11 results about "Transmitter antenna" patented technology

An antenna calibration system and method use a transmitter antenna array and a receiver antenna array. Calibration automatically initiates in response to a trigger condition. Each receiver antenna in the receiver antenna array receives frequency-modulated signals from the transmitter antenna array. Optionally, the transmitter antenna array transmits signals of increasing frequency ("up chirps") and / or signals of decreasing frequency ("down chirps"). The frequency-modulated signals are processed through matched filters to determine filter responses. The phase differences for each receiver antenna are calculated based on the filter responses. Calibration coefficients for each receiver antenna are generated based on the calculated phase differences. The phase of signals received from the receiver antennae are then adjusted using the respective calibration coefficients.

This invention provides a wireless communication link selection method and a half-duplex communication system for selecting multiple physical wireless communication links between a transmitter and a receiver in a half-duplex communication system. Both the transmitter and receiver are equipped with switching switches and antennas. The method includes: the transmitter and receiver synchronously and sequentially switching their respective antennas into working states according to their pre-stored switching switch timing sequences; when any transmitter antenna and any receiver antenna are simultaneously in working states, a wireless communication link is formed, and each wireless communication link is traversed at least once; during the transmission period of any wireless communication link, the receiver transmits unidirectional heartbeat packets or time-division bidirectional heartbeat packets with the transmitter through the current wireless communication link; the transmitter and / or receiver that receives the heartbeat packet selects the optimal wireless communication link from the multiple wireless communication links based on the signal strength and packet error rate during the heartbeat packet transmission process.

A wireless short hop assembly includes a transmitter antenna and an integrated receiver / pulser module. A receiver antenna and a pulser assembly are consolidated into the receiver / pulser module. The transmitter antenna is configured to transmit, via magnetic flux induction, a magnetic carrier wave conveying a wireless signal to the receiver antenna. When the wireless short hop assembly is deployed on subterranean drilling bottom hole assembly (BHA) such that a shock reduction tool is interposed on the BHA between the transmitter antenna and the integrated receiver / pulser module, the integrated receiver / pulser module positions the receiver antenna closer to the shock reduction tool and the transmitter antenna than if the receiver antenna and the pulser assembly were discrete. The wireless signal as received by the receiver antenna is stronger and more stable than if the receiver antenna and the pulser assembly were discrete.

The present disclosure generally relates to a system and method for testing a device-under-test. The system comprises: a transmitter antenna and a receiver antenna, wherein the DUT is configured to be coupled to or is at least partially formed by the receiver antenna; a reverberation chamber including configuration means for changing an electromagnetic, 'EM', reflection behavior inside the reverberation chamber between a plurality of states; and a measurement unit. The system is configured to perform a plurality of measurements, wherein, for each measurement: the reverberation chamber is configured in a respective state among the plurality of states; the transmitter antenna is configured to emit EM waves inside the reverberation chamber based on a multitone signal; and the receiver antenna is configured to receive said EM waves and provide a receiver signal based on the received EM waves. The measurement unit is configured to determine a test result associated with the DUT based on the receiver signal associated with each of the plurality of measurements.

Systems and methods for wireless charging of a battery pack. One system includes a plurality of battery packs and a wireless charger. Each of the plurality of battery packs includes a receiving antenna configured to convert an alternating current power to a charging current. The wireless charger includes an alternating current to direct current converter, a transmitter antenna configured to convert direct current power received from the alternating current to direct current converter to the alternating current power and transmit the alternating current power to each of the plurality of battery packs. The wireless charger also includes a communication circuit configured to transmit communication signals to an external device.

