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A Varactor Tunable Complex Impedance Transformer

Abstract : We have conceived and realized a microwave tunable transformer. The tunability is obtained by loading a transmission line by reverse biased Schottky diodes acting as voltage variable capacitances. Only two diodes pairs are necessary to obtain impedance tunability between 5 Ω to 300 Ω, with an operating frequency varying of more than ± 10 %. Complex loads can also be matched with a wide covering of the Smith chart, but small bandwidth of about 2 %. The device length is around a third of the guided wavelength.
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https://hal.archives-ouvertes.fr/hal-01816043
Contributor : Anne-Laure Perrier <>
Submitted on : Tuesday, June 19, 2018 - 12:05:41 PM
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A.-L Perrier, Philippe Ferrari, J.-M Duchamp, D Vincent. A Varactor Tunable Complex Impedance Transformer. European Microwave Conference, Oct 2004, Amsterdam, Netherlands. ⟨hal-01816043⟩

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