论文部分内容阅读
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。
A simplified model of transmitter RF circuit is established. Based on this model and non-linear polynomial model, the relationship between IM transmitter level and RF front-end filter insertion loss, interference signal power and frequency deviation is studied. The definition of the intermodulation suppression ratio of the current transmitter is modified; the limitations of the traditional transmitter intermodulation suppression ratio testing method are analyzed; a new transmitter intermodulation test link configuration is designed; the key of the test link is analyzed Physical parameters of the relationship between the establishment of a test data processing model, which broadens the test bandwidth and power range, reducing the requirements of the test device. The test results on the actual radio stations show that the theoretical analysis results and the transmitter intermodulation suppression ratio test method proposed in this paper are correct and effective.