Completely wireless modem (no router)- is it possible?

I am a product designer looking into potential concepts but need a better understanding of the some of the electronics and components before I can go ahead with any of them.

In theory, is it possible to have a completely wireless modem? I have come across wireless modem+router combos but for this particular design idea I need for the modem to be a separate part and supply to ONLY ONE other device, but rather than it being wired, like in most modems, it should supply the signal WIRELESSLY. I apologise if I'm missing something very blatant here, I'm new to this side. :) Any help would be extremely appreciated. :)

submitted by /u/afloatinspace
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