
Abstract
To provide a smaller radar system having a simple structure with as small number of component parts as possible at a lower cost as compared to conventional ones. A radar systemincluding a 3 dB couplerhaving four terminals, and a pulse generator. A first terminalof the 3 dB coupleris supplied with an output signal from a high frequency oscillatorwhile a second terminalof the 3 dB coupleris connected to a transmitting and receiving antenna. Third and fourth terminalsandof the 3 dB couplerare connected to two-state devices, respectively, which are in impedance mismatched only for a predetermined period of time to totally reflect the signal from the 3 dB couplerand are in impedance matched during the time period other than the predetermined time to direct a signal from the 3 dB couplerto a subsequent electronic circuit. The pulse generatorcauses the two-state devicesto be impedance mismatched at the time of transmission and causes the two-state devicesto be impedance matched at the time of reception.