Şengül, Metin Y.Çakmak, Gökhan2020-12-132020-12-13201951549-77471558-37911549-77471558-3791https://hdl.handle.net/20.500.12469/3546https://doi.org/10.1109/TCSII.2018.2880262In this brief, the analysis of mixed-element structures formed with shunt capacitors separated by commensurate transmission lines is performed first time in the literature. First, a low-pass lumped-element ladder network is considered. Then the series inductors are replaced with commensurate transmission lines. As a result, a practically important mixed-element structure is obtained. Then the description of the structure by means of two frequency variables (one for shunt capacitors and one for transmission lines) is detailed: Explicit expressions for the coefficients of the descriptive two-variable polynomials in terms of the coefficients of the single variable boundary polynomials are derived for various numbers of elements, which are obtained first time in the literature. Finally, a mixed-element broadband matching network is designed to illustrate the usage of the obtained expressions. If it is preferred not to have shunt capacitors, they can be replaced with open-ended stubs via Richard's transformation. So the resultant circuit is extremely suitable for microstrip fabrication.eninfo:eu-repo/semantics/embargoedAccessMatchingMixed element networksShunt capacitorsTransmission linesArticle13311335866WOS:00047894960001010.1109/TCSII.2018.28802622-s2.0-85056307673Q2Q1