ONWA Open-Array Radar Antenna KRA-3002/KRA-4001 imarinex

KRA-3002/KRA-4001

Open-Array Radar Antenna

Features

• Digital Radar Target Technology
• Share the same protocol between all ONWA magnetron pulse Radar antennas
• Built-in excellent sea and rain clutter algorithm
• Fully Digital Signal Processing
• High Performance Microwave front end
• Can be connected to PC directly or through home router
• Can use with DigiNav Application Software

Specifications

 Antenna Radiator

Radiator

Slotted waveguide Array

Radiator Length

KRA-4001: 120 cm
KRA-3002: 180 cm

Antenna Rotation Speed :         24RPM

Beam Width                                

Horizontal:
KRA-3002: 1.2°
KRA-4001: 1.9°
Vertical
KRA-3002: 22°
KRA-4001: 22°

Sidelobe

Within ± 20° off mainlobe; less than -24 dB
Outside ± 20° off mainlobe; less than -30 dB

Polarization:                         Horizontal

Wind Resistane

KRA-4001: Relative Wind Speed 100 knots (51.5 m/s)

Transceiver Module (contained in Antenna)

Transmitting Tube

KRA-3002: MSF1425
KRA-4001: MAF1422 or MSF1422

Frequency :               9410 ± 30MHz (X-band)

Pulse Length PPR

0.08 µ S/2100 Hz(0.125, 0.25, 0.5, 0.75, 1.5 nm)
0.3µ S/1200 Hz(1.5, 2, 3 nm)
0.8 µ S/600 Hz(3, 4, 6, 8, 12, 16, 24, 36,48, 64,72 nm)

Warm Up time :                 1:30 minutes

Peak Output Power

KRA-3002: 12.5 kW nominal
KRA-4001: 6 kW nominal

Modulator:                             FET Switching Method

IF:                                              60MHz

Tuning:                                    Automatic or Manual

Receiver front end:             MIC (Microwave IC)

Bandwidth

Tx pulselength 0.3 µ S and 0.08 µ S: 25 MHz
Tx pulselength 0.8 µ S: 3 MHz

Duplexer :                              Circulator with Diode Limiter

 Environment

Temperature :                        Antenna unit: -25 to +70°C

Humidity :                               Relative humidity 93% or less at 40°C

 Power Supply

±12VDC external regulated power supply