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A novel miniaturized and reconfigurable coplanar waveguide (CPW) square-ring slot antenna is presented in this paper. The miniaturization is achieved via a hybrid approach including ferroelectric varactor loadings, high dielectric constant materials, and tuning stub for impedance matching. For the first time, nine shunt ferroelectric (FE) BST thin...
This paper reports the effects of embedding the bottom metal of a thin-film ferroelectric varactor into the wafer substrate. By embedding the bottom metal to a height flush with the surrounding dielectric, a smooth surface remains for the ferroelectric and top metal layers. This parallel stack of layers reduces the coupling between the two metal layers and the resulting capacitance. The design of...
Ferroelectric (FE) Barium Strontium Titanate (Ba(1−x)SrxTiO3, BST) thin film varactor technology is applied to the antenna miniaturization and reconfiguration successfully. CPW square-ring slot antenna is used as a design example, and antennas with and without integrated BST varactors were fabricated and characterized. Including the total ground, the size of miniaturized antenna is 0.12λ0×0.12λ0 which...
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