A wind turbine with a clearance determination device

A wind turbine comprising:

• a tower;
• a nacelle coupled to the tower;
• a wind rotor arranged at the nacelle and comprising at least one blade and
• a clearance determination device to determine a distance between the tower and the at least one blade the clearance measuring device comprising:
• a transmitter configured to transmit an electromagnetic signal,
• a receiver configured to directly receive the signal transmitted by the transmitter, and
• a processing unit configured to determine the distance based on the transmission and the direct reception of the electromagnetic signal;
• wherein one of the transmitter and the receiver is arranged at the blade and the other one is arranged at the tower,
• wherein the transmitter and/or the receiver comprises a leaky feeder and
• wherein the transmitter and the receiver are synchronized.