WIFI connectivity problems with IPAD 2 since IOS 6.0.1

Since last month I have problems with the signal strength of my WIFI connection with my IPAD 2. My IPHONE 4 doesn't have any problems at all?

I rebooted my IPAD 1000 times, installed latest firmware on router, resetted my IPAD and I haven't got any clue anymore how to solve this annoying issue.

Please help....

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