Implantable medical device with integrated antenna system

A cochlear implant comprising:

• one or more external devices comprising an external sound processor unit to be worn on the body of a recipient;
• and
• an implantable medical device having an implantable component configured to at least one of receive external data, generate internal data, and receive power signals, comprising:
• an implantable antenna for transmitting and receiving external radio frequency (RF) signals to and from one or more devices positionable external a patient's body;
• and
• a reciprocal frequency multiplexer-filter circuit configured to concurrently frequency-filter high- and low-frequency external RF signals received by said implantable antenna, and to concurrently frequency-multiplex common-mode high-frequency RF signals and differential-mode low-frequency RF signals to form high- and low-frequency external RF signals, respectively, for transmission to said one or more external devices via said implantable antenna, said common-mode high- and differential-mode low-frequency RF signals corresponding to said internal data generated by said implantable component.

A method of bidirectional wireless communication between an implantable medical device and an external device comprising:

• concurrently and multiplexedly communicating including:
• communicating unidirectionally from the external device to the implantable medical device over a first wireless link in a first RF band in the MI near-field using differential-mode signalling;
• and
• communicating unidirectionally from the implantable medical device to the external device over a second wireless link in a second RF band in the EM-field using common-mode signalling.

A hearing prosthesis comprising:

• an internal antenna for transmitting and receiving RF signals to and from one or more external devices;
• and
• a band diplexer, connected to the internal antenna, comprising:
• a first filter configured to filter for a differential-mode first signal to be at least one of transmitted and received in a first RF band, and a second filter configured to filter for a common-mode second signal to be at least one of transmitted and received in a second RF band, wherein the common-mode second RF band is higher in frequency than the differential-mode first RF band, the diplexer being configured to operate the first and second filters concurrently.