MR-750 “Top Plate”
Description of the radar set, tactical-technical characteristics
Figure 1: MR-750 “Top Plate”
(© 2015 Jörg Waterstraat www.kriegsschiffe.net)
| Specifications | |
|---|---|
| frequency: | D/E-band |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | |
| pulsewidth (τ): | |
| receiving time: | |
| dead time: | |
| peak power: | |
| average power: | |
| instrumented range: | 150 or 300 km |
| range resolution: | |
| accuracy: | 120 m, 0.25° |
| beamwidth: | |
| hits per scan: | |
| antenna rotation: | 12 or 6 min⁻¹ |
| MTBCF: | |
| MTTR: | |
MR-750 “Top Plate”
MR-750 “Top Plate” «Fregat-MA» («Фрегат-МА») (meaning frigatebird) is operating in the D and E-band air and surface surveillance radar for maritime use. The export version got the suffix «Э» in the name: «Фрегат-МАЭ». It is a three-dimensional system which employs back-to-back antennas whose opposite antennas are optimized for two different frequency bands, which is why one antenna appears slightly smaller. The antennas are serially fed frequency scanning phased array antennas. Since the frequency-dependent beam swiveling also affects the horizontal antenna rows, the resulting antenna beam swivels from bottom right to top left:i.e. diagonally. In order to compensate for this, the entire antenna face was rotated until the beam swiveling appears vertical again.