Ultra-wideband high-flatness attenuation phase shift system and device
By using high-flatness phase-shifting chips, voltage-controlled attenuators, and multi-beam antenna modules in the attenuation and phase-shifting system, combined with the beamforming algorithm, the problems of cumbersome phase calibration and insufficient phase flatness in traditional systems are solved, and a better solution is achieved. Efficient and more accurate testing process.
Patent Information
- Application Number
- CN202411257060.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-01-21
AI Technical Summary
The traditional attenuation phase shifting system is cumbersome and time-consuming during the phase calibration process, and the phase flatness is insufficient, resulting in insufficiency of testing.
Using a high-flatness phase-shifting chip and a high-precision DAC, combined with a voltage-controlled attenuator and a multi-beam antenna module, the beam shape and direction are optimized through a beam forming algorithm to improve phase flatness.
It greatly reduces the calibration time, improves the test efficiency and accuracy, reduces the workload, and improves the signal transmission quality and stability of the system.
Smart Images
Figure CN119340671A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of communication testing, and in particular to an ultra-wideband high-flatness attenuation phase shifting system and a device. Background Art
[0002] In the field of communication testing, the attenuation phase shifting system is a key device, and its performance directly affects the accuracy and efficiency of the test. However, there are significant problems in the application of the traditional attenuation phase shifting system: first, the phase calibration process is cumbersome and time-consuming, including the calibration of the initial phase value and the calibration with attenuation changes to ensure phase consistency; second, the phase flatness is insufficient, resulting in a small frequency band covered by the calibration frequency point. For the test requirements of high phase accuracy, a large number of frequency points need to be calibrated. For each additional frequency point, the calibration time doubles, which greatly reduces the test efficiency. Summary of the invention
[0003] In view of the problem that the phase calibration process of the attenuation phase shifting system in the prior art is complicated and time-consuming, the present invention provides an ultra-wideband high-flatness attenuation phase shifting system and device to improve phase flatness and reduce calibration time and workload.
[0004] In order to achieve the above technical objectives, the present invention provides a technical solution, which is an ultra-wideband high-flatness attenuation phase shifting system, comprising: The main control module is used to control and issue instructions to the attenuation phase shift module, multi-beam antenna module and signal processing module; the attenuation phase shift module adopts a high-flatness phase shift chip and a high-precision DAC, combined with a voltage-controlled attenuator; The multi-beam antenna module dynamically adjusts the phase and amplitude of each antenna element in the array based on the phased array antenna, and optimizes the shape and direction of the beam through the beamforming algorithm; Signal processing module, used for signal reception, processing and analysis.
[0005] In this technical solution, a high-flatness phase-shift chip is used. When the center frequency is calibrated, it can cover ±200M or 400M bandwidth. Within this bandwidth, the phase deviation can be guaranteed to be within ±1.5°; the early calibration time is greatly reduced, and the test efficiency is improved; the attenuation and phase shift accuracy are improved, making the test more refined and accurate. The flatness is increased to ±200M of the center frequency; in this way, for the same frequency band, the calibration time will be shortened to 1 / 4 of the original, and there is no need to frequently switch the frequency when using it, which makes the operation simpler and greatly improves the efficiency; in addition, this product uses a voltage-controlled attenuator and a voltage-controlled phase shifter as well as a 12-bit DAC to increase the attenuation step to 0.1dB and the phase accuracy to 0.1°. Compared with traditional digital chips, the step and accuracy have been significantly improved. The multi-beam antenna module realizes the generation, shaping and switching of beams. Through the beamforming algorithm, the shape and direction of the beam are optimized to reduce the mutual interference between beams. The shaping algorithm also makes fine adjustments to the phase to ensure that the beam has good phase flatness at different angles and distances.
[0006] The present invention is further configured as follows: the attenuation phase shifting module comprises: The bias circuit unit, based on the bandgap reference principle, provides stable voltage and current with zero temperature coefficient for the phase shift chip; A driving circuit unit, used for amplifying the power of the control signal generated by the digital control core, wherein the driving circuit is located between the power supply main circuit and the digital control core; According to the characteristics of the phase-shift chip, the bias circuit and the drive circuit are simulated and analyzed to simulate the voltage and current changes in different frequency bands.
