快速跳频锁相环芯片ADF4193在工程实践中的应用
发布时间：2018-08-13 10:57
【摘要】：ADF4193作为一款频率综合器,主要在无线接收和发射单元中作为上变频或者下变频模块的本地振荡器使用。它的重点是环路带宽开关技术确保了在某些应用中调频时间对于时隙间隔的要求,减少了电路的成本、复杂程度以及电路板面积和电磁兼容等问题。本文实现了一个基于ADF4193的锁相环电路,目的在于输出频率在1640～1900Mhz的射频信号,并完成30us内的快速跳频。在电路设计方面,首先根据指定的指标比如输出频率、功率、相位噪声、跳频时间等来进行VC0和滤波器的选择。再根据选择的有源器件确定电源方案,并进行电源芯片的选取和设计。最后根据相关的环路滤波器仿真软件、配置字模拟软件等工具进行环路滤波器的设计和配置程序的编写。器件选择好后通过EDA工具(这里主要是用了 CADENCE ALLEGRO)来进行原理图的绘制,确保电气连接的正确可靠。再根据原理图进行PCB的布局和走线。PCB完成后拿到制版厂进行电路板的制作,并开展元器件的贴装工作。电路板的实物完成后,利用实验仪表进行相关指标的测试,没有达到预计要求的指标通过综合分析找到原因差别,并进行调试和优化工作,通过调试环路滤波器带宽、衰减器衰减量、输入输出匹配等参数使电路性能达到最优。本文最终完成了一个快速跳频的锁相环电路的设计和调试工作,在确保信号的稳定度和相位噪声的前提下,实现了频率的快速跳变,减小了跳频时间。并根据相关软件的仿真和调试结果,对过程中出现的问题进行了总结和分析。
[Abstract]:As a frequency synthesizer, ADF4193 is mainly used in wireless receiving and transmitting unit as local oscillator of up-conversion or down-conversion module. It focuses on the loop bandwidth switch technology to ensure the frequency modulation time requirements for slot spacing in some applications, reducing the cost of the circuit, complexity, circuit board area and electromagnetic compatibility, and so on. A phase-locked loop circuit based on ADF4193 is implemented in this paper. The purpose of this circuit is to output the RF signal of frequency in 1640~1900Mhz and to complete the fast frequency hopping in 30us. In the aspect of circuit design, the VC0 and filter are selected according to the specified parameters such as output frequency, power, phase noise, frequency hopping time and so on. Then, according to the selected active devices, the power supply scheme is determined, and the selection and design of the power chip is carried out. Finally, the design of loop filter and the programming of configuration program are carried out according to the simulation software of loop filter and the software of configuration word. After the device is selected, the EDA tool is used to draw the schematic diagram with CADENCE ALLEGRO) to ensure the correct and reliable electrical connection. Then according to the schematic diagram, the layout of PCB and wiring. PCB is taken to the plate-making factory to make the circuit board, and the assembly of components is carried out. After the physical completion of the circuit board, the experimental instrument is used to test the related indexes, and the cause difference is found by comprehensive analysis, and the debugging and optimization work is carried out, and the bandwidth of the loop filter is adjusted by debugging the loop filter bandwidth. The parameters of attenuator attenuation, input and output matching make the circuit performance optimal. In this paper, the design and debugging of a fast frequency hopping PLL circuit is finally completed. On the premise of ensuring the stability of the signal and the phase noise, the fast frequency hopping is realized and the frequency hopping time is reduced. According to the simulation and debugging results of related software, the problems in the process are summarized and analyzed.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN74
本文编号：2180767
[Abstract]:As a frequency synthesizer, ADF4193 is mainly used in wireless receiving and transmitting unit as local oscillator of up-conversion or down-conversion module. It focuses on the loop bandwidth switch technology to ensure the frequency modulation time requirements for slot spacing in some applications, reducing the cost of the circuit, complexity, circuit board area and electromagnetic compatibility, and so on. A phase-locked loop circuit based on ADF4193 is implemented in this paper. The purpose of this circuit is to output the RF signal of frequency in 1640~1900Mhz and to complete the fast frequency hopping in 30us. In the aspect of circuit design, the VC0 and filter are selected according to the specified parameters such as output frequency, power, phase noise, frequency hopping time and so on. Then, according to the selected active devices, the power supply scheme is determined, and the selection and design of the power chip is carried out. Finally, the design of loop filter and the programming of configuration program are carried out according to the simulation software of loop filter and the software of configuration word. After the device is selected, the EDA tool is used to draw the schematic diagram with CADENCE ALLEGRO) to ensure the correct and reliable electrical connection. Then according to the schematic diagram, the layout of PCB and wiring. PCB is taken to the plate-making factory to make the circuit board, and the assembly of components is carried out. After the physical completion of the circuit board, the experimental instrument is used to test the related indexes, and the cause difference is found by comprehensive analysis, and the debugging and optimization work is carried out, and the bandwidth of the loop filter is adjusted by debugging the loop filter bandwidth. The parameters of attenuator attenuation, input and output matching make the circuit performance optimal. In this paper, the design and debugging of a fast frequency hopping PLL circuit is finally completed. On the premise of ensuring the stability of the signal and the phase noise, the fast frequency hopping is realized and the frequency hopping time is reduced. According to the simulation and debugging results of related software, the problems in the process are summarized and analyzed.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN74
【参考文献】
相关期刊论文 前2条
1 曹太强,丁庆生;小数分频频率合成技术浅析[J];重庆三峡学院学报;2004年02期
2 孙增友,滕志军,谢声斌,高电波;一种可预置频率合成器的设计[J];东北电力学院学报;1998年02期
，本文编号：2180767
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