Vol. 103

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2022-02-20

Study on the Effect of the Feedline Inductance in Wideband Tunable Band Pass Combline Filters

By Seyed Mostafa Mousavi, Javad Soleiman Meiguni, and David Pommerenke
Progress In Electromagnetics Research Letters, Vol. 103, 25-30, 2022
doi:10.2528/PIERL22011304

Abstract

This letter proposes a novel analysis and design method of a continuously adjustable bandpass combline filter. It investigates the feedline design specifications and introduces an external quality factor (Qext) tuning structure to achieve a constant fractional bandwidth over 60% tuning bandwidth. The design approach allows to determine the optimum feedline structure for the filter andis verified by full-wave simulation and measurement. The results show a constant fractional bandwidth of 4.5% over the entire operating frequency range between 225-400 MHz.

Citation


Seyed Mostafa Mousavi, Javad Soleiman Meiguni, and David Pommerenke, "Study on the Effect of the Feedline Inductance in Wideband Tunable Band Pass Combline Filters," Progress In Electromagnetics Research Letters, Vol. 103, 25-30, 2022.
doi:10.2528/PIERL22011304
http://www.jpier.org/PIERL/pier.php?paper=22011304

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