Radio frequency front-end system of millimeter wave transceiver

Abstract

The utility model discloses a millimeter wave transceiver radio frequency front-end system, and belongs to the technical field of millimeter wave communication and radio frequency. The system comprises a signal receiving module and a signal transmitting module, wherein the signal receiving module comprises an antenna, a low-noise amplifier, a phase shifter, a power combiner, a band-pass filter, an amplifier, an attenuator, a power divider, a frequency mixer, a local oscillator, a phase shifter, a low-pass filter, an analog-to-digital converter and a digital baseband part. The signal transmitting module comprises a digital baseband part, a digital pre-distortion module, a digital-to-analog converter, a low-pass filter, a frequency mixer, a local oscillator, a phase shifter, a power combiner, an amplifier, a band-pass filter, a power divider, a phase shifter, an analog pre-distortion module and a power amplifier. According to the utility model, digital and analog predistortion technologies are ingeniously applied, nonlinear predistortion is introduced, nonlinear distortion caused by a power amplifier in a radio frequency system is effectively counteracted, and the linearization degree of the system is improved, so that the performance is further optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of millimeter wave communication and radio frequency, and in particular relates to a radio frequency front-end system of a millimeter wave transceiver. Background Art

[0002] In today's communications field, the RF front-end module plays a vital role, which is responsible for receiving or sending wireless signals from the antenna to the digital processing unit. With the rapid development of 5G and the Internet of Things, the demand for higher speed, lower power consumption and wider coverage is growing, and the design of the RF front-end is becoming more and more complex.

[0003] Traditional RF front-end structures have some problems, including high power consumption, large size, complex manufacturing process and high cost. In order to solve these problems, researchers have been trying to propose new RF front-end structures. However, some existing solutions often have a trade-off between power consumption and performance, and cannot fully meet the needs of the next-generation communication system.

[0004] In the front-stage circuit of the RF transmitter, the RF signal power generated by the modulated oscillation circuit is low, and it needs to pass through a series of amplifiers to obtain sufficient RF power to supply antenna radiation. However, the use of RF power amplifiers faces the contradiction between efficiency and linearity. The power amplifier has nonlinear characteristics. When the input signal amplitude increases to a certain extent, the output signal waveform will be distorted, resulting in a decrease in signal quality, which in turn causes mutual interference between signals and out-of-band spectrum leakage problems, affecting the performance of the entire communication system. Summary of the invention

[0005] The utility model aims to provide a millimeter wave transceiver radio frequency front-end system to solve the technical problems of high energy consumption, unreasonable power distribution, low efficiency and poor linearity at high power output existing in the existing radio frequency front-end architecture.

[0006] In order to solve the above technical problems, the specific technical solution of the millimeter wave transceiver RF front-end system of the utility model is as follows:

[0007] A millimeter wave transceiver radio frequency front-end system includes a signal receiving module and a signal transmitting module. The signal receiving module includes an antenna, a low noise amplifier, a phase shifter, a power combiner, a bandpass filter, an amplifier, an attenuator, a power divider, a mixer, a local oscillator, a phase shifter, a low pass filter, an analog-to-digital converter, and a digital baseband part. The signal transmitting module includes a digital baseband part, a digital pre-distortion module, a digital-to-analog converter, a low pass filter, a mixer, a local oscillator, a phase shifter, a power combiner, an amplifier, a bandpass filter, a power divider, a phase shifter, an analog pre-distortion module, and a power amplifier.

[0008] Furthermore, in the signal receiving direction, after receiving the signal, the multiple antennas send the signal to each low-noise amplifier, the low-noise amplifier sends the amplified signal to the phase shifter, the phase shifter sends the phase-shifted signal to the power combiner, the power combiner sends the combined signal to the bandpass filter, the bandpass filter sends the filtered signal to the amplifier, the amplifier sends the amplified signal to the attenuator, the attenuator sends the signal to the power divider, the power divider sends the multiple signals to each mixer, the local oscillator generates a frequency signal, the frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter, the mixer mixes the signal received from the power divider and the frequency signal after the phase shifter adjusts the phase, the mixer sends the mixed signal to the low-pass filter, the low-pass filter sends the filtered signal to the analog-to-digital converter, the analog-to-digital converter sends the converted digital signal to the digital baseband part for subsequent processing.

