Radio frequency front-end system of satellite communication ground terminal transceiver
By introducing analog predistortion circuits and advanced packaging technology into the RF front-end system, the problems of high power consumption and insufficient linearity in traditional RF front-end designs are solved, and high-performance and low-power RF front-end systems are realized, suitable for modern wireless Communication requirements.
Patent Information
- Application Number
- CN202421036299.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-05-10
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional RF front-end designs have problems in power consumption, volume, manufacturing process and cost, and it is difficult to reduce power consumption while maintaining high performance, especially when high-power output is insufficient linearity affects signal quality.
A radio frequency front-end system for satellite communication ground terminal transceiver is designed, using signal reception and transmission modules, and an analog predistortion circuit is introduced to compensate for nonlinear distortion, and signal loss is minimized through a variety of advanced packaging technologies and connection methods, and optimized Circuit layout to reduce interference and noise.
It significantly improves the linearity of the system when outputting high power, reduces power consumption, improves system performance and anti-interference capabilities, achieves higher integration and sensitivity, supports wider frequency bands and higher data rates.
Smart Images
Figure CN222215732U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of millimeter wave communication and radio frequency technology, and in particular relates to a radio frequency front-end system of a satellite communication ground terminal transceiver. Background Art
[0002] In today's communications field, the importance of RF front-end modules as a bridge between antennas and digital processing units is self-evident. With the rapid development of wireless communication technology, especially the widespread application of 5G and Internet of Things technology, the requirements for communication speed, power consumption and coverage are becoming more and more stringent, which undoubtedly brings unprecedented challenges to the design of RF front-ends.
[0003] Although traditional RF front-end design has met early communication needs to a certain extent, its problems in power consumption, volume, manufacturing process and cost are becoming increasingly prominent. High power consumption not only affects the endurance of the device, but also increases the difficulty of heat dissipation; large volume limits the portability and integration of the device; complex manufacturing process not only increases production costs, but also affects production efficiency; high costs make some application scenarios unbearable.
[0004] In order to break through these limitations, researchers are constantly exploring new RF front-end structures. However, some current solutions often find it difficult to find an ideal balance between power consumption and performance. Some designs reduce power consumption, but the performance is greatly reduced; some designs improve performance, but the power consumption remains high. Therefore, how to reduce power consumption while maintaining high performance has become an urgent problem to be solved in the field of RF front-end design.
[0005] Traditional RF front-end architectures are often limited by issues such as energy consumption, power allocation, efficiency, and linearity. Especially at high power output, insufficient linearity often leads to a decrease in signal quality, which in turn affects the performance of the entire communication system. Summary of the invention
[0006] The utility model aims to provide a radio frequency front-end system for a satellite communication ground terminal transceiver, so as to solve the technical problems of high power consumption and insufficient linearity of the radio frequency front-end architecture in the prior art.
[0007] In order to solve the above technical problems, the specific technical solution of the radio frequency front-end system of the satellite communication ground terminal transceiver of the utility model is as follows:
[0008] A radio frequency front-end system of a satellite communication ground terminal transceiver 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 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-to-analog converter, a low pass filter, a mixer, a local oscillator, a phase shifter, a power combiner, an amplifier, a bandpass filter, a phase shifter, an analog predistortion module, and a power amplifier.
[0009] Furthermore, in the signal receiving direction, after the antenna receives the signal, it sends the signal to the 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 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 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 is adjusted by the phase shifter, 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.
[0010] Furthermore, in the direction of signal transmission, the digital baseband part sends the multi-channel signals to be transmitted 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 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.
[0011] Compared with the prior art, the utility model has the following beneficial technical effects:
[0012] 1) The utility model introduces appropriate nonlinear distortion, and the analog predistortion circuit effectively compensates for the nonlinear distortion in the radio frequency system, thereby significantly improving the linearity of the system at high power output.
[0013] 2) The RF front-end system uses a variety of advanced packaging technologies and connection methods to minimize signal loss and ensure signal consistency throughout the system. In addition, by precisely controlling the connection methods of each component and optimizing the circuit layout, interference and noise can be further reduced, improving the overall performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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.
[0015] Figure 1 The utility model is a schematic diagram of the structure of the radio frequency front-end system of the satellite communication ground terminal transceiver. DETAILED DESCRIPTION
[0016] 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.
[0017] The radio frequency front-end system of the satellite communication ground terminal transceiver proposed in the utility model is as follows Figure 1 As shown, it includes a signal receiving module and a signal transmitting module.
[0018] The signal receiving module includes an antenna (ANT), a low noise amplifier (LNA), a phase shifter (PhaseShifter), 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).
