| 摘要 |
Disclosed is an improved medical implantable device having a conductive case into which a slot antenna is formed. The slot antenna preferably has a slot length which is one-half of the wavelength of the data being sent to or received from an external controller, although slot lengths smaller than these ideals values can also be used albeit with reduced efficiency. Slot lengths accommodatable by a given case can enable communications at frequencies suitable for medical telemetry. The slot is preferably filled with a hermetic dielectric material, and can be formed into different geometries, including non-linear geometries. When the slot antenna is provided in the implant's case, separate data antennas or coils are not needed, which reduces the implant's size. Additionally, the slot antenna reduces eddy current heating in the case, and promotes efficient data transfer in the near field that is not as susceptible to attenuation in the human body.
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