330 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.

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.

Antennas having single or parallel printed circuit board-based feed stalks and base station antennas having such radiating elements. The single feed stalk can have two feed lines configured to feed radio frequency signals to respective dipole radiators. Each feed line can have twin ground lines on one side (primary surface) of the single feed stalk printed circuit board and a cooperating feed trace on an opposing side (opposing primary surface) that provide RF transmissions from a feed network to a dipole radiator. The twin ground lines for the first feed line can be on a different primary surface than the twin ground lines for the second feed line and one ground line of each twin line set can cross-over each other at a forward end portion of the feed stalk. The parallel feed stalk printed circuit board can provide two feed lines for a respective dual polarized radiating element.

The invention provides a radio frequency power amplification circuit and an adjusting method thereof. The radio frequency power amplification circuit comprises an image transmission module, a first radio frequency switch, a radio frequency power amplification module, a radio frequency low-noise amplifier, a second radio frequency switch and an antenna module, the radio frequency power amplification module comprises a GaN radio frequency power amplifier, the image transmission module is connected with an RFC of the first radio frequency switch, the GaN radio frequency power amplifier is connected between RF1 channels of the first radio frequency switch and the second radio frequency switch, and the radio frequency low noise amplifier is connected between RF2 channels of the first radio frequency switch and the second radio frequency switch. The antenna module is connected with the RFC of the second radio frequency switch; the two radio frequency switches are configured to control a radio frequency signal transmitted by the image transmission module to flow to the GaN radio frequency power amplifier in a radio frequency transmitting state, and the radio frequency signal is transmitted to the antenna module after being amplified; in the radio frequency receiving state, radio frequency signals received by the antenna module are controlled to flow to the radio frequency low-noise amplifier and are sent to the image transmission module after being amplified. According to the invention, ultra-long distance image transmission of the unmanned equipment can be realized.

This disclosure provides a communication system comprising a first branch and a second branch. The first branch includes a transmit chain and a reference chain. The transmit chain includes a DPD, a DAC, a frequency mixer, a power amplifier (PA), a circulator, a filter, and a first antenna array that are sequentially connected. The second branch includes a receive chain comprising a second antenna array, a low noise amplifier, a frequency mixer, and an ADC that are sequentially connected. In an SBFD slot, the transmit chain is configured to perform downlink radio frequency transmission on a baseband signal; the receive chain is configured to perform uplink radio frequency transmission on a radio signal; and the reference chain collects a radio frequency signal output by the PA, uses the radio frequency signal as a reference signal, and performs linear cancellation processing on a received signal output by the receive chain.

A reflector, intended to form an integral part of a device for transmitting and receiving radio-frequency signals, for a gesture detector controlling automatic opening of a motor-vehicle hatch. The reflector including a reflecting plate, capable of reflecting a radio-frequency beam; at least one fastening tab, each fastening tab being integrally formed with the reflecting plate, and each fastening tab being configured to be inserted into a respective orifice passing through a thickness of a printed circuit board, and to be soldered to the printed circuit board at the orifice. The printed circuit board includes at least one radio-frequency antenna.

The invention discloses a laser-driven phase change radio frequency switch, which comprises a metal reflecting layer and a phase change layer, and is characterized in that laser heats the phase change layer through reflected light of the metal reflecting layer to change the state of the phase change layer; the first radio frequency transmission layer and the second radio frequency transmission layer are connected when the phase change layer is changed from a high-resistance state to a low-resistance state, and the first radio frequency transmission layer and the second radio frequency transmission layer are disconnected when the phase change layer is changed from the low-resistance state to the high-resistance state. Wherein the first electrode in the first radio frequency transmission layer is the input end of the phase change radio frequency switch, and the second electrode in the second radio frequency transmission layer is the output end of the phase change radio frequency switch. According to the phase change radio frequency switch disclosed by the invention, the phase change material is directly heated through laser, stray capacitance caused by a micro heater is eliminated, and insertion loss is reduced.

The utility model discloses a high-frequency ceramic substrate which comprises a bottom plate. The RF transmission line is arranged on the bottom plate and is used for transmitting a radio frequency signal; the at least one chip inductor Lm is arranged on the bottom plate and is positioned on one side of the tail end of the RF transmission line; the chip inductor Lm is electrically connected with the RF transmission line and is used for impedance matching; the at least one matching resistor Rm is arranged on the bottom plate and is connected in series with the chip inductor Lm; one side of the tail end of the RF transmission line is grounded through the chip inductor Lm and the matched resistor Rm, and the other side of the tail end of the RF transmission line is used for being connected with the EML optical chip. After the ceramic substrate and the EML chip are packaged and integrated, resonance can be formed at 30GHz under the combined action of the chip inductor Lm and the parasitic capacitance of the EML chip, and the resonance can reduce high-frequency signal reflection, so that the 1dB bandwidth of a system is improved.