[0009] Furthermore, in the direction of signal transmission, the digital baseband part sends the signal to be transmitted to the digital predistortion module, the digital predistortion module sends the predistorted signal to each digital-to-analog converter, the digital-to-analog converter sends the converted signal to the low-pass filter, the low-pass filter sends the filtered signal to the mixer, the local oscillator generates a frequency signal, the frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter, the mixer mixes the signal filtered by the low-pass filter and the frequency signal after the phase is adjusted by the phase shifter, the mixer sends the mixed signal to the power combiner, the power combiner sends the combined signal to the amplifier, the amplifier sends the amplified signal to the bandpass filter, the bandpass filter sends the filtered signal to the power divider, the power divider sends the multi-channel signal to each phase shifter, the phase shifter sends the signal after the phase is adjusted to the analog predistortion module, the analog predistortion module sends the preprocessed signal to the power amplifier, the power amplifier sends the amplified signal to the antenna, and the antenna sends the signal to the target receiving end.

[0010] Compared with the prior art, the utility model has the following beneficial technical effects:

[0011] 1) Through reasonable signal processing and distribution, parallel processing and transmission of multi-channel signals are realized, improving the efficiency and performance of the system.

[0012] 2) The ingenious application of digital and analog pre-distortion technology in the utility model introduces appropriate nonlinear distortion, which can effectively offset the nonlinear distortion in the RF system, thereby improving the linearity and performance of the system, enabling the system to maintain high linearity at high power output, and providing strong technical support for high-quality transmission in the communication field. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 The figure is a schematic structural diagram of a millimeter wave transceiver radio frequency front-end device of the present utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The millimeter wave transceiver RF front-end system structure proposed in the utility model is as follows Figure 1 As shown, it includes a signal receiving module and a signal transmitting module.

[0017] The signal receiving module includes an antenna (ANT), a low noise amplifier (LNA), a phase shifter (PhaseShifter), a power combiner (Power Combiner), a bandpass filter (BPF), an amplifier (AMP), an attenuator (ATT), a power divider (Power Divider), a mixer (Mixer), a local oscillator (LO Generator), a phase shifter (Phaser), a low pass filter (LPF), an analog-to-digital converter (ADC), and a digital baseband part (Digital Baseband).

[0018] Specifically, in the signal receiving direction, after receiving the signal, the multi-channel antenna sends the signal to each low-noise amplifier, and the low-noise amplifier preliminarily amplifies the signal to enhance the signal, improve the signal quality, reduce noise and increase the receiving sensitivity. The low-noise amplifier sends the amplified signal to the phase shifter, which adjusts the phase of the received signal to achieve phase synchronization when synthesizing and processing multi-channel signals. The phase shifter sends the phase-shifted signal to the power combiner, which combines the multi-channel signals into one signal. The power combiner sends the combined signal to the bandpass filter, which filters the signal, filters out unnecessary frequencies, and allows signals in a specific frequency band to pass to maintain the bandwidth and purity of the signal. The bandpass filter sends the filtered signal to the amplifier, which further amplifies the signal to enhance the signal strength. The amplifier sends the amplified signal to the attenuator, which fine-tunes the signal to ensure that the signal level is suitable for subsequent processing. Subsequently, the attenuator sends the signal to the power divider, which divides the signal into multiple channels for parallel processing and transmission. The power divider sends multiple signals to each mixer. The local oscillator generates a frequency signal. The frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter. The mixer mixes the signal received from the power divider and the frequency signal after the phase shifter adjusts the phase, and converts the signal to the required frequency. The mixer sends the mixed signal to the low-pass filter, which removes unnecessary high-frequency components, stray signals and noise to ensure signal quality. The low-pass filter sends the filtered signal to the analog-to-digital converter, which converts the analog signal into a digital signal for easy signal processing. The analog-to-digital converter sends the converted digital signal to the digital baseband part for subsequent processing.

