17 results about "RF front end" patented technology

The invention relates to the technical field of particle accelerators, in particular to a transverse feedback system with a switchable excitation direction and a control method thereof, and the system comprises a beam position detector BPM which is used for measuring a beam signal; the RF front end is used for receiving the beam signal sent by the beam position detector BPM and carrying out amplification and filtering processing; the ADC module is used for converting the beam signal into a digital signal; the digital signal processing module is used for carrying out digital signal processing calculation to obtain an excitation signal; the DAC module is used for carrying out digital-to-analog conversion; the power divider is used for adjusting the phase of the excitation signal; the exciter comprises four Kickers with electrodes, a power amplifier, a low-pass filter and a matched load and is used for applying a transverse excitation signal to the beam current, and the problems that in the prior art, a transverse feedback system Kicker occupies a large longitudinal space, the system is complex, and precision and efficiency are low are solved.

In one aspect, a method comprises: comparing, in a comparator, a signal level of a receive radio frequency (RF) signal to a first threshold, the receive RF signal obtained from a controllable location in an RF front end circuit; and in response to the signal level of the receive RF signal exceeding the first threshold, causing the RF front end circuit to be reconfigured from a first mode in which an input to a low noise amplifier (LNA) is coupled an antenna to a second mode in which the input to the LNA is coupled to an RF filter.

A radio frequency, RF, front end (12) for a vector network analyzer, VNA, measurement system (10) is described. The RF front end (12) includes a first front end portion (20) and a second front end portion (22). The first front end portion (20) comprises a first orientation unit (28) configured to couple an RF signal traveling toward the at least one port (16) out of the at least one measurement path (18). The first front end portion (20) further comprises a second directional unit (34) configured to couple RF signals traveling away from the at least one port (16) out of the at least one measurement path (18). The second front end portion (22) includes a frequency combining unit (42) and a switching stage (40).

An example electronic device may include a first printed circuit board including a specified area. The first printed circuit board may include at least one first pad and at least one second pad formed in the specified area, wherein, when a first radio frequency (RF) front end module is disposed in the specified area of the first printed circuit board, at least one first pad is in contact with the first RF front end module and at least one second pad is not in contact with the first RF front end module, and, when a second RF front end module is disposed in the specified area of the first printed circuit area, at least one first pad and at least one second pad are in contact with the second RF front end module.

Systems, methods, devices, and machine-readable media for improved communication between a software defined radio front end device and a network based computing device are disclosed in some examples. Rather than grouping samples together, the same bit position from multiple ADC samples can be grouped together. If a quality of service (QoS) metric of a network connection between the RF front end device and the network based processing compute falls below a threshold, the RF front end device can preferentially transmit groups with higher significant bits over groups with lower significant bits. In other examples, the RF front end device can prefer samples corresponding to certain data types over other data types.

This invention discloses an on-chip spectrum sensing automatic gain control method and system for FPGA. The method includes: performing spectrum analysis on the received baseband signal, dynamically adjusting the detection threshold using a unit average constant false alarm rate algorithm, and calculating the minimum signal-to-noise ratio (SNR) required for signal detection based on the detection threshold; performing amplitude detection, logarithmic conversion, and filtering on the baseband signal based on the minimum SNR, and generating an attenuation control signal output to a digital attenuator at the RF front end to adjust the signal gain; wherein, the minimum SNR is dynamically updated based on the gain-adjusted baseband signal, and the attenuation is adjusted in real time based on the updated minimum SNR to stabilize the power of the input signal within the optimal dynamic range required for signal detection, forming a closed-loop feedback control.

The application discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, and belongs to the technical field of particle accelerators. The device comprises a beam position probe (BPM), an RF front end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker) and a matching load. The exciter Kicker has four electrode strips located on both sides of the beam center line and parallel to each other, two electrode strips on the same side are connected in parallel, the characteristic impedance of a single electrode strip is 100Ω, and the equivalent total characteristic impedance after parallel connection is 50Ω; the four electrode strips are distributed in a quadrangular symmetry in the cross section of the vacuum chamber and avoid the horizontal median plane, so as to form an open light path channel. The application improves the shunt impedance of the exciter, reduces the radio frequency power demand, realizes impedance matching with a standard 50Ω system, and guarantees the horizontal unobstructed extraction of the synchrotron radiation light.

A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.

An example method includes: receiving an uplink channel by an RF front end module; partitioning the uplink channel into a plurality of sub-channels by a neural network channel divider, wherein the plurality of sub-channels correspond to a plurality of non-overlapping distance ranges; generating, a plurality of coarse distance estimates by a neural network distance estimator, wherein the plurality of coarse distance estimates comprise a distance estimate for each of the plurality of sub-channels; generating a plurality of fine-tuned distance estimates by optimizing the plurality of coarse distance estimates; and determining, from the plurality of fine-tuned distance estimates, a downlink channel prediction, wherein the downlink channel prediction predicts a downlink channel based on the uplink channel.

