Fixed Site Direction Finders

At Doppler Systems, LLC, we offer fixed site radio direction finders covering frequency ranges from 115 – 1000 MHz (VHF/UHF/THF).   These systems utilize the same 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. In addition, when networking multiple sites it enables geolocation of the RF emitter.

VHF/UHF/THF Direction Finders
VHF/UHF/THF Direction Finder

Doppler Systems also carries a high frequency radio direction finder. The HF direction finder utilizes six loop antennas with half wavelength spacing and a standard AM receiver. You can operate both VHF/UHF/THF and HF direction finders on site or remotely.

HF Direction Finders
HF Direction Finder