北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (2): 224-232.doi: 10.13700/j.bh.1001-5965.2016.0150

• 论文 • 上一篇    下一篇

VHF/UHF波段发射机互调抑制比测试方法研究

苏东林1, 何洪涛1,2, 耿利飞2, 范秋虎2   

  1. 1. 北京航空航天大学 电子信息工程学院, 北京 100083;
    2. 中国洛阳电子装备试验中心, 洛阳 471003
  • 收稿日期:2016-03-01 出版日期:2017-02-20 发布日期:2016-05-23
  • 通讯作者: 苏东林,E-mail:sdl@buaa.edu.cn E-mail:sdl@buaa.edu.cn
  • 作者简介:苏东林,女,博士,教授,博士生导师。主要研究方向:电磁兼容、电磁环境效应、计算电磁学、抗干扰理论与应用、射频微波电路与系统、新型飞行器机载共形/共用/小型化天线等;何洪涛,男,博士研究生,高级工程师。主要研究方向:电磁兼容试验技术及复杂电磁环境效应评估等;耿利飞,男,博士,工程师。主要研究方向:电磁兼容试验技术、电磁仿真等;范秋虎,男,硕士,工程师。主要研究方向:电磁兼容试验技术、信号与系统等。
  • 基金资助:
    国家自然科学基金(61427803)

Intermodulation attenuation ratio test methods for VHF/UHF band transmitters

SU Donglin1, HE Hongtao1,2, GENG Lifei2, FAN Qiuhu2   

  1. 1. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Luoyang Electronic Equipment Test Center of China, Luoyang 471003, China
  • Received:2016-03-01 Online:2017-02-20 Published:2016-05-23
  • Supported by:
    National Natural Science Foundation of China (61427803)

摘要: 建立了发射机射频电路简化模型,并利用该模型和非线性多项式模型,研究了发射机互调(IM)发射电平与射频前端滤波器插入损耗、干扰信号功率和频率偏差之间的关系,对当前发射机互调抑制比的定义进行了修正;分析了传统发射机互调抑制比测试方法的局限性,设计了一种新型的发射机互调测试链路配置,分析了测试链路关键物理参数间的关联关系,建立了测试数据处理模型,该方法扩宽了测试带宽和功率范围,降低了对测试器件的要求。对实际电台的测试结果表明,本文提出的理论分析结论和发射机互调抑制比测试方法正确有效。

关键词: 发射机互调, 互调发射电平, 互调抑制比, 测试链路, 测试方法

Abstract: The simplified model of transmitter RF circuit was established. Using this model and the nonlinear polynomial model, we studied the relationship of transmitter intermodulation (IM) level between the insertion loss of RF filter, the power and the frequency offset of interference signal. According to results of the theoretical analysis, we found the imperfection of the definition of current transmitter IM attenuation ratio, and also propounded the new definition. We analyzed the limitation of the transmitter IM attenuation ratio test method. In order to get more accurate test data of transmitter IM level, we designed the new configuration of transmitter IM level test link. A new test method was proposed after analyzing the relationship between key physical parameters of the link. We provided the processing model of test data. The new method expands the frequency test band, relaxes the restrictions of transmitter power, and reduces the performance requirement of test device. The new method was used in IM test of a substantial broadcasting station, the test result and the theory analysis are validated, and the rationality and accuracy of the test methods are proved.

Key words: transmitter intermodulation, level of IM product, intermodulation attenuation ratio, test link, test method

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发