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Doppler Systems LLC

Radio Direction Finders and Direction Finding Systems

Doppler Systems Home Page

Established in 1981, Doppler Systems designs and manufactures radio direction finding equipment and software for government, commercial, and amateur users. Our direction finders are used throughout the world in a large number of applications including

  • locating unwanted interference
  • finding nefarious individuals
  • finding stuck transmitters
  • locating boats and aircraft
  • stolen vehicle recovery
  • tracking the path of a vehicle
  • tracking beacon transmitters

We offer fixed site and mobile direction finders for 100 - 1000 MHz as well as fixed site direction finders for HF. Our direction finders are available in turn key configurations packaged for easy transport and set up or as components for customers who want to customize their direction finder.   Software furnished with our direction finders provides simple homing functions as well as map based geolocation of transmitters using mulitple line-of-site measurements.  Multiple fixed site and mobile direction finders can be networked together to provide real time geolocation of RF sources.

Contact us with your radio direction finding requirements and we will help you accomplish your mission.