A method and system for intelligently directing output boost capabilities of wind turbine generators operating together in a wind plant has been provided. In an embodiment, the protection sheet comprises an adhesive coated nonwoven material. The member is arranged on one side of the vibrating object and the microwave receiver is arranged on the other side thereof. An outlet end of the bypass line may be connected to an upper portion of the accumulator. The step attenuator is used to prevent a reduction in frequency range caused by use of MOS transistors and reduce attenuation of signal power and frequency band by the MOS transistors, thereby obtaining a low attenuation value and reducing input and output mismatch.