Velázquez Ahumada, María del CastilloMartel Villagrán, JesúsMedina Mena, Francisco2020-06-122020-06-122007Velázquez Ahumada, M.d.C., Martel Villagrán, J. y Medina Mena, F. (2007). Design of compact low-pass elliptic filters using double-sided MIC technology. IEEE Transactions on Microwave Theory and Techniques, 55 (1), 121-127.0018-94801557-9670https://hdl.handle.net/11441/97750A novel implementation of stepped-impedance low-pass elliptic filters is presented in this paper. The filters are based on the well-known technique of cascading high- and low-impedance sections to simulate the ladder LC lumped-circuit prototype. We propose in this study a new approach to build up the constitutive circuit elements by taking advantage of the use of both sides of the substrate. The use of double-sided technology yields both design flexibility and good circuit performance. High-impedance sections are achieved by using slots in the backside of the substrate, whereas low-impedance sections are obtained with parallel-plate capacitors. In order to achieve the transmission poles corresponding to the elliptic design, these capacitors are series connected to the ground plane by means of high-impedance coplanar-waveguide lines, which mainly act as inductors. As a final step, meandering techniques have been applied to the high-impedance sections of the filter to reduce the overall circuit size. The measurement of several fabricated filters shows fairly good agreement between theory and experiment.application/pdf7 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Double-sided microwave integrated circuit (MIC)Elliptic responseLow-pass filters (LPFs)Stepped-impedance (SI) filtersinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1109/TMTT.2006.888578