[0019] The signal transmission module includes a digital baseband part (Digital Baseband), a digital pre-distortion module (DPD), a digital-to-analog converter (ADC), a low-pass filter (LPF), a mixer (Mixer), a local oscillator (LO Generator), a phase shifter (Phaser), a power combiner (Power Combiner), an amplifier (AMP), a bandpass filter (BPF), a power divider (Power Divider), a phase shifter (Phase Shifter), an analog pre-distortion module (APD), and a power amplifier (PA).

[0020] Specifically, in the direction of signal transmission, the digital baseband part sends the signal to be transmitted to the digital pre-distortion module, and the digital pre-distortion module performs pre-distortion processing on the transmitted signal, confirms the working state of the analog pre-distortion module to track the changes of the power amplifier, and adjusts the nonlinear consistency of the multi-channel amplifier to compensate for the nonlinear distortion that may be generated in the subsequent analog circuit. The digital pre-distortion module sends the pre-distorted signal to each digital-to-analog converter, and the digital-to-analog converter converts the digital signal into a module signal for signal processing. The digital-to-analog converter sends the converted signal to the low-pass filter, and the low-pass filter removes unnecessary high-frequency components, stray signals and noise to ensure signal quality. The low-pass filter sends the filtered signal to the mixer, and the local oscillator generates a frequency signal. The frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter. The mixer mixes the signal after the low-pass filter is filtered and the frequency signal after the phase shifter adjusts the phase, and converts the signal to the required frequency. The mixer sends the mixed signal to the power combiner, and the power combiner combines the multiple signals into one signal. The power combiner sends the combined signal to the amplifier, which further amplifies the signal to enhance the signal strength. The amplifier sends the amplified signal to the bandpass filter, which filters the multi-channel signals, removes unnecessary frequencies, and allows signals in a specific frequency band to pass through to maintain the bandwidth and purity of the signal. The bandpass filter sends the filtered signal to the power divider, which divides the signal into multiple channels for parallel processing and transmission; the typical number of branches is 4 or 8. The power divider sends the multi-channel signals to each phase shifter, which adjusts the phase of the transmitted signal to ensure the synchronization and consistency of the signal. The phase shifter sends the signal after the phase adjustment to the analog pre-distortion module, which introduces nonlinear distortion to pre-process the signal, effectively compensates for the nonlinear distortion in the RF system, enhances the linearity of the signal and reduces distortion. The analog pre-distortion module sends the pre-processed signal to the power amplifier, which further amplifies the signal to meet the transmission power requirements. The power amplifier sends the amplified signal to the antenna, and the antenna sends the signal to the target receiving end.

[0021] The analog pre-distortion module integrates advanced signal processing algorithms, including adaptive filtering and dynamic range control, which optimize signal reception and amplification to ensure stable and reliable performance in various working environments, such as high temperature, low temperature or high humidity conditions.

[0022] The analog pre-distortion module and the power amplifier circuit are integrated into a packaged chip, thereby reducing the overall volume of the RF front end and improving the integration. The power amplifier chip combined with analog pre-distortion technology can greatly improve the linearity of the power amplifier at high power. In addition, the RF front-end system also includes advanced packaging technologies such as system-level packaging (SiP) and three-dimensional integration, which allow more functions to be integrated into a smaller space, while also providing better thermal management and higher signal integrity.

[0023] RF front-end systems use high-performance semiconductor materials such as gallium arsenide (GaAs) and gallium nitride (GaN), which are widely used in RF applications due to their high electron mobility and high-frequency performance. Combined with advanced signal processing technologies such as multiple-input multiple-output (MIMO) and beamforming, they can provide high sensitivity and fast response characteristics, thereby supporting wider frequency bands and higher data rates.

