Abstract
This paper presents the design of a compact, composite, low-pass filter circuit into micro strip line form using a new, transforming method. The composite, low-pass filter operating in the UHF range were designed and implemented on an FR4 substrate. The circuits were simulated and developed using Advanced Design Software (ADS) for both lumped element and micro strip filters. A correction factor was considered due to fringing inductance and capacitance. The ADS simulation results showed that the response of the micro strip line circuit of the composite, low-pass filter with fringing correction factor was well agreement with its lumped circuit. This showed that the new transforming method enabled to the lumped element circuit into a micro strip line to solve the complex design of composite filters.
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