A quick google reveals that wind farms can cause the signal disruption.
Electromagnetic fields and marine organisms
"During the generation, transmission and utilisation of electromagnetic energy, the devices generate electromagnetic disturbance that can interfere with the normal operation of other systems.
Wind turbines can potentially disrupt electromagnetic signals used in telecommunications, navigation and radar services. The degree and nature of the interference will depend on:
The location of the wind turbine between receiver and transmitter.
Characteristics of the rotor blades.
Characteristics of receiver.
Signal frequency.
The radio wave propagation in the local atmosphere.
Interference can be produced by three elements of a wind turbine: Tower, rotating blades and generator. Tower and blades may obstruct, reflect or refract the electromagnetic waves."