Take along TV??

We still use an old fashioned antennae at home and it's not working well any more. Our motor home also just has the crank up antennae. My question is, is their a system you can use at home and take along on RV trips for TV reception on the road. I suppose a dish or satellite.
Something big and awkward that takes up much space is out of the question. Also the TV is the old analog requiring a converter box so would I have to replace it?