57results about How to "Increase reading and writing distance" patented technology

The invention discloses a UHF RFID label reader-writer, which consists of a control module, a transmission module, a receiving module and a base band processing module. The transmission module is controlled by the control module to provide a carrier signal, process the carrier signal and output the carrier signal to an electronic label. Meanwhile, the invention receives the reflecting signal fed back by the electronic signal and inputs the reflecting signal into the receiving module; the receiving module conducts variable frequency modulation of the reflecting signal fed back by the electronic label under a zero intermediate frequency, so as to realize two-way orthogonal decoding and output two-way base band signal; the base band processing module processes the two-way base band signal and acquires an effective signal that can be processed by the control module; at the same time, the control module receives and processes a two-way low frequency signal and resumes the signal into the original information of the electronic label.

The invention provides a radio frequency identification (RFID) tag circuit and method for calibrating clock signals. An RFID tag circuit counts the specific duration signal emitted by a reader-writer, adjusts the clock calibration bit segment according to the counting results and writes the clock calibration bit segment into a nonvolatile memory of the tag. During next electrifying, the tag needs not to calibrate the clock again and only needs to read the clock calibration bit segment from the nonvolatile memory and adopts the clock calibration bit segment to control the circuit of an oscillator of the tag to obtain accurate clock signals. The invention ensures the clock signals generated by the tag circuit to meet the requirement of RFID protocol, correctly decodes the data sent by the reader-writer to the tag, correctly posts data back to the reader-writer, simultaneously controls the power consumption of the tag and enlarges the read-write distance of the tag.

The invention discloses an RFID (Radio Frequency Identification) device, which is used for expanding reading/writing distance of an RFID and obtaining position information and/or environment information of the RFID in global range, such as indoor, outdoor open spaces, high-rise intensive region and the like. The RFID device comprises a GPS (Global Position System) collection unit, a main control unit and a communication unit; the GPS collection unit collects the position information and/or environment information of the RFID device by receiving GPS satellite signals and transmits information to the main control unit; the main control unit acquires types of communication information by polling the communication unit, and awakens the communication unit if the communication information is a position acquiring command; and the communication unit transmits effective position information and/or environment information acquired by the GPS collection unit to an appointed monitoring management center through network so as to display the corresponding position and/or track and/or environment of the RFID device according to the information.

The invention relates to the field of radio frequency identification (RFID), and provides an ultra-wide frequency band electronic tag. The tag comprises an antenna, a chip and a substrate, wherein the substrate is arranged in a rectangular shape for containing the antenna and the chip. A short circuit ring of the ultra-wide frequency band electronic tag can conveniently regulate the impedance of the antenna, and a special design loaded on a top end can greatly increase the bandwidth of the antenna. When the ultra-wide frequency band electronic tag is used, the chip is fixed on a base material through a solidification function, and the chip and the base material are formed into a whole. Through the structure and the combination of the structure, the ultra-wide frequency band electronic tag which exhibits long read-write distance and is suitable for various occasions is realized.

The invention provides a wiring management system, comprising a distribution frame suitable for connecting a plurality of ports of cable connectors, a plurality of first communication units, a plurality of second communication units and one or more control modules, wherein indicating elements are arranged on the distribution frame and correspond to at least part of ports; the plurality of first communication units are respectively detachably fixed on the corresponding cable connectors and located outside the ports when the cable connectors are inserted into the ports; at least part of the plurality of second communication units respectively correspond to one port, and the second communication units can communicate with the corresponding first communication units in a noncontact mode; and the one or more control modules are configured to control and read the communication between at least part of the first communication units and the second communication units. Meanwhile, the invention further provides a scalable distribution frame and a cable connector.

The invention relates to a design of a RFID reader-writer antenna, which pertains to the technical field of the design of RFID reader-writer antenna structure. Aiming at solving problems that the existing RFID low-frequency reader-writer has a short reading and writing distance, high power consumption and large copper loss, the design of the RFID reader-writer antenna of the invention comprises a rectangular hollow coil antenna formed by enwinding two Phi 0.15mm diameter copper enamelled wires in parallel and has two terminal ends, and two thrums of each terminal end are welded together, thus reducing the general diameter, the power consumption and copper loss, extending the reading and writing distance of the reader-writer and being most applicable to portable RFID reader-writer antennas with low frequency.

