Detect
Continuously monitor the spatial RF environment across the four-element array.
Resilient Navigation / CRPA-400X
Protect position.
Preserve control.
A compact four-element CRPA system that protects existing GNSS receivers against interference and deceptive signals—without redesigning the navigation stack.
01
02
03
04
CRPAProtected
signalRF OUT
ADAPTIVE SPATIAL FILTER / ACTIVEsignalRF OUT
Array architecture4 elementsAdaptive spatial reception
Protection startup< 1 secRapid autonomous initialization
Array mass112 gCompact airborne configuration
Navigation coverageMulti-bandMulti-constellation GNSS
Protection before the receiver
Keep the navigation system.
Change its resilience.
CRPA-400X places adaptive spatial protection between the sky and the existing GNSS receiver. The system evaluates signals across a four-element array, rejects interference by direction and passes a protected RF output downstream.
That architecture creates a clean retrofit path for unmanned platforms, autonomous systems and critical infrastructure where receiver replacement or software redesign is impractical.
Protection sequence
From contested spectrum
to trusted position.
Detection, spatial verification and adaptive rejection operate ahead of the navigation receiver.
Verify
Separate authentic satellite geometry from interference and deceptive signal directions.
Adapt
Steer spatial rejection toward changing interference sources in real time.
Deliver
Output a protected analog GNSS signal to the existing receiver and autopilot.
Universal integration path
One protected output.
No new navigation stack.
The unit is designed to connect to a standard GNSS antenna input while a separate diagnostic channel provides platform awareness.
01Four-element arraySpatial sampling
02Protection processorDetect / verify / adapt
03Existing GNSS receiverProtected RF input
04Autopilot / mission systemPosition / timing
Representative integration targets
u-blox / NovAtel / Septentrio / Trimble / Pixhawk / ArduPilot
Public specification
Compact enough for the airframe.
Detailed protection performance, threat capacity and algorithm parameters are provided through controlled engineering engagement.
- Product architecture
- Four-element controlled reception pattern antenna
- Navigation support
- Multi-band GPS, Galileo, BeiDou and GLONASS
- Receiver connection
- Single protected 50 Ω RF output
- Startup
- Protection available in under one second
- Array envelope
- 140 mm diameter × 41 mm
- Array mass
- Approximately 112 g
- Power
- 9–16 VDC platform supply; below 18 W
- Environmental design
- IP67 enclosure; −40 °C to +70 °C operating range
Diagnostics & assurance
Protection you can
observe and trust.
Operational telemetry makes the protection state visible to the mission system while built-in tests continuously monitor hardware health.
Protected RF output
A cleaned analog GNSS signal connects directly to the receiver antenna input.
Retrofit integration
Designed to add protection without changing receiver firmware or navigation software.
Live diagnostics
Interference state, antenna health and protection status are available to the platform.
Built-in assurance
Continuous self-test monitors array, cable and RF front-end integrity.
Diagnostic interface
Serial / USB telemetry for interference monitoring, protection alerts and hardware self-test
Configure resilient navigation
Tell us the receiver,
platform and threat environment.
RFortis engineering will define the appropriate array, mounting, power and interface configuration for your programme.
Published figures are configuration-dependent engineering targets and require programme-specific validation, integration and approvals.