How to install high gain 22dbi anteena on routers

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Hello Friends,
I just bought 22DBi high gain antenna's.
I attached it to my Tenda N150 wifi router which has a detachable antenna,
Signal did not improve, i tested it on internal Dlink wifi card there it improved the signal strength.
then i tested it on different routers but no improvement,
Can anybody help in getting this high gain 22dbi anteena to work on routers.
 
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