Implant Antenna Layout for Wireless Power in Compact Implants
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Solution Overview
Problem
Implantable devices inserted into the human body face challenges in minimizing volume while efficiently receiving wireless power and transmitting stimulation signals, due to the need for both electrodes and coils, which often results in suboptimal space arrangement and reduced transmission efficiency.
Innovation Solution
The implantable apparatus incorporates an antenna structure that encloses a conductor case, with ferrite reducing surface current interference and an insulator case for robust fixation, allowing for efficient power reception and signal transmission while minimizing volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both electrodes and coils are included in the implantable device, then wireless power reception and signal transmission functions are achieved, but the device volume increases and space arrangement becomes suboptimal
Solution Approach 1:
The patent combines the coil structure and electrode structure into a single integrated antenna, where the antenna serves dual purposes: receiving wireless power through its coil function and transmitting stimulation signals through its electrode function. This merging eliminates the need for separate coils and electrodes, thereby reducing device volume while maintaining both functionalities.
Solution Approach 2:
The antenna is designed as a multi-functional component that performs both wireless power reception and electrical stimulation signal transmission. By making the antenna universal, the device achieves adaptability for multiple functions without requiring additional dedicated components, thus optimizing space utilization and minimizing overall device volume.
2Adaptability or versatility
If both coils and electrodes are included in the implantable device, then wireless power reception and signal transmission are enabled, but transmission efficiency is reduced
Solution Approach 1:
The integration of coil and electrode into a unified antenna structure eliminates the need for separate signal paths and reduces electromagnetic interference between independent components. This merging optimizes the transmission pathway, reducing energy loss and improving overall transmission efficiency for both power reception and signal transmission functions.
Solution Approach 2:
The multi-functional antenna optimizes energy utilization by employing a single efficient transmission medium for both wireless power reception and stimulation signal delivery. This universal approach reduces redundant energy consumption associated with maintaining separate coil and electrode systems, thereby improving transmission efficiency.
3Volume of moving object
If antenna is placed inside the conductor case, then space is optimized, but surface current interference occurs
Solution Approach 1:
The patent introduces ferrite material as an intermediary substance positioned between the antenna and the conductor case. This ferrite layer acts as a mediator that blocks or redirects surface currents generated by the conductor case, preventing them from interfering with the antenna's electromagnetic field. This allows the antenna to be placed close to or inside the conductor case structure without suffering from harmful surface current effects.
Solution Approach 2:
The use of ferrite, a composite magnetic material with specific electromagnetic properties, creates a protective interface between the conductive housing and the antenna. This composite material approach leverages the magnetic shielding properties of ferrite to eliminate surface current interference while maintaining compact device geometry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances power reception performance, maximizes transmission efficiency, and ensures robust connections between components, effectively addressing the space constraints and efficiency issues of conventional designs.
Implementation Method 1
power is wirelessly supplied to the implantable device from outside the body
Implementation Method 2
The implantable apparatus may include ferrite disposed between the conductor case and the antenna
Data Source
AI summary
Implantable apparatuses are provided, where the implantable apparatus includes a first electrode, a second electrode, an electrode signal transceiver connected to the first electrode and the second electrode, an antenna, a wireless power receiver connected to the antenna, and a conductor case configured to protect the electrode signal transceiver and the wireless power receiver. The antenna be spaced apart from the conductor case and encloses the conductor case, and a plane in which the antenna is disposed is at a same level or at a higher level than a top surface of the conductor case.