The antenna has very low radiation resistance (less than one ohm) and will rarely be utilized for transmitting.
A matching transformer should be inserted between any such low-impedance transmission line and the higher 470 ohm impedance of the antenna.
This high-frequency resistance may vary over a wide range (from 0.1 ohm to 10 k in some cases; the useful range is smaller, though).
The 1893 system had three base units: the international ampere, the international ohm and the international volt.
Electron mobility measurements surpassing one million correspond to a sheet resistance of one ohm per square -- two orders of magnitude lower than in two-dimensional graphene.
These probes are also called resistive divider probes, since a 50 ohm transmission line presents a purely resistive load.
Impedances are 75 ohm single-ended, and 150 ohm differential.
The definition of the ohm unit was revised several times.