一种新型数字式微波宽带噪声发生器的仿真和实现

The Simulation and Realization of a New Kind of Digital Broad Band Microwave Noise Generator

该文提出了微波压控振荡器的一种建模形式,以此为基础对一种采用数字信号处理和微波模拟信号调制相结合的新型微波宽带噪声发生器进行了建模仿真。该微波宽带噪声发生器中心频率在8~18GHz内任意可变,带宽在30MHz^300MHz内任意可调。仿真和实测结果进行了对比,分析了若干重要参数的一致性和不相符的原因,结果验证了该噪声发生器的性能和建模仿真的有效性。

This paper presents a new modeling method of microwave VCO（ Voltage Control Oscillator）. Based on this model a novel board bandwidth microwave noise generator, which is composed of a digital algorithm part and an analog modulation part, is simulated. This noise generator features broad adjustable bandwidth（ from 30MHz to 300MHz） and wide central frequency range（ from 8GHz to 18GHz）. The comparison of simulative with experimental results of the generator is give. And the causes of agreements and disagreements are also analyzed. The accordance between simulative and experimental results, such as 3dB band-width and in-band flattness, indicates the validity of the presented modeling method.