无线数据传输系统信号完整性研究

发布时间：2018-08-09 15:21

【摘要】：随着电路速率的不断提高,芯片加工工艺的改进,互连通道对信号的影响越来越明显,信号的畸变已经到了影响电路功能实现的程度。制造技术进步的一个直接后果是信号完整性问题在产品设计过程中普遍存在。如果信号完整性问题没有从产品设计之初加以研究解决,那么设计完成后的产品将不能够稳定工作。无线通信技术的快速发展使得无线技术广泛应用于多种领域。无线数据传输技术具备成本低、便捷、稳定可靠性高等优势,可满足多种领域的需求。无线数据传输系统信号完整性是保证系统性能及稳定性的基础,因此,其信号完整性研究具有重要意义。针对以上问题,本文以Nordic公司推出的nRF系列无线收发模块为对象,结合先进的信号完整性仿真软件,完成其信号完整性仿真分析研究。论文主要工作如下:根据信号完整性相关理论,深入研究影响系统信号完整性的因素。构建模型,结合理论,探究高速系统中存在的反射、串扰等现象,验证信号完整性问题的解决方法。以工作在2.4GHz~2.5GHz ISM频段的无线芯片nRF24LU1为研究对象,分析无线数字传输系统外围电路设计,使用仿真软件Ansoft HFSS建立2.4GHz1/4波长天线模型,作出仿真分析。最后从原理图、印制电路板角度分析信号完整性,使用先进的仿真软件Altium Designer、Hyperlynx对关键网络进行研究,完成基于nRF24LU1无线模块PCB的电磁兼容性研究。经仿真测试,基于nRF24LU1无线数据传输模块PCB串扰在可接受范围内,电磁兼容性良好。
[Abstract]:With the increasing of the circuit speed and the improvement of the chip processing technology, the influence of the interconnect channel on the signal becomes more and more obvious, and the distortion of the signal has reached the degree of affecting the realization of the circuit function. A direct consequence of the progress of manufacturing technology is that the problem of signal integrity is widespread in the process of product design. If the signal integrity problem is not solved from the beginning of the product design, then the product after the design will not be able to work stably. With the rapid development of wireless communication technology, wireless technology is widely used in many fields. Wireless data transmission technology has the advantages of low cost, convenience, high stability and reliability, and can meet the needs of many fields. The signal integrity of wireless data transmission system is the basis to ensure the performance and stability of the system, so it is of great significance to study the signal integrity of wireless data transmission system. Aiming at the above problems, this paper takes the nRF series of wireless transceiver modules developed by Nordic Company as the object, and combines the advanced signal integrity simulation software to complete the signal integrity simulation analysis and research. The main work of this paper is as follows: according to the theory of signal integrity, the factors that affect the signal integrity of the system are studied in depth. The model is constructed and the theory is combined to explore the phenomena of reflection and crosstalk in high speed system to verify the solution of the signal integrity problem. Taking the wireless chip nRF24LU1 which works in the 2.4GHz~2.5GHz ISM band as the research object, the peripheral circuit design of the wireless digital transmission system is analyzed. The 2.4GHz1/4 wavelength antenna model is established by using the simulation software Ansoft HFSS, and the simulation analysis is made. Finally, the signal integrity is analyzed from the view of schematic diagram and printed circuit board. The key network is studied by using the advanced simulation software Altium designer Hyperlynx, and the electromagnetic compatibility research based on nRF24LU1 wireless module PCB is completed. Simulation results show that PCB crosstalk based on nRF24LU1 wireless data transmission module is acceptable and EMC is good.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.6

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