android phone/tablet connects to ubuntu through wireless router WITHOUT ethernet connection

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http://askubuntu.com – I would like to connect an android phone/tablet to my Ubuntu pc in my car. Having a spare router I though of making a local wireless network. All the info on the net is about turning the spare router into an access point of a existing Ethernet connection. In my case the spare router is not connected to the Ethernet wire but directly onto a network port on my pc. In my car I have mobile Ethernet, I have been able to share this connection through the router to broadcast internet to my android phone. I also have a wireless network card ( no master mode possible) to connect my ubuntu pc to wire (HowTos)