Description
A micro 4-element anti-jamming GNSS antenna with built-in receiver for BDS B1 / GPS L1 / Galileo E1 signals, suppressing up to 3 jammers (single jammer: j/s ≥ 95 db) and outputting both PVT solutions and a protected RF output.
The AJU-4050 Micro Four-Element Anti-Jamming GNSS Antenna is a navigation anti-jamming antenna that integrates a multi-element controlled reception pattern antenna (CRPA) array, an anti-jamming processing module and a built-in GNSS receiver in a single unit. It supports reception, amplification, down-conversion, filtering, anti-jamming processing and up-converted RF output of 4-channel BDS B1 / GPS L1 / Galileo E1 signals. Using adaptive spatial-domain filtering, it suppresses 1–3 jammers from different directions, including wideband, narrowband, frequency-sweep and pulse jamming, and combinations thereof, over a spatial coverage of Azimuth 0°–360°, elevation -10°–90°. The built-in receiver performs PVT (position, velocity, time) solving and outputs positioning results (Horizontal ≤ 7 m, vertical ≤ 9 m (95%, PDOP ≤ 4); velocity ≤ 0.2 m/s (95%)) through the data interface, while a processed RF output (-55 dBm to -70 dBm, 50 Ω, VSWR ≤ 2.0) is available for external GNSS receivers. The antenna port withstands RF input of ≥ 10 W. The unit is rated for operation from -40 °C to +70 °C (10%–90% RH, non-condensing) with storage from -45 °C to +85 °C (10%–95% RH, non-condensing) and an ingress protection of ≥ IP65, and is qualified with shock (Tested per ISO 19453-3:2018) and vibration (Tested per ISO 5309:2023) testing per civil UAV environmental test standards. Installation notes require the metallic base to be mounted against a good heat-dissipating surface and the antenna face to have an unobstructed view of the sky; when installed inside a platform, the radome-side surface must be RF-transparent (≥92% transmission in the L band).
Key specifications: Array Type: Micro 4-element CRPA array; Channels: 4; Supported Bands: BDS B1 / GPS L1 / Galileo E1; Jamming Types Suppressed: Wideband, narrowband, frequency-sweep and pulse jamming, and combinations thereof; Number of Jammers Suppressed: 1–3; Anti-Jamming Capability (J/S @ -130 dBm): Single jammer: J/S ≥ 95 dB; Three jammers: J/S ≥ 80 dB (both @ -130 dBm).
Specifications
| Parameter | Value | Unit |
|---|---|---|
| Array Type | Micro 4-element CRPA array | |
| Channels | 4 | |
| Supported Bands | BDS B1 / GPS L1 / Galileo E1 | |
| Jamming Types Suppressed | Wideband, narrowband, frequency-sweep and pulse jamming, and combinations thereof | |
| Number of Jammers Suppressed | 1–3 | |
| Anti-Jamming Capability (J/S @ -130 dBm) | Single jammer: J/S ≥ 95 dB; Three jammers: J/S ≥ 80 dB (both @ -130 dBm) | |
| Jamming Suppression Spatial Range | Azimuth 0°–360°, elevation -10°–90° | |
| RF Output Power | -55 dBm to -70 dBm | |
| RF Impedance | 50 Ω | |
| Output VSWR | ≤ 2.0 | |
| Built-in Receiver Position Accuracy | Horizontal ≤ 7 m, vertical ≤ 9 m (95%, PDOP ≤ 4) | |
| Built-in Receiver Velocity Accuracy | ≤ 0.2 m/s (95%) | |
| Built-in Receiver Output | NMEA GGA, GSV, RMC, VTG, ZDA; update rate 5 Hz; baud rate 115200 | |
| Antenna Port Burnout Resistance | ≥ 10 W | |
| Dimensions | 50 × 50 × 21.3 mm (±0.5 mm) | |
| Weight | ≤ 120 g | |
| Power Consumption | ≤ 6 W | |
| Supply Voltage | DC 9–36 V | |
| Interface | J30J-9ZK (9-pin) + SMA-K RF output | |
| Signal Level | LVTTL (3.3 V) default, RS422 optional | |
| Data Interface | GNSS receiver output: 5 Hz, 115200 bps, NMEA (GGA/GSV/RMC/VTG/ZDA) | |
| Operating Temperature | -40 °C to +70 °C (10%–90% RH, non-condensing) | |
| Storage Temperature | -45 °C to +85 °C (10%–95% RH, non-condensing) | |
| Ingress Protection | ≥ IP65 | |
| Shock Test | Tested per ISO 19453-3:2018 | |
| Vibration Test | Tested per ISO 5309:2023 | |
| Mounting | 4 × M3 |
All specifications are taken from the manufacturer’s current datasheet.
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