Some Diffrences among HiFi, Tuned Amplifirs and Oscillators
In our opinion, employing the same set of solutions to the Maxwells equations for representing both oscillations and signals, deserves a disambiguation. In radio communications, indeed, the distinction between received signal and carrier wave is paramount. At microwaves, and for resonating cavities in particular, classical electromagnetism concepts can be applied. However, that distinction is not acknowledged when treating the MASER, which is considered an oscillator as well as a tuned amplifier. In accordance with this a MASER emission is required to be as steady as a carrier, while still supplying information about the internal structure of the active material. In order to explain the latter fact, then, it is common practice to resort to quantal principles that are totally extraneous to electromagnetism. In this article we propose to consider the MASER emission in its entirety to be a saturation effect, in an attempt to show how classical theory can in principle explain those observed facts, provided that steady oscillations are distinguished from signals.
S.L.Vesely A.A.Vesely
I.T.B.,C.N.R.,Italy via L.Anelli 13,Milano 20122,Italy
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-5
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）