58results about How to "Increase reading and writing distance" patented technology

The invention discloses a compound magnetic conductive plate used for wireless charging and near field interference resistance and a preparation method thereof. The compound magnetic conductive plate comprises a top-layer material, a middle-layer material and a lowest-layer material, wherein the top-layer material and the lowest-layer material are both compound slices compounded by soft magnetic powder and resin materials; the middle-layer material is a combination body of at least one layer of magnetic metal slice or a compound slice combined by a magnetic metal slice and the soft magnetic powder and the resin material, wherein one surface or two surfaces of the magnetic metal slice are adhered with double faced adhesive tape; the top-layer material, the middle-layer material and the lowest-layer material are subjected to one-time forming after being subjected to hot pressing. When an NFC (Near Field Communication) function is carried out, enough permeability is provided so as to guarantee an enough communication distance and meet NFC requirements; meanwhile, the NFC function can be prevented from disturbing other processors. Correspondingly, other processors can be prevented from distributing an NFC antenna.

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 ultra-short spacing quasi-Yagi anti-metal antenna which comprises a director dipole, a first dielectric plate, an active dipole, a second dielectric plate and a reflector laminated sequentially. The director dipole and the active dipole are metal thin layers, on which a multi-folded vibrator image is etched. The reflector is a metal thin layer. The metal thin layers of the active dipole, the director dipole and the reflector are in parallel to each other. The active dipole and the director dipole are in staggered arrangement and the central axis in the normal direction of the active dipole and the director dipole are not coincident to each other. The interfering energy caused by a metal object is converted into the available component for increasing the read-write distance of an RFID device. Meanwhile, the complex structure, such as EBG, is avoided, and a planar folding structure with convenient manufacture can be realized by adopting the simple printed circuit manner. Moreover, the adopted high-frequency dielectric plate belongs to the domestic products in mass production with low cost. In addition, compared with the conventional quasi-Yagi antenna, the quasi-Yagi anti-metal antenna has the advantages of greatly reduced size and anti-metal performance while maintaining high gain.

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 belongs to the technical field of radio frequency identification, and particularly relates to a rectifying and amplitude limiting circuit with multiple time constants, and a passive radio frequency tag containing the rectifying and amplitude limiting circuit. By applying different time constants on the control ends of two discharging paths of the rectifying and amplitude limiting circuit, namely that the analog control signals with adjusted voltage amplitude can be carried out at different switching speeds, so the switching between complete opening and complete closing of the two discharging paths is realized; the applicable discharging is carried out according to the size of charge amount at the antenna end and the energy level of the tag, so the demodulation level of the tag is improved, and the reading and writing distance of the tag is improved.

The invention discloses a ferrite sheet. The ferrite sheet comprises the following components in parts by weight (counted by 100 parts of NiCuZn ferrite powder): 2-8 parts of a binding agent, 1-6 parts of a plasticizer and 20-100 parts of a solvent. The invention further discloses a preparation method of the ferrite sheet. According to the ferrite sheet prepared by virtue of the preparation method, under the frequency of 13.56MHz, the complex permeability real part mu' is 140-200, the complex permeability imaginary part mu'' is 1-6, and the thickness is 30-120 microns; the ferrite sheet has certain flexibility; by increasing the magnetic conductivity mu' of the ferrite sheet, the magnetic field intensity reduced due to the decrease of the thickness is compensated, and the capacity of the ferrite sheet for gathering electromagnetic signals is improved, so that the read-write distance of an NFC mobile phone is improved.

The invention discloses an ultrahigh frequency radio frequency identification reader-writer. The reader-writer at least comprises an antenna, coupling equipment, a receiving module, an emitting module, a digital processing circuit, a local oscillation generating circuit and other circuit modules, wherein the local oscillation generating circuit comprises two phase-locked loop circuits and a frequency mixer; one phase-locked loop circuit outputs a first coarse tuning working frequency band with a relatively large frequency hopping step length; the other phase-locked loop circuit outputs a second fine tuning working frequency band with a relatively small frequency hopping step length; and local oscillation needed by the reader-writer is obtained by frequency conversion on the frequency mixer. Therefore, phase noise of the reader-writer is optimized greatly and the reading and writing sensitivity and reading and writing distance of the reader-writer are enhanced obviously; moreover, information security is enhanced to a certain extent through large-range frequency hopping.

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 relates to a backward reflecting modulation tag with light as a medium and a reader-writer system. A tag body and a reader-writer are included. The tag comprises a thin film solar cell panel which is used for obtaining energy from light emitted by the reader-writer and ambient light, a backward reflecting thin film for backward reflecting, a liquid crystal light valve for carrying out modulation on light reflecting, a liquid crystal light valve modulation circuit and a first photosensitive diode for receiving reader-writer signals. The liquid crystal light valve adheres to the backward reflecting thin film. The reader-writer comprises an LED for emitting visible light or infrared light, an LED driving and modulation circuit, a microcontroller, and a second photosensitive diode. The backward reflecting modulation tag has the advantages that the passive tag-tag reader-writer system with light as the medium is provided, through the backward reflecting features of the backward reflecting thin film on light, compared with radio-frequency signals, the decay rate is greatly lowered, the tag body uses the thin film solar cell, reading-writing distance is improved, and the power consumption of the reader-writer is lowered.

