Liquid-crystal varactors with fast switching times for microwave applications |
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| Authors: | Goelden F. Gaebler A. Mueller S. Lapanik A. Haase W. Jakoby R. |
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| Affiliation: | Darmstadt Univ. of Technol., Darmstadt; |
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| Abstract: | A varactor using liquid crystal (LC) as tunable dielectric is presented. The two devices described feature LC layer thicknesses of 5 and 1 mum, respectively. A more advanced fabrication scheme is used, which incorporates the use of fused silica as the LC enclosing substrate. The devices exhibit tunabilities of at least 18% and quality factors of at least 40 at 1 GHz. The switching times toff are as low as 4 ms. |
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