• doppler antenna

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
  • following beacons
  • pinpointing stolen cargo

Fixed Site and Mobile Direction Finders

In short, Doppler Systems offers fixed 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.

radio direction finder
Doppler’s direction finders can be paired with many products for custom solutions.

Our Mission

Our mission is to provide affordable professional quality radio direction finding equipment and systems with outstanding “customer first” service. Please contact us and we will help you with your RDF hardware and software needs. Thank you for choosing Doppler Systems, LLC!


Doppler Systems Blog

Buckie lifeboat utilizes Doppler RDF

All credit for this article goes to Alan Beresford (author) and the Grampian Online of HNMedia.co.uk. We received permission to post the article in full on our site. The original article can be found here. Training exercise Read more…

All Star Doppler Direction Finders

The California Office of Emergency Services (CAL OES) deployed mobile Doppler Systems radio direction finders at the 2022 Major League Baseball’s All Star Game. Communications are vital for large events like these where both intentional Read more…

Get in Touch

Contact our office

Doppler Systems LLC

University of Arizona Tech Park

9040 S. Rita Rd

Tucson, AZ 85747, USA

Give us a call

Tel: (480) 488-9755

Contact Us