B.B. Nikolenko1, A.E. Latyshev2

1, JSC “CNIRTI named after academician A.I. Berg” (Moscow, Russia)

1,2 post@cnirti.ru

Problem statement. The requirements for the system for determining radio sources involve increasing the effectiveness of radio intelligence in the tactical and operational level of the ground forces by detecting and determining the direction of the enemy's radio source. In this regard, the use of digital twin technology to implement a multi-position direction finder based on an unmanned aerial vehicle to detect enemy radio sources is an urgent task.

Goal. To carry out mathematical modeling of a multi-position direction finder in conditions of use in the on-board equipment of an unmanned aerial vehicle and analyze the results obtained.

Result. The results of the implementation of the technology of digital twins of a multi-position direction finder are presented. Mathematical modeling of a direction finder operating in the range of 1...7 GHz using the phase method is carried out. The antenna system of the direction finder is calculated, consisting of four antenna elements with a minimum distance of 49 mm between them. It is shown that this distance provides the smallest number of uncertainty hypotheses at the maximum frequency of the operating range and the maximum distance between the antenna elements required for a given accuracy at the minimum frequency of the operating range. It has been established that the combined use of the combined phase and quasi-difference rangefinder method makes it possible to increase the accuracy of determining the location of radio sources. The possibility of using one unmanned aerial vehicle to the developed system has been confirmed to ensure the accuracy requirements for determining radio sources up to 300 m in the frequency ranges L, 5 and C, where the accuracy of the coordinates of radio sources is determined by the quasi-difference rangefinder method, and the phase method is used to eliminate ambiguity.

Practical significance. The presented combined phase and quasi-difference rangefinder method can be used in the on-board equipment of an unmanned aerial vehicle.

Nikolenko B.B., Latyshev A.E. Simulation of a multi-position phase direction finder based on an unmanned aerial vehicle. Radiotekh-nika. 2025. V. 89. № 5. P. 113−118. DOI: https://doi.org/10.18127/j00338486-202505-12 (In Russian)

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