130 results about "Radio frequency" patented technology

A long-range radio frequency (RF) transceiver-controller module configured to transmit and receive RF signals in one or more of the 433, 868, 915 MHz, and 2.4 and 5.8 GHz Industrial, Scientific and Medical (ISM) frequency bands is provided that is capable of consistently transmitting such signals over a range of 100 metres or more without line of sight, including underground. A wireless control system that comprises a plurality of the long-range RF transceiver-controller modules arranged in a distributed, ad hoc networking topography is also provided. The wireless control system has utility in a wide range of medical, industrial, agricultural, military and commercial applications, including, for example, the management of irrigation systems, manufacturing processes, security systems, sewage treatment and handling systems, hospital management systems.

A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.

A wideband receiver for a wireless communication system and a method for controlling the same are provided. In the wideband receiver for a wireless communication system, a receive path includes a mixer for receiving a Radio Frequency (RF) signal having a frequency f_SG and for converting the RF signal into an Intermediate Frequency (IF) signal having a frequency f_IF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency f_LO1, and at least one Phase Locked Loop (PLL) for providing the local oscillation signal to the mixer. A control block determines whether a half-IF signal having a center frequency of f_SG-f_IF/2 exists in the IF signal, and when the half-IF signal exists, controls the at least one PLL to generate a second local oscillation signal having a second local oscillation frequency f_LO2 greater than the first local oscillation frequency f_LO1.

A radio frequency transceiver for a wireless local area network (LAN) may have two or more antennae. An active antenna that delivers a data-bearing signal having a signal quality at least as good as any of the antennae may be selected based upon measurements of the signal quality during a preamble field of data frames having a substantially longer preamble field than other data frames.

In an automatic remote metering system in accordance with the invention a method is provided for reprogramming each client utility meter from a host computer by downloading a reprogram first program from the host to a corresponding hub utility meter fourth memory portion via a communications link, verifying integrity of the reprogram first program, and downloading the reprogram first program from the hub utility meter to the client utility meter via a radio frequency link and overwriting the client utility meter first program code with the reprogram first program code.

Disclosed is a water-cooled radio frequency tumor extinguishing treatment system, which employs radio frequency heating means to place the target tissue in human body into between the melting electrode and leading electrode, a series resonant circuit is utilized in the radio frequency energy amplification, the rear portion of the melting electrode needle of the cold circulating pinshaped electrode is plated with an insulation coating layer, a bare tip is formed on the front end, thus the radio frequency energy capacity can radiate from around to the leading electrode, as a result, a melting zone is formed. The recirculated cooling water flows from the inlet pipe to the melting electrode needle, and returns to the recirculated cooling water subsystem from the exhaust pipe after heat interchange.

According to an embodiment is a system that selectively permits or denies access to a restricted environment. Access can be based at least in part on the status of wireless transmitters of a mobile device, the status is one of active or inactive wireless communication. The system can automatically inactivate or disable a transmitter through a wireless command and thereafter permit access to the restricted environment. The mobile device can communicate wirelessly through one of a wireless local-area networks (WLAN), wireless wide-area network (WWAN), wireless personal-area network (WPAN).

The invention provides an airport passenger registered luggage real-time tracking system. The airport passenger registered luggage real time tracking system is characterized by comprising a radio frequency label adhered to the passenger registered luggage, an identification and reading device, a background monitoring system, a database and a personal mobile terminal APP; the background monitoring system can realize functions of query, display, statistics and abnormal alarm on the registered luggage of the passenger; the database is used for storing information data of passengers and registered luggage thereof; the personal mobile terminal APP can realize real-time query and can display positions and state information of the registered luggage of the passengers, and can perform luggage abnormal state broadcasting through text information and a voice prompt; and the personal mobile terminal is in interconnection and intercommunication with an airport passenger registered luggage real time tracking system through an airport mobile communication network. The airport passenger registered luggage real time tracking system and the usage method use the informatization mean to manage and monitor the safety check and the transport state of the registered luggage, and can make the passenger quickly master the real-time position and state information of the registered luggage.

