Thesis (M.S.)--Rochester Institute of Technology, 2006. / Typescript. Includes bibliographical references (leaves 72-79).

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[pt] Neste trabalho é feita uma análise das características de transmissão de estruturas microstrip blindadas e contendo várias camadas de dielétrico. O problema é formulado em termos de uma representação rigorosa de modos híbridos, superposição de modos TE e TM. A equação característica para as propriedades de dispersão dessas linhas é obtida pela aplicação da técnica da matriz de transferência da estrutura em associação com o método de Galerkin no domínio espectral. As principais vantagens do método são sua simplicidade e convergência rápida, permitindo a caracterização dos modos fundamental e de ordem superior. São apresentados resultados teóricos e práticos para linhas isoladas acopladas e ressoadores lineares, comparando-se com outros autores. Os efeitos de metalização, perdas e descontinuidades são também considerados. / [en] A hybrid mode analysis is presented for a multilayer dielectric within a rectangular conducting box. An arbitrary set of planar conductors may be distributed along one of the surfaces. The problem is formulated in terms of a rigorous hybrid-mode representation, superposition of TE and TM fields. The analysis combines a transfer-matrix approach with Galerkin´s method in the spectral domain to give a characteristic equation for the dispersion properties of the lines. Among the advantages of the method are its simplicity and rapid convergence, allowing a characterization of the fundamental and higher order modes. Theoretical and practical results are presented, for single/coupled lines and linear resonators, and they are compared with the results presented by other authors. The effects due to metallization, loss and discontinuities are also considered.

No / A novel conical beam patch antenna design, suitable for local area network applications, uses a central cylindrical connection from the disc to ground to achieve a large reduction in resonant size. Results on efficiency, bandwidth, and pattern are reported for several prototypes.

International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / The available space for the mounting of antennas on missiles and airborne targets is very limited. The vehicle integrator is constantly striving for smaller antenna apertures while requiring increased performance. Microstrip antennas with moderate dielectric loading have been successfully utilized in the past to meet these requirements. With the advent of high dielectric substrate materials, the designer now has the option of further reducing the size of the antenna while preserving the most desirable performance attributes. An example of the size reduction achievable with the new substrate materials is presented along with performance characteristics.

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