A power-transmitter controller (70) of a power transmitter device (20) compares a magnitude of a current flowing through a power transmitter antenna (22) or its correlation value with a threshold, energizes a power transmitter antenna when determining that there is a power supply request based on a power supply request signal received by a power-transmitter communication antenna (40), determines whether the relative positional relationship between the power transmitter antenna and the power receiver antenna (102) is appropriate, and stops the power supply to the power transmitter antenna when determining that the relative positional relationship is not appropriate. On the other hand, the power-transmitter control unit changes, based on a traveling speed signal received by the power-transmitter communication antenna, the threshold to narrow a range of the relative positional relationship that is determined to be appropriate when the traveling speed is lower than a predetermined speed, compared with a case where the traveling speed is not lower than the predetermined speed.

The power-receiver control unit (230) supplies a stop request signal, which indicates a request to stop power supply to a power transmitter antenna, to a power-receiver communication antenna (170), when a specified stop condition, which is for requesting the power transmitter antenna (22) to stop supplying power, is satisfied. When determining that there is a power supply stop request based on the stop request signal received by the power-transmitter communication antenna (40), the power-transmitter control unit (70) stops the power supply prior to determination that there is a power supply request. The power-receiver control unit determines that a function of the power-receiver communication antenna to transmit the stop request signal or a function of the power-transmitter communication antenna to receive the stop request signal is abnormal, based on power supply that is performed even though the stop request signal is supplied to the power-receiver communication antenna.

The invention introduces a high-precision simultaneous transmitter antenna calibration method using orthogonal carrier waveforms, known as Fast Antenna Calibration by Orthogonal Carrier Sounding (FACOCS). This technique enables real-time calibration of transmitter antenna arrays, addressing phase and amplitude imbalances with exceptional accuracy. By leveraging the orthogonal properties of these carriers, the method eliminates the need for external calibration apparatus, of storage of phase or amplitude measurements for subsequent comparison, and minimizes system downtime, even for a large frequency bandwidth. It ensures optimal alignment of transmitter antennas, enhancing signal integrity and maximizing network throughput. This approach provides a robust, scalable solution for maintaining stringent calibration standards in dynamic environments, significantly improving transmitter performance and overall system efficiency.

The application provides a bridge structure remote deformation and vibration measurement method and system based on microwave sensing, comprising the following steps: S1, estimating the position of the measured target by using imaging information; S2, phase-modulating the transmission signal of the transmission antenna according to the position of the measured target; S3, mixing the signal reflected by the target with a local oscillation signal and performing low-pass filtering to obtain a multi-channel baseband signal, and obtaining the deformation displacement information of the measured target through demodulation processing; and S4, extracting the deformation displacement information of the measured target through cyclic measurement. The application provides a high-integration, convenient-to-operate, and large-field-of-view monitoring method and system suitable for bad environments such as rainy and foggy days for bridge monitoring. The application arranges multiple transmitter antennas to synchronously transmit radio frequency signals, which are used for beam synthesis and scanning, so as to improve the energy and signal-to-noise ratio of the target reflected signal and realize long-distance measurement of the bridge based on the microwave band.

A power-transmitter control unit (70) of a power transmitter device (20) energizes a power transmitter coil when determining that there is power supply request based on a power supply request signal received by a power-transmitter communication antenna (40) and stops energization of the specific transmitter antenna when determining based on vehicle identification information received by a power-transmitter communication antenna that a period, during which power is continuously supplied from a specific power transmitter antenna (22) to a vehicle identified by the vehicle identification information, exceeds a determination period.

A kitchen appliance is disclosed includes a first electrical component, a second electrical component, and a wireless power receiver system. The wireless power receiver system includes a first receiver antenna configured to couple with a first transmission antenna and receive virtual AC power signals from the first transmission antenna. A second receiver antenna is configured to couple with a second transmission antenna and receive virtual DC power signals from the second transmitter antenna. A first receiver power conditioning system is configured to receive the virtual AC power signals, convert the virtual AC power signals to AC received power signals, and provide the AC received power signals to power the first electrical component. The second receiver power conditioning system configured to receive the virtual DC power signals, convert the virtual DC power signals to DC received power signals, and provide the DC received power signals to power the second electrical component.