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

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

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 ([Q.sub.ext]) tuning structure to achieve a constant fractional bandwidth over 60% tuning bandwi...

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Veröffentlicht in:Progress in electromagnetics research. Letters 2022-02, Vol.103, p.1
Hauptverfasser: Mousavi, Seyed M, Meiguni, Javad, Pommerenke, David
Format: Artikel
Sprache:eng
Schlagworte:
Design and construction
Electric filters, Bandpass
Induction, Electromagnetic
Power amplifiers
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Beschreibung
Zusammenfassung: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 ([Q.sub.ext]) 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 and is 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.
ISSN:1937-6480
1937-6480