[0007] In this technical solution, the bias circuit unit provides a stable voltage and current with zero temperature coefficient for the phase shift chip based on the bandgap reference principle, ensuring the performance stability and accuracy of the phase shift chip under different temperature environments. The drive circuit unit effectively amplifies the control signal generated by the digital control core, and acts as a bridge to connect the main power circuit and the digital control core, ensuring smooth signal transmission and amplification. The bias circuit and drive circuit are simulated and analyzed, simulating the voltage and current changes under different frequency bands, reflecting the scientificity and rigor of the design process, which helps to optimize circuit performance and prevent potential problems.
[0008] The present invention is further configured as follows: the beamforming algorithm includes: By means of digital signal processing, the phase and amplitude of the signal received or transmitted by each antenna unit are adjusted to synthesize the required beam shape; Calculate the phase and amplitude weights for each antenna element based on the target direction and the array geometry to ensure the beam is pointed in the target direction. The signal of the antenna array is preprocessed using the beamforming matrix, and the phase and amplitude of the signal are adjusted through matrix multiplication; in a dynamic environment, the beamforming parameters are automatically adjusted according to the characteristics of the received signal.
[0009] In this technical solution, the algorithm can accurately adjust the phase and amplitude of the signal received or transmitted by each antenna unit by means of digital signal processing. This adjustment enables the antenna array to synthesize the required beam shape and achieve precise control of the signal. The algorithm calculates the phase and amplitude weighted values of each antenna unit according to the target direction and the geometric structure of the antenna array. These weighted values ensure that the beam can accurately point to the target direction, improving the accuracy and efficiency of communication or detection. The signal of the antenna array is preprocessed using the beamforming matrix, and the phase and amplitude of the signal are quickly adjusted through matrix multiplication. This preprocessing method improves the efficiency of signal processing, allowing the beamforming algorithm to perform well in real-time communication or detection tasks. In a dynamic environment, the algorithm can automatically adjust the beamforming parameters according to the characteristics of the received signal. This adaptability enables the algorithm to cope with changes in the environment and maintain the stability and accuracy of the beamforming, thereby improving the robustness and reliability of the system.
[0010] The present invention is further configured as follows: the bandgap reference principle includes: Two bipolar transistors operating at different current densities generate two base-emitter voltage differences with different temperature coefficients, thereby obtaining a voltage reference with a zero temperature coefficient; A negative feedback circuit is constructed using an operational amplifier to compare the generated reference voltage with the reference voltage and adjust the circuit parameters through the feedback network.
[0011] In this technical solution, by utilizing two bipolar transistors operating at different current densities, this principle can generate two base-emitter voltage differences with different temperature coefficients. This design cleverly offsets the effect of temperature on voltage, thereby obtaining a voltage reference with a zero temperature coefficient, ensuring the stability and accuracy of the voltage. An operational amplifier is used to construct a negative feedback circuit that can compare the generated reference voltage with the reference voltage with high precision. Through the feedback network, the circuit can automatically adjust its parameters to ensure the consistency between the reference voltage and the reference voltage, further improving the accuracy and stability of the voltage.
[0012] The present invention is further configured such that the flatness of the high-flatness phase-shift chip is ±200M of the center frequency, which ensures that the phase response of the chip in a wide frequency band remains highly consistent, which helps to improve the signal transmission quality and stability of the entire system, especially in applications that need to process broadband signals, the chip can show more superior performance.
[0013] The present invention is further configured as follows: the main control module includes a first SPI communication unit, a LAN communication unit, a screen communication unit and an IO processing unit, the LAN communication unit is connected to a LAN interface, the LAN interface can support remote control methods of a host computer, scripts and web pages, the screen communication unit is connected to a screen interface, the screen interface can support a baud rate of 115200bps, and the IO processing unit is used to implement buttons, indications or triggers.
