250results about How to "Expand communication range" patented technology

The semiconductor device includes a signal processing circuit, an antenna circuit that is connected to the signal processing circuit, and a storage means that supplies electric power to the signal processing circuit. The signal processing circuit receives and transmits information through the antenna circuit, generates a direct current voltage from signals received by the antenna circuit, and stores the direct current voltage in the storage means. Furthermore, the antenna circuit has an antenna portion that receives signals by an electromagnetic induction method and an antenna portion that receives signals by a microwave method so that signals of frequencies from a wide band can be received. Because signals from a wide band can be received, the environment in which the storage means can be charged is widened.

A radio frequency (RF) device includes an RF transceiver, an RF antenna, and a magnetic signal detector. The RF is selected to be in the very high frequency (VHF), ultrahigh frequency (UHF), or super high frequency (SHF) bands such that the shielding effect is reduced and the RF device can be configured as a SIM card disposed inside a cellular phone with an increased RF communication range. The magnetic signal detector is used to sense a magnetic field signal from an RF reader, which includes an RF transceiver, an RF antenna, and a magnetic signal transmitter. The longer communication range afforded by the VHF, UHF, or SHF bands is reduced by the sensing of the magnetic field, thereby providing a communication range control, while the RF device and the RF reader exchange information through the RF channel with improved security as a result of the range control.

A receiving/backscattering arrangement for carrying out a contactless data transmission includes an integrated circuit having two antenna contacts, a series arrangement of three high quality capacitances connected between the two antenna contacts, whereby the middle capacitance is an MOS varactor, a controllable variable voltage source connected across the MOS varactor, and a control unit that controls the voltage source. The receiving/backscattering arrangement is especially a passive transponder with a rectifier connected between the antenna contacts, or a semi-passive transponder including a battery or solar cell, to provide the required supply voltage for the circuit. The arrangement achieves a large communication range, for receiving and modulating an interrogation signal, and backscattering the modulated response signal with a high efficiency and low losses. The integrated circuit structure is compact and economical.

A semiconductor device capable of wireless communication, which has high reliability in terms of resistance to external force, in particular, pressing force and can prevent electrostatic discharge in an integrated circuit without preventing reception of an electric wave. The semiconductor device includes an on-chip antenna connected to the integrated circuit and a booster antenna which transmits a signal or power included in a received electric wave to the on-chip antenna without contact. In the semiconductor device, the integrated circuit and the on-chip antenna are interposed between a pair of structure bodies formed by impregnating a fiber body with a resin. One of the structure bodies is provided between the on-chip antenna and the booster antenna. A conductive film having a surface resistance value of approximately 10⁶ to 10¹⁴ Ω/cm² is formed on at least one surface of each structure body.

An RFID reader/writer performs a radio communication with an RFID tag. An antenna for tag communication used in the RFID reader/writer is a beam scanning antenna that can perform scanning with the beam of a transmitted radio wave. The beam has a high directivity in a certain scanning direction. The scanning with the beam is performed so that a plane including the certain scanning direction intersects with a floor surface as a reflecting surface on which the strongest reflected wave is generated.

The present invention provides a multimode wireless network device, system and the method thereof. Particularly, a dual role of router and relay station is provided simultaneously in the multimode wireless network device; furthermore, dual communication modes, namely WiMAX and WiFi, are provided at the same time. The first multimode wireless network device located within the communication range of a WiMAX base station may establish a connection with the base station directly and transmit WiMAX wireless network signals. The second multimode wireless network device located outside of the communication range may establish a connection with the first multimode wireless network device so that the first multimode wireless network device becomes a relay station and may transmit wireless network signals between the second multimode wireless network device and the base station, thereby extending the communication range of the WiMAX base station.

An antenna apparatus includes a power supply coil, a booster electrode sheet, a magnetic sheet, and a ground substrate arranged in this order from the top. The power supply coil includes a spiral coil conductor located on a flexible substrate. The booster electrode sheet includes a booster electrode located on an insulating substrate. The booster electrode includes a conductor region covering the coil conductor, a conductor aperture covering a coil window, and a slit portion connecting the outer edge of the conductor region and the conductor aperture in plan view. The magnetic sheet covers the booster electrode sheet so that the magnetic sheet covers a region slightly larger than a region including the conductor aperture and the slit portion of the booster electrode.

The traditional RFID (Radio Frequency Identification)-based logistic management method cannot satisfy the requirements on arranging and positioning of containers, interior environment monitoring of the containers, cargo safety and the like. Specific to the problems of low RFID data transmission amount and limited RFID communication capacity, the invention provides a container logistic tracking and positioning method based on a tag sensor network, and the method can be used for expanding an RFID communication range and simultaneously learning interior environment information and location information of the containers in real time; by connecting RFID as well as a WSM (Watchguard System Manager) and a Wi-Fi (Wireless Fidelity) network, a novel W-KNN (Weighted k-Nearest Neighbor) positioning algorithm based on neighbor weight attributes is provided to realize logistic tracking and positioning; meanwhile, a specific technical scheme and step flows are designed and are obviously different from the traditional container positioning and tracking method. The container logistic tracking and positioning method has beneficial effects in the aspects of communication range, data transmission, accurate positioning and the like.