[0024] The analog pre-distortion module works with low noise amplifiers, power dividers, bandpass filters, amplifiers and other components to improve the overall signal processing capabilities. This collaborative work not only improves the quality of the signal, but also optimizes power consumption, making the entire system more efficient. By precisely controlling the connection method of each component, the RF front-end system can maintain stable and reliable performance in a variety of working environments. For example, using microstrip lines or coplanar waveguide technology can minimize signal loss and ensure signal consistency throughout the system.

[0025] In addition, the RF front-end system also has excellent anti-interference ability and long life characteristics. It can be used in communication systems that require high precision and high reliability, such as satellite communications.

[0026] The utility model realizes the parallel processing and transmission of multi-channel signals through reasonable signal processing and distribution, and improves the efficiency and performance of the system. At the same time, the ingenious application of digital and analog pre-distortion technology enables the system to maintain high linearity at high power output, providing strong technical support for high-quality transmission in the communication field.

[0027] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A millimeter wave transceiver radio frequency front-end system, a signal receiving module and a signal transmitting module, characterized in that: The signal receiving module includes an antenna, a low noise amplifier, a phase shifter, a power combiner, a bandpass filter, an amplifier, an attenuator, a power divider, a mixer, a local oscillator, a phase shifter, a low pass filter, an analog-to-digital converter, and a digital baseband section; The signal transmission module includes a digital baseband part, a digital pre-distortion module, a digital-to-analog converter, a low-pass filter, a mixer, a local oscillator, a phase shifter, a power combiner, an amplifier, a band-pass filter, a power divider, a phase shifter, an analog pre-distortion module, and a power amplifier; In the signal transmission direction, the digital baseband part sends the signal to be transmitted to the digital pre-distortion module, the digital pre-distortion module sends the pre-distorted signal to each digital-to-analog converter, the digital-to-analog converter sends the converted signal to the low-pass filter, the low-pass filter sends the filtered signal to the mixer, the local oscillator generates a frequency signal, the frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter, the mixer mixes the signal filtered by the low-pass filter and the frequency signal after the phase is adjusted by the phase shifter, the mixer sends the mixed signal to the power combiner, the power combiner sends the combined signal to the amplifier, the amplifier sends the amplified signal to the bandpass filter, the bandpass filter sends the filtered signal to the power divider, the power divider sends the multi-channel signal to each phase shifter, the phase shifter sends the signal after the phase is adjusted to the analog pre-distortion module, the analog pre-distortion module sends the pre-processed signal to the power amplifier, the power amplifier sends the amplified signal to the antenna, and the antenna sends the signal to the target receiving end.

2. The millimeter wave transceiver RF front-end system according to claim 1, characterized in that: Furthermore, in the signal receiving direction, after receiving the signal, the multiple antennas send the signal to each low-noise amplifier, the low-noise amplifier sends the amplified signal to the phase shifter, the phase shifter sends the phase-shifted signal to the power combiner, the power combiner sends the combined signal to the bandpass filter, the bandpass filter sends the filtered signal to the amplifier, the amplifier sends the amplified signal to the attenuator, the attenuator sends the signal to the power divider, the power divider sends the multiple signals to each mixer, the local oscillator generates a frequency signal, the frequency signal is sent to the mixer after the phase of the frequency signal is adjusted by the phase shifter, the mixer mixes the signal received from the power divider and the frequency signal after the phase shifter adjusts the phase, the mixer sends the mixed signal to the low-pass filter, the low-pass filter sends the filtered signal to the analog-to-digital converter, the analog-to-digital converter sends the converted digital signal to the digital baseband part for subsequent processing.

3. The millimeter wave transceiver RF front-end system according to claim 2, characterized in that: The analog predistortion module integrates adaptive filtering and dynamic range control algorithms.

4. The millimeter wave transceiver RF front-end system according to claim 3, characterized in that: The analog pre-distortion module and the power amplifier circuit are integrated into one package chip.

5. The millimeter wave transceiver RF front-end system according to claim 4, characterized in that: The system uses high-performance semiconductor materials.

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