A heat dissipation device and a radio frequency module with the same are provided. The heat dissipation device includes a substrate (1). The substrate (1) having a surface where a heat absorbing surface (5) is formed. There are multiple hollow conduits inside the substrate (1) to act as evaporating conduits (6). The heat dissipation device further comprises condensing conduits (7) intercommunicated with the evaporating conduits (6). The evaporating conduits (6) and the condensing conduits (7) form sealed conduits. The sealed conduits are filled with liquid which vaporizes upon heating. At least the evaporating conduits (6) are set in the substrate (1).

In a radio communication system wherein radio frequencies for communicating with a radio terminal are different in radio base stations, a table in which positional information, information on the frequency used for transmission/reception to/from the terminal, and a decision condition in a handoff operation are stored as to each base station is prepared in a base station controller beforehand. When the positional information is received from the radio terminal, the base station controller selects the base station being a handoff candidate, on the basis of the positional information of the radio terminal, the positional information of each base station and the decision condition of the handoff operation with reference to the table, and it transmits a handoff request message which contains the information on the frequency of the base station being the handoff candidate, to the radio terminal through the base station communicating with the radio terminal.

Besides normal states of receiving and transmitting channel, the disclosed receiver and transmitter in radio frequency also possesses calibration states. In time of calibrating transmitting channel, the method lets two sets of receiver and transmitter of calibration work at calibration state of receiving channel to receive a calibration signal; and other receivers and transmitters work at normal state to transmit calibration signals. The method obtains each two times of test data of each transmitting channel. In time of calibrating receiving channel, the method lets two sets of receiver and transmitter of calibration work at calibration state of transmitting channel in sequence to transmit calibration signal; and other receivers and transmitters work at normal state to receive calibration signals. The method obtains each two times of tested data of each receiving channel. Based on the said two times of tested data, the method calibrates receiving and transmitting channels.

The invention relates to an automatic measuring instrument for a crystal inflection point of an oven-controlled crystal oscillator (OCXO), and the automatic measuring instrument comprises a debugging rack, an inflection point debugging socket (1), an inflection point debugging board (2), a radio frequency control board (3), a frequency measurement instrument (4) and a control computer (5). An only address code is sent to the inflection point debugging board, the resistance of a digital potentiometer of the address is set as a designated value, and the frequency of each oven-controlled crystal oscillator is read. A temperature-frequency characteristic curve of the oven-controlled crystal oscillator is fitted according to measured data, and the resistance value at the crystal inflection point is calculated. Compared with the prior art, the automatic measuring instrument has the following beneficial effects that the debugging equipment is used, each piece of equipment can debug 160 OCXOs each time, and other operations except for placing the OCXOs do not need to be performed by workers; each debugging needs about 3-4 hours, namely about 40 OCXOs are debugged in each hour; compared with the debugging speed of manual debugging for 4-5 OCXOs in each hour, the efficiency is increased by more than 10 times; and as accurate data provided by software is used for modeling, the one-time temperature-frequency characteristic passing rate can be close to 99 percent, which is greater than 80 percent of manual debugging.

A radio frequency integrated circuit with a silicon-on-insulator substrate includes a buried oxide layer that is disposed over a silicon substrate. The silicon-on-insulator substrate has a silicon layer that is disposed over the buried oxide layer. The integrated circuit includes a transistor disposed on the silicon layer, and a guard-ring in the silicon-on-insulator substrate that surrounds the transistor on the silicon layer. Depletion regions on the silicon substrate corresponding to areas surrounding the transistor is defined by the application of a voltage to the guard-ring. Isolation of radio frequency transmission lines on silicon-on-insulator substrates is also possible with this configuration.

