17 results about "Down conversion mixer" patented technology

The invention provides an orthogonal down-conversion mixer, which comprises a first signal input port, a signal processing module and a mixing module, and is characterized in that a radio frequency signal is converted into a differential radio frequency signal through the first signal input port, and phase shift, amplification and impedance matching are performed on an initial local oscillator signal through the signal processing module; a first local oscillator signal and a second local oscillator signal are used for receiving a differential radio frequency signal, two local oscillator signals with orthogonal phases are obtained, the differential radio frequency signal is amplified through a pseudo-differential structure in a frequency mixing module, and frequency mixing is performed on the first local oscillator signal, the second local oscillator signal and the amplified differential radio frequency signal to obtain two target intermediate frequency signals. According to the orthogonal down-conversion mixer provided by the invention, the differential radio frequency signal is amplified through the pseudo-differential structure, the noise coefficient and power consumption of the mixer are reduced, the mixing speed is increased through the two local oscillator signals, and the noise coefficient of the mixer is further reduced.

The invention discloses an ultra-wideband step-frequency radio-frequency front end with high-order harmonic suppression, which comprises a transmitter and a receiver, a high-frequency local oscillator enters a power divider after passing through a driving amplifier and a band-pass filter, one path of output signal is used as an intermediate-frequency signal of a down-conversion mixer and is mixed with a step-frequency signal, and the step-frequency signal is output to the receiver; taking a sideband signal through a low-pass filter, and transmitting the sideband signal to a transmitting antenna through a power amplifier; in a receiver, a signal of a receiving antenna sequentially passes through a low-noise amplifier and a band-pass filter, enters a frequency mixer and is mixed with a coupled stepping frequency signal, an upper sideband signal in an output signal is taken, passes through a driving amplifier and the band-pass filter and then is subjected to IQ frequency mixing with the other path of signal output by a power divider, and a signal output by a power divider is obtained. And respectively carrying out AD sampling on the I channel and the Q channel. According to the invention, the high-order harmonic of the transmitted signal can be effectively suppressed without switching a filter bank, and the cost is effectively reduced while the complexity of the system is reduced.

The invention discloses a radio frequency signal receiver module and a wireless microwave gateway, and belongs to the technical field of wireless monitoring. The invention relates to a radio frequency signal receiver module, which receives a radio frequency signal returned by a passive tag and a leaked carrier signal, eliminates a large direct current component generated by the leaked carrier signal, and then converts the radio frequency signal into an intermediate frequency digital signal to be output. The wireless microwave gateway provided by the invention comprises the radio frequency signal receiver module. According to the passive tag return signal receiver module, the passive down-conversion mixer is matched with the band-pass filter to eliminate a large direct-current component generated after a leakage carrier is subjected to down-conversion, and the influence on a post-stage circuit of the receiver module is reduced, so that the sensitivity of the receiving module is improved, the receiver module is prevented from being blocked, and the service life of the receiver module is prolonged. The obtained intermediate frequency signal has high fidelity, and the demodulation precision is greatly improved.

The utility model relates to a broadband anti-burning anti-crosstalk annular low noise amplifier assembly, which comprises an input end, a low noise amplifier assembly and an output end, the input end is connected with a band-pass filter, and the output end is connected with a low-pass filter; the band-pass filter is connected with the low-noise amplifier assembly, and the low-pass filter is connected with the low-noise amplifier assembly through the down-conversion mixer; the low-noise amplifier assembly is of a multi-stage cascade system structure and comprises a front-stage broadband low-noise amplifier, a rear-stage SPDT radio frequency switch, a biasing circuit with temperature and voltage compensation effects and an ESD protection circuit. The front-stage broadband low-noise amplifier is cascaded with the rear-stage SPDT radio frequency switch; the front-stage broadband low-noise amplifier and the rear-stage SPDT radio frequency switch are respectively cascaded with a biasing circuit with temperature and voltage compensation effects; the utility model has the advantages of reasonable structure, strong anti-interference performance, safety and reliability, and can avoid burnout.

