Home / Product / CRPA Antenna / Anti-jamming and anti-spoofing antenna / 4-element Array Anti‑Jamming And Anti‑Spoofing GNSS Antenna for UAV Navigation

4-element Array Anti‑Jamming And Anti‑Spoofing GNSS Antenna for UAV Navigation

4-element Array Anti‑Jamming And Anti‑Spoofing GNSS Antenna for UAV Navigation

Quantity:
Availability:





Inquire Add to Basket

Product Description

The spoofing antenna is a new single‑frequency GNSS antenna that goes beyond traditional suppression-only designs by addressing both jamming and spoofing threats in one compact unit. It supports BDS B1I/B1C, GPS L1 and Galileo E1, and is positioned for civilian and commercial platforms that need cleaner navigation signals, interference awareness and stronger resilience in complex RF environments.

Product overview

Unlike earlier anti-jamming antennas focused mainly on blocking suppression interference, AJ‑S4100 combines anti‑jamming and anti‑spoofing capability at the receiver front end through array signal processing and real-time interference mitigation. The system can actively null up to 3 suppression jammers while also identifying and handling up to 2 spoofing sources, including replay spoofing and generative spoofing, which helps improve trust in navigation data rather than only boosting signal survivability.

A further advantage is interference environment awareness: the antenna can report suppression jamming power, suppression jammer count and spoofing source count in real time, supporting smarter monitoring, safer platform behavior and faster system decisions. This makes the AJ‑S4100 a strong fit for UAVs and other commercial systems that need both navigation continuity and signal authenticity monitoring.

Key features

Dual-protection design for suppression jamming, spoofing and mixed suppression-spoofing attacks.

Four-element array architecture for spatial interference mitigation and stable front-end protection.

Support for BDS B1I/B1C, GPS L1 and Galileo E1 single-frequency operation.

Real-time interference awareness with reporting of jammer power, jammer quantity and spoofing source count.

Integrated receiver optimized for strong interference environments and UAV applications.

Clean RF output after suppression and spoofing mitigation for downstream navigation equipment.

Compact 100 mm × 100 mm housing, low weight and IP65-rated environmental protection for field deployment.

Technical specifications

Signal and protection performance

Item	Specification
Product type	Single-frequency high-performance anti-jamming & anti-spoofing antenna
Supported bands	BDS B1I / B1C, GPS L1, Galileo E1
Number of array elements	4 elements
Anti-jamming types	Broadband, narrowband, frequency-sweeping, pulse and combined suppression jamming
Number of jammers handled	1 to 3 sources from different directions
Single broadband anti-jamming capability	Interference-to-signal ratio ≥115 dB @ -130 dBm
Three broadband anti-jamming capability	Interference-to-signal ratio ≥100 dB @ -130 dBm
Anti-spoofing types	Replay spoofing, generative spoofing
Spoofing sources	Up to 2 sources from different directions
Special spoofing handling	Spoofing signals with J/S ratio ≥30 dB are classified and processed as suppression jamming
Environment awareness	Real-time reporting of suppression jamming power, jammer count and spoofing source count

RF output and receiver

Item	Specification
RF output power	-55 dBm to -70 dBm
RF impedance	50 ohms
Output VSWR	≤2.0
RF connector	SMA-K
RF output function	Clean B1/L1/E1 navigation signal after mitigation
Receiver capability	Built-in navigation receiver for strong interference and UAV use
Horizontal accuracy	≤7 m, 95%, PDOP≤4
Vertical accuracy	≤9 m, 95%, PDOP≤4
Velocity accuracy	≤0.2 m/s, 95%

Power and interfaces

Item	Specification
Operating voltage	DC 12V to 36V
Average power consumption	≤7 W typical in receiver continuous mode
AJ active power consumption	≤10 W with anti-jamming active
Power/data connector	J30J-9ZK
Serial level	LVTTL 3.3V default

J30J power and data interface

Pin	Signal	Description	Notes
1	+12V~+36V	Power input	Unit power supply
2	+12V~+36V	Power input
3	GND	Power ground
4	GND	Power ground
5	RX1	TTL receive	Receiver serial port, data input
6	RX2	TTL receive	Anti-jamming serial port
7	TX2	TTL transmit
8	TX1	TTL transmit	Receiver serial port, 5 Hz, 115200 baud, UBX with PVT/DOP/SAT/TIMEGPS by default
9	GND	Signal ground

Mechanical and environmental data

Item	Specification
Dimensions	100 mm × 100 mm × 24.5 mm (±0.5 mm)
Weight	≤280 g
Housing finish	Natural aluminum with conductive oxidation, silver-gray radome
Operating temperature	-40℃ to +70℃, 10%–90% RH, non-condensing
Storage temperature	-45℃ to +85℃, 10%–95% RH, non-condensing
Waterproof rating	Not lower than IP65
Burnout resistance	≥10 W
Shock test	ISO 19453-3:2018
Vibration test	ISO 5309:2023

Installation and application

The antenna is installed using hex studs and spring-loaded screws, with the base side intended for good heat dissipation and the top side facing open sky for GNSS reception. When the antenna is mounted under a cover, the material above it should be RF-transparent with at least 92% L-band transmission to preserve signal quality.

The Antenna is suitable for commercial UAVs, autonomous systems and other civilian navigation platforms where both interference suppression and spoofing awareness matter. If you need technical discussion or product consultation, please contact us by email or WhatsApp.

Here, we present a wider range of anti-jamming and anti-spoofing antenna products to help you select the one that best meets your needs.