| Abstract: | The last few decades saw considerable progress in the methods of reception of radio signals, in particular, in the short-wave part of millimeter wave range. Along with this, or, perhaps, owing to this, some views, concepts, and definitions in the theory of detection and mixing were changed. Consequently, for example, the concepts and the corresponding apparatus developed in the 1950s need at present certain corrections. Below we propose a nonstandard consideration of the detection and mixing processes on the basis of consistent observance of the principle of information theory on the energy character of signal reception and using the time-domain approach when describing the operation of superheterodyne converters. To my teacher in practical radiophysics, professor Izrail’ Lazarevich Bershtein with gratitude. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 41, No. 11, pp. 1378–1398, November, 1998. |
