Patent application number | Description | Published |
20090058604 | RFID TAG AND METHOD FOR CONTROLLING THE SAME - Disclosed are a Radio Frequency Identification (RFID) tag and a method for controlling the same which may receive/transmit data from/to an RFID reader even at a relatively long distance. The RFID tag includes a modulation unit for modulating data requested from an RFID reader to generate a first transmission signal including the modulated data, a transmission amplification unit for amplifying the generated first transmission signal to output a second transmission signal, and a transmission antenna unit for transmitting the outputted second transmission signal to the RFID reader. | 03-05-2009 |
20100013638 | APPARATUS AND METHOD FOR MANAGING PRODUCT DISTRIBUTION USING SECURITY TAG - Provided is a method and apparatus for managing a product distribution. The product distribution management method may include: reading a security key of a product from a security tag attached to the product; transferring the read security key to a security server; receiving, from the security server, first authentication information that is encrypted using the security key; receiving, from the security tag, second authentication information that is encrypted using the security key; and determining whether the security tag is duplicated, based on the first authentication information and the second authentication information. | 01-21-2010 |
20100017617 | RADIO FREQUENCY IDENTIFICATION (RFID) SECURITY APPARATUS HAVING SECURITY FUNCTION AND METHOD THEREOF - Disclosed are a radio frequency identification (RFID) security apparatus and a method thereof. According to the RFID security method, a secure tag reader performs determining an AES key using security information received from a secure tag and generating an output key using the determined AES key, decrypting AES data received from the secure tag using the output key, and encrypting data to be transmitted to the secure tag using the output key and transmitting the data, and a secure tag performs generating an output key using an AES key and security information, and transmitting the security information to a secure tag reader, encrypting data to be transmitted to the secure tag reader using the output key, and transmitting the encrypted data to the secure tag reader, and decrypting data received from the secure tag reader using the output key. | 01-21-2010 |
20100146273 | METHOD FOR PASSIVE RFID SECURITY ACCORDING TO SECURITY MODE - Provided are a method for passive radio frequency identification (RFID) security according to a security mode. An RFID tag transmits its own current security mode to a reader and the reader drives a security protocol depending on the current security mode of the RFID tag. Also, the reader grasps the ability of the tag and then the reader drive a protocol suitable for the ability through the security mode. | 06-10-2010 |
20110102151 | RFID READER AND METHOD FOR CONTROLLING GAIN THEREOF - Provided are an RFID reader and a method for controlling a gain thereof. The RFID reader includes an amplifier and an AGC circuit. The amplifier controls the gain of an RX signal, received from an RFID tag, in response to an AGC signal. The AGC circuit measures a signal level in an ante-preamble period of the RX signal and generates an AGC signal to control the gain of the RX signal, on the basis of the measured signal level. | 05-05-2011 |
20110140853 | RFID READER AND SIGNAL RECEIVING METHOD THEREOF - The present invention relates to an RFID reader and a signal receiving method thereof. The RFID reader according to one embodiment of the present invention down-converts transmission leakage signals introduced into a reader receiver and then suppresses them through a band stop filter in a low frequency band and up-converts them, thereby making it possible to effectively suppress the transmission leakage signals. | 06-16-2011 |
20120044053 | APPARATUS AND METHOD FOR IMPROVING RECEPTION SENSITIVITY OF RFID READER - An apparatus and method for improving reception sensitivity of a radio frequency identification (RFID) reader are disclosed. The apparatus includes a branch unit to separate an input signal into a first signal and a second signal; a first processing unit to convert a phase of the first signal; a second processing unit to extract a leakage signal from the second signal; and a control unit to output a tag response signal from the input signal using the converted first signal and the extracted leakage signal. | 02-23-2012 |
20130154804 | RADIO FREQUENCY SWITCH AND METHOD FOR CONTROLLING THE SAME, AND RADIO FREQUENCY IDENTIFICATION SMART SHELF SYSTEM - A radio frequency identification (RFID) smart shelf system manages a product through communication with an RFID tag that is attached to the product on a shelf, and includes an RFID reader, a plurality of reader antennas, and an RF switch that is connected between the RFID reader and the plurality of reader antennas. The RF switch periodically varies a phase difference between RF signals of a portion of a plurality of output connection ports that set a connection to each of the plurality of reader antennas. | 06-20-2013 |
20130214046 | READER ANTENNA AND RFID ELECTRONIC SHELF INCLUDING THE SAME - A reader antenna includes dipole antennas, the dipole antennas including: a horizontal dipole antenna having the characteristic of horizontal polarization; and a dipole antenna perpendicular to the horizontal dipole antenna and including a vertical dipole antenna having the characteristic of vertical polarization, wherein the horizontal dipole antenna and the vertical dipole antenna may both have the characteristic of circular polarization. The reader antenna can be easily stored in an electronic shelf because it is realized in an ultrathin structure using a single-layered dielectric substrate. | 08-22-2013 |
20140306805 | TAG APPARATUS FOR HIGH-RATE DATA TRANSMISSION AND COMMUNICATION METHOD THEREOF - A tag apparatus communicating with a reader acquires a command from a signal that is received from the reader, converts data corresponding to the acquired command to a plurality of multi-level parallel data, and generates a plurality of tag load impedances based on bias voltages that are mapped to correspond to each level of the plurality of parallel data. Therefore, a signal having electrical energy corresponding to the plurality of tag load impedances is transmitted to the reader. | 10-16-2014 |