How does the operating bandwidth of non-foster negative capacitor affect its stability properties?
Source abstract
Abstract
The comparative analysis of the stability properties of three generic types of negative non-Foster capacitors (ideal non-dispersive type, low-pass type, and band-pass type) is presented. It is shown that the range of external RC loads that ensure stable operation for a band-pass negative capacitor significantly exceeds the ranges required for both a low-pass negative capacitor and an ideal dispersionless negative capacitor. Furthermore, the rigorous inequality is derived, which connects the operating bandwidth and a range of permissible external loads, thus enabling a straightforward design of practical stable non-Foster systems. Finally, the RF hardware demonstrator (100 kHz–100 MHz) of the band-pass negative capacitor was fabricated, and all measurement results were found to be in very good agreement with the theoretical predictions.
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Research context
OpenAlex topics: Acoustic Wave Resonator Technologies · Ferroelectric and Piezoelectric Materials · Radio Frequency Integrated Circuit Design
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Affiliations
Faculty of Electrical Engineering and Computing, University of Zagreb , Unska 3, Zagreb HR 10000, Croatia
Funding
Hrvatska Zaklada Za Znanost · European Office of Aerospace Research and Development
References (23)
Show source-provided references
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