A system and method for measuring and analyzing power flow parameters in RF-based excitation systems for semi-conductor plasma generators. A measuring probe is connected to an RF transmission line for receiving and measuring voltage and current signals from the transmission line. A high-speed sampling process converts the measured RF voltage and current signals into digital signals. The digital signals are then processed so as to reveal fundamental, intermodulation, triple beat, and harmonic amplitude and phase information corresponding to the original RF signals. The measurement system may also inhibit arcing by detecting when the amplitude of the intermodulation or triple beat signal exceeds a predetermined threshold, and indicating an alarm and / or reducing the power of the plasma generator when the predetermined threshold is exceeded.

Aspects of the disclosure related to devices, wireless communication apparatuses, methods, and other aspects of passive multiple input multiple output. In some aspects, an apparatus is provided that includes a first radio frequency (RF) transmission line having a first terminated with a quarter wavelength grounded transmission line, and a first array of antennas including a plurality of antenna elements. The apparatus also includes a switch array including a corresponding switch for each antenna element of the plurality of antenna elements of the first array of antennas, to selectively connect each antenna element to the first RF transmission line, and path lengths selectable by the switches at half wavelength distances for passive transmission. The apparatus also includes or more lens elements configured to modify wireless inputs signals to the first array of antennas and to modify wireless output signals from the first array of antennas.

The application discloses a novel W-waveband waveguide sealing structure, which adopts a three-dimensional stacked structure and is divided into four layers, wherein the two outer layers are clamps and the two middle layers are sealing modules; a dielectric substrate is welded in a cavity in the middle of the sealing modules by adopting a three-layer welding structure. The novel W-waveband waveguide sealing structure can be directly used for the connection of a real measurement or radio frequency transmission system without other conversion and transition structures; meanwhile, the operability of the process is fully considered, and the assembly error is less than 5 microns. The novel W-waveband waveguide sealing structure can realize the performance of air-tight packaging, wide bandwidth and low insertion loss.

The utility model provides a C-band dual-channel emission multifunctional module based on HTCC packaging, which relates to the technical field of microwave radio frequency circuits, and comprises an HTCC multilayer board, and the HTCC multilayer board comprises a top layer circuit, a second layer circuit, a third layer circuit, a fourth layer circuit, a fifth layer circuit, a bottom layer circuit and an insulating medium layer arranged between the adjacent circuits which are sequentially arranged from top to bottom; the bottom-layer circuit is used for grounding, the second-layer circuit and the fourth-layer circuit are both vertically interconnected with the bottom-layer circuit, the third-layer circuit and the fifth-layer circuit are both vertically interconnected with the top-layer circuit, the third-layer circuit is provided with a radio frequency transmission line and a low-frequency signal line, and the fifth-layer circuit is provided with a low-frequency signal line; the top layer circuit comprises a power divider, two multifunctional chips, two power amplifier chips, a monitoring unit and a control unit. According to the utility model, the assembly and debugging difficulty can be reduced, the use reliability is improved, and the practicability is stronger.

Aspects of the present disclosure relate to passive multiple-input multiple-output devices, wireless communication devices, methods, and other aspects. In some aspects, an apparatus is provided that includes a first radio frequency (RF) transmission line having a first end terminated at a quarter wavelength ground transmission line; and a first antenna array including a plurality of antenna elements. The apparatus further includes a switch array including a corresponding switch for each antenna element of the plurality of antenna elements of the first antenna array to selectively connect each antenna element to the first RF transmission line, and a path length selectable by the switch at a half wavelength distance for passive transmission. The apparatus also includes one or more lens elements configured to modify a wireless input signal to the first antenna array and to modify a wireless output signal from the first antenna array.

The present application discloses a test fixture and a radio frequency test system. The test fixture includes a carrier. The carrier is provided with at least one first test terminal and at least one second test terminal. The first test terminal is used to dock with the third test terminal of the device under test in a one-to-one correspondence, and the second test terminal is used to dock with the fourth test terminal of the test equipment. At least part of the first test terminal is connected to at least part of the second test terminal to establish a radio frequency transmission channel between the device under test and the test equipment. The test fixture is connected to the device under test and the test equipment respectively by docking, which is easy to disassemble and assemble, and the replacement cycle is shorter, thereby improving the efficiency of radio frequency testing.

A method performed by a network device for enabling and disabling a group of Ambient Internet of Things (AIoT) devices in a communication network includes provisioning the group of AIoT devices with a group identifier (ID), a group key, and a first stop code, transmitting, to the group of AIoT devices, a second stop code and a third stop code that are associated with the group ID and secured using the group key, and determining whether to disable the RF transmission capability of the group of AIoT devices based on the second stop code and the third stop code.

