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Microwave primary noise sources are always constructed with Planck's law. In microwave frequency region a matched load keeping in a stable temperature radiates noise power whose density is proportional to its physical temperature. The evaluation method of the primary noise source accounted for the distributed loss and temperature was presented by Stelzried in 1965. In this paper an extension evaluation...
Two methods are presented for calibrating broadband highly mismatched noise sources. The first is a reformulation and an extension of the procedure used for very accurately calibrating matched noise sources. It uses isolators and works whatever the source reflection factor. With the second method, the excess noise ratio of the noise source is numerically optimized until the measured reverse noise...
The article describes the basic study of broadband noise signal application in the investigation of materials. The aim is to find a metrology method utilizable for the research on metamaterials in the frequency range of about 100 MHz to 10 GHz. The instrumental equipment and other requirements are presented. This article provides an overview of the current potentialities in the described field and...
We aim to investigate biological function of emotional bodily movements while building a robot in the sense of survival. In this particular paper, we build a novel active vision system which detects weak signals by generating tremor actively. Proposed active vision system consists of a noise generator and a neural system. As a noise generator, we use motors with a decentered weight. And as a neural...
When measuring the transfer and properties of many electronic circuits it is necessary to use a measuring signal with noise of defined properties. In the paper, the design and software implementation are described of a generator of pseudorandom binary noise signal of adjustable length and with repetition of pseudorandom binary signal sequence. The parameters of noise outputs are stable, well defined...
Noise generation is used in several application domains, and each one of them has its own requirements for the statistical properties of the noise signal. This paper presents an approach that allows flexible noise generation based on reconfigurable logic. Such approach uses transfonnation functions implemented as look-up tables in order to allow the transformation of uniformly distributed noise into...
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