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Content Provider | IEEE Xplore Digital Library |
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Author | De Paolis, R. Coccetti, F. Payan, S. Rousseau, A. Maglione, M. Guegan, G. |
Copyright Year | 2013 |
Description | Author affiliation: LAAS, Toulouse, France (De Paolis, R.; Coccetti, F.) || ICMCB, Univ. de Bordeaux, Pessac, France (Payan, S.; Rousseau, A.; Maglione, M.) || STMicroelectron., Tours, France (Guegan, G.) |
Abstract | A microwave characterization of $(Ba,Sr)TiO_{3}$ (BST) thin films of different thickness has been carried out by means of a fully comprehensive equivalent circuit applied to experimental data of test capacitors. The voltage-dependent material properties (permittivity, loss tangent, and tunability) have been extracted and used in the development of a specific integrated MIM capacitor that, after a first fabrication test, shows a measured tunability of 72% under 0-15 V bias. This varactor has been exploited in the design of a novel tunable filter implemented by using lumped elements coupled resonators, thus allowing a compact size with respect to conventional λ/4 resonator lines. The analysis of some preliminary experimental results shows a tuning of 88% (657 MHz-1235 MHz) of the filter center frequency and an almost constant fractional bandwidth of 30% upon the application of a 0-15 V bias. The insertion loss is between 3.2 and 5.8 dB, and the return loss is better than 9 dB. |
Starting Page | 1431 |
Ending Page | 1434 |
File Size | 673340 |
Page Count | 4 |
File Format | |
ISBN | 9782874870316 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2013-10-06 |
Publisher Place | Germany |
Access Restriction | Subscribed |
Rights Holder | European Microwave Association |
Subject Keyword | Microwave filters Resonator filters Band-pass filters Microwave circuits Equivalent circuits Permittivity MIM capacitors tunable filters ferroelectric materials permittivity varactor equivalent circuit |
Content Type | Text |
Resource Type | Article |
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