Which USB hub connect with iPad mini

Why? What are you trying to do by using a USB hub?

iPad doesn't officially support connecting accessories like USB Hubs and Dongles etc!

If you are just trying to expand the USB ports on your computer you should be fine as long as you use a powered USB hub with it's own power supply. Non powered hubs must share the power between it's ports from the one it is connected to on the computer. As a result many higher powered devices will not work with a hub unless it is powered with it's own power supply. The iPad mini will charge using pretty much any powered USB hub although you would need a higher powered hub for a full size iPad.