Design for a source-agile automatic direction finder (ADF)

Harley Myler

doi:10.1117/12.2176429

21 May 2015 Design for a source-agile automatic direction finder (ADF)

Harley Myler

Proceedings Volume 9474, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIV; 947418 (2015) https://doi.org/10.1117/12.2176429
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

The design is intended for aircraft although any vehicle or even a man-mobile system could use the concept. An automatically reconfigurable antenna using MEMS RF switches is driven to seek signals consistent with the current location of the system. The antenna feeds a Software Defined Radio (SDR) that scans for signals and when a signal is found, it is identified and then the azimuth to the signal is used, along with a signal strength parameter, to confirm the location of the system. This is an extension of the now obsolete Automatic Direction Finder (ADF) aircraft navigation tool that used AM broadcast non-directional beacons (NDB), many of which are still in service. The current system can access any radio signal within the limits of the reconfigurable antenna and the SDR.

Citation Download Citation

Harley Myler "Design for a source-agile automatic direction finder (ADF)", Proc. SPIE 9474, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIV, 947418 (21 May 2015); https://doi.org/10.1117/12.2176429

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