Mddf

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man portable digital direction finder project intro

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Mddf

  1. 1. Ministry of Defence Electronics, Logistics and Property Management Co. Multimission Radio Direction Finder Connector of DF antenna Goals of the project: Development of a ligthweight, man portable, radio direction finder equipment (RDF) which is able to determine the angle of arrival (AOA) of communication radio signals in VHF/UHF band. LCD display Radio unit DF processor unit Battery pack Control unit Keyboard Basic system segmentation and initial usage scenario: DF antenna Front panel Antenna set Ant. sig. proc. Receiver Bearing processor DF receiver Display and control Ant. must Sensor domain Processing domain Control domain In the next step GPS positioning and electronic compass heading elements were integrated into the dipole array based antenna head First prototype system: integrated DF receiver and monopol based 4 element DF antenna array on a tripod. Field measurements were carried out for testing and building the calibration database New generation of RDF receiver based on advanced digital signal processing technology Significant enhancements are signal processing and user interface Instead of alphanumeric LCD and push buttons graphical LCD display and touch screen is used as MMI in this generation of RDF receiver. New signal processing is able to handle 8 element antenna heads shown in pictures on the right. They are for VHF and UHF frequency bands. Basic technical parameters: 20-300MHz / 300-1200MHz (VHF/UHF) frequency range Full-function scanning and monitoring receiver Built-in Direction-Finding (DF) capability Full 360-degree direction coverage Automatic North calibration using integrated electronic compass Built-in GPS receiver for positioning and time synchronization Featured status and measurement acquisition and replay www.sagax . www.sagax.hu Size reduction of different models Lab measurements with phase splitter Sagax, Ltd. Sagax, Ltd. Haller u. 11-13. 1096 Budapest, HUNGARY

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