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

Doppler Systems LLC

Radio Direction Finders and Direction Finding Systems

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