The invention discloses an intelligent street lamp control system. The intelligent street lamp control system includes street lamp control terminals, street lamp monitoring sub-stations and a street lamp management center; the street lamp control terminals acquire the voltage, current and power information of street lamp nodes and upload the data to the street lamp monitoring sub-stations; the street lamp control terminals receive commands issued from the street lamp monitoring sub-stations and execute operation so as to realize switching control and brightness adjustment of street lamps; the street lamp control terminals analyze and process received data packets, and send and receive data through radio frequency transmission modules; and the street lamp monitoring sub-stations maintain the node information of all street lamp control terminals on roads where the street lamp monitoring sub-stations are located, and transmit corresponding data to the street lamp management center. According to the intelligent street lamp control system of the invention, a GPRS public wireless communication technology and short-distance wireless communication technology-combined scheme is adopted, and the advantages of the GPRS public wireless communication technology and the short-distance wireless communication technology can be combined, and therefore, the problem of high cost can be solved, the complexity of the system is reduced, and the intelligent street lamp control system is practical, is convenient to manage, assist in saving energy and can realize intelligent control.

The present invention provides a package device for reducing the electromagnetic/radio frequency interference, which includes a first substrate with a shielding structure on the under surface of the first substrate, and an insulating layer on the shielding structure. The first substrate includes a through hole that is filled with the conductor therein. A plurality of lead-frames located on the bottom surface of the first substrate. A second substrate located above between the two lead-frames. Then, the molding compound encapsulated to cover the above structures to form a package device. Therefore, the shielding path of the package device is constructed of the plurality of lead-frames, the conductor within the first substrate, the shielding structure, and the grounded to discharge the electromagnetic/radio frequency out of the package device, thus, the electromagnetic/radio frequency interference for the package device can be reduced.

The invention relates to a method for realizing radio-frequency bidirectional communication through mobile terminal code matching. The method comprises the following steps: I, pre-defining and writing primary device ID numbers on primary devices, and generating and attaching primary device ID two-dimensional codes corresponding to the primary device ID numbers at the same time; defining and writing sub-device ID numbers on sub-devices, and generating and attaching sub-device ID two-dimensional codes corresponding to the sub-device ID numbers, wherein a manufacturer needs to import the ID numbers of all the primary devices and all the sub-devices into a device ID dictionary database storage module of a cloud server in advance; II, registering on mobile equipment by following a service number through personal WeChat or downloading an APP, wherein at the moment, the ID of the mobile equipment is input into the device ID dictionary database storage module of the cloud server; III, scanning the primary device ID two-dimensional codes of the primary devices by using the mobile equipment to finish binding between the primary devices and the mobile equipment; IV, performing pairing operation of the primary devices and the sub-devices; and V, unbinding the mobile equipment and the primary devices, and unpairing the primary devices and the sub-devices. Through adoption of the method, simple pairing can be performed without presetting. The method is convenient to operate, and can be applied widely.

The invention discloses an encrypting and authenticating equipment with dual safety chips, belonging to the technical field of identity authentication. The equipment comprises a shell, a USB plug outside the shell, a first safety chip, a second safety chip and a radio-frequency antenna, wherein the first safety chip, the second safety chip and the radio-frequency antenna are encapsulated in the shell; the first safety chip is connected with the USB plug, is connected with the second safety chip in the shell, and is also connected with an external system host computer by the USB plug; the second safety chip is connected with the radio-frequency antenna and is connected with a radio-frequency receiving terminal by the radio-frequency antenna; and the first safety chip and the second safety chip carry out communication with each other by an I/O interface. In the invention, two safety chips are used, the two safety chips are internally embedded in an intelligent card embedding software system respectively, thus realizing one corresponding application respectively; and the mutual independence of the two safety chips is effectively ensured, the safe and convenient multi-application formsare realized, furthermore, the two safety chips can realize the safe communication by the I/O interface.

