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Experimental Investigation of New Inductor Topologies

Wang, Shu
http://orcid.org/0000-0002-8863-5275
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460733373

Abstract Details

2016, Doctor of Philosophy (Ph.D.), University of Dayton, Electrical Engineering.
Inductors have been investigated and used extensively in analog circuits and digital circuits over 200 years. This dissertation presents a 3D inductor which can efficiently work with a high Q variable capacitor (varactor), and two types of tunable inductors using vanadium dioxide (VO2) as phase control material. There are three different 3D inductor models that are designed and verified using electromagnetic simulation tools, and applied in a resonator with a voltage tunable ferroelectric thin-film barium strontium titanate (BST) varactor. The resonator combining the 3D inductors and BST thin film varactor is verified for the first time. Two types of tunable inductors are designed using VO2 thin films which exhibit metal-to-insulator (MIT) phase transition characteristics above a transition temperature. A VO2-based integrated actuator, which has two-way displacements, is designed and used in the first tunable inductor design. The integrated actuator moves a Nickel layer, which has a high permeability (~100), over a planar coil inductor to tune the overall inductance. Simulation results show a 27% tuning range through applied displacement variation in the simulator. The second tunable inductor design uses a VO2 thin films as series switches in the devices. One configuration uses a short VO2 bar as a circuit switch and the other uses VO2 to replace the full spiral coil inductor. The total inductance of the circuit tunes when the VO2 changes from insulating to conducting phase above the transition temperature. The experimental results show 32% inductance variation through applied temperature variation (25°C - 100°C) in the devices. The simplified fabrication process of the second tunable inductor exhibits potential for portable and adaptive communication systems. Two configurations of multi-tap inductors are also designed such that the inductance of the device changes when the probe is moved between the output ports. A strong match between the VO2 based devices and the Au based devices reveal that we are able to produce high quality VO2 thin films. The VO2 thin film has never been utilized in electrical application such as inductors before this research.
Guru Subramanyam, Ph.D (Committee Chair)
Monish Chatterjee, Ph.D (Committee Member)
Robert Penno, Ph.D (Committee Member)
Andrew Sarangan, Ph.D (Committee Member)
117 p.
Electrical Engineering
3D inductor, resonator, barium strontium titanate, tunable inductor, vanadium dioxide

Recommended Citations

Citations

  • Wang, S. (2016). Experimental Investigation of New Inductor Topologies [Doctoral dissertation, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460733373

    APA Style (7th edition)

  • Wang, Shu. Experimental Investigation of New Inductor Topologies. 2016. University of Dayton, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460733373.

    MLA Style (8th edition)

  • Wang, Shu. " Experimental Investigation of New Inductor Topologies." Doctoral dissertation, University of Dayton, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460733373

    Chicago Manual of Style (17th edition)

dayton1460733373
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© 2016, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.