Dual-chip architecture integrating a CRPA antenna array, adaptive anti-jamming processing, and a GNSS receiver within a single enclosure.
Compact 65 × 65 × 22 mm form factor and ≤150 g weight, optimized for small UAV and other SWaP-constrained platforms.
Total system power consumption < 7 W.
Automatically detects and mitigates interference signals within the operational environment in real-time.
AJS-4-65 is a compact anti-jamming GNSS unit integrating a 4-element CRPA antenna array, adaptive anti-jamming processing, and a GNSS receiver in a single enclosure.
It improves interference resilience in the BDS B1 and GPS L1 bands, mitigating broadband, pulsed, narrowband, and swept-frequency interference.
The highly integrated dual-chip architecture enables a compact, lightweight, and power-efficient solution compared with conventional FPGA-based systems, making it ideal for UAV and other SWaP-constrained platforms.
The 4-element CRPA array dynamically identifies jamming signals and creates “Deep Nulls” in their direction. Even with multiple or mirrored jammers, the antenna maintains a high-gain beam toward GNSS satellites, ensuring uninterrupted PNT (Position, Navigation, and Timing) in contested environments.
| RF & Performance Specifications | |
|---|---|
| Antenna Elements | 4 Elements |
| Frequency | GPS L1, BDS B1(Expandable) |
| Impedance | 50Ω |
| Passive Gain | 2.0dBi (maximum) |
| Isolation | ≥15dB |
| LNA Gain | 21 ± 1dB |
| Noise Figure | ≤2dB |
| Out-of-Band Rejection | ≥50dB @F0±50MHz |
| Jammer / Signal (J/S) | ≥100dB (Single), ≥90dB (Triple) |
| Number of Jamming Sources | ≥3 |
| Electrical Specifications | |
| Voltage | 9 ~ 36VDC |
| Power Consumption | ≤7W |
| Mechanical & Environmental | |
| Dimensions | L65 × W65 × H22mm |
| Weight | ≤150g |
| Connector | J30J-9ZK |
| Waterproof Rating | IP65 (Mounting) |
| Mounting | Screws Mount: 4 × M2.5 |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -55°C to +85°C |
| RF & Performance Specifications | |
|---|---|
| Antenna Elements | 4 Elements |
| Frequency | GPS L1, BDS B1(Expandable) |
| Impedance | 50Ω |
| Passive Gain | 2.0dBi (maximum) |
| Isolation | ≥15dB |
| LNA Gain | 21 ± 1dB |
| Noise Figure | ≤2dB |
| Out-of-Band Rejection | ≥50dB @F0±50MHz |
| Jammer / Signal (J/S) | ≥100dB (Single), ≥90dB (Triple) |
| Number of Jamming Sources | ≥3 |
| Electrical Specifications | |
| Voltage | 9 ~ 36VDC |
| Power Consumption | ≤7W |
| Mechanical & Environmental | |
| Dimensions | L65 × W65 × H22mm |
| Weight | ≤150g |
| Connector | J30J-9ZK |
| Waterproof Rating | IP65 (Mounting) |
| Mounting | Screws Mount: 4 × M2.5 |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -55°C to +85°C |
Power / Data Interface:
The power and communication interface uses a J30J-9ZK connector. DC power input and RS422 communication for control/status integration.
| J30J-9ZK Pin | Signal | Type | Description |
|---|---|---|---|
| 1# | Power+ | Power | DC 9-32V (12V Recommended) |
| 2# | Power+ | Power | DC 9-32V (12V Recommended) |
| 3# | Ground | Power | Ground |
| 4# | Ground | Power | Ground |
| 5# | RS422 RX- | Input | Receive - |
| 6# | RS422 RX+ | Input | Receive + |
| 7# | RS422 TX- | Output | Transmit - |
| 8# | RS422 TX+ | Output | Transmit + |
| 9# | — | — | Reserved / NC |
For compact aerial platforms requiring low-SWaP anti-jamming capability and stable GNSS performance under contested RF conditions.
Suitable for unmanned ground systems operating in interference-prone, urban, or low-elevation jamming environments.
Designed for maritime and surface platforms requiring robust GNSS continuity in complex electromagnetic environments.
For compact aerial platforms requiring low-SWaP anti-jamming capability and stable GNSS performance under contested RF conditions.
Suitable for unmanned ground systems operating in interference-prone, urban, or low-elevation jamming environments.
Designed for maritime and surface platforms requiring robust GNSS continuity in complex electromagnetic environments.