The Device Finder is an antenna with a 7dBi gain over a 40 degree beam width. It is designed to help you track noise sources by focusing the bandwidth scan to what is in front of the antenna.

The antenna works by amplifying signals directly in front of it, while attenuating all other signals. You can see this in the Azimuth horizontal plot below. For example, signals to the left and right of the antenna (90 degrees from the centre) will experience an approximate -11dBi gain (ie. they will be attenuated by 11dBi). While this is a fairly good attenuation, it is not "perfect". You will still get some small amounts of side leakage showing up. In addition, the back lobe that you see in the plot will be partially mitigated by the laptop screen that you mount the antenna on.

Benefits

• Helps to pin-point the physical location of errant noise sources
• It makes the pin-pointing of the noise source faster
• Mounts on laptop screen, meaning you do not have to handle the unit while operating

Video

This video shows the Device Finder antenna working in a real life situation at Interop 2010 - Thanks to the guys at MetaGeek!

Specifications