An orthopaedic implant comprising: a body portion for replacing a missing joint or bone, or for supporting a joint or bone within a patients body a slot antenna for effecting wireless communication between the implant and an external device, wherein the slot antenna comprises a first surface in which is arranged a slot for receiving and/or transmitting wireless communication signals wherein the slot antenna is comprised within the body portion, such that the slot is exposed to the environment outside of the implant.
