First ensure you are up to dated on the software..... settings, general, software update then
Erase the network that gives you problems with connectivity. Tap "Settings" and "Wi-Fi." Select the desired network and then tap "Forget this Network." This option erases the settings for this network, so you need to re-enter them. Reset the settings for all the networks on the iPad if the problem persists. Tap "Settings," "General" and "Reset." Tap "Reset Network Settings." Re-enter the configuration information for each network. Restart the iPad after renewing your IP address or resetting the Wi-Fi network settings. To restart the iPad, hold down the "Sleep/Wake" button. When the red slider appears, slide it to turn off the device. Hold the "Sleep/Wake" button again to turn on the iPad.
I needed to use all the above to resolve it, good luck