[0014] In this technical solution, the main control module includes a first SPI communication unit, a LAN communication unit and a screen communication unit, providing a variety of communication methods and enhancing the flexibility and scalability of the system. The LAN communication unit is connected to the LAN interface, so that the system can be remotely controlled through a host computer, script or web page. This feature greatly facilitates the user's remote monitoring and operation of the system, and improves the convenience and management efficiency of the system. The screen communication unit is connected to the screen interface, and the screen interface supports a baud rate of up to 115200bps, so that the screen can display the system status and information in real time and at high speed, providing users with a clear and smooth visual experience. The design of the IO processing unit enables the system to easily implement functions such as key input, status indication and external triggering, enhances the system's ability to interact with external devices, and enables the system to better adapt to various complex application scenarios.
[0015] The present invention is further configured as follows: the signal processing module includes a second SPI communication unit, an ID configuration unit and a communication indicator light unit; the second SPI communication unit receives instructions from the first SPI communication unit, and after parsing, realizes phase and attenuation configuration through an attenuation phase shifting module.
[0016] In this technical solution, the signal processing module receives instructions from the first SPI communication unit through the second SPI communication unit, realizing fast and efficient communication between modules. This design ensures the timely transmission and processing of instructions and improves the overall response speed of the system. The second SPI communication unit can not only receive instructions, but also parse the instructions, and configure the phase and attenuation through the attenuation phase shift module according to the parsing results. This feature enables the signal processing module to intelligently respond to instructions from the upper module and complete complex signal processing tasks. Through the attenuation phase shift module, the signal processing module can realize flexible configuration of phase and attenuation. This design enables the system to adjust the characteristics of the signal according to actual needs to meet different application scenarios and needs.
[0017] An ultra-wideband high-flatness attenuation phase shifting device uses the above-mentioned ultra-wideband high-flatness attenuation phase shifting system, including a main control board, a network port board for communicating with an external network, a screen and a radio frequency board.
[0018] In this technical solution, multiple functional modules such as the main control board, network port board, screen and radio frequency board are integrated to achieve a highly integrated design. This design makes the device physically more compact and easy to install and deploy. The design of the network port board enables the device to communicate with the external network, realizing the remote transmission and exchange of data. This enhances the interconnection capability of the device, allowing users to remotely monitor and control the operating status of the device. As an important interface for human-computer interaction, the screen provides users with an intuitive and clear operating interface. Users can view the working status, parameter settings and other information of the device in real time through the screen, and perform corresponding operations and adjustments. As the core functional module of the device, the radio frequency board is responsible for realizing the function of ultra-wideband high-flatness attenuation phase shifting. This enables the device to have excellent performance in RF signal processing and can meet various complex application scenarios and requirements.
[0019] The beneficial effects of the present invention are as follows: (1) improving phase flatness, reducing calibration time and workload; (2) using a high-flatness phase shift chip, when calibrating the center frequency, it can cover ±200M or 400M bandwidth, and within this bandwidth, the phase deviation can be guaranteed to be within ±1.5°; greatly reducing the initial calibration time and improving test efficiency; improving attenuation and phase shift accuracy, making the test more refined and accurate; (3) improving the flatness to ±200M of the center frequency; in this way, for the same frequency band, the calibration time will be shortened to 1 / 4 of the original time, and there is no need to frequently switch frequencies during use, which makes the operation simpler and greatly improves efficiency; in addition, this product uses a voltage-controlled attenuator, a voltage-controlled phase shifter and a 12-bit DAC to increase the attenuation step to 0.1dB and the phase accuracy to 0.1°, which is significantly improved compared with traditional digital chips in terms of step and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the process of the ultra-wideband high-flatness attenuation phase shifting system of the present invention; Figure 2 It is a structural schematic diagram of an ultra-wideband high-flatness attenuation phase shifting device of the present invention; Figure 3 It is a schematic structural diagram of the attenuation phase shifting module of the ultra-wideband high-flatness attenuation phase shifting system of the present invention. DETAILED DESCRIPTION
[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0022] like Figure 1 , Figure 2 , Figure 3 As shown, as a first embodiment of the present invention, an ultra-wideband high-flatness attenuation phase shifting system includes: The main control module is used to control and issue instructions to the attenuation phase shift module, multi-beam antenna module and signal processing module; the attenuation phase shift module adopts a high-flatness phase shift chip and a high-precision DAC, combined with a voltage-controlled attenuator; The multi-beam antenna module dynamically adjusts the phase and amplitude of each antenna element in the array based on the phased array antenna, and optimizes the shape and direction of the beam through the beamforming algorithm; Signal processing module, used for signal reception, processing and analysis.
