Layered Hearing Aid Antenna Module for Balanced Bilateral Radiation
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Solution Overview
Problem
Bone anchored hearing aid devices face challenges in achieving optimal antenna performance due to the close arrangement of components in a restricted space, limiting antenna bandwidth and radiation efficiency, and exhibiting significant performance differences between left and right side placements.
Innovation Solution
A hearing aid device with an antenna module comprising electrically conductive layers forming a layered structure, where user input units and signal lines are integrated within the antenna module, allowing for electromagnetic shielding and adjustable radiation and bandwidth properties through the distance between antenna connections and the main ground plane, enabling different configurations for left and right side placements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If components are placed extremely close to each other in a bone anchored hearing aid, then the device can be miniaturized and integrated in limited space, but the antenna bandwidth and radiation efficiency are limited
Solution Approach 1:
The patent transitions from planar antenna design to a three-dimensional folded antenna structure. The antenna is folded back on itself multiple times, utilizing the third dimension (vertical space) to achieve a longer effective radiating length within a compact footprint. This dimensional transformation allows the antenna to maintain adequate bandwidth and radiation efficiency while fitting within the constrained volume of the bone-anchored hearing aid device.
Solution Approach 2:
The antenna structure is nested within the device housing and other components. The folded antenna segments are arranged to fit within the available internal volume, with each segment nested or adjacent to other device components such as the battery, processor, and vibration motor. This nesting approach maximizes space utilization while preserving antenna performance.
2Volume of moving object
If components are placed extremely close to each other in a bone anchored hearing aid, then the device can be miniaturized and integrated in limited space, but the antenna radiation efficiency is limited
Solution Approach 1:
By folding the antenna in three dimensions, the effective radiating length is increased without proportionally increasing the device volume. This allows the antenna to achieve better radiation efficiency while maintaining miniaturization, as the folded structure creates multiple radiating segments that can operate effectively within the limited space.
Solution Approach 2:
The antenna is divided into multiple folded segments, each contributing to the overall radiation pattern. This segmentation allows for optimized current distribution across multiple sections, improving radiation efficiency while keeping the total device volume small. The segmented structure also provides flexibility in arranging components around the antenna.
3Volume of moving object
If components are placed extremely close to each other in a bone anchored hearing aid, then the device can be miniaturized and integrated in limited space, but significant performance differences occur between left and right side placements
Solution Approach 1:
The folded antenna structure is designed with asymmetric folding patterns that can be configured differently for left and right ear applications. The antenna includes feed points and grounding points positioned to optimize performance for each specific placement, allowing the same basic folded structure to adapt to bilateral use while maintaining consistent performance characteristics.
Solution Approach 2:
The antenna design incorporates adjustable or reconfigurable elements that can be optimized for different mounting orientations. The folded segments can be arranged to account for the different anatomical positions and orientations of left and right ears, ensuring consistent performance across bilateral placements despite the asymmetric body 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 solution enables compact integration of user input units and antenna components without sacrificing performance, providing uniform radiation efficiency and adjustable bandwidth, addressing the limitations of component proximity and side-specific performance variations.
Implementation Method 1
The layered structure allows an electromagnetic shielding of the signal lines from the antenna module
Data Source
AI summary
A hearing aid device includes at least one user input unit for controlling an operation mode of the hearing aid device, at least one signal line connecting the at least one user input unit with a control unit for controlling the hearing aid device, and an antenna module comprising at least two electrically conductive and electrically connectable layers forming a layered structure. The at least one user input unit is arranged at one of the layers of the antenna module, and the at least one signal line is provided at an inner surface of one of the layers facing one other layer.