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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 size‑constrained platforms that require reliable positioning in strong interference environments.

Key Features

Integrated design combining a four‑element antenna array, digital anti‑jamming processor and optional GNSS receiver in a 65 × 65 × 23.7 mm module for easy system integration.

Multi‑constellation support for BDS B1, GPS L1 and Galileo E1 bands, improving satellite availability and navigation robustness in complex electromagnetic environments.

Advanced spatial filtering to suppress 1–3 interference sources from different directions, including broadband, narrowband, swept‑frequency and pulse jamming waveforms.

Hight anti‑jamming performance, with 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 that outputs Position, Velocity and Time (PVT) solutions after anti‑jamming processing, reducing the need for external receiver modules.

Wide DC 9–36 V power input and low typical power consumption ≤6 W, suitable for battery‑powered and vehicle power systems.

Software‑selectable soft‑bypass and anti‑jamming modes via serial interface, enabling flexible switching between standard amplification and adaptive cancelation for testing and mission use.

Rugged construction with IP65 or higher protection, -40 ℃ to +70 ℃ operating temperature range, and compliance with civil small and light UAS shock and vibration standards.

Product Drawings of Anti-Jamming Unit

Figure 2-1 Product Drawings of Anti-Jamming Unit

Figure 2-2 Dimensions Drawing of Anti-Jamming Unit

Typical Applications

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 jamming

Anti‑Jamming Performance

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 and combinations	Designed for complex suppression threats
Simultaneous interferers	1–3 sources	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 the antenna port

Built-In GNSS Receiver (Optional)

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)	Suitable 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 and Data Interface

Power & Data Connector (J30J-9ZK)

Pin	Signal	Description
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

Mechanical Design

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 on side	Refer to mechanical drawing for layout

For installation, the metal bottom surface should have good thermal contact with a metal plate or be mounted with sufficient airflow to enhance heat dissipation; the top surface is the GNSS receiving plane and must face open sky without obstruction, or, if installed inside a platform, be covered by L-band RF-transparent material with transmission ≥92%.

Environmental and Reliability Ratings

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 for civil small/light UAS shock testing
Vibration test standard	ISO 5309:2023 for civil small/light UAS vibration testing

Standard Delivery Contents

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

Packaging

The unit is supplied in a paper carton with internal shock absorbing cushioning to protect against vibration and drops during transportation, making it suitable for international shipping and repeated handling in integration and testing workflows.

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