Automated test and tuning system for microwave filters
Automated test and tuning system for microwave filters
复制标题
微波滤波器自动测试和调谐系统
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. Amari
中科院分区：
文献类型：
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作者：
P. Harscher;R. Vahldieck;S. Amari
介绍了一种微波（腔）体滤波器计算机诊断与自动调谐的新方法。该方法基于等效网络理论，使用修改的滤波器合成方程，包括所有特征滤波器参数，如谐振频率，单个谐振器的损耗，输入/输出耦合和谐振器之间的耦合。代替使用场模拟器来提取滤波器参数和相关联的网络灵敏度，利用测量的S参数数据的更实际和更准确的参数提取过程。因此，自动调谐变成两个步骤的过程。在第一步中，从一系列S参数测量中提取未调谐滤波器的精确参数值以及参数灵敏度。在第二步骤中，在如此校正的模型上使用梯度优化以找到调谐螺钉位置，以给出与从合成获得的相同的参数集。
A novel method for computerized diagnosis and automatic tuning of microwave (cavity) filters is introduced. The method is based on equivalent network theory using modified filter synthesis equations, including all characteristic filter parameters like resonant frequency, losses of individual resonators, input-/output couplings and couplings between resonators. Instead of using field simulators to extract filter parameters and associated network sensitivities, a more practical and more accurate parameter extraction process of measured S-parameter data is utilized. Thus automatic tuning becomes a two step process. In the first step the exact parameter values of an untuned filter as well as parameter sensitivities are extracted from a series of S-parameter measurements. In a second step gradient optimization is used on the so corrected model to find the tuning screw positions to give the same parameter set as obtained from the synthesis.