2026-09-18T19:48:27Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/179952022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Jin Au Kong.
Wang, Weijen, 1980-
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2005-06-02T19:33:09Z
2005-06-02T19:33:09Z
2004
2004
http://hdl.handle.net/1721.1/17995
57195949
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (p. 83-86).
Using a commercially available software(CST Microwave Studio®), two kinds of simulations have been carried out on different metamaterials in the microwave regime. One is transmission and reflection of a unit cell in a waveguide, and the other is parallel plate slab farfield radiation. The S-parameters are obtained from the wave-guide simulation and are used to retrieve the effective permittivity and permeability with which we can estimate the farfield radiation using analytic method. Thus, by comparing the farfield radiation from two different methods, analytic and slab simulation, we find that the analytic method is able to indicate many major features of the slab simulation's farfield results, implying that within a certain frequency range, we can treat the metamaterial as being homogeneous. After comparing the radiation performance of different metamaterial as antenna substrates, a structure is chosen to be optimized in such a way that it improves in radiation power, beamwidth, and bandwidth.
by Weijen Wang.
M.Eng.
86 p.
3543689 bytes
3553248 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Directive antenna using metamaterial substrates
Thesis
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