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 the field of radio frequency identification (RFID) and provides a passive radio frequency identification tag. The tag comprises an antenna, a chip and a substrate. The substrate which is in rectangle arrangement accommodates the antenna and the chip, wherein the antenna is matched with the chip. The antenna comprises a short circuit ring and a dipole, wherein the short circuit ring is arranged on the bottom of the substrate. The dipole is provided with a left arm and a right arm. The left arm is formed by two square waves and a top loading, wherein the tail ends of the two square wave sections are in quadrature connection; one square wave is connected with the short circuit ring; and the other square wave is connected with the top loading which is rectangular in shape. The left arm and the right arm are in mirror image arrangement. The chip is positioned on the short circuit ring near the edge of the substrate. The passive radio frequency identification tag is pasted on an object during usage; the chip is positioned at the place, near the edge of the substrate, of the tag, so that bar codes, characters, patterns and the like information can be printed on the back of the tag conveniently and the chip can be prevented from being crushed during printing, and the tag can be applied to various occasions conveniently.

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 a thin-film material for near field communication (NFC) equipment, and a preparation method and application for the thin-film material. The thin-film material is formed by compounding a polyethylene terephthalate (PET) plastic film and sheet ferro-silicon-based alloy powder serving as a base material; and the sheet ferro-silicon-based alloy powder is adhered to the surface of the PET plastic film and is parallel to the PET plastic film. By an embodiment of the invention, a phenomenon that inductive alternate electromagnetic signals are affected by metal structural parts and then eddy current loss is caused is avoided, and the accuracy, the sensitivity and the read-write distance in data reading and writing of an NFC chip are increased.

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 relates to an antenna apparatus of an identification system, especially relating to an RFID antenna system. The RFID antenna system comprises a built-in antenna which is provided at a mobile phone SIM card. The built-in antenna connects with an RFID reader-writer chip which is integrated on an SIM card body. An inner surface of a mobile phone shell is provided with an external antenna which is electrically connected with the built-in antenna. According to the invention, through setting the external antenna at the mobile phone shell, influence of a mobile phone cell on a signal is avoided, and quality of a transmitting signal and a receiving signal are enhanced; a dimension and a shape of a present mobile phone shell are fully utilized by the external antenna, and through ingenious structural design, enough magnetic field is generated to establish data communication with an electronic tag; through combination of the external antenna and the built-in antenna, high emission frequency is generated by the antennas, a high frequency signal has strong penetrability, and a read-write distance and communication quality between the reader-writer chip and the electronic tag are reinforced.

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 relates to the field of radio frequency identification (RFID) and provides a miniature anti-dismantling electronic tag. The tag includes an antenna, a chip and a substrate. The substrate is arranged into a circular shape and accommodates the antenna and the chip. The antenna is matched with the chip. The antenna comprises a short circuit ring and a spiral monopole, wherein the short circuit ring is disposed at the periphery of the substrate. The spiral monopole is arranged inside the short circuit ring and is provided with a spiral and a top loading. One end of the spiral is connected with the short circuit ring and the other end of the spiral is connected with the top loading, and the top loading is circular. The chip is disposed on the short circuit ring. The miniature anti-dismantling electronic tag of the invention is pasted on an object or packaged in a mold required by a customer during use, the chip is disposed on the short circuit ring, the spiral and the top loading are disposed inside the short circuit ring, the area of the electronic tag can be greatly reduced, the bandwidth can be increased, and chip impedance matching can be conveniently carried out. The electronic tag is small in area and can be conveniently used in various small-size occasions with high anti-dismantling requirements.

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 present invention discloses a fragile label for a vehicle lamp, comprising a primary substrate (1), a signal line, a chip (2), a secondary substrate (9) formed of a fragile film, an anti-ultraviolet film (10) and backing paper. The chip (2) and an intermediate rectangular loop (3) are arranged on the front surface face of the secondary substrate (9), and a horizontal connection wire (4), a left bent-section antenna (5), a right bent-section antenna (6), a left rectangular block (7) and a right rectangular block (8) are arranged on a back face of the primary substrate (1). The front face of the anti-ultraviolet film (10) is adhered to the back face of the second substrate (9), and the back face of the anti-ultraviolet film (10) is adhered to the backing paper. The front face of the exceeding portion of the secondary substrate (9) is adhered to the back face of the primary substrate (1), and the life and right vertical sides of the intermediate rectangular loop (3) are both arranged on the front face of the exceeding portion of the secondary substrate (9). The label can protect the chip (2) from being irradiated and damaged, and additional protect the chip (2) from being reused by an illegal user.

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.