What does a dummy load consist of?

A dummy load primarily consists of a non-inductive resistor mounted on a heat sink. This setup provides a means to safely dissipate radio frequency (RF) energy by converting it into heat, appearing as a load to the transmitter without radiating signals into the air.

The non-inductive nature of the resistor is crucial because it prevents the formation of standing waves in the test setup, ensuring that the characteristics of the transmission line can be analyzed without interference. The heat sink is essential for managing the heat generated by the resistor when power is applied, allowing the dummy load to handle significant power levels without damage or performance degradation.

While other configurations appear in specific applications, such as using various kinds of reactance for different impedance matching scenarios, the standard dummy load as described ensures safe operation and accurate testing of RF equipment.