Pro Defense 2017 exhibition organized in Ostróda became an occasion for the PIT-RADWAR company to present its short range mobile radars, the latest example of which, the Sajna system, may turn out to be quite usable in case of the Narew and Wisła air defence assets.
Mobile radar solutions presented by the PIT-RADWAR, a company belonging to the Polish Armaments Group, in Ostróda are the well known Soła and Bystra systems. These solutions are lookalikes, at least externally (due to the fact that both systems have been mounted on a Żubr platform), however the antennas and bandwidth used in case of both proposals differ.
In case of the Soła station, which is the oldest one of the kind, PESA (Passive Electronically Scanned Array) antenna has been applied, in case of which the elements are powered by a single transmitter based on a current wave tube. The transmitter is operated in the S-band. Bystra radars, on the other hand, make use of an AESA antenna (Active Electronically Scanned Array), consisting of numerous semiconductor-based transmitter-receiver modules tuned to function in the C-band. Both radars, due to their insufficient range and accuracy, cannot be utilized as a multifunctional fire control radar.
Sajna radar is the one that is to offer a proper set of capabilities, this system is currently at the design stage. Similarly to the Bystra system, Sajna is operated within the C-band, and it makes use of an AESA antenna. The antenna array is supposedly to include around 1500 individual transmitter-receiver modules.
According to the PIT-RADWAR’s representatives, the system may be even used as means for guidance of medium range missile, hence it may be utilized to meet the requirements of the Wisła programme. The guidance is realized through leading the missile towards the region where its seeker (IR or radar based) may intercept the target and take over the guidance process at that point. This would require a great degree of accuracy, when it comes to determination of the parameters ascribable to the objects being tracked, especially at the longer distances.