The invention relates to wireless communication technical field, in particular to wireless network, terminal, information sending method, terminal register, and page method, to expand the communication range of wireless network, wherein the terminal outside the cover range of wireless network sends register information to other terminals accessed into the network, to be transferred to network, the network sends the descending information covering the terminals outside the range to other terminals in the range, to be transferred to the terminal. Therefore, via the relay of other terminals, even when the terminal is outside the cover range of all base stations, the terminal can be accessed into the network to communicate, while the ascending and/or descending information of the terminal contains relay times, and the other terminals have larger relay times than a preset threshold value, therefore, the information is thrown out, and when the relay times are smaller than the threshold value, the information is transferred and the relay times are added with 1.

The invention relates to a method and system in communication devices for dedicated partner search and selection. More in particular the invention also relates to business partner search and the use of suitable portable wireless communication devices for such purposes. The devices, suitable for normal cellular services, with additional hardware for short range radio communication in a second mode and partially exchangeable software for user controlled, data entry of a personal search and/or resident profile. The profiles in all, stored in the memory of each device equipped with said hardware and software, are defined as a distributed database being wirelessly accessible by means of said software. Further the software enables the communication device automatically switching to and fro between the mode for cellular services and the local area mode for real time, data-transceiving and -processing and a messaging function, for direct personal contact.

The invention relates to an early-warning system and method for danger of an express delivery vehicle. A system monitoring terminal node collects environment parameter monitoring data in a compartment and position monitoring data of an express delivery vehicle and sends the data to a coordinator; the coordinator gathers the monitoring data and sends the data to a gateway module; the gateway module carries out processing on the monitoring data and then carries out data frame format conversion and protocol conversion, and then uploads the processed data to a cloud server; the cloud server receives the data information transmitted by the gateway module and stores the data information into a database, and the gateway module sends the data information to an alarm unit simultaneously; and the alarm unit determines whether the data information is abnormal; if so, the alarm unit sends an alarm signal out and transmits the alarm information to the gateway module and the cloud server in real time; and if not, safety information is transmitted to the gateway module in real time and is displayed on a display screen. According to the invention, early-warning for danger that may occur during transportation of the express delivery vehicle is realized; the safety transportation of the express delivery vehicle is guaranteed; and the security and survivability of the system are high.

A wireless communication system which combines transmissions which utilize vertically polarized signals and horizontally polarized signals to extend communication range and/or system capacity.

The invention relates to cellular communications systems. In order to enhance an efficiency of a cellular communications system a file in electronic form with fragments of a digital geographical map of the vicinity is preliminarily introduced into a control center of a cellular communications system, the map comprising coordinates and characteristics of base stations, arranged in cells and geographical coordinates of the borders of the cells, wherein in the process of radio communications, data on the location of a corresponding mobile station for communication therewith are determined with the aid of a receiver of a satellite location determination system, which receiver is built in a mobile station, and are transmitted through a base station to the control center of the cellular communications system, and the file of a fragment of the digital geographical map is transmitted from the control center of the cellular communications system through a corresponding base station to a mobile station, the map comprising coordinates and characteristics of the base station of that cell where this mobile station is, coordinates and characteristics of base stations of neighboring cells with coordinates of their borders, then a comparison of current data of its location and the coordinates of cell borders is carried out in the mobile station.

The invention discloses a digital cluster communication system for private network communication, comprising a terminal and a base station connected with the terminal through an air interface, whereinthe working state of the terminal comprises a transfer state. The terminal receives the signals of the base station and transmits the signals to other terminals or receives the signals of other terminals and transmits the signals to the base station when the terminal works in the transfer state. The terminal can be used as a transfer station so that the communication scopes and capacities of a handset, a car machine and a fixed station in the system are effectively extended. Therefore, the digital cluster communication system 100 for private network communication is suitable for dynamic networks in emergent communication conditions and self-establishment and self-maintenance communication networks when a certain cluster is far away from the base station, and has a large coverage radius.

A system and method for transmitting data communications through air using a radio. The invention allows the user to select from a number of predetermined output transmission powers. When a lower output transmission power is selected the current drain to the associated amplifier is decreased thereby conserving battery power of the radio. In addition, a detector diode circuit combined with an adjustable gain amplifier combine to provide a feedback mechanism whereby the output transmission power of the radio is held substantially constant over a broad range of temperatures.