No such animal. Run a cable.
yeppers, mr phile. be nice if there WERE a handy-dandy xmitter, tho'. used to be something called a RABBIT that allowed non-coax connections to TVs in other parts of your house via a wire pair, very unobtrusive. I had one, lost the remote, darn.
just...don't buy superduper coax, eh? that de-luxe, gold-plated, oxygen-free coax and speaker wire....is a myth. any old coax of the correct length will do fine.
OR... mmcool could just, like, move the TV....<grin>