The invention discloses novel optical calibration equipment of a radio-frequency simulated target antenna array. The equipment is composed of a laser range-measurement system mounted on a rotary table, a video image acquisition system and a computer control and communication system, wherein the laser range-measurement system is used for measuring the distance between an antenna and the center of the rotary table; the video image acquisition system is used for obtaining an optical image of the antenna and converting the optical image into an electronic image; and the computer control and communication system is used for controlling the turning positioning of the rotary table, receiving the electronic image generated by the video image acquisition system and displaying the electronic image on a screen. Through adoption of the equipment provided by the invention, a mounting position and a spacing of a geometric center of each antenna surface meet design precision requirement, so that the difference in amplitude-phase characteristics among all paths of radiation signals of radiation interfaces of all antenna units is reduced and the fine adjustment of an electric characteristic becomes convenient so as to reach the consistency of electromechanical characteristics. Furthermore, through functions of voice communication and image transmission, workers can accurately obtain measured data and image information of the rotary table in time and the antenna can be conveniently and efficiently adjusted.

Said system includes a reader and at least a responder. It is characterized by that a wireless signal with specific form is used to create wireless communication between the reader and responder, said wireless signal is formed from logic signal portion and time slot portion, the logic signal portion is used for transferring various commands or informations of reader to responder, and time slot portion is used for responder to make back scattering modulation and transfer one-column binary bit response signal to reader; it uses the wireless communication as basis, the reader can transfer correspondent command and/or information to responder, and can make the responder implement correspondent conversion between initial state, general inquiry state, general search state, waiting state and confirmation state and execute search and or inquiry action of reader to responder so as to implement identification of reader to responder.

The invention discloses a method for preparing a fluorine-doped tin oxide thin film, which is low in cost and simple in process, and utilizes a radio frequency magnetron sputtering technology. The method comprises the following steps of: a, uniformly mixing tin oxide powder and fluoride, and drying; b, preparing a powder target by using the dried mixture obtained in the step a, installing on a radio frequency target of a sputtering instrument, cleaning and drying a substrate material, and then installing at a sample position of a vacuum chamber of the sputtering instrument; and c, starting a sputtering process, and thus preparing the fluorine-doped tin oxide thin film. The method is simple, the production cost is low, and the fluorine-doped tin oxide (FTO) thin film also has high transmitting and electric conduction performance, is high in comprehensive index FTC value, and has good application prospect.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband.

The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

The invention discloses Zigbee technology-based access control management method and device. The method comprises the following steps of: transmitting access control information acquired from a radio frequency card to an access control Zigbee network coordinator node by an access control Zigbee terminal node in a wireless mode; processing the access control Zigbee network coordinator node by an access control computer management device through the access control information transmitted by a wired communication module to obtain a control signal; and finally, transmitting the control signal to the access control Zigbee terminal node by the access control Zigbee network coordinator node in a wireless mode, and executing an access control operation by the access control Zigbee terminal node. The device comprises the ratio frequency card, the access control Ziggbee terminal node, the access control Zigbee network coordinator node and the access control computer management device. The invention has the characteristics of low power consumption, low cost, high safety, low complexity, simple network structure, and the like.

The embodiment of the invention discloses an LTE receiving channel delay correction method, a device and a base station with the device. The method comprises the steps of receiving uplink sounding signals of multiple users with multiple antennas; selecting a user from multiple users as a set user, and according to the uplink sounding signal of the set user acquiring the power delay spectrum of the set user in each receiving channel; according to the power delay spectrum of each receiving channel respectively acquiring the delay value of each receiving channel; and according to the delay value of each receiving channel respectively carrying out delay adjustment on each receiving channel. In this embodiment, the characteristic that the LTE system needs to employ the sounding signal of the user and a power delay spectrum estimation algorithm to compute the PDP estimation so as to obtain the power delay spectrum is employed, and then the delay adjustment value is obtained according to the power delay spectrum, thus the delay correction of the radio frequency receiving channel in the base station is realized.