Patent ID: 8565891
Filing Date: 2013-10-22
Classification: A61N,H01Q

Abstract:
1. A wireless implantable medical device comprising: a device housing; at least one radio frequency circuit for radio frequency communication of a monitoring signal with an external unit; at least one antenna; at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; and a dielectric compartment that encompasses at least a portion of said at least one antenna and at least a portion of at least one therapy-lead; said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°, and at least two of the angles between adjacent sections are less than approximately 115°; said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve to minimize an inductive coiling effect; wherein said at least two angles are smaller than 180°; and the at least one therapy-lead comes out from the device housing via feedthroughs into a region covered by the dielectric compartment.