[0023] In this embodiment, a high-flatness phase-shift chip is used. When the center frequency is calibrated, it can cover ±200M or 400M bandwidth. Within this bandwidth, the phase deviation can be guaranteed to be within ±1.5°; the early calibration time is greatly reduced, and the test efficiency is improved; the attenuation and phase shift accuracy are improved, making the test more refined and accurate. The flatness is increased to ±200M of the center frequency; in this way, for the same frequency band, the calibration time will be shortened to 1 / 4 of the original, and there is no need to frequently switch the frequency when using it, which makes the operation simpler and greatly improves the efficiency; in addition, this product uses a voltage-controlled attenuator and a voltage-controlled phase shifter as well as a 12-bit DAC to increase the attenuation step to 0.1dB and the phase accuracy to 0.1°. Compared with traditional digital chips, the step and accuracy have been significantly improved. The multi-beam antenna module realizes the generation, shaping and switching of beams. Through the beamforming algorithm, the shape and direction of the beam are optimized to reduce the mutual interference between beams. The shaping algorithm also makes fine adjustments to the phase to ensure that the beam has good phase flatness at different angles and distances.
[0024] In one embodiment of the present invention, the attenuation phase shifting module comprises: The bias circuit unit, based on the bandgap reference principle, provides stable voltage and current with zero temperature coefficient for the phase shift chip; A driving circuit unit, used for amplifying the power of the control signal generated by the digital control core, wherein the driving circuit is located between the power supply main circuit and the digital control core; According to the characteristics of the phase-shift chip, the bias circuit and the drive circuit are simulated and analyzed to simulate the voltage and current changes in different frequency bands.
[0025] In this technical solution, the bias circuit unit provides a stable voltage and current with zero temperature coefficient for the phase shift chip based on the bandgap reference principle, ensuring the performance stability and accuracy of the phase shift chip under different temperature environments. The drive circuit unit effectively amplifies the control signal generated by the digital control core, and acts as a bridge to connect the main power circuit and the digital control core, ensuring smooth signal transmission and amplification. The bias circuit and drive circuit are simulated and analyzed, simulating the voltage and current changes in different frequency bands, reflecting the scientificity and rigor of the design process, which helps to optimize circuit performance and prevent potential problems.
[0026] In one embodiment of the present invention, the beamforming algorithm includes: By means of digital signal processing, the phase and amplitude of the signal received or transmitted by each antenna unit are adjusted to synthesize the required beam shape; Calculate the phase and amplitude weights for each antenna element based on the target direction and the array geometry to ensure the beam is pointed in the target direction. The signal of the antenna array is preprocessed using the beamforming matrix, and the phase and amplitude of the signal are adjusted through matrix multiplication; in a dynamic environment, the beamforming parameters are automatically adjusted according to the characteristics of the received signal.
[0027] In this technical solution, the algorithm can accurately adjust the phase and amplitude of the signal received or transmitted by each antenna unit by digital signal processing. This adjustment enables the antenna array to synthesize the required beam shape and achieve precise control of the signal. The algorithm calculates the phase and amplitude weighted values of each antenna unit according to the target direction and the geometric structure of the antenna array. These weighted values ensure that the beam can accurately point to the target direction, improving the accuracy and efficiency of communication or detection. The signal of the antenna array is preprocessed using the beamforming matrix, and the phase and amplitude of the signal are quickly adjusted through matrix multiplication. This preprocessing method improves the efficiency of signal processing, allowing the beamforming algorithm to perform well in real-time communication or detection tasks. In a dynamic environment, the algorithm can automatically adjust the beamforming parameters according to the characteristics of the received signal. This adaptability enables the algorithm to cope with changes in the environment and maintain the stability and accuracy of the beamforming, thereby improving the robustness and reliability of the system.