The invention relates to the field of RFID (radio frequency identification) and provides a wideband ceramic anti-metal tag. The wideband ceramic anti-metal tag comprises an antenna, a chip and a substrate, and the substrate holds the antenna and the chip which are matched with each other. The antenna comprises a radiation portion, an impedance regulating portion, a coplanar coupling portion and a ground plane, wherein the radiation portion, the impedance regulating portion and the coplanar coupling portion are positioned on the front face of the substrate, the ground plane is positioned on the back face of the substrate, and the impedance regulating portion and the ground plane are connected with the chip positioned on the side face of the substrate. The wideband ceramic anti-metal tag has the advantages that the wideband ceramic anti-metal tag is small in size; a Q value and spread bandwidth of the antenna can be decreased greatly by the aid of own special design, and the performance of the wideband ceramic anti-metal tag is superior to that of a common large-size anti-metal tag, so that the wideband ceramic anti-metal tag can be applied to many metal environments small in size and high in requirements on reading distance and bandwidth.

The invention relates to the field of RFID (Radio Frequency Identification) and provides a wideband ceramic anti-metallic label. The wideband ceramic anti-metallic label is characterized by comprising an antenna, a chip and a base plate, wherein the base plate is used for containing the antenna and the chip, and the antenna and the chip are matched; the antenna comprises a radiating part, an impedance-regulating part, a coplanar coupling part and a grounding surface, wherein the radiating part, the impedance-regulating part and the coplanar coupling part are positioned on the front surface of the base plate, the grounding surface is positioned on the back surface of the base plate, and the chip is positioned on the lateral surface of the base plate; the chip is connected with the impedance-regulating part and the grounding surface. The ceramic anti-metallic label has a small size, the Q value and the broadening bandwidth of the antenna can be greatly decreased through the special design of the antenna, and the performance of the ceramic anti-metallic label is superior to that of an ordinary large-sized anti-metallic label, so that the ceramic anti-metallic label can be conveniently applied to many metal environments which have smaller sizes and simultaneously have higher requirements on reading distances and bandwidth.

The invention provides a multi-directional near-field communication antenna device which comprises an insulating layer, a coil conductor, a flexible substrate and a magnetic material layer. The coil conductor comprises a first coil conductor and a second coil conductor, wherein the first coil conductor and the second coil conductor are respectively located on both sides of the magnetic material layer. The insulating layer is formed on the surface of the coil conductor. The flexible substrate is a substrate material for supporting the coil conductor. The magnetic material layer is arranged between the first coil conductor and the second coil conductor. The first coil conductor and the second coil conductor form a complete helical coil. The first coil conductor and the second coil conductor are non-symmetrical. The near-field communication antenna device provided by the invention enables an electronic device to form omnidirectional radiation along the top of a mobile electronic device to increase reading and writing distance.

The invention relates to a microstrip patch type RFID tag antenna. The RFID tag antenna (9) is provided with a radiant panel (1), a substrate (2) and a substrate base plate (3) and is characterized in that a first open circular groove (5) and a second open circular groove (7) are formed on the substrate base plate (3), by the aid of the coupling of the first open circular groove (5) and the second open circular groove (7), the resonant frequency of the RFID tag antenna (9) is reduced, and the reading distance of the RFID tag antenna (9) is increased. The RFID tag antenna (9) is miniaturized, low in loss and capable of achieving long-distance reading, simultaneously, the RFID tag antenna (9) is good in broadband matching performance, and the bandwidth frequency of the RFID tag antenna (9) is higher than that of the prior art.

The invention provides a clownfish wireless tag processing device, and the device comprises a reader-writer and an antenna in communication connection with the reader-writer. The device is characterized in that the reader-writer is electrically connected with a CPU, and the interior of the reader-writer is provided with a receiving and transmitting circuit; the interior of the receiving and transmitting circuit is provided with a transmitting module, a carrier counteracting circuit and a receiving module; the input end of the transmitting module is electrically connected with a modulation circuit, and the output end of the receiving module is electrically connected with a demodulation circuit; the carrier counteracting circuit is disposed between the transmitting module and the receiving module; the antenna is in communication connection with a radio frequency tag. The device is high in associative property of modules, is reasonable in setting of modules, is stable in operation, is small in size, is long in communication distance of wireless processing equipment, is low in error rate, and is wide in application range.

