453 results about "Rf transmission" patented technology

The invention discloses a wireless radio frequency data monitoring and distribution platform system and method based on data analysis, and belongs to the technical field of wireless communication. Wireless radio frequency signal parameters are acquired, data processing is performed on the signal parameters, a signal evaluation model is constructed, and the signal parameters are imported into the signal evaluation model to evaluate the signal-to-noise ratio. Constructing a channel occupation and multipath time delay extension evaluation model, importing the channel occupation time and the power and time delay of the multipath channel into the channel occupation and multipath time delay extension evaluation model to evaluate the signal condition, and constructing an equipment interference model; the method comprises the following steps: importing signal parameters and position distances of field working equipment into an equipment interference model to evaluate the interference degree of the working equipment on a wireless radio frequency transmission signal, constructing an optimal frequency band scoring model, and importing a signal-to-noise ratio, a channel occupancy rate, multipath time delay extension and equipment interference conditions into the optimal frequency band scoring model to perform frequency band selection. And the reliability and the real-time performance of wireless communication in an industrial scene are improved.

The invention discloses a radio frequency plasma comprehensive testing device and method for an ion process system, and relates to the technical field of plasma testing, and the device comprises a host and a coupling probe; the coupling probe is placed on a radio frequency transmission line of an ion process system, is used for carrying out coupling sampling on radio frequency energy through a capacitance or inductance coupling mode according to an electromagnetic field coupling principle, obtains current and voltage signals through coupling, and is also used for sensing and obtaining real-time temperature data in the probe; the host comprises a main body shell and a shielding frame arranged in the main body shell, and a data processing and analyzing unit is arranged in the shielding frame and used for performing data processing on the received voltage, current and temperature signals; the radio frequency power supply power, the radio frequency power supply frequency spectrum, the impedance of the matcher and the vacuum reaction cavity and other ion process system parameter values are calculated and generated, and meanwhile clutter capture and radio frequency transmission harmonic wave test results in radio frequency transmission are output, so that the comprehensive test of the ion process system is realized.

The invention discloses an image analysis method and system for quality control traceability of a satellite navigation board, and relates to the technical field of image processing. The method comprises the following steps: synchronously acquiring an image and three-dimensional point cloud data of a radio frequency transmission line area through a high-resolution area array CCD camera and a laser contourgraph; acquiring a transmission line contour based on image identification, and constructing a three-dimensional radio frequency line model through point cloud fitting; detecting the line width and the distance to the ground plane by using the model, and calculating the impedance prediction complexity in combination with a data acquisition error; dynamically calling a characteristic impedance prediction engine based on the complexity to obtain a predicted characteristic impedance sequence; and quality defect judgment is carried out, and traceability control is carried out on defective products. According to the method, a complete technical chain from geometric dimension detection to electrical performance evaluation is established, hidden defects which are difficult to find by a traditional method can be effectively identified, and the quality control precision and the product yield of the satellite navigation board are improved.

Methods, apparatus, systems, and computer program products for tire pressure monitoring system (TPMS) sensor authentication are disclosed. In a particular embodiment, an electronic control unit (ECU) of a vehicle receives a first radio frequency (RF) transmission that includes TPMS data and a first signature value. In this particular embodiment, the ECU uses a key value to generate a second signature value and determines whether the second signature value corresponds with the first signature value. In this example embodiment, the ECU uses a determination of whether the second signature value corresponds with the first signature value to determine whether the first RF transmission is from a particular TPMS sensor authenticated to the key value.

Techniques described herein utilize a system comprised of a cloud-based communication platform server (CPS), a plurality of fixed location wireless beacons within a geofenced area, and a fleet of user equipments (UEs). Each UE is capable of wireless communication with the CPS over one or more of a plurality of wireless RF networks. Additionally, each UE may also be configured to receive RF transmissions directly from the plurality of fixed location wireless beacons. The system may implement a method for determining areas of poor wireless connectivity within the geofenced area. The method may comprise determining whether a UE has an active connection with the CPS via at least one of the plurality of wireless RF networks. When the UE does not have an active connection with the CPS via any of the wireless RF networks, it may self-determine its location within the geofenced area and store its self-determined location. The UE may repeat the location self-determining and location storing steps on a periodic basis until the UE has re-established an active connection with the CPS. Once the UE has re-connected to the CPS, it may then upload the set of stored self-determined location data to the CPS that was acquired while the UE was disconnected from the CPS.

