Hearing Device Antenna Design for Compact Wireless Integration
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Solution Overview
Problem
Hearing devices face challenges in integrating wireless systems due to limited space, leading to inefficient antenna designs that are bulky and have reduced bandwidth, especially when increasing the number of electrically conducting elements.
Innovation Solution
The design incorporates a coupling element with multiple electrically conducting elements that serve as part of the antenna, utilizing decoupling elements like capacitors to minimize coupling losses and an internal antenna structure that guides current to a ground plane, eliminating the need for additional decouplers and maintaining bandwidth, especially in the 2.45 GHz to 5.5 GHz frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of electrically conducting elements in the antenna is increased, then the communication functionality is improved, but the bandwidth decreases due to decouplers connected to each element
Solution Approach 1:
The antenna is divided into multiple electrically conducting elements that can be independently connected to different electronic devices. Each element can serve different communication functions (e.g., Bluetooth, Wi-Fi, NFC) simultaneously without requiring individual decouplers, as they share a common connection path through the coupling element.
Solution Approach 2:
The coupling element serves multiple functions: it acts as both a mechanical connector between the first and second portions and as an electrical connector that provides a shared path for multiple antenna elements. This universal coupling structure eliminates the need for separate decouplers for each antenna element, preserving bandwidth while enabling multi-functionality.
2Adaptability or versatility
If the number of decouplers is increased to support more electrically conducting elements, then the communication versatility is improved, but the device size becomes more bulky
Solution Approach 1:
Multiple decoupling functions are merged into a single coupling element structure. The coupling element integrates the mechanical and electrical connection functions, providing a shared electrical path for multiple antenna elements without requiring individual decouplers for each element. This consolidation significantly reduces the overall device volume.
Solution Approach 2:
The coupling element is designed as a universal connector that handles multiple electrical signals simultaneously. It provides a common connection path that serves all antenna elements, eliminating the need for multiple specialized decoupler components and reducing the device footprint.
3Ease of operation
If wireless systems are integrated into hearing devices, then the convenience is improved, but the antenna efficiency and bandwidth are reduced due to limited space
Solution Approach 1:
The coupling element provides a flexible electrical connection that adapts to the spatial constraints within the hearing device. By using a dynamic coupling structure rather than rigid fixed connections, the antenna elements can maintain optimal electrical lengths and impedance matching despite the limited available space, preserving bandwidth efficiency.
Solution Approach 2:
The antenna elements are arranged in a three-dimensional configuration utilizing the available space efficiently. The coupling element enables vertical and lateral arrangement of multiple elements without requiring additional horizontal space, allowing wireless functionality to be integrated without compromising bandwidth due to spatial constraints.
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 approach allows for an increase in the number of electrically conducting elements without increasing the device's size or reducing bandwidth, enhancing communication efficiency and comfort by distributing features across the device without bulkiness or interference.
Implementation Method 1
the coupling element comprises an electrically conducting element coupled to the wireless interface, and wherein the electrically conducting element is at least a part of the external antenna part
Implementation Method 2
an internal antenna part, where the internal antenna part includes a first antenna element, a second antenna element, where a first end of the second antenna element is arranged at one end of the first antenna element and is connected thereto, and where a second end of the second antenna element is connected to a ground plane
Implementation Method 3
utilizing decoupling elements like capacitors to minimize coupling losses
Data Source
Figure 1a~1c
Figure 2~3
Figure 4a~4b
AI summary
The disclosure presents a method and a hearing device comprising a first portion adapted for being arranged behind an ear of a user for providing a signal, an output transducer for converting the signal to an acoustic output, a coupling element coupled to the first portion, and wherein the coupling element is adapted for transmitting at least the signal or the acoustic output. Furthermore, the hearing device comprises an antenna which includes an external antenna part and an internal antenna part, where the internal antenna part includes a first antenna element, a second antenna element where a first end of the second antenna element is arranged at one end of the first antenna element and is connected thereto, and where a second end of the second antenna element is connected to a ground plane, and a third antenna element which is spaced at a distance from the second antenna element and connected to the first antenna element, a feeding unit configured to supply a current to the antenna via the third antenna element, a wireless interface for receiving and/or sending data by means of the antenna, and wherein the coupling element comprises the external antenna part, and where the external antenna part is connected to the internal antenna part.