The invention discloses a simplified image frequency suppression down-conversion millimeter wave link system and a spurious suppression method. The system comprises a millimeter wave amplification module, a frequency multiplication amplification module, a down-conversion mixer and a microwave intermediate frequency amplification module, and the output end of the millimeter wave amplification module and the output end of the frequency multiplication amplification module are both connected with the input end of the down-conversion mixer. The output end of the down-conversion mixer is connected with the input end of the microwave intermediate frequency amplification module. According to the invention, simplification of the image frequency suppression down-conversion millimeter wave link system is realized, the number of adopted devices is relatively small, the complexity and cost of the system are reduced, and spurious suppression can be realized with relatively low cost.

The application discloses an anti-interference reconfigurable frequency hopping pattern communication device and method, relates to the technical field of wireless communication devices, and comprises a baseband module and an intermediate frequency processing module based on a field programmable gate array (FPGA), an AD conversion module, a DA conversion module, an up-conversion frequency mixer and a down-conversion frequency mixer connected with the baseband module and the intermediate frequency processing module based on the FPGA, and the device constitutes a transmitting chain and a receiving chain; the application has the beneficial effects that flexible frequency hopping pattern loading can be realized to adapt to communication between different devices, and the robustness of signal receiving is remarkably improved.

The application provides a kind of analog signal conditioning circuit and radar signal simulator system, wherein the analog signal conditioning circuit includes signal receiving unit, for receiving target signal;Down conversion unit, for by down conversion mixer, target signal is down converted from first frequency range to second frequency range;Analog transmission unit, for the target signal through radio frequency cable is divided into two target sub signals;Up conversion unit, for by up conversion mixer, target sub signal after adjusting signal intensity is up converted to first frequency range;Signal transmitting unit, for two target sub signals are combined into one mixed signal;Wherein the input frequency of the local oscillator signal of down conversion mixer and each up conversion mixer is derived from the output frequency of the corresponding set phase-locked loop, and the reference frequency of several phase-locked loops is derived from the same reference source, so that different echo intensity and different distance of micro-motion target are simulated, and the reliability of radar detection is improved.

A mixer may include a negative resistor, a transformer, a switching stage, and an input stage. The input stage may receive a radio frequency signal and output a current corresponding to a voltage of the radio frequency signal. The switching stage may switch based on a local oscillation signal. The mixer may be a down-conversion mixer that converts high-frequency millimeter-wave signals to an intermediate frequency.

Carrier aggregation (CA) may cause interference between operation on two or more carriers within a user equipment (UE). This interference can degrade signal quality on one or more of the carriers involved in the carrier aggregation, which may be referred to as "desensing" one or more carriers. One or more isolating buffers may be coupled at a down-conversion mixer at a point where the down-conversion mixer receives a signal from a transmission line for isolating the transmission line from other transmission lines. The isolating buffer may reduce the effect of interference between multiple transmission lines carrying different carriers during carrier aggregation (CA) operation. The isolating buffers may be used in an RF transceiver supporting both 5G sub-7 GHz and 5G mmWave wireless networks and carrier aggregation across sub-7 GHz and mmWave bands.

Embodiments described herein may be related to apparatuses, processes, and techniques related to a transceiver architecture for inter-die communication on-package using mm-wave / THz interconnects. In particular, amplifier-less transceivers are used in combination with on-package low loss transmission lines to provide inter-die communication. In embodiments, signals on the interconnect may be transmitted between up conversion mixers and down conversion mixers without any additional amplification. Other embodiments may be described and / or claimed.

The invention discloses a laser frequency locking method and device with a wide working temperature range, and belongs to the field of atomic physics, quantum optics and precision measurement. The method comprises the following steps: up-converting an initial atomic spectrum signal into a high-frequency atomic spectrum signal by using a modulation method; a down-conversion mixer is used as a demodulator, reference signal input is an amplified high-frequency atomic spectrum signal, local oscillation signal input is a modulation signal, and intermediate frequency signal output is an error signal for frequency locking; the amplifier has relatively high gain and a 1dB compression point, and can still amplify the amplitude of a high-frequency atomic spectrum signal to be higher than the 1dB compression point of the frequency mixer when the initial atomic spectrum signal is changed due to the change of the environment temperature, at the moment, the down-conversion frequency mixer works in a nonlinear saturation region, and the output of an intermediate-frequency signal does not change along with the amplitude of a reference signal; and the size of the error signal does not change along with the fluctuation of the environment temperature, so that laser frequency locking in a wide working temperature range is realized. The invention has the advantages of circuit simplification, cost saving, device size reduction, power consumption reduction and the like.

