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Bull's-Eye Structure with a Sub-Wavelength Circular Aperture

Zarepoor, Masoud
http://rave.ohiolink.edu/etdc/view?acc_num=wright1373805221

Abstract Details

, Master of Science in Engineering (MSEgr), Wright State University, Mechanical Engineering.
This research focuses on improving the spatial resolution of terahertz (THz) imaging. Using a sub-wavelength aperture in a metal ground plane is the most common way to improve the spatial resolution, but a sub-wavelength aperture has low radiation transmission. To increase the radiation transmission of a sub-wavelength aperture, periodic circular grooves were put in the metal around the aperture. The sub-wavelength circular aperture and the periodic circular grooves around it are known as the bull's-eye structure. The bull's-eye structure shows high radiation transmission at its design frequency, and it also has sub-wavelength spatial resolution. This research designed the bull's-eye structure to perform at ~3 mm wavelength in W band (75-110 GHz). Simulations were conducted on the 3D model of the bull's-eye structure to study its performance in the desired frequency range. Then a bull's-eye structure was fabricated and tested by the knife-edge technique to measure its spatial resolution. The knife-edge test results show the obtained sub-wavelength spatial resolution of the fabricated bull's-eye structure. This research also includes the designs of a 500 GHz bull's-eye structure and 100 GHz reflective probe.
Joseph Slater, Ph.D., P.E. (Advisor)
Elliott Brown, Ph.D. (Committee Member)
Henry Young, Ph.D. (Committee Member)
72 p.
Mechanical Engineering

Recommended Citations

Citations

  • Zarepoor, M. (2013). Bull's-Eye Structure with a Sub-Wavelength Circular Aperture [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1373805221

    APA Style (7th edition)

  • Zarepoor, Masoud. Bull's-Eye Structure with a Sub-Wavelength Circular Aperture. 2013. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1373805221.

    MLA Style (8th edition)

  • Zarepoor, Masoud. "Bull's-Eye Structure with a Sub-Wavelength Circular Aperture." Master's thesis, Wright State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1373805221

    Chicago Manual of Style (17th edition)

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© 2013, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.