179 results about "RF switch" patented technology

An improved architecture for a radio frequency (RF) power amplifier, impedance matching network, and selector switch. One aspect of embodiments of the invention is splitting the functionality of a final stage impedance matching network (IMN) into two parts, comprising a base set of off-chip IMN components and an on-chip IMN tuning component. The on-chip IMN tuning component may be a digitally tunable capacitor (DTC). In one embodiment, an integrated circuit having a power amplifier, an on-chip IMN tuner, and a selector switch is configured to be coupled to an off-chip set of IMN components. In another embodiment, an integrated circuit having an on-chip IMN tuner and a selector switch is configured to be coupled through an off-chip set of IMN components to a separate integrated circuit having an RF power amplifier.

Disclosed is a technology related to a low noise amplifier applied between an RF receiver and an RF switch. A phase difference matching circuit having the same phase difference as a positive gain amplifier is added to an output terminal of an attenuator of a low noise amplifier having a variable gain switching structure. In addition, a variable impedance circuit connected to an output terminal of the positive gain amplifier and an output terminal of a phase difference matching unit to finely adjust the phase difference of each output terminal may be further included.

Technologies directed to an energy efficient technique for Antennas as Sensors (A2S) systems used for detecting user input events are described. One electronic device includes a wireless communication component coupled to an antenna via a radio frequency (RF) path, and an RF switch selectively coupling the A2S system to the RF path. The radio sends RF signals to the antenna via the RF path in a first time window. The RF switch is controlled to selectively couple the A2S system to the RF path in the first time window. A processing device of the electronic device receives receiving an analog voltage signal representing impedance changes of the antenna in the first time window and determines, using the analog voltage signal, a user input event caused by a presence of an object in proximity to the antenna. The processing device performs an action in response to the user input event.

A device useful as a switch including an input waveguide coupled to an output waveguide; a first diode circuit integrated with the input waveguide at a first termination; a second diode circuit integrated with the output waveguide at a second termination; and wherein the biasing the diode circuits switches the switch between an off state and an on state and achieves high isolation in the off state by absorbing input power in, reflecting the input power from, and frequency multiplying the input power using the diodes in the diodes circuits when the input power is received from the input waveguide. In one embodiment, the switch is a tunable, solid-state SPST switch for Gband radar applications.

An on-chip integrated microwave photonic phase-coded signal generation system relates to the field of microwave photonic technology. The system includes a laser, a power splitter, a radio frequency (RF) switch, a 90° hybrid coupler (HC), a dual-parallel dual-polarization Mach-Zehnder modulator (DP-DPMZM), a polarization-dependent cascaded phase modulator (PDC-PM), a polarization beam splitter, an erbium-doped fiber amplifier, and a photodetector. In this method, the local oscillator (LO) signal is split into two parts by a power splitter. One part is input into the X-DPMZM to obtain the carrier suppression +1st order sideband of the LO signal. The other part is controlled by an RF switch. When the RF switch is off, the Y-DPMZM only outputs an optical carrier; when the RF switch is on, the Y-DPMZM outputs the -1st order sideband of the LO signal. Then, two orthogonally polarized signals are input into the PDC-PM, which is driven by two independent coding signals. When the amplitude and mode of the coding signals are changed, a binary or quaternary phase-coded signal with a carrier frequency equal to or twice that of the LO signal can be obtained through a photodetector.

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 invention provides a radio frequency (RF) switch circuit and module. The RF switch circuit includes a first resistor and stacked switching units. Each stacked switching unit comprises multiple stages of stacked field-effect transistor (FET) circuits connected in series. Each stage of the stacked FET circuit includes a FET, a second resistor, and a bootstrap unit, which includes one or two bootstrap circuits. The bootstrap unit in each stage of the stacked FET circuit is used to raise the gate voltage of the corresponding FET during electrostatic discharge (ESD) to assist in turning on the FET and allowing the ESD current to be discharged through the path formed by the FET. This invention can prevent gate oxide breakdown or thermal damage caused by localized overheating of the FET acting as a switch during an ESD event in the RF switch circuit, thereby improving the stability of the RF switch circuit.

