This antenna, although claims 2.5 dBi, is no better, even worst, than stock antenna supplied with the DVB-T Dongle. These are actually meant for Cell Phone frequencies, but sold as for ADS-B frequency 1090 MHz.
If you want a good outdoor antenna, purchase Flightaware 26 inch 5.5 dBi antenna from Amazon for $43.95 + Free Shipping .
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Alternatively you can make yourself an antenna if you are interested in DIY.
NOTE: Those who dont want to make a DIY antenna, can order Flightaware’s antenna from Amazon
http://www.amazon.com/gp/product/B00WZL6WPO
STARTER
When DVB-T Dongle is purchased, a whip antenna is supplied with it. Every beginner uses this whip in his starter setup.
Improve the performance of this whip antenna by three simple steps given below:
(1) Whip is too long for 1090 MHz. Cut it to 67mm.
(2) Magnetic base provides an insufficient ground-plane. Enlarge ground-plane by placing the whip …
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