YLC-6M Radar Technical System
electric resistance
The Reflector antennas of YLC-6M radar “2D radar” can achieve the best electric performances ever, such as low side lobe “maximum side lobe level less than or equal -30dB, An average side lobe level less than or equal -40dB”, higher gain, lighter weight, and suitable environment adaptability “without Dew effects like planar array Radome”. Moreover, it can provide a high full cycle efficiency/cost ratio.
In YLC-6M radar, it’s assembled together with three blocks. At the transportation state, the middle block lies back onto the roof of the transmitter cabin, when the two edge blocks are disassembled with one on each side of the transmitter cabin. Notwithstanding, it’s assured that the radar system can’t go beyond the limit of the transportation height when it’s transported. The use of Quincunx Hollow reflector antenna not only can meet the requirements for Hyperboloid accuracy; nevertheless, can reduce weight and decrease wind resistance to allow the radar operates in the more severer environment. It is unnecessary to pack the Radome on the reflector antenna; accordingly, the environmental factors, such as temperature, humidity, etc.
YLC-6M radar is a medium/low altitude, 2D radar system. In beam design, it takes a full consideration of radar’s low altitude performance, also ground clutter rejection capability; therefore, a combination of a high & low beam is used:
– The low beam is a common beam for both transmitting and receiving. Its elevation is 2.7 degrees, furthermore, used for the detection of long-range targets.
– The high beam is a beam only for receiving. Its elevation is 7 degrees. It can be used to reject the strong ground clutter effectively! Ordinarily, used for the detection of short-range targets or targets just above the head.
YLC-6M radar is a highly mobile medium/low altitude surveillance radar, with different operating ranges; consequently, can detect short-range air targets. Wherefore a various signals are designed, among which the signal with pulse duration of 100 ms (microsecond) is used for the detection of long-range targets. However, It can result in the corresponding short-range blind area. Consequently, an additional carrier frequency signal with pulse duration of 0.8 ms is transmitted within every PRI (Primary Rate Interface) for range blind area compensation. The signal with pulse duration of 100 ms is a non-linear FM rectangular pulse signal. Its echo is compressed into a signal of 0.8 ms by a digital matching filter, so that both: The radar detection coverage, also the high range resolution can be achieved without using higher transmitted power. The use of lower radar transmitted power allows not only the decrease of radar-intercepted probability, but the increase of radar’s anti-reconnaissance capability too. As well it provides the conditions for the modular design of radar solid state transmitters.
END OF PART II