Is it okay to exceed the frequency range of my RF load?

In general, you should avoid exceeding the frequency range of your RF load. There are 2 primary reasons for this:

1. Exceeding the frequency range will not allow the load to dissipate its rated power.
   Like antennas, RF loads are tuned to match the characteristics of their expected input signal to prevent reflections i.e. minimize VSWR. Exceeding the frequency range can increase VSWR and reflect more power back out of the load.
2. Localized heating can damage the internals of your RF load.
   As frequency increases, the skin effect concentrates current density on the surface of a conductor, the internal resistor in the case of a load. This increased current density leads to an increase in effective resistance, causing more heat to be generated and concentrated on the surface of the internal resistor. Over time, this localized heating can degrade performance and damage your load.