1 .Overview

Two-dimensional phased array low-altitude early warning radar LW-R15-K-2 is mainly used for detecting various airborne targets. It mainly consists of an active array subsystem, a digital transceiver subsystem, a frequency synthesis subsystem, a signal and data processing subsystem, and a power supply subsystem, including two parts: antenna array unit and back-end processing unit. The antenna array unit mainly includes the array frame, chip antenna array, digital transceiver components, frequency source, and supporting equipment such as GPS/BD positioning/north-spot timing system. The back-end processing unit mainly includes a high-performance computing platform.

1.1 Functional requirements

(1) It has the ability to actively search, capture and track various low-altitude aircraft targets in key detection directions；

(2) Possesses the ability to measure parameters such as target azimuth, elevation, distance, and velocity;

(3) It can provide a real-time target information data interface for other devices;

(4) Possesses remote control capability.

1.2 Key combat technical requirements

1.2.1 Key tactical indicators

• Radar system

Two-dimensional active phased array, three-coordinate (distance, azimuth, altitude) system.

• Operating frequency and bandwidth

X-band 9.2GHz~9.8GHz, operating bandwidth 600MHz.

• Measured elements

Target distance, azimuth, elevation angle, and speed.

• Radar range

Display range: 35km ;

Maximum detection range : ≥ 15 km (RCS=0.03 m² , SWI target,Pd=0.8，Pfa=10^-6） ;

Maximum detection range : ≥20 km (RCS=0.1m² ^, SWI target,Pd=0.8，Pfa=10^-6） ;

Blind spot: ≤300m.

• Coverage

Two-dimensional electronic scanning search mode airspace coverage: elevation 0°~50°, azimuth ±45°;

Two-dimensional electronic scanning tracking mode airspace coverage: elevation 0°~60°, azimuth ±45°.

• Resolution and measurement accuracy

Distance resolution: ≤10m;

elevation angle resolution: ≤3°;

Azimuth resolution: ≤3°;

Velocity resolution: ≤0.5m/s (tracking mode);

Minimum detection speed: 1 m/s;

Distance measurement accuracy: ≤10m;

Azimuth measurement accuracy: ≤0.3°;

elevation angle measurement accuracy: ≤0.35°.

• Data rate

Phase scan (search): ≤6s (no tracking in low-altitude reconnaissance mode);

Phase scan (tracking): ≥2Hz (4 targets).

• Anti-interference measures (ECCM):

Multiple operating frequencies are available;

Waveform parameters can be set;

Radar trajectory memory extrapolation.

1.2.2 External Interface

•  Data interface

Uses the IP protocol.

•  Timing interface

GPS/Beidou timing.