V. A. Balagurovskij – Head of Special Design Bureau, PJSC “NPO “Almaz” (Moscow)

А. О. Manichev – Ph.D. (Eng.), Deputy Head of Research Department, PJSC “NPO “Almaz” (Moscow) E-mail: alex_manichev@inbox.ru

A. N. Tyuvaev – Head of Department, PJSC “NPO “Almaz” (Moscow)

E-mail: Okean87@mail.ru

Ya. L. Petrov – Engineer of 3rd cat., PJSC “NPO “Almaz” (Moscow) E-mail: y0r1kcss@yandex.ru

The paper presents analytical study of two design versions of the antenna system measuring object angular coordinates, which are known as I.N. Amiantov's and R.M. Page's variants. Two mathematical models of phased antenna arrays with an analogue monopulse beamforming network (BFN) are used in this work for comparison of antenna system accuracy characteristics. The adequacy of the developed mathematical models is confirmed by the experimental results.

At the first stage of the work, experimental study of the error of determining the target angular coordinate as a function of the target height above the water surface has been conducted for the phased antenna array with I.N. Amiantov’s BFN. At the second stage of the work, a mathematical model containing the antenna array structure, elements’ characteristics, experimental conditions, parameters of the transmission path, which allows one to calculate the dependence of determining the target angular coordinate error on the height of the target location, has been developed. Comparative analysis of the experimental results and modeling has shown a high degree of their convergence. Then, using I.N. Amiantov’s and R.M. Page’s antenna systems and the developed mathematical models, capabilities of such angular meters in the presence of a coherent interference caused by the reflection from the underlying surface have been analyzed. In the course of modeling, typical trajectories of target motion have been considered: motion at constant altitude with varying range, as well as trajectories describing the target motion toward the antenna system with varying target altitude.

Analysis of the results of the comparative study has shown a significant advantage of Amiantov's systems by the error in determining the angular coordinate for all considered example trajectories. This fact can be used for recommending the I.N. Amiantov’s variant for application in the design of antenna systems whose task list includes the task of tracing the moving targets in the presence of a coherent interference caused by the reflection of the radio signal from the underlying surface.

1. Skolnik M.I. Radar handbook. McGraw-Hill. 1990.
2. Amiantov I.N. Izbrannye voprosy statisticheskoj teorii svyazi. M.: Sov. radio. 1971. S. 225–230.
3. Balagurovskij V.A., Kondrat'ev A.S., Polishchuk N.P. Metodika postroeniya vysokoeffektivnoj neekvidistantnoj fazirovannoj antennoj reshetki // Antenny. 2008. № 6. S. 18–22.
4. Patent № 2349997 RF. Sposob razmeshcheniya elementa v fazirovannoj antennoj reshetke / A.S. Kondrat'ev, N.P. Polishchuk, V.A. Balagurovskij, V.N. Mosalov. Opubl. 20.03.09. Byul. № 8.
5. Balagurovskij V.A., Kondrat'ev A.S., Polishchuk N.P. Metod opredeleniya koordinat nizkoletyashchej tseli // Radiotekhnika i elektronika. 2012. T. 57. № 10. S. 1104–1118.
6. Baskakov S.I. Elektrodinamika i rasprostranenie radiovoln. M.: Vysshaya shkola. 1992. S. 113–119.
7. Vasil'ev F.P. Metody optimizatsii. M.: Faktorial press. 2002. S. 21–24.
8. Patent № 2929056 US. Simultaneous lobe comparison, pulse echo location system / R.M. Page. 1960.