CRPA Reference Design for Resilient GNSS Development
Positioning, navigation, and timing systems are becoming increasingly vulnerable to jamming, spoofing, and multipath interference. The Taoglas Controlled Reception Pattern Antenna (CRPA) Reference Design provides OEMs and system integrators with a practical starting point for developing more resilient GNSS systems. Built using commercial off-the-shelf GNSS antennas, front-end modules, and supporting circuitry, the design helps reduce development risk while accelerating evaluation of anti-jam GNSS architectures.
What is a CRPA?
A conventional GNSS antenna receives signals from across the sky using a fixed reception pattern. While effective in open environments, it cannot distinguish between legitimate satellite signals, interference sources, or reflected signals. A CRPA array takes a different approach. Multiple GNSS antenna elements are combined within an array and managed using controlled amplitude and phase weighting. This allows the system to dynamically shape its reception pattern in real time. Three core capabilities make CRPA technology possible:
Beamforming: Enhances reception in the direction of desired GNSS satellites, improving signal quality and effective sensitivity.
Null Steering: Creates areas of reduced sensitivity toward interference sources such as jammers and spoofers.
Multipath Suppression: Helps reject unwanted reflected signals that can degrade positioning accuracy in urban, semi-urban, and vehicle-based environments.
Key Technologies Behind the Reference Design
Multi-Band GNSS Reception
The reference design supports GPS, Galileo, GLONASS, and BeiDou constellations across multiple GNSS bands. Antenna options are available for L1/L5, L1/L2, and L1/L2/L5 applications.
Multi-Element GNSS Arrays
CRPA systems use multiple antenna elements to create spatial diversity. A four-element array can theoretically support up to three independent nulls, enabling suppression of multiple interference sources simultaneously.
Array Beamforming
Beamforming allows the system to enhance reception of desired GNSS satellite signals by electronically shaping the array response.
Null Steering
Null steering creates directional areas of reduced sensitivity toward jamming and spoofing sources, improving signal integrity.
Advanced RF Isolation
Maintaining isolation between antenna elements is critical to array performance. Techniques such as via fences and neutralization lines can significantly reduce element-to-element coupling.
GNSS Front-End Modules
The reference design incorporates the Taoglas TFM.110A multi-band GNSS front-end module to support array development and evaluation.
Start Building a More Resilient GNSS System
GNSS resilience is becoming increasingly important as jamming, spoofing, interference, and multipath create new challenges for positioning and timing systems. Engineers need a practical way to evaluate CRPA architectures without starting every design from scratch.
The Taoglas CRPA Reference Design provides a flexible foundation for developing and evaluating resilient GNSS systems. Choose the frequency configuration that best matches your requirements and download the complete design package, with reference design files for all three PCB sizes: 110 mm, 150 mm, and 170 mm.
Reference Design Architecture
L1 / L2 CRPA Reference Design
Datasheets
Explore the specifications and performance of each available PCB size:
110 mm
150 mm
170 mm
Design Files
Download the complete L1/L2 reference design package for all three PCB sizes: 110 mm, 150 mm and 170 mm. One download includes the 3D models, Altium-format PCB design files and 2D PCB drawings.
L1 / L5 CRPA Reference Design
Datasheets
Explore the specifications and performance of each available PCB size:
110 mm
150 mm
170 mm
Design Files
Download the complete L1/L5 reference design package for all three PCB sizes: 110 mm, 150 mm and 170 mm. One download includes the 3D models, Altium-format PCB design files and 2D PCB drawings.
L1 / L2 / L5 CRPA Reference Design
Datasheets
Explore the specifications and performance of each available PCB size:
110 mm
150 mm
170 mm
Design Files
Download the complete L1/L2/L5 reference design package for all three PCB sizes: 110 mm, 150 mm and 170 mm. One download includes the 3D models, Altium-format PCB design files and 2D PCB drawings.
