混频器芯片测试技术研究与实现
发布时间：2019-06-28 10:02
【摘要】：混频器(Mixer)是通信系统重要模块之一,用于实现接收机的频率转换。国内关于混频器设计的研究常见于文献,而关于混频器的测试研究相对较少,且由于测试方案、测试设备的限制不能实现完整的混频器测试,测试经验的不足也会导致不精确的测试结果,因此研究如何实现混频器各项性能准确、完善的测试尤为重要。本文首介绍混频器的基础知识,包括混频器原理、电路结构和性能指标。然后针对混频器的端口阻抗、转换增益、线性度、噪声系数等主要参数进行了测试方法总结。接着详细讨论射频测试板的去耦、接地等设计要点,在Allegro软件中实现亚德诺半导体(ADI)公司的混频器ADL5801芯片测试板的原理图和测试板设计,交付测试板打样后进行焊接。最后搭建针对混频器芯片不同测试项的测试平台,对900MHz、1900MHz、2500MHz、3500MHz四个射频输入频点进行实际测试,固定中频153MHz下,转换增益分别为:1.78dB、1.76dB、-0.159d B、-0.722dB;1dB压缩点分别为:12.64dBm、12.5dBm、12.5dBm、11.26dBm;三阶交调点分别为:28.24dBm、24.16dBm、22.11d Bm、17.17dBm;噪声系数分别为:9.75dB、11.21dB、12.51dB、16.78dB。与datasheet参考值进行对比后对结果进行了分析,测试结果对比表明本文采取的测试方法基本能够满足混频器芯片测试。文末对论文工作进行梳理总结,同时确定后续工作的努力方向。
[Abstract]:The mixer is one of the important modules of the communication system for realizing the frequency conversion of the receiver. the domestic research on the design of the mixer is common in the literature, and the test study on the mixer is relatively small, and due to the test scheme, the limitation of the test equipment can not realize the complete mixer test, the shortage of the test experience can lead to inaccurate test results, So it is very important to study how to realize the accurate and perfect performance of the mixer. This paper first introduces the basic knowledge of the mixer, including the mixer principle, the circuit structure and the performance index. The main parameters such as the port impedance, the conversion gain, the linearity and the noise figure of the mixer are then summarized. Next, the design points of decoupling and grounding of the RF test board are discussed in detail, and the schematic diagram of the ADL5801 chip test board and the design of the test board of the ADL5801 chip test board of the mixer of the Analog Devices are implemented in the Allegro software, and the test board is delivered for welding. Finally, a test platform for different test items of the mixer chip is set up, and the actual test is carried out on the four radio frequency input frequency points of 900 MHz,1900 MHz,2500 MHz and 3500 MHz. The conversion gain is 1.78 dB, 1.76 dB,-0.159 d B,-0.722 dB at the fixed intermediate frequency of 153 MHz, and the 1 dB compression point is 12.64 dBm, 12.5 dBm, 12.5 dBm, 11.26 dBm, respectively; The third-order intermodulation point is 28.24 dBm, 24.16 dBm, 22.11 d Bm, 17.17 dBm, and the noise figure is 9.75 dB, 11.21 dB, 12.51 dB, 16.78 dB, respectively. The results are compared with the datasheet reference value, and the results of the test show that the test method is basically able to meet the test of the mixer chip. At the end of the paper, the paper summarizes the work of the paper, and determines the direction of the follow-up work.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN773
本文编号：2507208
[Abstract]:The mixer is one of the important modules of the communication system for realizing the frequency conversion of the receiver. the domestic research on the design of the mixer is common in the literature, and the test study on the mixer is relatively small, and due to the test scheme, the limitation of the test equipment can not realize the complete mixer test, the shortage of the test experience can lead to inaccurate test results, So it is very important to study how to realize the accurate and perfect performance of the mixer. This paper first introduces the basic knowledge of the mixer, including the mixer principle, the circuit structure and the performance index. The main parameters such as the port impedance, the conversion gain, the linearity and the noise figure of the mixer are then summarized. Next, the design points of decoupling and grounding of the RF test board are discussed in detail, and the schematic diagram of the ADL5801 chip test board and the design of the test board of the ADL5801 chip test board of the mixer of the Analog Devices are implemented in the Allegro software, and the test board is delivered for welding. Finally, a test platform for different test items of the mixer chip is set up, and the actual test is carried out on the four radio frequency input frequency points of 900 MHz,1900 MHz,2500 MHz and 3500 MHz. The conversion gain is 1.78 dB, 1.76 dB,-0.159 d B,-0.722 dB at the fixed intermediate frequency of 153 MHz, and the 1 dB compression point is 12.64 dBm, 12.5 dBm, 12.5 dBm, 11.26 dBm, respectively; The third-order intermodulation point is 28.24 dBm, 24.16 dBm, 22.11 d Bm, 17.17 dBm, and the noise figure is 9.75 dB, 11.21 dB, 12.51 dB, 16.78 dB, respectively. The results are compared with the datasheet reference value, and the results of the test show that the test method is basically able to meet the test of the mixer chip. At the end of the paper, the paper summarizes the work of the paper, and determines the direction of the follow-up work.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN773
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