Fixed Site Direction Finders

Doppler Systems offers fixed site radio direction finders covering the frequency ranges 115 – 1000 MHz (VHF/UHF/THF).   Both systems utilize the same DF processor and software.  The VHF/UHF/THF direction finder uses an eight element antenna array and a standard narrow band FM receiver to achieve 1 degree of bearing measurement accuracy.  The HF direction finder utilizes six loop antennas with half wavelength spacing and a standard AM receiver.  Either system can be operated on site or remotely and networking multiple sites enables geolocation of the RF emitter.

VHF/UHF/THF Direction Finder
HF Direction Finder