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Design, construction and testing of aggregates of "microstrip" antennas
Guilherme F. M. da Silva; Carlos A. T. Campos; José Rocha PereiraThis paper describes a first approach on the microstrip antennas design. Several theoretical analysis technics are summarized. The analysis and design of standard rectangular patches is done using the cavity model.Some square and rectangular patches have been designedand measured in order to evaluate their main characteristics.Special attention was paid to the problem of matching thesepatches to ...
Linearization of Power Amplifiers for Active Feedback
José Carlos Pedro; Jorge Perez; José Rocha PereiraThis paper describes the work developed under thePh.D. course of its author [I]. It is devided in four main partswhich refer to the motivation, theoretical background ofamplifier linearization circuits design, GaAs MESFETmodeling, and finally, experimental validation. That wasacheived by the design and test of a MMIC power amplifier,linearized by means of active feedback. ; O trabalho que neste artigo se descr...
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