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Two different devices topology are proposed to implement parallel-plate capacitors using Ba0.6Sr0.4TiO3 (BST) thin films. At 1 MHz frequency, the maximum tunability 1.3:1 is obtained with 32 V DC bias. The new topology capacitors have much higher tunability compared with conventional capacitors at the same total capacitance. Phase shifters, which are loaded variable structure capacitors have also...
A modified structure of a distributed ferroelectric phase shifter is presented, which is obtained by periodically inserting slots into the ground of a conventional distributed phase shifter. The principle is explained and electromagnetic simulation results are reported. It produces higher phase shift and, at the same time, matches port impedance better without reducing the width of the centre strip...
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