What is the purpose of dummy loads in EMFR system testing?

• A. Used to dissipate heat from the transmitter.
• B. Used to calibrate measurement devices during testing.
• C. Used to cool the antenna array.
• D. Used to absorb EMF energy during system testing.

Answer: (D)

Dummy loads provide a safe, predictable way to receive RF power without radiating it into the environment. In EMFR system testing, you want the transmitter to see a known impedance and to convert the energy it would normally emit into heat inside the load. This absorption stops reflections back into the transmitter, which could cause damage or skew measurements, and it lets you test and tune the system under controlled, repeatable conditions. The load is designed to match the system impedance (usually 50 ohms) so there are minimal reflections and a stable reference for measurements. Absorbing EMF energy during testing is the core function, and while that energy is dissipated as heat, the goal is to prevent radiation and reflections, not primarily to cool the transmitter or to calibrate instruments.