Novel MMIC architectures for tunable microwave wideband active filters

• Main Authors: Bergeras, F., Dueme, P., Plaze, J., Darcel, L., Jarry, B., Campovecchio, M.
• Format: Conference Proceeding
• Language: English
• Subjects: Active filters; Band pass filters; Frequency synthesizers; Gallium arsenide; Microwave filters; Microwave technology; MMICs; Resonator filters; Tuning; Wideband
• ISSN: 0149-645X; 2576-7216
• DOI: 10.1109/MWSYM.2010.5516316

"Summary form only given, as follows." This paper reports on two novel architectures for designing tunable microwave active bandpass filters in MMIC technology. The 1st MMIC concerns a frequency-tunable active bandpass filter based on the principle of "actively-coupled passive resonators". Starting from a specific synthesis method developed for fixed-frequency high-order filters, the frequency tuning ability is now performed by the use of varactor-diodes. This new feature is illustrated by the design of a tunable 3-pole active bandpass filter centered at 12 GHz on GaAs. The 2nd MMIC implements a frequency-selective wideband active bandpass filter with the ability to select the required band. This feature is achieved by the use of a channelized configuration. To demonstrate this ability, a GaAs chip has been designed using 3 active filtering channels, embedded in a distributed topology to perform a 3-pole bandpass response in the [9-15] GHz range.