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. 20, 2011
Filed:
Apr. 30, 2007
Joungho Kim, Daejeon, KR;
Youngwon Kim, Daegu, KR;
Joungho Kim, Daejeon, KR;
Youngwon Kim, Daegu, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
A mobile radio-frequency identification (RFID) reader includes a high-frequency front-end unit including an antenna, a circulator, an output amplifier, and a signal processor chip. The signal processor chip includes a high-frequency transceiver, a pseudo-leakage signal generator configured to generate a pseudo-leakage signal based on a transmission high-frequency signal, the transmission high-frequency signal being provided from the high-frequency transceiver and being provided to the high-frequency front-end unit and a subtractor configured to subtract the pseudo-leakage signal from a received high-frequency signal to generate a subtracted signal, the pseudo-leakage signal corresponding to a transmission leakage signal included in the received high-frequency signal, the received high-frequency signal being provided from the high-frequency front-end unit, and the subtracted signal being provided to the high-frequency transceiver. Therefore, the RFID reader may eliminate a transmission leakage signal.