RFHunter® is a passive Radio-Frequency (RF) direction-finding and monitoring system that provides signal detection and analysis, emitter direction finding, and geolocation capabilities. The system is lightweight, compact and easily deployable, designed for highly mobile but extremely accurate localisation of radio frequency emissions. It can be quickly deployed in a wide range of operational environments to provide real-time passive situational awareness to diverse tactical defence and security operations, either as a standalone tactical sensor or integrated with a wide range of Electronic Warfare platforms, command-and-control systems, and Battle Management Systems (BMS), enabling coordinated operations and enhanced situational awareness.

The operation of the direction-finding (DF) system is based on the accurate determination of the direction from which incoming radio signals originate. The DF antenna passively receives radio signals and, by analysing the phase and amplitude differences between the antenna elements, determines the direction of the signal source, commonly referred to as the signal bearing. A single bearing measurement indicates the direction of an emitter but does not provide its exact location. To geolocate an emitter, bearing measurements from two or more physically separated positions are combined through triangulation.

The operation of the system is done through the RFHunter® Command and Control (C2) application which runs on a ruggedised tablet and provides the operator’s primary interface for mission planning, spectrum monitoring, data management, direction-finding operations and system configuration. The results are displayed graphically and numerically on the C2 application, enabling the operator to detect, analyse, and hear the signals, and identify the bearing and geolocation of the detected signal emitters.

These system capabilities enable a broad spectrum of applications that enhance situational awareness across defence, law enforcement, and security operations, including the detection, analysis, and geolocation of communication emitters, as well as the tracking and identification of transmitting crewed and uncrewed platforms, while its high portability, precision, and real-time performance make it a mission-critical asset for threat identification, spectrum dominance, and rapid operational response across the electromagnetic environment.