3D Spiral Antenna for Implantable Medical Device Header
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Solution Overview
Problem
Implantable medical devices face challenges in wireless communication due to limited space for antennas, which restricts antenna size and performance, affecting RF communication range and reliability.
Innovation Solution
Designing antennas with three-dimensional shapes such as rectangular cuboid, elliptic cylinder, or elongated prisms that occupy more volume within the limited header space, increasing antenna gain and bandwidth by maximizing the available space for better RF communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna size is increased to improve RF communication range and reliability, then antenna gain and bandwidth are improved, but the available space in the implantable medical device header is limited
Solution Approach 1:
The patent transitions from conventional two-dimensional planar antenna designs to three-dimensional volumetric antenna structures. By utilizing the third dimension (depth) within the header cavity, the antenna occupies greater volume without increasing the device's external footprint. This dimensional transition enables improved RF communication performance while maintaining compact implantable form factors.
Solution Approach 2:
The antenna is nested within the header cavity, utilizing the internal three-dimensional space of the header structure. The antenna design fits within the header's internal volume, effectively using the header as a housing for the antenna element. This nesting approach maximizes the use of available space within the implantable device without increasing overall device dimensions.
2Reliability
If conventional two-dimensional antenna designs are used, then manufacturing is simpler, but antenna gain and bandwidth are limited
Solution Approach 1:
The patent moves from planar two-dimensional antenna geometries to three-dimensional volumetric structures. This dimensional enhancement provides additional degrees of freedom for optimizing antenna performance parameters such as gain and bandwidth. The three-dimensional configuration allows for improved radiation patterns and impedance matching while maintaining compatibility with standard manufacturing processes.
3Reliability
If maximum header space is occupied by the antenna, then antenna gain increases, but space for other components or lead connections is reduced
Solution Approach 1:
The antenna design concentrates its volumetric occupancy in specific regions of the header cavity where it provides the greatest performance benefit. By strategically positioning the antenna elements and optimizing their three-dimensional configuration, the design maximizes antenna gain in critical areas while leaving other portions of the header available for lead connections and other components. This localized optimization approach balances performance requirements with structural requirements.
Data Source
AI summary
In an embodiment, an antenna for a medical device, e.g., an implantable medical device (IMD), comprises an electrically conductive wire that spirals to form a three-dimensional shape of a rectangular cuboid. In another embodiment, the antenna comprises an electrically conductive wire that spirals to form a three-dimensional shape of an elliptical cylinder, an oval cylinder, an elongated pentagonal prism, an elongated hexagonal prism, or some other shape where the longitudinal diameter of the antenna is greater than the lateral diameter of the antenna. The antennas are sized to fit within a portion of a header of the medical device. Such antennas are designed to provide increased antenna gain and antenna bandwidth.