Journal of Radio Electronics. eISSN 1684-1719. 2026. ¹5
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2026.5.2
METHOD FOR SUPPRESSION OF PARASITIC RECEPTION CHANNEL
IN FREQUENCY CONVERSION DEVICES
V.V. Skulditsky, S.V. Melnikov, D.G. Yudin
All-Russian Scientific Research Institute «Gradient»,
344000, Russia, Rostov-on-Don, Sokolova Avenue, 96
The paper was received April 16, 2026.
Abstract. This article examines the spectral purity of a frequency converter's output signal. It is shown that, with an insignificant frequency separation of the input and output ranges, one of the harmonics of the input signal falls into the band of the useful signal, the suppression level of which is insufficient to ensure the required dynamic range. A mathematical justification for the occurrence of a parasitic response is given. Two approaches to solving the problem are analyzed, one of which involves shifting the output range to a higher frequency. As an alternative, a method for switching between two fixed output ranges using a combined bandpass filter is proposed. Useful practical recommendations and an illustrative example are provided.
Key words: frequency converter, parasitic channel, harmonic suppression, frequency mixer, combination interference.
Corresponding author: Vladislav Valerievich Skulditsky vladislavskulditsky@yandex.ru
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For citation:
Skulditsky V.V., Melnikov S.V., Yudin D.G. Method for suppression of parasitic reception channel in frequency conversion devices. // Journal of Radio Electronics. – 2026. – ¹. 5. https://doi.org/10.30898/1684-1719.2026.5.2 (In Russian)