The utility model discloses a radio frequency signal receiver module and a wireless microwave gateway, and belongs to the technical field of wireless monitoring. A radio frequency signal receiver module comprises a passive down-conversion mixer, a band-pass filter, a first low-pass filter and an analog-to-digital converter which are connected in sequence. The wireless microwave gateway provided by the utility model comprises the radio frequency signal receiver module. According to the passive tag return signal receiver module of the utility model, the passive down-conversion mixer is matched with the band-pass filter to eliminate a large direct-current component generated after a leakage carrier is subjected to down-conversion, so that the influence on a post-stage circuit of the receiver module can be reduced, and therefore, the sensitivity of the receiving module can be improved; the receiver module is prevented from being blocked, the obtained intermediate frequency signal has high fidelity, and the demodulation precision is greatly improved.

The present application discloses a simplified image rejection down-conversion millimeter-wave link system and a spurious suppression method. The system includes a millimeter-wave amplification module, a frequency multiplication amplification module, a down-conversion mixer, and a microwave intermediate-frequency amplification module. The output end of the millimeter-wave amplification module and the output end of the frequency multiplication amplification module are both connected to the input end of the down-conversion mixer, and the output end of the down-conversion mixer is connected to the input end of the microwave intermediate-frequency amplification module. The present application simplifies the image rejection down-conversion millimeter-wave link system, uses fewer components, reduces the complexity and cost of the system, and can achieve spurious suppression at a relatively low cost.

The application discloses a kind of ultra-wideband step frequency radio frequency front ends with high-order harmonic suppression, comprising: transmitter and receiver, high-frequency local oscillator passes through driver amplifier and band-pass filter, into power divider, one-way output signal as the intermediate frequency signal of down-conversion mixer, with step frequency signal is mixed, through low-pass filter to take lower sideband signal, then through power amplifier to transmitting antenna;In receiver, the signal of receiving antenna sequentially passes through low-noise amplifier and band-pass filter, into mixer, with coupled step frequency signal is mixed, take the upper sideband signal in output signal, after driver amplifier and band-pass filter, with the other way signal of power divider output IQ mixing is carried out, and AD sampling is carried out to I channel and Q channel respectively.According to the application, without switch filter group, the effective suppression of the high-order harmonic of transmitting signal can be realized, while reducing the complexity of system, the cost is effectively reduced.

The invention provides an analog signal conditioning circuit and a radar signal simulator system, and the analog signal conditioning circuit comprises a signal receiving unit which is used for receiving a target signal; a down-conversion unit for down-converting the target signal from the first frequency range to a second frequency range through a down-conversion mixer; the analog transmission unit is used for dividing a target signal passing through the radio frequency cable into two target sub-signals; the up-conversion unit is used for carrying out up-conversion on the target sub-signal of which the signal strength is adjusted to a first frequency range through an up-conversion mixer; the signal transmitting unit is used for combining the two target sub-signals into one path of frequency mixing signal; wherein the input frequencies of local oscillation signals of the down-conversion mixer and each up-conversion mixer are all from the output frequencies of the correspondingly arranged phase-locked loops, and the reference frequencies of the plurality of phase-locked loops are all from the same reference source, so that micro-motion targets with different echo intensities and different distances are simulated; and the reliability of radar detection is improved.

The invention discloses communication equipment and method for anti-interference reconfigurable frequency hopping patterns, and relates to the technical field of wireless communication equipment, comprising a baseband module based on a field programmable gate array (FPGA) and an intermediate frequency processing module, the AD conversion module, the DA conversion module, the up-conversion mixer and the down-conversion mixer are connected with the FPGA, and the equipment forms a transmitting link and a receiving link. The method has the advantages that flexible frequency hopping pattern loading can be achieved so as to adapt to communication between different devices, and signal receiving robustness is remarkably improved.