Control unit having a deployable antenna
A control unit for an implantable medical device includes a housing and electronics within the housing. The electronics control an RF emission from the control unit. An antenna is pivotably connected to the housing. The antenna is movable between a stowed position where RF emission from the antenna is prevented and a deployed position where RF emission from the antenna is permitted. To use the external control unit to effect communication between an external control unit and an implanted medical device, the user places the external control unit within electronic communication range of the implanted medical device. The control unit antenna is moved from the stowed position to a deployed position where RF emission from the antenna is permitted. RF waves are emitted from the antenna to establish communication between the external control unit and the implanted medical device.
1. A control unit for an implantable medical device comprising:
a housing;
electronics, for controlling an RF emission from the control unit, being disposed within said housing; and
an arc shaped antenna pivotably connected to said housing, said antenna being movable between a stowed position where RF emission from the antenna is prevented and a deployed position where RF emission from the antenna is permitted, in the stowed position the arc shaped antenna is both approximately coplanar with, and encircles the outer periphery of, the housing,
wherein the electronics are disposed on a pc board, the antenna defines an antenna plane, in the stowed position the antenna plane is approximately coplanar with a plane defined by the pc board, the antenna plane in the deployed position is not coplanar with the plane defined by the pc board.
2. The control unit of claim 1 , wherein the housing has a user interface, and the electronics control the user interface.
3. The control unit of claim 1 , wherein the housing is made of a material that shields the electronics from external RF waves.
4. The control unit of claim 3 , wherein the housing is made of plastic.
5. The control unit of claim 1 , wherein the antenna is a coaxial loop.
6. The control unit of claim 5 , wherein the antenna is disposed in a housing that permits the transmission of RF waves therethrough.
7. The control unit of claim 1 , wherein the pivotable connection between the antenna and the housing includes a switch electrically connected to the electronics to detect the position of the antenna.