[0028] In one embodiment of the present invention, the bandgap reference principle includes: Two bipolar transistors operating at different current densities generate two base-emitter voltage differences with different temperature coefficients, thereby obtaining a voltage reference with a zero temperature coefficient; A negative feedback circuit is constructed using an operational amplifier to compare the generated reference voltage with the reference voltage and adjust the circuit parameters through the feedback network.
[0029] In this technical solution, by utilizing two bipolar transistors operating at different current densities, this principle can generate two base-emitter voltage differences with different temperature coefficients. This design cleverly offsets the effect of temperature on voltage, thereby obtaining a voltage reference with a zero temperature coefficient, ensuring the stability and accuracy of the voltage. An operational amplifier is used to construct a negative feedback circuit that can compare the generated reference voltage with the reference voltage with high precision. Through the feedback network, the circuit can automatically adjust its parameters to ensure the consistency between the reference voltage and the reference voltage, further improving the accuracy and stability of the voltage.
[0030] Preferably, the flatness of the high-flatness phase-shift chip is ±200M of the center frequency, which ensures that the phase response of the chip remains highly consistent within a wide frequency band, helping to improve the signal transmission quality and stability of the entire system, especially in applications that require processing broadband signals, the chip can show more superior performance.
[0031] The main control module includes a first SPI communication unit, a LAN communication unit, a screen communication unit and an IO processing unit. The LAN communication unit is connected to a LAN interface, and the LAN interface can support remote control methods of a host computer, scripts and web pages. The screen communication unit is connected to a screen interface, and the screen interface can support a baud rate of 115200bps. The IO processing unit is used to implement buttons, indications or triggers.
[0032] In this technical solution, the main control module includes a first SPI communication unit, a LAN communication unit and a screen communication unit, which provides a variety of communication methods and enhances the flexibility and scalability of the system. The LAN communication unit is connected to the LAN interface, so that the system can be remotely controlled through a host computer, script or web page. This feature greatly facilitates the user's remote monitoring and operation of the system, and improves the convenience and management efficiency of the system. The screen communication unit is connected to the screen interface, and the screen interface supports a baud rate of up to 115200bps, so that the screen can display the system status and information in real time and at high speed, providing users with a clear and smooth visual experience. The design of the IO processing unit enables the system to easily implement functions such as key input, status indication and external triggering, enhances the system's ability to interact with external devices, and enables the system to better adapt to various complex application scenarios.
[0033] It can be understood that the signal processing module includes a second SPI communication unit, an ID configuration unit and a communication indicator light unit. The second SPI communication unit receives the instruction of the first SPI communication unit, and after parsing, the phase and attenuation configuration is realized through the attenuation phase shift module. The signal processing module receives the instruction from the first SPI communication unit through the second SPI communication unit, realizing fast and efficient communication between modules. This design ensures the timely transmission and processing of instructions and improves the overall response speed of the system. The second SPI communication unit can not only receive instructions, but also parse the instructions, and realize the phase and attenuation configuration through the attenuation phase shift module according to the parsing results. This feature enables the signal processing module to intelligently respond to instructions from the upper module and complete complex signal processing tasks. Through the attenuation phase shift module, the signal processing module can realize flexible configuration of phase and attenuation. This design enables the system to adjust the characteristics of the signal according to actual needs to meet different application scenarios and needs.
[0034] like Figure 1 , Figure 2 , Figure 3 As shown, as the second embodiment of the present invention, an ultra-wideband high-flatness attenuation phase shifting device, using the above-mentioned ultra-wideband high-flatness attenuation phase shifting system, includes a main control board, a network port board for communicating with an external network, a screen and a radio frequency board.
