# DataSet Structure: Load

Table 1. Required properties for loads.
Property name Property type Description
Frequency Axes Every loads DataSet requires a valid frequency axis. (Hz)
Current Quantities Currents are complex values that are measured in Ampere. (A)
Power Quantities The rate at which energy is expended. This is equal to the current times the voltage and is measured in Watts, which is a complex value. (W)
Impedance Quantities The total opposition to current flow and the ratio of the voltage to the current. It is measured using the complex value Ohm. ( $\Omega$ )
Voltage Quantities The potential difference over the port which is a complex value measured in Volts. (V)