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Analysis of low pass filter using nonhomogeneous transmission lines

Transmission lines are an important component in electrical engineering, which can be used to guide energy as well as information. Nonhomogeneous transmission lines, which have position varying quantities, can be used to design matching circuit, delay equalizer, filters VLSI interconnections, etc. In analysis of nonhomogeneous transmission lines, an approach based on method of moment is used. As a basis function, a constant function is used and as weighting function we used a delta function or collocation. In this work, we observed several cases such as lossless and lossy homogeneous transmission lines with matching and arbitrary load. These cases verified the algorithm developed in this work. The second example concerned with nonhomogeneous transmission lines, whose results conformed with those given in the literature. The last example consists of nonhomogeneous transmission lines in form of abruptly changing transmission lines. This structure is used to design a low pass filter. The calculated reflection and transmission factor show almost the same results as given with a commercial available software.