I.O. Porokhov1, V.P. Popov2, A.A. Kondratyev3, I.A. Kozlov4, R.R. Alimirzoev5,  V.Yu. Leushin6, S.V. Agasieva7, A.Yu. Antonenkova8

1–5 JSC «Central radio-research institute named after academician A.I. Berg» (Moscow, Russia)

1,3,6–8 Peoples' Friendship University of Russia (Moscow, Russia)

In radio monitoring, there are problems of identifying and studying the parameters of sources of electromagnetic radiation in a wide frequency band. This is important, in particular, for determining the required degree of noise immunity of applicator antennas used in medical radiothermographs and the possibility of using these highly sensitive devices outside shielded chambers. The overlap ratio for the received frequency range for antenna devices can be up to a hundred or more times. Dimensions of antenna devices, especially in the region of meter waves, may have dimensions that make them difficult to use, for example, when conducting radio monitoring indoors or when placing antennas on moving objects. Therefore, the issue of reducing the dimensions of antennas used to monitor sources of electromagnetic radiation in a wide frequency band is an urgent task.

Task is to develop and conduct experimental studies of the characteristics of a small-sized broadband active antenna with vertical polarization, designed to provide radio monitoring of radio emission sources in the meter and decimeter wavelength ranges.

A variant of the construction of a small-sized broadband receiving active antenna is presented. The experimental results of measuring the gain of an active antenna based on a cone asymmetric monopole are presented.

The presented active antenna can be used as part of a mobile or stationary radio monitoring complex, in particular, to assess interference levels in the operating ranges of medical radiothermographs, which will make it possible to determine the requirements for noise immunity of applicator antennas.

Porokhov I.O., Popov V.P., Kondratyev A.A., Kozlov I.A., Alimirzoev R.R., Leushin V.Yu., Agasieva S.V., Antonenkova A.Yu. Broadband active antenna for monitoring electromagnetic radiation sources. Nanotechnology: the development, application – XXI Century. 2022. V. 14. № 3. Р. 14−21. DOI: https://doi.org/10.18127/j22250980-202203-02 (In Russian)

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