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office (480) 488-9755
fax (480) 488-1295

Doppler Systems LLC

Radio Direction Finders and Direction Finding Systems

Doppler Radio Direction Finders and Direction Finding Equipment

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.

Fixed Site 115 - 1000 MHz Radio Direction Finder HF Radio Direction Finder 
VHF/UHF/THF Direction Finder HF Direction Finder