On the Trade-Off Between Quality Factor and Tuning Ratio in Tunable High-Frequency Capacitors


Tiggelman, M.P.J. and Reimann, K. and Van Rijs, F. and Schmitz, J. and Hueting, R.J.E. (2009) On the Trade-Off Between Quality Factor and Tuning Ratio in Tunable High-Frequency Capacitors. IEEE Transactions on Electron Devices, 56 (9). pp. 2128-2136. ISSN 0018-9383

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Abstract:A benchmark of tunable and switchable devices at microwave frequencies is presented on the basis of physical limitations to show their potential for reconfigurable cellular applications. Performance limitations are outlined for each given technology focusing on the quality factor (Q) and tuning ratio (eta) as figures of merit. The state of the art in terms of these figures of merit of several tunable and switchable technologies is visualized and discussed. If the performance of these criteria is not met, the application will not be feasible. The quality factor can typically be traded off for tuning ratio. The benchmark of tunable capacitor technologies shows that transistor-switched capacitors, varactor diodes, and ferroelectric varactors perform well at 2 GHz for tuning ratios below 3, with an advantage for GaAs varactor diodes. Planar microelectromechanical capacitive switches have the potential to outperform all other technologies at tuning ratios higher than 8. Capacitors based on tunable dielectrics have the highest miniaturization potential, whereas semiconductor devices benefit from the existing manufacturing infrastructure.
Item Type:Article
Copyright:© 2009 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/67409
Official URL:https://doi.org/10.1109/TED.2009.2026391
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