Overview
The DFH40 Direction Finding antenna is a robust, field-ready solution for precision monitoring and direction finding from 500MHz to 40GHz, offering flexibility and frequency breadth across the SHF and lower EHF frequency bands. Designed for tactical deployments, the DFH40 enables reliable real-time direction finding, signal interception, and emitter geolocation where traditional systems cannot operate.
Six high-performance spiral antennas with high-speed commutation and precise timing enable synchronized data correlation across multiple DF Heads and RFeye Nodes, delivering accurate geolocation of target signals using combined AoA and TDoA techniques.
LOBs can be overlaid onto a wide variety of maps, satellite images and 2D / 3D GIS datasets, to give a unique positional display showing source geolocation probabilities. All signal types in the range can be mapped, irrespective of signal power, bandwidth or frequency.
CRFS offers a selection of interchangeable DF Heads designed for use with Rapid Deployment Kits (RDKs), allowing users to build a toolkit suited to each mission.
At a glance
Frequency range
500MHz–40GHz
DF accuracy
<3° RMS typical
Rapid Deployment Kits (RDKs)
2m Rolatube; 2m, 6m or 10m BlueSky Mast system
Setup time
approximately 20 minutes
by 2 personnel
Weatherproof
IP67
Compatible Nodes
RFeye 100-8, 100-18,
100-18 Node Plus, 100-40
Power system
Bren-Tronics battery
+ solar panel
Case & transport
Rugged Pelicase for
all-weather use
Build your system
Select an RFeye Node
Choose your mast
View our range of Compact DF Heads
Add optional accessories
BROCHURE
Compact DF Head Systems
Ideal for COMINT, SIGINT, ESM, and ISR operations, the system supports both real-time missions and persistent monitoring in dynamic electromagnetic environments. With five interchangeable Compact DF Heads and three RDK configurations, users can tailor deployments to meet specific mission requirements—delivering unmatched operational flexibility.
Discover software
A comprehensive software suite to monitor, capture, analyze, geolocate, and record signals of interest.
RFeye Site
RFeye Site is a toolbox to monitor the spectrum in real-time and geolocate signals in complex RF environments.
RFeye DeepView
RFeye DeepView is a forensic signal analysis software solution offering a 100% probability of intercept.
