Doppler’s Radio Direction Finders

Established in 1981, Doppler Systems designs and manufactures fixed site and mobile radio direction finders and direction finding systems. We provide radio direction finding 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.

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

Our Mission

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 hardware and software needs. Thank you for choosing Doppler Systems, LLC!


Doppler Systems Blog

FCC Selects Doppler Systems

The FCC has selected Doppler Systems to furnish a suite of fixed site radio direction finders.  These fixed site direction finders are designed for quick setup and disassembly, allowing the FCC to rapidly move them Read more…

Support for the ICOM R30

We are very excited to announce the addition of the ICOM R30 to our receiver line up. The ICOM R30 is a compact and affordable receiver with the added bonus of a built in GPS. Read more…

Get in Touch

Contact our office

Doug Havenhill / Doppler Systems LLC

37202 N Bloody Basin Rd, Carefree, AZ 85377, USA

Give us a call

Tel: (480) 488-9755 / Fax: (480) 488-1295

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