This application provides an adaptive adjustment method for impedance matching network of a portable radio range extender, comprising: extracting the battery terminal voltage signal and transmit duty cycle from the radio's RF front end; analyzing the battery terminal voltage signal to identify the battery terminal voltage drop pattern and determining the tilt attitude of the drain dynamic load line under the depth of discharge; using an adaptive convergence algorithm to link the rising and falling direction of the tuning capacitor position with the reflection recovery pattern, and when the rising and falling direction is positive, increasing the tuning capacitor position; otherwise, decreasing the position to form a matching network setting; updating the rearranged links of the frequency positions in the memory tuning table according to the matching network setting to generate an adaptive adjustment link; and combining the adaptive adjustment link with the current battery terminal voltage drop pattern and the tilt attitude of the drain dynamic load line to optimize the reflection recovery pattern and determine the impedance mismatch tuning scheme.

The present application relates to the technical field of particle accelerator, and especially relates to a transverse feedback system with switchable excitation direction and a control method thereof, which comprises: a beam position probe (BPM) for measuring a beam signal; an RF front end for receiving the beam signal sent by the beam position probe (BPM) and performing amplification and filtering processing; an ADC module for converting the beam signal into a digital signal; a digital signal processing module for performing digital signal processing calculation to obtain an excitation signal; a DAC module for performing digital-to-analog conversion; a power divider for adjusting the phase of the excitation signal; and a kicker including four charged electrodes, a power amplifier, a low-pass filter and a matching load for applying a transverse excitation signal to the beam. The present application solves the problems of the prior art, such as large occupation of longitudinal space by the transverse feedback system (Kicker), complex system, low precision and low efficiency.

A radio frequency (RF) front end receives one or more symbols of a first frame transmitted by a transmitter. The RF front end determines that the one or more received symbols are related to one or more address symbols, where each of the one or more address symbols is a time domain signal of a subcarrier transmitted by the transmitter. The RF front end provides the one or more received symbols to a baseband system based on the relation. The baseband system recovers bits of a second frame within the first frame based on the one or more received symbols.

The present invention relates to a method (10) for operating a measuring device (20), in particular a signal and / or spectrum analyzer. The method (10) comprises the steps of: connecting (11) a DUT 30 [device-under-test] to an RF front end (21) of the measuring device (20); receiving and / or measuring (12) one or more signal degradation parameters of the DUT (30) and / or of user equipment attached to the DUT; and adapting (13) a configuration of the RF front end (21) based on at least one of the signal degradation parameters. FIGURE IN ABRIDGED: 1.

This invention provides a universal dual-band UAV data link antenna, including an RF connector and a reflector plate oscillator assembly. The RF connector is connected to the reflector plate oscillator assembly. The reflector plate oscillator assembly is a one-piece molded structure, comprising a reflector plate, a monopole antenna element, and an inverted-F antenna element. The RF connector is connected to the antenna interface of the RF front end via a feed line. The monopole antenna element operates in the L-band, and the inverted-F antenna element operates in the S-band. The dual-band UAV data link antenna has adjustable settings for the feed position, the monopole antenna element, and the inverted-F antenna element. The dual-band UAV data link antenna also has expansion settings. The advantages of this invention are: small size, light weight, minimal impact on aerodynamic appearance, effectively reducing installation impact; flexible, easy to use, and expandable, giving it strong versatility.

Aspects of the disclosure include a front-end module comprising one or more receive ports configured to be coupled to a transceiver, at least one low-noise amplifier configured to be coupled to the one or more receive ports, one or more antenna ports configured to be coupled to one or more respective antennas, and a multiplexer coupled to the one or more receive ports and to the one or more antenna ports, the multiplexer being configured to route a signal received at the one or more antenna ports to a selected receive port of the one or more receive ports.

The disclosure relates to a method (10) for operating a measuring device (20), in particular a signal and / or spectrum analyzer. The method (10) comprises the following steps: connecting (11) a device under test, DUT 30, to an RF front end (21) of the measuring device (20); receiving and / or measuring (12) one or more signal interference parameters of the DUT (30) and / or a user device connected to the DUT; and adjusting (13) a configuration of the RF front end (21) based on at least one of the signal interference parameters.

The application discloses a kind of NFC near-field wake-up low-power remote controller code method, it is related to NFC and wireless communication technical field, solve the energy limit problem under weak RF field;Including: detecting external RF field and energy is injected into super capacitor, record initial energy storage;When energy reaches threshold value, microcontroller, RF front end and sensor are started in turn;According to dynamic throttling coefficient adjustment bluetooth broadcast power and interval;Monitoring rectifier voltage slope, if reverse and throttling coefficient is low, then delay sensor start;After pairing confirmation, user is prompted secondary light touch supplementary energy and unlock all sensors;When sensor is all online and energy is higher than safety threshold, clear temporary key and write state to host computer.When energy detection and storage, component sequence start, broadcast parameter dynamic adjustment, voltage slope monitoring, user interaction energy supplement and key safety management, improve pairing success rate, applicable to low-energy environment.