An embedded PCBA module comprises a ceramic substrate microwave filter and a multi-layer microwave printed board, the multi-layer microwave printed board is provided with a blind groove and board end radio frequency transmission lines, the blind groove is consistent with the ceramic substrate microwave filter in shape and size, the bottom of the blind groove is provided with a grounded copper layer, and the board end radio frequency transmission lines are printed on board surfaces on two sides of the blind groove; the ceramic substrate microwave filter is embedded in the blind groove and is flush with the upper surface of the multi-layer microwave printed board, a ground layer on the bottom surface of the ceramic substrate microwave filter is in contact with the ground of the multi-layer microwave printed board in a fitting manner, and the ceramic substrate microwave filter is provided with a first radio frequency transmission port and a second radio frequency transmission port which extend to the edge of the filter; and the first radio frequency transmission port and the second radio frequency transmission port are respectively connected with adjacent board end radio frequency transmission lines through signal connecting pieces. According to the utility model, parasitic parameters are reduced through a plurality of measures, so that the normal operation of products is ensured.

The invention relates to a lower frequency band radiating element with reduced scattering of higher frequency band radiation. A radiating element includes: a feed stem printed circuit board including a first RF transmission line and a second RF transmission line; a first dipole radiator coupled to the first RF transmission line; and a second dipole radiator coupled to the second RF transmission line. The first dipole radiator comprises a first dipole arm and a second dipole arm, and the second dipole radiator comprises a third dipole arm and a fourth dipole arm. A first amount of coupling between the first dipole arm and the third dipole arm exceeds a second amount of coupling between the first dipole arm and the fourth dipole arm.

An impedance matching network for a radio frequency (RF) transmission system can include first port for coupling to a first transistor differential pair. The network can further include a second port for coupling to a second transistor differential pair. The network can further include a matching network connected to the first port and the second port, the matching network comprised of a pair of coupled lines. Other aspects are described.

The invention belongs to the technical field of mass spectrum ionization sources, provides an online detection mass spectrum ionization source for gas components at an outlet of a combustion chamber of an aero-engine, and solves the problem that an existing ionization source is difficult to be applied to a field test for measuring the concentration of components at the outlet of a combustion chamber of a real aero-engine. According to the technical scheme, the device comprises an ionization source cavity and a radio frequency windowless discharge lamp, a plate electrode, a taper hole electrode, a lamp holder electrode, a direct current transmission electrode, a radio frequency transmission electrode and a differential electrode are sequentially arranged in the ionization source cavity in the axis direction, and a discharge gas inlet is formed in the ionization source cavity. One end of the radio frequency windowless discharge lamp is connected to the discharge gas inlet, and the other end of the radio frequency windowless discharge lamp extends into the lamp holder electrode; the taper hole electrode enables fuel gas to be fed in a molecular beam mode, efficient transmission of stable components and active components in the fuel gas is guaranteed, efficient transmission of ions is achieved in the mode that the direct-current transmission electrode and the radio-frequency transmission electrode are combined, and full-spectrum online analysis of the components of the fuel gas at the outlet of a combustion chamber of an aero-engine can be achieved.

Systems, devices, and methods are provided for changing the power state of a sensor control device in an in vivo analyte monitoring system in various manners, such as through the use of external stimuli (light, magnetics) and RF transmissions.

A tire fitted with a transponder comprises: a crown comprising a crown reinforcement having an axial end at each of its edges, connected at each of its axial ends by a sidewall to a bead having an interior end; a carcass reinforcement layer formed of parallel reinforcers, which is anchored in each bead around a bead wire to form a main part and a turn-up; the transponder comprising a core defining a first axis, a first cover filament helically twisted around the core and an electrical insulation device; and the first cover filament comprising at least two conductive filamentary elements galvanically connected to an electronic chip comprising a radiofrequency transmission-reception component. The thickness of elastomeric compound separating the outer cover filament, located radially outermost with respect to the first axis, and the reinforcements is greater than 0.5 millimeters.