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Design of Microwave Band Stop and Band Pass Filters Based on BST Thin Film Varactor Technology

Ramadugu, Jaya Chandra
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386695003

Abstract Details

2013, Master of Science (M.S.), University of Dayton, Electrical Engineering.
This thesis presents a design of band stop and band pass filters for microwave applications. These filters are based on coplanar waveguide (CPW) transmission lines on a 500 µm thick sapphire substrate. 0.25 µm thin film barium strontium titanate (BST) thin film is used as the tunable dielectric layer. The design of the band stop filter is based on the traditional varactor shunt switch (designed by Dr. Subramanyam and his team) coupled to the ground using an inductive path. Thus, the design symbolizes a single pole standard band stop filter with the potential for frequency tunability. The capacitive overlap makes the device tunable. Several designs of the band stop filter based on the same concept, but different capacitive overlaps, inductive configurations and overall device dimensions were designed and studied. The center frequency for these designs varied from 1 to 5GHz. The band pass filter is mostly single layered and represents a microstrip based structure although it is CPW fed. It is shunted to the ground with varactors on either side of the device. The idea of having varactors were to achieve tunability. It has 4 resonant iv traps representing a 4-pole filter. The design, simulation results, experimental results and analyses are presented.
Guru Subramanyam (Committee Chair)
Monish Chatterjee (Committee Member)
Weisong Wang (Committee Member)
90 p.
Electrical Engineering
Band stop filter, band pass filter, BST varactor technology, ferroelectrics, dielectrics, quad ring filter

Recommended Citations

Citations

  • Ramadugu, J. C. (2013). Design of Microwave Band Stop and Band Pass Filters Based on BST Thin Film Varactor Technology [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386695003

    APA Style (7th edition)

  • Ramadugu, Jaya. Design of Microwave Band Stop and Band Pass Filters Based on BST Thin Film Varactor Technology . 2013. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386695003.

    MLA Style (8th edition)

  • Ramadugu, Jaya. "Design of Microwave Band Stop and Band Pass Filters Based on BST Thin Film Varactor Technology ." Master's thesis, University of Dayton, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1386695003

    Chicago Manual of Style (17th edition)

dayton1386695003
11,344
© 2013, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.