Digital grade coax such as CT100 or PF100 etc has a copper foil and copper braid.
Analouge satallite has an aluminium foil.
Older terrestrial has no foil, just a braid.
You get all flavours of the above in air-spaced and foam dielectric. Foam is used outdoors to prevent water ingress, and is less easily deformed when bending. Air spaced is for indoor use and is made because it is cheaper.
They make many cables for many purposes. They are all different for a reason
It annoys me when alarm guys use alarm cable for telephones, or DIYERS use telephone cable for alarms.