The invention discloses a high-accuracy loosely-coupled multi-level voltage output type power allocation circuit. In the high-accuracy loosely-coupled multi-level voltage output type power allocation circuit, a power decoupling conversion module is used to convert an alternating current in an industrial field into a low-voltage direct current, and the output end of the power decoupling conversion module is serially connected with a choking coil to eliminate the interference of a switching frequency about 300KHz on tag read-write signals; a high-accuracy two-level voltage stabilizing module can be used to ensure the power supply effect of an RFID integrated chip; a step-down adjustment module can be used to reduce the heat effect of voltage drop on a circuit board while being used to provide inputted voltage and current required by subsequent modules; a high-capacity energy storage capacitor of a transient high-current module is used to provide a high current required by an RFID power amplifier without reducing the voltage value sharply; a steady-state direct-current module is used to provide the power of a transaction controller; and a low-voltage microcurrent module is used to provide power for a high-frequency switch. According to the invention, all power supply noises are collected to the output end of the power decoupling conversion module, the interaction between all levels power supplies required by an RFID reader-writer can be shielded, and loosely coupling can be realized.

The present invention relates to the technical field of radio frequency identification, in particular to a rectifier and limiter circuit having a plurality of time constants and a passive radio frequency tag containing this rectifier and limiter circuit. By applying analog control signals with different time constants to control terminals of two discharge paths of the rectifier and limiter circuit, respectively, i.e., adjusting the voltage amplitude at different switching speeds, switching the two discharge paths from a completely open state to a completely closed state is realized. Discharging is performed properly according to the amount of charge at antenna terminals and the level of energy of the tag, thus to improve the demodulation capacity of the tag and increase the read-write distance of the tag.

The invention relates to the technical field of electronic communication, in particular to a bridging electric tuning antenna of an RFID reader-writer, which comprises an antenna shell and a coupled antenna, wherein a radiation antenna and a power divider are arranged in the antenna shell; one output end of the power divider is connected with the radiation antenna; wherein a wireless energy collection unit, a control unit and a tuning unit are arranged in the antenna shell; the other output end of the power divider is connected with the input end of the wireless energy collection unit; the output end of the wireless energy collection unit is used for supplying power to the control unit; the control unit is used for generating a triangular wave signal to the tuning unit; and the tuning unitis connected with the radiation antenna. According to the invention, the matching circuit can be automatically tuned according to the deterioration degree of the antenna performance, the antenna performance is optimized, and the read-write distance of the whole RFID reader-writer is increased; electromagnetic wave signals are collected and converted to supply power to the bridging electric tuningantenna, and extra external power supply is not needed.

The invention provides a card making substrate. The invention relates to a preparation method and an IC card or an electronic tag containing the same. wherein the card making substrate comprises an aluminized film layer, a bonding glue layer and a base material layer which are overlapped in sequence, at least one continuous scratch exists on the surface of the aluminized film layer, the depth of the scratch is greater than the thickness of an aluminum film in the aluminized film layer, and the scratch and the edge of the aluminized film layer divide the aluminum film in the aluminized film layer into at least two areas which are mutually connected; According to the invention, at least one continuous scratch is simply added to the surface of the aluminum-plated film layer in a common card-making substrate; The aluminum film is divided into at least two areas which are not connected with each other, so that the non-contact IC card or electronic tag manufactured by the card manufacturingsubstrate has a longer read-write distance, and meanwhile, the appearance effect of the aluminum-plated film with a laser effect is not damaged.

The invention provides an ultrahigh-frequency radio-frequency identification reading/writing device and method for an adaptive phase shift network. The device comprises a control module, a transmitting module for transmitting a writing tag signal, a directional coupling module, an antenna module, a phase shift network module used for generating a local oscillator signal orthogonal to a radio-frequency signal returned by a tag, a receiving module for receiving the radio-frequency signal returned by the tag and performing down-conversion on the radio-frequency signal to form a medium-frequency signal, an interface module and a power module. According to the ultrahigh-frequency radio-frequency identification reading/writing device and method for the adaptive phase shift network, the local oscillator signal of a frequency mixer is adjusted to be orthogonal to the radio-frequency signal returned by the tag through the phase shift network module, and the radio-frequency signal returned by the tag is subjected to frequency mixing to form the medium-frequency signal, so that the noise components in the output medium-frequency signal are greatly reduced, the demodulation capability and the tag reading/writing effect of the reading/writing device are effectively improved, and the reading/writing distance is increased.