This invention provides an unmanned aerial vehicle (UAV) image transmission system and image transmission method. The system includes: a radio frequency (RF) transceiver, a balanced amplifier circuit, a low-noise amplifier, and an RF switch. The balanced amplifier circuit includes at least two parallel power amplifiers configured to superimpose the amplified signals from each power amplifier in phase to synthesize the output power. The RF transceiver generates a time-division duplex control signal to synchronously control the switching of each component between transmit and receive modes. By employing a balanced amplifier circuit, this invention enables each power amplifier to operate in a region with better linearity, thereby improving transmit power while ensuring the signal quality required for high-order modulation, thus balancing long-distance transmission and high-definition image quality.

An apparatus of a radio unit (RU) may include a radio frequency (RF) switch selectively connected to an uplink path or a downlink path for time division duplex (TDD); at least one processor; and a memory including instructions. When executed individually or collectively by the at least one processor, the instructions may cause the apparatus to: receive a control plane message from a distributed unit (DU) within a downlink receive window; obtaining a segment for downlink scheduling based on data direction information and a segment type indicator of a generic header of the control plane message; and changing a path to which the RF switch is connected from an uplink path to a downlink path on the basis of the segmented command for increasing the symbol number and information for indicating the number of symbols.

This invention provides an automated testing device for UAV data links, including an industrial control computer, a display, a spectrum analyzer, a programmable DC power source, a programmable adjustable attenuator, a fixed attenuator I, a fixed attenuator II, a power divider I, a power divider II, an RF switch, a shielded box I, and a shielded box II. The software of the industrial control computer includes a system management module and an automated testing module. The advantages of this invention are: it uses general-purpose testing equipment, is based on a computer-automated program, and controls the settings of each testing device via a bus to simulate remote control, telemetry, image data transmission and reception, and bit error rate statistics; it achieves automated testing of core functional performance indicators of UAV data links such as power consumption, transmit power, spectrum, functionality, receiver sensitivity, bit error rate, and latency.

A wireless communication relay device includes a first transceiver and a second transceiver, each configured to operate over respective communication channels. The channels of the relay device may be configured for co-channel operation or adjacent channel operation. The relay is configured to operate according to a time division multiplexing schedule such that only one transceiver is active (receiving or transmitting) during a given time interval. During inactive intervals, antenna feeds corresponding to inactive transceivers are shunted to ground using controllable RF switches. This antenna feed shunting prevents inactive transceivers from receiving power emitted into the local RF environment, including power emitted by the active transceiver or reflected by surrounding surfaces.

The invention discloses a low-cost single-base-station high-precision positioning system and method.The system comprises a master control MCU, a UWB single chip, an RF switch and an antenna array, the antenna array is composed of a plurality of A1-AM antennas evenly distributed on a circle at intervals, and the center of the circle is provided with an antenna A0; the main control MCU is in communication connection with the UWB single chip, an RF1 port of the UWB single chip is respectively connected with A1-AM antennas in an antenna array through an RF switch, and the main control MCU controls the RF switch to sequentially select the antennas in the antenna array to access through a GPIO port; and an RF2 port of the UWB single chip is connected with the antenna A0. In the field of high-precision indoor positioning, three-dimensional high-precision positioning can be realized only by matching a single UWB chip with a radio frequency switch and an antenna array, and the overall cost and the working power consumption of a positioning system are effectively reduced.

Embodiments described herein include radio frequency (RF) switches. Generally, embodiments described herein selectively bias an output of one or more switch transistors in the RF switch. Such coupling can provide a bias that significantly reduces gate lag effects. In one embodiment, the RF switch includes an antenna node, a first input / output (I / O) node, a second I / O node, a field effect transistor (FET), a FET stack, and a bias coupling circuit. In this embodiment, the bias coupling circuit electrically couples a gate terminal of the FET to one or more FET output terminals of the FET stack to provide a bias voltage to the one or more output terminals.

