Omnidirectional antenna for wireless communication with implanted medical devices
First Claim
1. In an apparatus for transmitting a radio frequency signal to activate a device implanted in an animal, an antenna assembly to which the radio frequency signal is applied and which has a substantially planar structure, the antenna assembly comprising a first antenna, a second antenna and a third antenna stacked on top of one another, wherein the first antenna produces a first electromagnetic field in a first direction, the second antenna produces a second electromagnetic field in a second direction which is substantially orthogonal to the first direction, and the third antenna produces a third electromagnetic field in a third direction which is substantially orthogonal to the first direction and the second direction.
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Accused Products
Abstract
Medical devices implanted in a patient can be activated and powered by an RF signal. Unless the medical device is properly oriented with respect to the transmitting antennas enough signal energy may not be received to power that device. However, optimum orientation can not be assured due to constraints on the implantation position. The present transmitting antenna is flat and omnidirectional thereby eliminating the need to properly orient the implanted medical device.
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Citations
29 Claims
- 1. In an apparatus for transmitting a radio frequency signal to activate a device implanted in an animal, an antenna assembly to which the radio frequency signal is applied and which has a substantially planar structure, the antenna assembly comprising a first antenna, a second antenna and a third antenna stacked on top of one another, wherein the first antenna produces a first electromagnetic field in a first direction, the second antenna produces a second electromagnetic field in a second direction which is substantially orthogonal to the first direction, and the third antenna produces a third electromagnetic field in a third direction which is substantially orthogonal to the first direction and the second direction.
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13. In apparatus for transmitting a radio frequency signal to a device implanted in an animal, an antenna assembly comprising:
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a first antenna to which the radio frequency signal is applied to activate the medical device is applied and having a first coil section on one side of a first axis of symmetry and a second coil section located on another side of the first axis of symmetry;
a second antenna to which the radio frequency signal is applied to activate the medical device and having a third coil section on one side of a second axis of symmetry and a fourth coil section located on another side of the second axis of symmetry, wherein the second axis of symmetry is orthogonal to the first axis of symmetry; and
a third antenna to which the radio frequency signal is applied to activate the medical device and having a conductive loop a gap. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. In an apparatus for transmitting a radio frequency signal to a device implanted in an animal, an antenna arrangement comprising:
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a first antenna, a second antenna, and a third antenna each having a planar structure with one of the first, second, and third antennas located between the other two antennas;
each of the first antenna and the second antenna having a first lobe extending to one side of an axis and spaced apart first and second ends, a second lobe having spaced apart third and fourth ends and extending within the first lobe with the third end adjacent the first end, a third lobe extending to an opposite side of the first axis and having spaced apart fifth and sixth ends, a fourth lobe having spaced apart seventh and eighth ends and extending to the opposite side within the third lobe with the seventh end adjacent the fifth end, the first end of the first lobe is connected to the fourth end of the second lobe, the second end connected to a node between the first end of the first lobe and the fifth end of the third lobe and separated there from, the sixth end is connected to the node, and the third end of the second lobe is connected to the seventh end of the fourth lobe;
wherein the axis of the first antenna is orthogonal to the axis of the second antenna; and
the third antenna having a first annular conductor with ninth and tenth ends with a gap there between, and a second annular conductor inside the first annular conductor and having eleventh and twelfth ends with another gap there between, wherein the tenth end is connected the eleventh end. - View Dependent Claims (27, 28, 29)
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Specification