Inverted e antenna with parallel plate capacitor formed along an arm of the antenna for use with an implantable medical device

Patent metadata

Field	Value
Publication number	US-2016285158-A1
Application number	US-201615172957-A
Country	US
Kind code	A1
Filing date	Jun 3, 2016
Priority date	Jun 29, 2012
Publication date	Sep 29, 2016
Grant date	—

Abstract

The device includes radio frequency (RF) communication components installed within a case of the device and an antenna with an inverted E shape mounted within a header of the device. The antenna has three branches extending from a main arm: a capacitive branch connecting one end of the main arm to the case; an RF signal feed branch connecting a middle portion of the main arm to the internal RF components of the device via a feedthrough; and an inductive branch connecting the opposing (far) end of the main arm to the case to provide a shunt to ground.

First claim

What is claimed is:

1 . A method of fabrication of an implantable medical device for implant within a patient, the method comprising:
providing a case, wherein the case is adapted to contain pulse generating circuitry and radio frequency (RF) communication components; providing feedthrough components to electrically connect the pulse generating circuitry and the radio components to components exterior to the case; connecting connector components to respective feedthrough components, wherein the connector components are arranged in one or more columns defining a first end adapted for receiving one or more implantable leads and a second opposing end; fitting an inverted E-antenna over the connector components, wherein (i) the inverted E-antenna comprises a first branch including a capacitor, a second branch to provide an RF signal feed, a third branch to provide a shunt to ground, and an main arm connecting the first, second, and third branches, (ii) the fitting causes the inverted E-antenna to span at least a distance from the first end to the second opposing end defined by the connector components, and (iii) the first branch of the inverted E-antenna comprises a curved portion to dispose the capacitor of the third component to a side of one or more connector components at the first end adapted for receiving one or more implantable leads; and providing a header over the inverted E-antenna and the connector components, wherein the inverted E-antenna is disposed adjacent to an outer edge of the header.

2 . The method of claim 1 wherein the first branch comprises a first ribbon segment and a second ribbon segment, wherein the first ribbon segment is connected to the main arm.

3 . The method of claim 2 further comprising:
connecting the second ribbon segment to the case.

4 . The method of claim 2 wherein the first ribbon segment comprises a first plate component and the second ribbon segment comprises a second plate component.

5 . The method of claim 4 wherein the first and second plates are mechanically attached to each other with dielectric material disposed between the first and second plates to form the capacitor.

6 . The method of claim 5 wherein the dielectric material is a ceramic plate.

7 . The method of claim 2 wherein the second ribbon segment comprises first and second plate components and the first ribbon segment component comprises a third plate component disposed between the first and second plates to form the capacitor.

8 . The method of claim 1 wherein a major surface of the case defines a first plane and the capacitor of the first branch defines a second plane that is in a generally parallel plane relationship with the first plane.

9 . The method of claim 1 wherein the providing a header comprises providing a precast header structure.

10 . The method of claim 1 wherein the providing a header comprises providing epoxy material to form the header.

11 . The method of claim 1 further comprising:
connecting the second branch to the case at a first location adjacent to the second opposing end defined by the connector components; and
connecting the first branch to the case at a second location adjacent to the first end defined by the connector components, wherein the second branch is connected on a side of the connector components that is opposite to a side of the connector components where the capacitor of the first branch is located.

12 . The method of claim 1 wherein the implantable medical device is a cardiac rhythm management device.

13 . The device of claim 1 wherein the RF components include one or more of Medical Implant Communication Service (MICS) components and Medical Device Radiocommunications Service (MedRadio) components.

Assignees

• Pacesetter Inc

Inventors

• Meulmester Micah
• Imani Reza
• Lim Wisit
• Li Perry

Classifications

• A61N1/375

  Constructional arrangements, e.g. casings · CPC title

• A61N1/3962

  in combination with another heart therapy · CPC title

• A61N1/36521

  the parameter being derived from measurement of an electrical impedance · CPC title

• B29L2031/753

  Medical equipment; Accessories therefor (bloodbags, medical bags B29L2031/7148; artificial eyes B29L2011/0008) · CPC title

• H01Q1/22

  by structural association with other equipment or articles · CPC title