Metrological characteristics of antenna system for measuring electromagnetic field parameters

Ilnitskiy, L. Ya.; Shcherbyna, Olga; Mykhalchuk, Inna

doi:10.3103/s0735272716030055

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…More complex structural diagrams of antenna systems with extended functionality for radio monitoring stations, as well as analysis of errors in measuring field parameters by these systems, are considered in the works [68][69][70][71].…”

Section: Experimental Results and Discussion Sectionmentioning

confidence: 99%

Prospect for Using Low-Element Adaptive Antenna Systems for Radio Monitoring Stations

Shcherbyna¹,

Zaliskyi²,

Kozhokhina³

et al. 2021

IJCNIS

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This article is devoted to the analysis of prospect to apply multifunctional adaptive antenna systems for radio monitoring stations. The review of publications done demonstrates that current antennas that are developed and used in radio monitoring systems to control and measure the parameters of electromagnetic radiation should be applicable to conduct accurate measurements in wide frequency range under the condition of interferences. The analysis shows that modern adaptive antenna systems are mostly developed for radar and telecommunications applications. In this context we consider possible ways to solve the problem of adapting radio monitoring devices to a complex electromagnetic environment using antenna systems with primary processing of received signals . It was found that the developers of the antennas, which are based on adaptive interference suppression methods, focus basically on the development and implementation of adaptation processes, limiting themselves only to solving electromagnetic compatibility problems. In such approach, the functions of direction finding and measurement of radiation field parameters important exactly for radio monitoring systems are mostly ignored. Therefore, this research area opens up a wide field for identifying new possibilities for constructing multifunctional antenna systems. Focusing on this direction of research, we consider as an example the constraction of a simple two-element adaptive antenna system, which can be used to measure the parameters of the electromagnetic field in radio monitoring systems. The main relations for the error of determining the direction of arrival of the interference signal with a simple two-element antenna are investigated. The influence of the stability of the antenna array parameters and functional units of signal processing onto the errors is estimated.

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Section: Experimental Results and Discussion Sectionmentioning

confidence: 99%

Prospect for Using Low-Element Adaptive Antenna Systems for Radio Monitoring Stations

Shcherbyna¹,

Zaliskyi²,

Kozhokhina³

et al. 2021

IJCNIS

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show abstract

“…Designs of four-element antenna systems with signal processing have been developed for measuring the parameters of the electromagnetic field [17]. An example of calculating the metrological characteristics of this antenna system was also presented, as well as possible measurement errors and their main sources [18]. It should be noted that the measurement errors of the output values were presented as the sum of the components with specific influence coefficients.…”

Section: Review Of the Literaturementioning

confidence: 99%

“…Assume that the radiation of the source b is suppressed. In this case, the polar axis of the spherical coordinate system is parallel to the axes of the vertical ), using expressions (18) and (19), are written in the form (7). That make it possible to obtain a ratio for calculating instrumental errors.…”

Section: Review Of the Literaturementioning

confidence: 99%

Accuracy Characteristics of Radio Monitoring Antennas

Shcherbyna

Ilnitskyi

Mykhalchuk

et al. 2020

RIC

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Context. The constant increase in the number of radio electronic equipment leads to an ever-increasing complication of the electromagnetic environment. That requires constant monitoring to ensure electromagnetic compatibility, as well as the development of high-quality universal antennas for radio monitoring systems. Objective. The goal of the work is construction of a mathematical model of an antenna system for radio monitoring stations and calculation of its main accuracy characteristics. Method. The most important metrological characteristics of a measuring instrument are methodical and instrumental errors, that is, the dependence of these errors on the parameters of structural elements of the signal processing device, which is integrated with the antenna array. Consequently, the mathematical model of the antenna system should take into account not idealized, but real transmission coefficients of the most critical structural components. Besides, to ensure transparent functional relations between the voltages in the mathematical model is necessary to limit the number of variables informative voltages. With this approach, the determination of instrumental errors is greatly simplified, and analytical expressions become more suitable for assessing the influence of structural elements on the accuracy of measuring processes. Results. Analytical relations were obtained that reveal the influence of different elements and circuits of the device on the measurement accuracy of the radiation fields parameters. Conclusions. The present findings confirm that the presented antenna system provides a measurement of the main parameters of the radiation field both in the conditions of a satisfactory electromagnetic environment. Moreover, in the conditions when another frequency of radiation acts at the frequency of the useful signal. The angular resolution, that is, the ability to separate signals with an insignificant angular spacing of signal sources and interference, depends not only on the directivity characteristics of the antenna array but also on the accuracy of establishing the distances between the phase centres of real and virtual vibrators. The operating frequency range of the antenna array is limited not only by the deformation of the radiation pattern as well by the errors in the design of the antenna structural elements.

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