E.S. Bitaev - Ph.D. (Eng.), Lecturer at the Department of Special Radio-Technical Systems, Military Academy of the Military Defense of the Armed Forces of the Russian Federation named after Marshal of Soviet Union A.M. Vasilevsky A.V. Obysov - Ph.D. (Eng.), Associate Professor at the Department of Antiaircraft Short-Range Complex, Military Academy of the military defense of the Armed Forces of the Russian Federation named after Marshal of Soviet Union A. M. Vasilevsky A.A. Karankevich - Post-graduate Student, Radioelectronic Subdepartment of Bauman Moscow State Technical University

The necessity of ultra wide band radiolocation development is following the tendency of common radio electronic development. Ultra wide band radiolocation systems are able to solve different tasks like target class and type recognition in presence of disturbing ref-lections, both natural and artificial. Ultra wide band systems require special antennas with ultra wide band of working frequencies. The development of these antennas is very difficult due to inability to use traditional calculation methods. The instruments for calculation of such antennas include special mathematical packages that make possible to calculate the parameters of antenna grids with required radiation pattern and sufficient accuracy. The most popular packages are: HSST, CST Microwave Studio, FEKO. Different packaged provide different methods, approximations and the combination of these packages allows the developer to choose the most adequate approach according to the requirements of the technical task. The element of antenna grid must have small size, wide band and be highly technological in production. The patch emitter is sufficient for these requirements. Such patch emitter for a frequency of 9.5 GHz is shown on picture 1. The substrate is a microwave dielectric material ROGERS 4003C with . The power sullpy is a coaxial line with a resistance of 50 Ohm. Picture 2 shows the radiation patterns of the patch antenna in different planes. The width of the beam is 97×83,4°. The prototype of the antenna constructed with these patch emitters is shown on picture 3. The grid-s band is around 2.1 GHz with antenna gain more than 16 dB. Picture 4 shows the radiation pattern of the prototype in radial and Cartesian coordinates.

 

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