Ipad can't detect wireless network?

My iPad can't detect and connect to my wireless network. Other devices were able to connect to it so I decided to do the following:
1. Changed WiFi Password - no go
2. Changed security encryption to WEP/WPA/WPA2/WPA+WPA2 - no go
3. Removed the wireless password entirely - no go
4. Changed SSID - no go
5. Power cycled both the router and my iPad - no
6. Reset the router and redid steps 1-4 - no go
7. Reset settings on the iPad

During these attempts, all other devices seem to connect to my network so I'm absolutely sure it's my iPad. However when I went at our local restaurant the bloody thing was able to connect to the resto's wifi so I'm not sure where to go from here. Help? The router only broadcasts 2.4ghz.
Added (1). Important note: the ipad used to connect to my wifi

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