[samste]

You can just get some solder type SMA conectors and some semi ridged coax and make one up try to keep it a multiple of 1/2 wave length long. For 5.8 that's a multiple of about 26mm as a wavelength is around 52. so either 26 long or 52 long or 78 long or 104 long etc
the shorter the better tho.

That's Good to Know, Thanks