Coplanar microstrip structures placed on dielectric substrates
are used as high frequency electro-optic modulators. The method of
lines, a mathematical technique for solving partial differential
equations, has been applied to solve for the propagation
characteristics of such a configuration.
It has been determined that simple transmission line models
are adequate to describe this system. The propagation
characteristics are expressed in terms of the equivalent impedance
and the phase velocity of the signal on the microstrip. In order to
maximize the effective bandwidth of the modulator, the impedance is
matched to that of the surrounding dielectric substrate, and the
difference in the phase velocities of the two signals is minimized.
The numerical technique developed here allows for the analysis
of inhomogeneous dielectric substrates, so that trench structures for
tuning the propagation characteristics to their desired values can be
modelled.
The numerical results for typical structures are presented, and
suggest that the method of lines is a viable one for analyzing these
modulator structures. / Graduation date: 1991
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/37685 |
| Date | 07 September 1990 |
| Creators | Myers, Robert A. (Robert Allan), 1962- |
| Contributors | Tripathi, Vijai K. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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