The link is for cat6e cable, not coax. Also, the capacitance goes down to zero as r → R in the coaxial cable model, and the capacitance appears to increase logarithmically with wire radius for single wire or two parallel wires, with the logarithmic decrease being in distance between wires.
The link is for cat6e cable, not coax. Also, the capacitance goes down to zero as r → R in the coaxial cable model, and the capacitance appears to increase logarithmically with wire radius for single wire or two parallel wires, with the logarithmic decrease being in distance between wires.