A method for the sensitivity improvement of radio astronomy receivers

Gupta, Jagrati; Aitken, George J. M.

doi:10.1080/00207217508920512

Cited by 1 publication

(2 citation statements)

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“…This is due to energy interchange between the controlling signal and input signal. Works [3,4] did not reveal the active character of long line with changing parameters. Authors of [3] suggested dividing the continuous signal into separate parts and passing them through the long line, thus compressing each part of the signal, so that the signal parts will be separated at the output of the long line.…”

Section: Finding the Output Signal In The Long Line Without Lossesmentioning

confidence: 98%

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Distributed parametric effect in long lines and its applications

Shestopaloff

2011

International Journal of Electronics

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The article considers a parametric effect which takes place when the velocity of signal propagation in a long line changes. We found the analytical solution describing the form of the transformed signal for a line with losses, when line parameters change symmetrically. We also considered lines without losses, with asymmetrical change of parameters. Our theoretical results comply with experimental data. In certain conditions, such a line can be used as an amplifier. The parametric effect in optics is described by Maxwell's equations, while in case of a long line, the analysis is based on telegrapher's equations. However, it turns out that in the end, both in optics and electronics, the parametric effect is described by wave equations that are mathematically similar. This is because fundamentally, the parametric effect is physically based on energy interchange between the controlling (pump) signal and the transformed one, when the parameters of the propagating medium change. So, the obtained results can be used for analysis of parametric effects in optics and electronics.

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Section: Finding the Output Signal In The Long Line Without Lossesmentioning

confidence: 98%

“…This effect was noticed a long time ago. One of the earliest applications of this effect is described in [3]. In this work, the authors suggest to divide a continuous signal into impulses that are passed through a long line with increasing propagation velocity.…”

Section: Introductionmentioning

confidence: 99%

Distributed parametric effect in long lines and its applications

Shestopaloff

2011

International Journal of Electronics

View full text Add to dashboard Cite

show abstract

A method for the sensitivity improvement of radio astronomy receivers

Cited by 1 publication

References 2 publications

Distributed parametric effect in long lines and its applications

Distributed parametric effect in long lines and its applications

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