What do you mean by cable specifications? This is the cable I got but there a definitely way better ones lol. Also if you don’t need that long of a cable it’s definitely better the shorter it is. As far as the antenna it just depends on your area what would be best for you! If you just search helium miner antenna they will all come up on Amazon

10m 33ft Cable RP-SMA Coaxial... https://www.amazon.com/dp/B07TMP85H9?ref=ppx_pop_mob_ap_share

these are meant for wifi antenna but maby they will work on the vive antenna. I dont own one so i can't test it