宽带下变频器广义杂散智能测试与分析研究

为了提高宽带微波下变频器的研发、测试、调试效率,基于广义杂散的概念,建立了相应的自动测试和分析方法。该方法使用自动测试构建杂散方程组,通过杂散组合向量的求解,能够完成对杂散的分类。理论上该方法在一次测试过程中能实现增益、镜频抑制、中频抑制、信号相关杂散、信号无关杂散、互调等多个核心技术指标的测试。为了验证方法的有效性,将其用于K 频段宽带下变频器的研制,详细介绍了相应的硬件平台和软件流程。测试分析结果表明该方法能够正确分析出现的杂散,有效提高测试的智能化程度,从而有助于提高下变频器的性能指标及研发效率。

Research of Generalized Spurious Intelligent Test and Analysis for Broadband Down-Converter

In order to improve the efficiency of research, development, testing and debugging of broadband microwave down-converters, the concept of generalized spurious response is adopted to establish the corresponding methods of automatic testing and analysis. According to this method, automatic test is conducted to construct spurious equations, and the spurious combination vector is solved to achieve the classification of spurs. In theory, this method is applicable to test multiple key indicators simultaneously, such as gain, image frequency suppression, intermediate frequency suppression, signal-related spurious,signal-independent spurious, and inter-modulation. To validate this method, it is adopted for the development of Kband broadband down-converter, with the corresponding hardware platform and software process explained in detail. As suggested by the analytical results, the proposed method is applicable to accurately analyze the spurious, thus improving the intelligence of the test. This is conducive to improving the performance of the down-converter and enhancing the efficiency of its development.