[0035] In this technical solution, multiple functional modules such as the main control board, network port board, screen and radio frequency board are integrated to achieve a highly integrated design. This design makes the device physically more compact and easy to install and deploy. The design of the network port board enables the device to communicate with the external network, realizing the remote transmission and exchange of data. This enhances the interconnection capability of the device, allowing users to remotely monitor and control the operating status of the device. As an important interface for human-computer interaction, the screen provides users with an intuitive and clear operating interface. Users can view the working status, parameter settings and other information of the device in real time through the screen, and perform corresponding operations and adjustments. As the core functional module of the device, the radio frequency board is responsible for realizing the function of ultra-wideband high-flatness attenuation phase shifting. This enables the device to have excellent performance in RF signal processing and can meet various complex application scenarios and requirements.
[0036] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.
Claims
1. An ultra-wideband high-flatness attenuation phase shifting system, characterized in that: include: The main control module is used to control and issue instructions to the attenuation phase shift module, multi-beam antenna module and signal processing module; Attenuation phase shift module, using high flatness phase shift chip and high precision DAC, combined with voltage controlled attenuator; The multi-beam antenna module dynamically adjusts the phase and amplitude of each antenna element in the array based on the phased array antenna, and optimizes the shape and direction of the beam through the beamforming algorithm; Signal processing module, used for signal reception, processing and analysis.
2. The ultra-wideband high-flatness attenuation phase shifting system according to claim 1, characterized in that: The attenuation phase shifting module comprises: The bias circuit unit, based on the bandgap reference principle, provides stable voltage and current with zero temperature coefficient for the phase shift chip; A driving circuit unit, used for amplifying the power of the control signal generated by the digital control core, wherein the driving circuit is located between the power supply main circuit and the digital control core; According to the characteristics of the phase-shift chip, the bias circuit and the drive circuit are simulated and analyzed to simulate the voltage and current changes in different frequency bands.
3. The ultra-wideband high-flatness attenuation phase shifting system according to claim 1, characterized in that: The beamforming algorithm includes: By means of digital signal processing, the phase and amplitude of the signal received or transmitted by each antenna unit are adjusted to synthesize the required beam shape; Calculate the phase and amplitude weights for each antenna element based on the target direction and the array geometry to ensure the beam is pointed in the target direction. The signal of the antenna array is preprocessed using a beamforming matrix, and the phase and amplitude of the signal are adjusted by matrix multiplication; In a dynamic environment, the beamforming parameters are automatically adjusted according to the characteristics of the received signal.
4. The ultra-wideband high-flatness attenuation phase shifting system according to claim 2, characterized in that: The bandgap reference principle includes: Two bipolar transistors operating at different current densities generate two base-emitter voltage differences with different temperature coefficients, thereby obtaining a voltage reference with a zero temperature coefficient; A negative feedback circuit is constructed using an operational amplifier to compare the generated reference voltage with the reference voltage and adjust the circuit parameters through the feedback network.
5. The ultra-wideband high-flatness attenuation phase shifting system according to claim 1, characterized in that: The flatness of the high-flatness phase-shift chip is ±200M at the center frequency.
6. The ultra-wideband high-flatness attenuation phase shifting system according to claim 1, characterized in that: The main control module includes a first SPI communication unit, a LAN communication unit, a screen communication unit and an IO processing unit. The LAN communication unit is connected to a LAN interface, and the LAN interface can support remote control methods of a host computer, scripts and web pages. The screen communication unit is connected to a screen interface, and the screen interface can support a baud rate of 115200bps. The IO processing unit is used to implement buttons, indications or triggers.
7. The ultra-wideband high-flatness attenuation phase shifting system according to claim 6, characterized in that: The signal processing module includes a second SPI communication unit, an ID configuration unit and a communication indicator light unit. The second SPI communication unit receives instructions from the first SPI communication unit, and after parsing, implements phase and attenuation configuration through an attenuation phase shifting module.
8. An ultra-wideband high-flatness attenuation phase shifting device, used for applying the ultra-wideband high-flatness attenuation phase shifting system according to any one of claims 1 to 7, characterized in that: It includes a main control board, a network port board for communicating with the external network, a screen and a radio frequency board.