Port Design
Mostrando 25-28 de 28 artigos, teses e dissertações.
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25. Sistema de medição de impedancias complexas utilizando dispositivo de seis portas
This work presents the design and implementation of a system that allows the measurement of complex impedances using a six-port network at microwave frequencies. The six-port device used was a "sampled line" microstrip. The basic theory is presented initially, followed by an outline of the hardware and software developed to interconnect the six-port with a P
Publicado em: 1990
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26. Amplificadores de baixo ruido em microondas
The theoretical part of this work deals with parameters that, direct or indirectly, are related with the design of microwave amplifiers. The study considered the S-parameters for 2-port devices (and their stability criteria) and also the noise characterization, since the main objective of this work was the minimization of noise in microwave amplifiers. Later
Publicado em: 1982
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27. Estudo de amplificadores usando transistores bipolares em microondas
The purpose of this study is to present the basic concepts for designing microwave bipolar transistor amplifiers. In this work the transistor is considered to be a two-port device characterized by the scattering parameters. These scattering (S) parameters are measured for specific bias conditions over the desired frequency range (1 to 2 GHz). The rules for t
Publicado em: 1978
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28. Electronic Data Processing System for the Clinical Microbiology Laboratory1
Owing to the increased volume of laboratory services and the shortage of skilled medical microbiologists who presently spend up to 30% of their time in clerical matters, pragmatic applications of electronic sorting techniques and computers should be considered to alleviate this problem. Moreover, surveillance of the hospital community, with particular refere