Hearing aid with internal antenna

A hearing aid comprising an outer structure having a first end and an opposite second end, the outer structure being configured to be positioned at the ear of a user,

• a first substrate arranged in the outer structure,
• an input transducer arranged at the first substrate, the input transducer configured to provide a signal representing sound, wherein the first substrate further includes a conductive area being at least part of a radio frequency antenna, wherein the first substrate is arranged at the first end of the housing,
• a battery arranged in the outer structure at the second end of the outer structure,
• a second substrate arranged in the outer structure, the second substrate arranged at least partly in an area between the first substrate and the battery,
• a wireless interface arranged in the outer structure, the wireless interface configured to transmit and/or receive electromagnetic signals to/from the radio frequency antenna via a feed connected to the first substrate, the wireless interface configured to operate at a first operational frequency,
• the hearing aid further comprising a connector configured to connect to an external speaker unit device configured to be placed at least partly in an ear canal of the user, wherein at least one decoupling element configured to provide a dampening of electrical signals at the first operational frequency is arranged in an electrical path to/from the connector.