【作者】 韩应宾； 赵永久；

【Author】 HAN Ying-Bin,ZHAO Yong-Jiu (School of Mechanoelectronic Engineering,Xidian University,Xi’an 710071)

【机构】 西安电子科技大学机电工程学院；

【摘要】 本文介绍了一种根据实测响应对微波滤波器进行诊断的有理模型构建方法,并利用广义切比雪夫滤波器传输函数和反射函数分子多项式系数间的关系,对现有方法做了进一步改进。由得到的有理模型求出对应的耦合矩阵,并与理论综合结果比较,从而确定滤波器调试的方向和幅度。最后用该方法对一个四阶开环微带滤波器进行诊断调试,得到了较理想的结果,验证了该方法的正确性和有效性。该方法可应用到微波滤波器的计算机辅助调试中。更多还原

【Abstract】 A method to generate a rational model from measured response is presented,which could be employed in diagnosis of microwave filters.A modified method for a general Chebyshev filter is proposed in the paper utilizing the relationship among coefficients of the numerator polynomials in transfer and reflection function respectively.From the generated rational model, coupling matrix of the filter could be evaluated.Thus the tuning direction and magnitude of corresponding physical structure could be decided by comparison with designed coupling matrix.Finally a process of diagnosing and tuning a four-order microstrip square open-loop filter is demonstrated with the aid of the modified diagnosis method,and the response of the filter tuned is fine,Thus the modified method is fully verified by experiment.This method can find application in computer-aided tuning procedures for microwave filters.更多还原