A medical device comprising an external unit comprising an electronic unit operationally coupled to a transmitter coil that is configured transmit power and/ or data signal over a wireless transcutaneous link, a coil unit comprising a loop structure with the transmitter coil being wound around and along at least a part of length of the loop structure, a fixation unit configured to attach the loop structure to a user's body i) proximal to an implantable receiver coil that is configured to be implanted within a body part, and ii) around a body part of the user such that a part of the body part is positioned in a hollow section of the loop structure; and an implantable unit comprising the implantable receiver coil configured to receive the power and/ or data signal over the wireless transcutaneous link, a processing unit configured to i) process the received data signal to control functionalities of at least one of the components of the implantable unit, and/ or ii) utilize the received power for operation of at least one of the components of the implantable unit, wherein the wireless transcutaneous link comprises a coupling between the transmitter coil and the receiver coil, and when the loop structure is attached using the fixation unit, at least a substantial number of magnetic field lines generated in response to excitation of the transmitter coil passes through the implantable receiver coil. an external unit comprising an electronic unit operationally coupled to a transmitter coil that is configured transmit power and/ or data signal over a wireless transcutaneous link, a coil unit comprising a loop structure with the transmitter coil being wound around and along at least a part of length of the loop structure, a fixation unit configured to attach the loop structure to a user's body i) proximal to an implantable receiver coil that is configured to be implanted within a body part, and ii) around a body part of the user such that a part of the body part is positioned in a hollow section of the loop structure; and an electronic unit operationally coupled to a transmitter coil that is configured transmit power and/ or data signal over a wireless transcutaneous link, a coil unit comprising a loop structure with the transmitter coil being wound around and along at least a part of length of the loop structure, a fixation unit configured to attach the loop structure to a user's body i) proximal to an implantable receiver coil that is configured to be implanted within a body part, and ii) around a body part of the user such that a part of the body part is positioned in a hollow section of the loop structure; and an implantable unit comprising the implantable receiver coil configured to receive the power and/ or data signal over the wireless transcutaneous link, a processing unit configured to i) process the received data signal to control functionalities of at least one of the components of the implantable unit, and/ or ii) utilize the received power for operation of at least one of the components of the implantable unit, wherein the wireless transcutaneous link comprises a coupling between the transmitter coil and the receiver coil, and when the loop structure is attached using the fixation unit, at least a substantial number of magnetic field lines generated in response to excitation of the transmitter coil passes through the implantable receiver coil. the implantable receiver coil configured to receive the power and/ or data signal over the wireless transcutaneous link, a processing unit configured to i) process the received data signal to control functionalities of at least one of the components of the implantable unit, and/ or ii) utilize the received power for operation of at least one of the components of the implantable unit, wherein <EOS>