Synthesis of inline filters with arbitrarily placed attenuation poles by using nonresonating nodes
Synthesis of inline filters with arbitrarily placed attenuation poles by using nonresonating nodes
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DOI：
10.1109/tmtt.2005.855128
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发表时间：
2005-10
影响因子：
4.3
通讯作者：
Smain Amari;G. Macchiarella
中科院分区：
文献类型：
--
作者：
Smain Amari;G. Macchiarella
本文提出了一种在实频上任意放置衰减极点(传输零点)的伪椭圆线上滤波器的通用直接综合法。AP由耦合到非谐振节点的专用谐振器产生并独立控制。给出了适当确定输入和输出反射系数的相位的简单规则。为了减少舍入误差的影响，特别是对于高阶滤波器，从输入和输出中同时提取网络元素。讨论了解的多解性和标度性质。最后给出了综合算例，验证了该方法的有效性。将理论计算结果与实际测量结果进行了比较，验证了理论的正确性。
A general and direct synthesis technique of pseudoelliptic inline filters with arbitrarily placed attenuation poles (APs) (transmission zeros) at real frequencies is presented. The APs are brought about and independently controlled by dedicated resonators, which are coupled to nonresonating nodes. Simple rules to properly determine the phases of the reflection coefficients at the input and output are given. To reduce the effect of roundoff errors, especially for higher order filters, the extraction of the elements of the network is performed from the input and output simultaneously. Multiplicity and scaling properties of the solutions are discussed. Synthesis examples are presented to demonstrate the soundness of the procedure. Theoretical results are compared with measurement to demonstrate the validity of the presented theory.