[0019] Specifically, in the signal receiving direction, after the antenna receives the signal, it sends the signal to the low noise amplifier, which 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 multiple signals. The phase shifter sends the phase-shifted signal to the bandpass filter, which filters the multiple signals, 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 paths 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.
[0020] The signal transmission module includes a digital baseband part (Digital Baseband), 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 phase shifter (Phase Shifter), an analog pre-distortion module (APD), and a power amplifier (PA).
[0021] Specifically, in the direction of signal transmission, the digital baseband part sends the multi-channel signals to be transmitted 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, which 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 shifter adjusts the phase of the frequency signal. The mixer mixes the signal after the low-pass filter 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 multi-channel 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 signal, removes 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 phase shifter, which adjusts the phase of the transmitted signal. The phase shifter sends the signal after adjusting the phase to the analog predistortion module, which introduces nonlinear distortion to preprocess the signal, effectively compensating for the nonlinear distortion in the RF system, enhancing the linearity of the signal and reducing distortion. The analog predistortion module sends the preprocessed 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.
[0022] The utility model introduces appropriate nonlinear distortion to compensate for the nonlinear distortion generated in the power amplifier, thereby improving the linearity of the signal when high power is output.
[0023] 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. In addition, the analog pre-distortion module also integrates interference suppression algorithms, which can effectively filter out various interference signals and further improve communication quality. The RF front-end system has excellent anti-interference capabilities and long life characteristics, providing a strong guarantee for the reliable operation of wireless communication systems.
[0024] The analog pre-distortion circuit and the power amplifier circuit are integrated into a packaged chip, which not only reduces the size of the RF front end, but also improves its integration. This design makes the entire system more compact and efficient, and has excellent linearity performance at high power output.
[0025] The RF front-end system uses high-performance semiconductor materials such as silicon and gallium arsenide. These materials have excellent electron mobility and high-frequency performance, which can support higher-speed data transmission and more stable signal processing. In addition, we also combine advanced signal processing technologies such as multiple-input multiple-output (MIMO) and beamforming technology to enable the architecture to achieve higher sensitivity and faster response speed, thereby supporting wider frequency bands and higher data rates.
[0026] The RF front-end system uses a variety of advanced packaging technologies and connection methods. For example, the use of microstrip or coplanar waveguide technology can minimize signal loss and ensure signal consistency throughout the system. In addition, by precisely controlling the connection method of each component and optimizing the circuit layout, interference and noise can be further reduced, improving the overall performance of the system.
[0027] The RF front-end system proposed in the utility model also has excellent scalability and flexibility. It can be flexibly configured and adjusted according to different communication protocols and application requirements to meet the communication needs in different scenarios. Whether it is mobile communication, satellite communication or Internet of Things application, this architecture can provide a stable and efficient communication solution.
[0028] The RF front-end system proposed in this utility model successfully solves the problems existing in the traditional RF front-end by optimizing the signal processing process, adopting high-performance semiconductor materials and advanced signal processing technology, integrating analog pre-distortion circuits, and adopting advanced packaging technology and connection methods, and provides users with a reliable, efficient and scalable solution. It can not only meet the needs of modern wireless communication systems for high performance and stability, but also lay a solid foundation for the future development of communication technology. With the continuous advancement of wireless communication technology and the continuous expansion of application fields, this RF front-end system will play a more important role in the future and promote the continuous innovation and development of wireless communication technology.
[0029] 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 radio frequency front-end system of a satellite communication ground terminal transceiver, comprising 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 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-to-analog converter, a low-pass filter, a mixer, a local oscillator, a phase shifter, a power combiner, an amplifier, a bandpass filter, a phase shifter, an analog predistortion module, and a power amplifier; In the signal sending direction, the digital baseband part sends the multi-channel signals to be sent 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 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 RF front-end system of the satellite communication ground terminal transceiver according to claim 1, characterized in that: In the signal receiving direction, after the antenna receives the signal, it sends the signal to the 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 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 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 RF front-end system of the satellite communication ground terminal transceiver according to claim 2, characterized in that: The analog predistortion module integrates adaptive filtering and dynamic range control algorithms.
4. The RF front-end system of the satellite communication ground terminal transceiver according to claim 3, characterized in that: The analog pre-distortion module also integrates an interference suppression algorithm.
5. The RF front-end system of the satellite communication ground terminal transceiver according to claim 4, characterized in that: The analog pre-distortion circuit and the power amplifier circuit are integrated into one package chip.
6. The RF front-end system of the satellite communication ground terminal transceiver according to claim 5, characterized in that: The system uses high-performance semiconductor materials.