Patent ID: 8903497

Claim:
An implantable medical device, comprising: a housing having an interior surface having a generally tubular cross-section with a longitudinal axis, said housing having a lateral portion of a segment of said tubular cross-section along said longitudinal axis; an antenna within the housing, the antenna comprising: a bobbin within the housing, the bobbin having a first side and a second side opposite said first side, wherein the first side is nearer to the interior surface of said housing than that of the second side; and a coil wound around said bobbin, wherein said wound coil defines a winding axis extending from the first side of the bobbin to the second side of the bobbin and orthogonal to said longitudinal axis of said tubular cross-section, said coil having a greater number of complete turns proximate said second side of said bobbin than proximate said first side of said bobbin, with said coil having a cross-sectional shape selected for a space between said bobbin and said interior of said housing in said lateral portion of said segment of said tubular cross-section along said longitudinal axis of said housing.