The invention discloses a passive current measuring device which comprises a first loop and a second loop, wherein the first loop is composed of a microstrip antenna, an RF switch, a rectifying circuit and a micro-power-consumption oscillator and used for intermittently reflecting or absorbing environment radio-frequency signals, and the second loop is composed of a magneto-dependent resistor, the rectifying circuit and the micro-power-consumption oscillator and used for converting a magnetic induction intensity value into a magneto-dependent resistor value. An innovative magneto-resistor technology is adopted and fused with a back scattering technology, passive non-contact measurement of current is achieved, an FPC board is tightly attached to the surface of a measured conductor, errors caused by different position angles of the measurement device are greatly reduced, the weight of the measurement device is reduced through the back scattering technology and radio frequency energy collection, and the measurement precision is improved. And the problem of unstable energy supply is solved.

An improved architecture for a radio frequency (RF) power amplifier, impedance matching network, and selector switch. One aspect of embodiments of the invention is splitting the functionality of a final stage impedance matching network (IMN) into two parts, comprising a base set of off-chip IMN components and an on-chip IMN tuning component. The on-chip IMN tuning component may be a digitally tunable capacitor (DTC). In one embodiment, an integrated circuit having a power amplifier, an on-chip IMN tuner, and a selector switch is configured to be coupled to an off-chip set of IMN components. In another embodiment, an integrated circuit having an on-chip IMN tuner and a selector switch is configured to be coupled through an off-chip set of IMN components to a separate integrated circuit having an RF power amplifier.

This application proposes a microwave RF switch design method, device, and storage medium based on analytical mechanics. The method includes: acquiring switch specification information, multi-band performance constraint information, and technical platform constraint information; constructing an analytical mechanics model using scalar functions or scalar functionals; optimizing the analytical mechanics model based on the switch performance constraint information; inputting the switch specification information, multi-band performance constraint information, and technical platform constraint information into the optimized analytical mechanics model to output switch parameters that satisfy the multi-band performance constraint information; and generating design specifications for the microwave RF switch based on the switch parameters. Based on this, this application uses an analytical mechanics model to collaboratively design microwave RF switches by integrating multi-band performance constraints and technical platform constraints with switch performance. This leverages cross-band and technical platform synergy optimization to achieve cross-band switch performance trade-offs, ensuring that the microwave RF switch has optimal performance indicators.

This invention discloses a transceiver and its gain flatness adjustment method. The transceiver includes a transmit flatness adjustment circuit and a receive flatness adjustment circuit respectively added to the transmit link and receive link. Both the transmit and receive flatness adjustment circuits include multiple resonant units connected in parallel, each resonant unit including a series-connected RF switch and a resonant circuit. The maximum transmit gain fluctuation or maximum receive gain fluctuation under each switch state combination is calculated based on the transmit power or receive power. The optimal switch state combination is determined based on the maximum transmit gain fluctuation or maximum receive gain fluctuation under all switch state combinations, thereby controlling the RF switch state and achieving gain flatness adjustment of the transmit link or receive link. This invention can adapt to gain flatness differences caused by changes in different scenarios, improving the accuracy of gain flatness adjustment.

High-frequency (HF) switch (50, 60, 70, 80, 90) with adjustable resonant frequency, wherein the HF switch (50, 60, 70, 80, 90) has: having multiple connections, a first connection (T1) and a second connection (T2); an inductor (35; 45) which is electrically connected between the first terminal (T1) and the second terminal (T2); and Several field-effect transistors (FETs) are connected electrically in series between the first terminal (T1) and the second terminal (T2) and in parallel with the inductor (35), wherein a first part (31; 31a, 31b, 31c; 41) of the several FETs are controlled by a control signal to set the RF switch (50, 60, 70, 80, 90) to an ON state or an OFF state, and wherein a second part (32a, 32b; 42a, 42b) of the several FETs are controllable separately from the control signal to adjust a resonant frequency of the RF switch (50, 60, 70, 80, 90) in the OFF state.

