Automatic direction-finding antenna pinpoints rogue transmissions
Recent drone activity at Gatwick and Heathrow airports has served to highlight the disruption that can be caused when illicit transmissions continue unchecked, and the new ADFA 1 antenna could be used as part of a solution to help security and communications professionals deal with such situations as quickly as possible. The device is also suitable for telecommunication or defence applications. The antenna covers the frequency range 200MHz to 2.7GHz and is designed for use with the company’s SignalShark portable real-time spectrum analyser. There is no need for a laptop computer. By means of a strong magnetic mount, the antenna can be attached to the roof of any normal vehicle to enable a series of random bearings to be taken in the suspected area. Each bearing cycle achieves a typical accuracy of 1 degree and takes just 1.2 milliseconds, for reliable measurements even for pulsed signals or transmissions of very short duration.
At the heart of the ADFA 1 is an array of nine antenna elements around an omnidirectional reference element. The antenna works on the principle of measuring the phase difference between the nine elements and the central reference. It comes housed in a radome measuring 480x219mm sealed to IP55.
Link Microtek Ltd – www.linkmicrotek.com
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