E. V. Ovchinnikova, A. A. Sokolov

Practically in all areas of radio engineering it is required to ensure functioning or in a wide band, or on several frequency ranges. In the majority of the published works the combined aerials in which narrow-band radiators and distributive systems, the on each range are applied are resulted. Thus to be spent physical combination of aerials of different ranges. However, modern technologies allow to create the broadband or combined antenna systems realizing radiation of several wave bands in one antenna cloth. In particular interest represents creation of antenna system which can replace with itself antenna systems of a secondary radar and antenna system of the state radar-tracking identification. The antenna array of a radar consists of the broadband elements raised by broadband distributive system (a Fig. 1). The array consists of 16 elements, each of which represents exponential slot (a Fig. 2). Results of mathematical and electrodynamic modeling are presented on fig. 4,5. On fig. 6 the kind a cut of an antenna array is shown. On it materials of which the experimental specimen of an antenna array is made are allocated. The description of a design of an antenna array further follows. The general view of distributive system is presented on fig. 7. Tests of a breadboard model of an antenna array were spent in the anechoic chamber. Appearance of the stand is presented on fig. 8. The stand description is more low resulted. On fig. 9 pattern in azimuthal and elevation the planes, received as a result of processing by the program of experimental data are resulted. On fig. 10 pattern received as a result of electrodynamic modeling are resulted. On fig. 11 results of experimental researches of characteristics of the coordination in ranges interesting us are shown. On fig. 12 peak distributions of three specimen of a linear antenna array, on frequency of 1090 MHz received as a result of laboratory researches, and the peak distribution calculated by numerical methods by means of computer modeling are presented. From fig. 12 it is visible that the results received experimentally, differ from settlement not considerably. Thus, the experimental research of a dual-band antenna array is spent. Also, pattern in azimuthal and elevation planes and the peak distributions received by means of numerical electrodynamic modeling and as a result experiment are presented. The dual-band antenna array in the printing execution, forming cosecant pattern. The done work allows to predict use of the given experience of working out, for creation of broadband one-aperture aerials on the strip lines working in a L-range (1030-1090 MHz, 1250-1350 MHz, 1450-1550 MHz), for radar stations.