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AJU‑4065 Compact Four‑Element GNSS Anti‑Jamming Navigation Unit for UAV And Vehicle Platforms

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Product Description

AJU-4065 is a compact, four‑element integrated GNSS anti-jamming navigation unit designed for UAVs, UGVs, USVs and other SWaP‑constrained platforms that need reliable positioning in strong interference environments.
The module combines a four‑element antenna array, digital anti‑jamming processor and optional GNSS receiver in a 65 × 65 × 23.7 mm housing for fast system integration.

Key Features

Integrated 4‑element antenna array + digital anti‑jamming processor + optional GNSS receiver in one 65 × 65 × 23.7 mm module, reducing wiring and saving payload space.
Supports BDS B1, GPS L1 and Galileo E1 constellations to improve satellite availability and navigation robustness in complex electromagnetic environments.
Advanced spatial filtering cancels 1–3 jamming sources from different directions, including broadband, narrowband, swept‑frequency and pulse interference.
High anti‑jamming performance: single broadband interference suppression up to ≥100 dB, and three‑signal broadband interference suppression up to ≥85 dB at -130 dBm.
Optional built‑in GNSS receiver outputs PVT (Position, Velocity, Time) after anti‑jamming processing, eliminating external receiver boards in many designs.
Wide DC 9–36 V input and typical power consumption ≤6 W, ideal for battery‑powered drones and vehicle platforms.
Software‑selectable soft‑bypass and anti‑jamming modes via serial interface for convenient testing, debugging and mission switching.
Rugged IP65+ enclosure, -40 ℃ to +70 ℃ operating temperature, qualified to civil small/light UAS shock and vibration standards.

Application Scenarios

High anti‑jamming GNSS navigation for multirotor and fixed‑wing UAVs.
Integrated navigation antenna for ground vehicles, marine platforms and unmanned surface vessels.
GNSS front‑end for gimbals, EO/IR payloads and airborne pods.
Static or mobile reference stations, test ranges and measurement systems in interference‑prone environments.
Dual‑use and defense‑related projects requiring resilient navigation under intentional

Anti-interference Performance Parameter

Item	Specification	Description
Supported frequency bands	BDS B1, GPS L1, Galileo E1	Multi‑GNSS coverage for higher availability.
Number of channels	4‑element array	Four‑channel spatial processing.
Jamming types	Broadband, narrowband, swept, pulse, combinations	Designed for complex jamming threats.
Simultaneous interferers	1–3 sources	From different directions in B1/L1/E1 bands.
Single broadband interference suppression	≥100 dB @ -130 dBm	Strong anti‑jamming margin.
Three broadband interference suppression	≥85 dB @ -130 dBm	Multi‑source interference handling.
Spatial coverage	Azimuth 0°–360°, elevation -10°–90°	Full azimuth and wide elevation coverage.

RF Output Specifications

Parameter	Value	Notes
RF output power	-55 dBm to -70 dBm	Suitable for standard GNSS front‑ends.
RF output impedance	50 Ω	Industry‑standard impedance.
Output VSWR	≤2.0	Ensures good RF matching.
RF connector	SMA‑K (female)	Outputs processed B1/L1/E1 signals.
RF port burnout resistance	≥10 W	Withstands high‑power input at antenna port.

Optional Built-in GNSS Receiver Specifications

Item	Specification	Notes
Supported bands	B1 / L1 / E1	Aligned with array front‑end bands.
Horizontal position accuracy	≤7 m (95%, PDOP ≤4)	After anti‑jamming processing.
Vertical position accuracy	≤9 m (95%, PDOP ≤4)	For general navigation tasks.
Velocity accuracy	≤0.2 m/s (95%)	Supports guidance and control loops.
Example receiver models	u‑blox NEO‑M9N, UM960 (optional)	Configurable per project needs.

Power & Data Connector (J30J‑9ZK)

1	+9 V ~ +36 V	Power input.
2	+9 V ~ +36 V	Power input (parallel).
3	GND	Power ground.
4	GND	Power ground.
5	RS422 RX-	RS422 receive negative, configuration and control.
6	RS422 RX+	RS422 receive positive.
7	RS422 TX-	RS422 transmit negative, status/data output.
8	RS422 TX+	RS422 transmit positive.
9	GND	Ground.

Power Supply

Item	Value
Operating voltage range	DC 9 V ~ 36 V.
Average power consumption	≤6 W.

Structure Parameter

Item	Specification	Description
Dimensions (L × W × H)	65 mm × 65 mm × 23.7 mm (±0.5 mm)	Compact square form factor.
Weight	≤200 g	Suitable for small UAV payload limits.
Housing material	Natural aluminum with conductive oxidation	Provides shielding and heat dissipation.
Radome color	Silver‑gray / white	Visually compatible with common platforms.
Mounting interface	4 × M2.5 threaded holes, depth 2.4 mm (side)	Refer to mechanical drawing for layout.

Installation Recommendations: The metal base must establish good thermal contact with the device's metal chassis—or ensure adequate airflow—to enhance heat dissipation. The top surface serves as the GNSS receiving face and should be oriented toward an unobstructed sky; if installed internally, it must be covered by an L-band RF-transparent material with a transmission rate of ≥92%.

Environmental and Reliability Metrics

Item	Specification
Operating temperature	-40 ℃ ~ +70 ℃, 10% ~ 90% RH, non‑condensing.
Storage temperature	-45 ℃ ~ +85 ℃, 10% ~ 95% RH, non‑condensing.
Ingress protection	Not lower than IP65.
MTBF	≥2000 h.
Continuous operating time	≥24 h.
Shock test standard	ISO 19453‑3:2018 (civil small/light UAS shock testing).
Vibration test standard	ISO 5309:2023 (civil small/light UAS vibration testing).

Standard Shipping Checklist

No.	Item	Quantity	Remarks
1	AJU‑4065 integrated navigation anti‑jamming unit	1	65 × 65 mm module.
2	Connection cable	Optional	Length and connector types customizable.
3	Built‑in navigation receiver	Optional	Multiple GNSS modules supported.
4	G1 frequency option	Optional	Increases power consumption when enabled.
5	Mounting screws	1 set	4 × M2.5 × 2.4 mm screws.
6	Documentation	1 set	User manual and technical notes.

The unit is shipped in a protective paper carton with internal shock‑absorbing cushioning, suitable for international transportation and repeated handling during integration and testing.

If you are interested in our products or would like to discuss technical details, you are very welcome to contact us at any time by email, phone or WhatsApp. We will be pleased to communicate with you and will do our best to support your projects.