An RF switching circuit for switching RF signals, the RF switching circuit comprises one or more RF switch drivers and one or more RF switches, the RF switch drivers configured to drive the one or more RF switches by supplying power to the one or more RF switches, the RF switch driver comprising an isolated gate driver comprising one or more inputs, one or more outputs, and electrical separation between the input circuitry and the output circuitry of the isolated gate driver, the RF switch driver configured to receive an input signal indicating when the one or more RF switches should be turned on and / or off, and to send in response an appropriate signal at the appropriate voltage to the one or more RF switches to turn them on or off according to the input signal.

1. Name of this product design: Radio Frequency Test Head. 2. Purpose of this design: To be installed on a test fixture for testing the conversion of an RF coaxial connector into an RF switch connector. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present application provides a radio frequency switch device layout structure and radio frequency switch device with embedded resistors. By embedding a gate finger group within the layout structure of the radio frequency switch device and forming a channel resistor through the gate finger group, the voltage between the gates is stabilized by using the channel resistor. While improving the attack resistance capability of the switch device, the compactness of the layout is improved, avoiding excessive layout area. In addition, the gate finger group contains at least two gate fingers, which can easily adjust the spacing between the gate fingers to achieve the effect of adjusting the Rds of the voltage between the gates, which is easy to implement in terms of process.

The invention discloses a multi-channel phase change radio frequency switch, a multi-pole single-throw switch, a single-pole multi-throw switch and a preparation method, and belongs to the technical field of microwave radio frequency devices. A plurality of output ports; the phase change-radio frequency transmission function layers are used for transmitting multiple paths of radio frequency signals, phase change layers in the phase change-radio frequency transmission function layers are connected between a first radio frequency end and a second radio frequency end, when the phase change layers are in a crystalline state, the first radio frequency end is connected with the second radio frequency end, the first radio frequency end is an input port, and the second radio frequency end is an output port; and the plurality of laser reflection structures are used for reflecting laser to the phase change layer and changing the phase change material state of the phase change layer, and one laser reflection structure is arranged between every two phase change-radio frequency transmission functional layers. The multi-channel phase change radio frequency switch is driven by laser, the heat dissipation problem is solved, and the integration level of a radio frequency system is improved in a vertical stacking mode.

In one general aspect, RF localization methods and systems are disclosed. An exemplary method includes providing a node having a communications device and antenna elements; capturing, via the communications device, a relative signal strength indicator (RSSI) value for each antenna element to generate cardinal RSSI values associated with a RF signal; and determining, using the cardinal RSSI values, a position of a RF source of interest (RFSOI) relative to the node. The antenna elements are oriented in each nodal cardinal direction and conductively coupled to the communications device. The RF signal emanates from the RFSOI. Capturing the RSSI value for each antenna element may include causing a RF switch to successively activate the antenna elements in a predetermined order; capturing the RSSI value of each antenna element when activated; and determining at least two cardinal RSSI values that are greater than a predetermined amount thereby determining antenna elements of interest.

The present disclosure relates to semiconductor structures and, more particularly, to a stacked high-power radio frequency (RF) switch and methods of manufacture. The structure includes: a top substrate having at least one top transistor and metal wiring structures; and a bottom substrate having at least one bottom transistor and metal wiring structure. The bottom substrate is attached to the top substrate with the at least one top transistor being electrically connected to the at least one bottom transistor. A portion of the metal wiring structures of the top substrate and a portion of the metal wiring structures of the bottom substrate being at least one shared capacitor between the at least one top transistor and the at least one bottom transistor. Airgaps may be formed above the transistor.

The invention provides a radio frequency switch interface multiplexing circuit which is applied to an interface circuit of an integrated circuit. The Schmitt trigger circuit comprises a plurality of first Schmitt triggers, a plurality of second Schmitt triggers and a charge pump module. The first Schmitt triggers are used for processing MIPI signals, and the input end of each first Schmitt trigger is connected with an external input voltage, so that the radio frequency switch works in an MIPI working mode by controlling the level of the external input voltage. And the second Schmitt trigger is used for processing the GPIO signal and is powered by the charge pump module. Since the first Schmitt trigger and the second Schmitt trigger are powered by different power supplies, the radio frequency switch chip for processing the MIPI signal and the radio frequency switch chip for processing the GPIO signal can be integrated only by changing the level of the external input voltage, false triggering can be avoided, and the reliability of the radio frequency switch chip is improved. And finally, the practicability is improved, and the application is wider.

