Is there a cheap component that turns a circuit on or off based on the presence of rf waves?

i need a switch type component for a device I'm working on that will use rf waves to flip a circuit from either the open or closed postion based on whether or not rf waves of a given frequency range are passing through it. is there anything like that? i was thinking maybe reed relay? is that what i need or is... show more i need a switch type component for a device I'm working on that will use rf waves to flip a circuit from either the open or closed postion based on whether or not rf waves of a given frequency range are passing through it. is there anything like that? i was thinking maybe reed relay? is that what i need or is it something different.
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