Abstract
A ferroelectric metal insulator metal (MIM) varactor structure incorporating a floating metal and coplanar waveguide (CPW) has been introduced here. The work of the proposed varactor is based on the field-dependent material properties of (Ba, Sr) TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (BST) thin film. A capacitance tunability of 44% has been achieved for the bias voltage of 0–10 V over a frequency range of 1–3 GHz. The proposed varactor structure yields a compact area, high capacitance density, and reduced mask process (two masks).
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