A wireless communication relay device includes a first transceiver and a second transceiver, each configured to operate over respective communication channels. The channels of the really device may be configured for co-channel operation or adjacent channel operation. The relay is configured to operate according to a time division multiplexing schedule such that only one transceiver is active (receiving or transmitting) during a given time interval. During inactive intervals, antenna feeds corresponding to inactive transceivers are shunted to ground using controllable RF switches. This antenna feed shunting prevents inactive transceivers from receiving power emitted into the local RF environment, including power emitted by the active transceiver or reflected by surrounding surfaces.

This invention relates to the field of wireless communication technology, and provides a positive charge pump reset circuit and an RF switch chip. The circuit includes a low-dropout linear regulator, a positive charge pump, and a first capacitor. The input terminal of the low-dropout linear regulator is connected to a power supply, and its output terminal outputs a power supply voltage to the input terminal of the positive charge pump. The output terminal of the positive charge pump is used to boost the power supply voltage to a preset value to output a positive voltage. The first terminal of the first capacitor is connected to the output terminal of the positive charge pump, and its second terminal is grounded. The positive charge pump reset circuit also includes a reset circuit, whose input terminal is connected to either the input terminal or the output terminal of the positive charge pump. The reset circuit is used to reset the positive charge pump voltage when the received output voltage is greater than the preset value. The positive charge pump reset circuit of this invention has a fast charge reset speed and high reliability.

This invention discloses an adaptive dual-mode direction backtracking system based on double frequency conversion, comprising a radio frequency (RF) circuit, a control circuit, a local oscillator (LOO), and an antenna array. The RF circuit amplifies, filters, and mixes the RF signals received by the antenna array to form signal transmission links in mixed-mode and Van Atta array modes. The control circuit provides unified control over the RF switches and the transmit / receive delays of each channel, and outputs control signals according to the operating mode switching requirements. The LEO generates and distributes a fixed LEO signal and an adaptive LEO signal to achieve frequency matching under different incoming wave frequencies. The antenna array receives external incoming wave signals and transmits direction backtracking signals, employing an adjacent transceiver unit interconnection method in mixed-mode and a centrally symmetrical array element interconnection method in Van Atta array mode. This invention enables stable direction backtracking under different incoming wave frequencies and different application scenarios.

The mobile phone signal amplifier comprises an indoor antenna interface, an outdoor antenna interface, a duplexer, a multi-stage signal amplifier, a surface acoustic wave filter, a signal strength detector, a radio frequency switch, a power supply module, a current detector, a temperature sensor, an operational amplifier, a microcontroller, a USB interface and a test interface. In addition, a display key board, an optional accessory power supply box and an antenna front end amplification module are also included. The outdoor antenna interface 1 is connected with the duplexer 3, the indoor antenna interface 2 is connected with the duplexer 4, an uplink and a downlink are connected between the duplexer 3 and the duplexer 4, and the uplink and the downlink are sequentially connected with the signal amplifier 5, the signal amplifier 6, the radio frequency attenuator 7, the signal amplifier 8, the signal amplifier 9 and the radio frequency switch 10. And a surface acoustic wave filter is connected between the amplifiers. All the components are integrated on the front face and the back face of a PCB. The mobile phone signal amplifier has multiple power supply modes including outdoor antenna interface power supply, indoor antenna interface power supply and USB interface power supply. The mobile phone signal amplifier can support multi-stage cascading, self-excitation detection, adjustable gain and automatic control.

A magnetic resonance imaging (MRI) system includes a plurality of gradient coils positioned about a bore of a magnet. The MRI system also includes a radio frequency coil assembly. The MRI system also includes an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to the RF coil assembly to acquire MRI images of a subject within the bore. The at least one component of the MRI system is manufactured with microstructures having a braided configuration. The microstructures are configured to cancel out eddy currents that are induced in the at least one component by a magnetic field when the MRI system is utilized.