Radio Direction Finders and Direction Finding Systems
The Doppler Radio Direction Finder
Established in 1981, Doppler Systems designs and manufactures fixed site and mobile radio direction finders and radio direction finding (RDF) systems. We provide RDF equipment and software for government, commercial, and amateur users. Because of our outstanding reputation, clients worldwide use our direction finders in many ways. For example, our direction finders aid in…
discovering unwanted interference
uncovering malicious intent
finding stuck transmitters
locating boats and aircraft
recovering stolen vehicles
tracking vehicle routes
pinpointing stolen cargo
Fixed Site and Mobile Direction Finders
In short, Doppler Systems offersfixed site and mobile direction finders for 100 – 1000 MHz. They are available in turn key configurations packaged for easy transport and assembly. In addition to our standard designs, clients can mix and match our components for a custom solution. We also provide software with simple homing functions and map-based transmitter geolocation. Furthermore, users can network multiple fixed site and mobile direction finders together to provide real-time geolocation of RF sources.
Above all, our mission is to help our customers so that they are happy with their Doppler direction finders. Please contact us and we will help you with your RDF hardware and software needs. Thank you for choosing Doppler Systems, LLC!
Recently, a customer questioned us on our direction finder’s bearing stability over temperature. Over the years we’ve made some significant improvements in our summing unit so we thought it would be a good time to Read more…
The availability of inexpensive transceivers has resulted in increased jamming of critical public service radio services. Utilizing Doppler Systems’ radio direction finders allows you track down interference and criminal jamming quickly, so you can get Read more…
Many times we’ve been asked why we use biconical antennas for our fixed site antennas. The short answer is that compared to a dipole the biconical antenna provides superior sensitivity over the entire bandwidth of Read more…