The application provides a ka-band ultra-wideband miniaturized frequency converter, which comprises a tube shell, two multilayer printed boards, radio frequency BGA balls, ground BGA balls and a ka-band wideband down-conversion circuit, the tube shell encapsulates the two multilayer printed boards, the radio frequency BGA balls and the ground BGA balls in a system level of the ka-band wideband down-conversion circuit, the multilayer printed boards are vertically interconnected through radio frequency transmission lines, have through holes at the same positions in the vertical direction, the radio frequency BGA balls are arranged below the through holes, the ground BGA balls are arranged around the radio frequency BGA balls at equal intervals, the radio frequency signals between the two multilayer printed boards in the vertical direction are transmitted through the radio frequency BGA balls and the ground BGA balls, the ka-band wideband down-conversion circuit is arranged on the surface of the two multilayer printed boards, and the ka-band wideband down-conversion circuit is used for down-converting the input ka-band ultra-wideband radio frequency signals to L-band intermediate frequency signals. The application solves the technical problem of miniaturizing the ka-band ultra-wideband frequency converter through the vertical interconnection of the multilayer printed boards through the radio frequency transmission lines, the radio frequency BGA transmission, the multilayer stacking process of the radio frequency printed boards and the ka-band wideband down-conversion circuit.

The invention relates to a miniaturized photoelectric co-packaged semiconductor device and a packaging method thereof.The miniaturized photoelectric co-packaged semiconductor device comprises a substrate 1, a metallization processing layer 2 is arranged on the upper surface layer of the substrate 1, a PI stacked structure 3 is arranged on the metallization processing layer 2, the PI stacked structure 3 is provided with a windowing part 301, and the windowing part 301 is provided with a window opening part 301. A semiconductor laser chip 4 is arranged at the windowing part 301; the surface layer of the PI laminated structure 3 is bonded with an interconnection circuit of a circuit element left after a copper layer is corroded and a radio frequency transmission line structure, and is distributed with a metallization area for interconnection of the semiconductor laser chip 4, the interconnection circuit and the radio frequency transmission line structure; and the metalized region is interconnected with the semiconductor laser chip 4 through a gold wire 5. According to the invention, the photoelectric co-packaging device with smaller size and higher intensity can be provided, high-frequency crosstalk can be reduced, and transmission loss can be reduced.

The application relates to a high-performance radio frequency modulation light emitting module, which comprises a radio frequency light modulation part, a circuit module and a shell module; the radio frequency light modulation part comprises a laser coupling module, a modulator module, an optical fiber assembly and a radio frequency transmission module; the laser coupling module is used for outputting an optical signal and coupling the output optical signal into the modulator module; the modulator module is used for radio frequency modulation of the optical signal and coupling the modulated optical carrier radio frequency signal into the optical fiber assembly; the radio frequency transmission module is used for transmitting the radio frequency signal to the modulator module; the circuit module is used for realizing control, monitoring and power supply functions; and the shell module is used for separating the circuit module and the radio frequency light modulation part upwards and downwards and sealing and packaging the radio frequency light modulation part. The application constructs a radio frequency modulation light module with high reliability and high performance, and meets the requirements of wide long-distance radio frequency transmission. In addition, the structure meets the requirements of equipment miniaturization and high integration.

Provided is a technique for improving the accuracy of an electrical parameter determined using a sensor in a plasma processing device. The plasma processing device comprises a plasma processing chamber, a substrate supporting unit which is disposed within the plasma processing chamber and which includes an electrically conductive base and an electrostatic chuck disposed on the electrically conductive base, an RF power source which is electrically connected to the electrically conductive base via an RF transmission line, a sensor which is configured to detect at least one first electrical parameter at a node on the RF transmission line, a first storage unit which is configured to store a measurement result obtained by measuring the capacitance of the electrostatic chuck, and a control unit, wherein the control unit is configured to determine at least one second electrical parameter of a substrate on a substrate supporting surface on the basis of the at least one first electrical parameter detected by the sensor and the measurement result of the capacitance stored in the first storage unit.

The invention discloses a W-band multifunctional integrated packaging module, and aims to improve the integration level and radio frequency performance of a W-band radio frequency front end and reduce the assembly complexity and cost of a radar and a communication system. The packaging module comprises a component layer, a packaging shell, a radio frequency transmission layer and a fine pitch micro bump vertical transmission layer. A low-cost packaging technology is adopted, a plurality of radio frequency front-end chips and capacitors based on traditional gold wire bonding are packaged into an integrated module, the integrated module can be applied to various W-band microwave radio frequency front-end application schemes, and the integrated module has the advantages of being high in integration, small in size, low in cost and the like.

A hyperpolarizer (1) is thus proposed, which has a reactor (2) for treating a polarization solution (3) with parahydrogen (4), wherein the reactor (2) has an inlet (5, 23) and an outlet (6), wherein the hyperpolarizer (1) further comprises a polarization chamber (8) having a wall (7) which is fluidically connected to the reactor (2), wherein an opening (9) is formed in the wall (7) of the polarization chamber (8), through which opening a gas (10) located in the polarization chamber (8) and displaced during a filling process of the polarization chamber (8) with the polarization solution (3) can be removed, and wherein the hyperpolarizer (1) further comprises a radio-frequency transmission coil (11) which can be introduced into a magnetic resonance apparatus and which is arranged such that a region of maximum homogeneity of a magnetic field generated by the radio-frequency transmission coil (11) in the polarization chamber (8) can be generated.It is preferably provided that the opening (9) of the polarization chamber (8) opens into a gas compression chamber (15).