射频教学套件的研究与设计

发布时间：2018-04-24 04:13

本文选题：教学套件 + 收发机　；参考：《东南大学》2015年硕士论文

【摘要】：传统射频教学实验设备倾向于部件级别的教学,往往功能单一、操作不便,难以适应现代教学以及培养射频系统级人才的需求。本文针对当前射频实验教学的实际需要,研制了一套功能齐全且操作简单的射频实验教学套件。本文首先根据教学需要,提出了一种操作便捷、功能丰富的射频教学实验套件方案,并对其结构及功能进行了分析和阐述,确定了技术实施方案。本文中所设计的射频教学套件采用子系统搭建的方案,在同一平台上搭建出基带信号子系统、射频发射子系统、射频接收子系统,相干检测子系统、电源及控制子系统共五个部分。最终进行PCB版图设计,并实现教学套件样机。本文所设计的教学套件中基带信号子系统电路使用单片机和FPGA相结合的硬件架构,单片机为主控部分,FPGA用于编解码和电源控制。学生可以将教学套件通过USB2.0接口与电脑相连完成数字通信或测量系统实验。射频发射子系统和射频接收子系统中包含了锁相环、混频器、功率放大器、低噪放等电路,其中接收通道中的混频器设计为镜像抑制混频器。射频收发子系统中每个模块都有输入输出端口,既可以完成单个模块的实验测试,也可以使用同轴电缆连接子系统完成整个射频收发系统的实验测试。电源及控制子系统中包括整个电源网络布局和各个模块电路的电源控制。另外相干检测子系统为此教学套件的特色功能,用户可以在此平台上设计雷达或频域反射计原理实验。对整个教学套件电路进行调试并给出了测试结果,对测试中出现的问题进行了分析并给出了技术改进方案。
[Abstract]:The traditional RF teaching experiment equipment tends to be part level teaching, which often has a single function and inconvenient operation, so it is difficult to meet the needs of modern teaching and the training of personnel of RF system level. In order to meet the practical needs of current RF experiment teaching, a set of RF experimental teaching kit with complete function and simple operation is developed in this paper. In this paper, according to the teaching needs, a convenient and rich RF teaching experiment package is put forward, and its structure and function are analyzed and expounded, and the technical implementation scheme is determined. The RF teaching package designed in this paper adopts the scheme of subsystem, and builds the baseband signal subsystem, radio frequency transmitting subsystem, radio frequency receiving subsystem, coherent detection subsystem on the same platform. There are five parts in power supply and control subsystem. Finally, the PCB layout design, and the implementation of the teaching kit prototype. The circuit of baseband signal subsystem designed in this paper is based on the hardware architecture of single chip microcomputer and FPGA, which is the main control part for coding and decoding and power supply control. Students can complete digital communication or measurement system experiments by connecting the teaching kit to the computer via the USB2.0 interface. The RF transmitting subsystem and the RF receiving subsystem include phase-locked loop, mixer, power amplifier, low noise amplifier and so on. The mixer in the receiving channel is designed as mirror rejection mixer. In the RF transceiver subsystem, each module has an input and output port, which can not only complete the experimental test of a single module, but also use coaxial cable connection subsystem to complete the experimental test of the whole RF transceiver system. The power supply and control subsystem includes the whole power supply network layout and the power control of each module circuit. In addition, the coherent detection subsystem can design the principle experiment of radar or frequency-domain reflectometer on this platform. The circuit of the whole teaching package is debugged and the test results are given. The problems in the test are analyzed and the technical improvement scheme is given.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN702;G642

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