Product Overview
The AJU-4050 is a micro four-element CRPA navigation anti-jamming unit that protects GNSS positioning on GPS L1, BDS B1 and Galileo E1 for size- and weight-critical platforms such as small UAVs, loitering munitions and handheld devices. Despite its 50 mm footprint and 120 g weight it delivers 95 dB of single-jammer rejection, and an integrated multi-constellation receiver outputs independent NMEA positioning results for backup navigation. Typical applications: Small UAV platforms, loitering munitions, handheld terminals, GNSS-rover backup navigation.
Key Features
- CRPA (controlled reception pattern) antenna array that adaptively nulls jamming sources while keeping the GNSS main beam on satellites
- Suppresses wideband, narrowband, frequency-sweep and pulse jamming, and combinations of these, on GPS L1 / BDS B1 / Galileo E1; capability: Single jammer ≥ 95 dB; three jammers ≥ 80 dB (J/S @ -130 dBm)
- Built-in multi-constellation GNSS receiver outputs NMEA positioning data (GGA/GSV/RMC/VTG/ZDA) over the data interface
- SMA-K anti-jammed RF output, J30J power-and-data connector, 50-ohm matching with VSWR <= 2.0
- IP65 protection, -40C to +70C operating range, shock and vibration tested per UAV environmental standards
Technical Specifications
| Parameter | Specification |
|---|---|
| Array type | Micro 4-element array |
| Dimensions | 50 x 50 x 21.3 mm (±0.5 mm) |
| Weight | ≤ 120 g |
| Power consumption | ≤ 6 W |
| Frequencies (default) | B1 / L1 / E1 |
| Anti-jamming capability | Single jammer ≥ 95 dB; three jammers ≥ 80 dB (J/S @ -130 dBm) |
| Interference coverage | Azimuth 0-360°, elevation -10° to +90° |
| RF output | SMA-K, -55 to -70 dBm, 50 Ω, VSWR ≤ 2.0 |
| Data interface | J30J-9ZK power/data connector; LVTTL 3.3 V default, RS422 optional |
| Built-in GNSS receiver | Horizontal ≤ 7 m, vertical ≤ 9 m (95%, PDOP ≤ 4); velocity ≤ 0.2 m/s |
| Antenna port burnout resistance | ≥ 10 W |
| Supply voltage | DC 9 – 36 V |
| Operating temperature | -40°C to +70°C, 10-90% RH non-condensing |
| Storage temperature | -45°C to +85°C |
| Ingress protection | IP65 |
| Shock / vibration | Tested per civilian UAV system environmental test standards |
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