Behind-the-Ear RF Antenna Layout for Consistent Ear-Side Performance
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Solution Overview
Problem
Hearing devices worn behind the ear face challenges in achieving consistent wireless communication performance due to variations in radio-frequency antenna performance when placed on either the left or right ear, and the resonant frequency changes when near a head versus in free space.
Innovation Solution
A compact radio-frequency antenna design with an inverted F-antenna configuration, including non-resonant elements, is integrated into the hearing device housing to enhance wireless communication, featuring a plate-like surface with a feed and ground connection, and additional antenna elements extending orthogonally to improve radiation direction and bandwidth, minimizing performance differences between ear placements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional radio-frequency antenna is used in hearing devices, then wireless communication can be established, but the antenna performance varies significantly when placed on left or right ear
Solution Approach 1:
The patent applies asymmetry by designing the antenna system with different configurations for left and right hearing devices. The antenna elements are arranged asymmetrically relative to the housing geometry, with specific elements positioned to compensate for the different electromagnetic environments when worn on left versus right ears. This asymmetric design allows each ear-specific device to be optimized for its placement location.
Solution Approach 2:
The patent implements local quality by providing different antenna configurations tailored to specific ear placements. Rather than using a universal symmetric design, the antenna system is customized for left and right ears with locally optimized element positions, orientations, and ground plane arrangements to achieve consistent performance across different wear locations.
2Volume of moving object
If the radio-frequency antenna is placed near the head, then it can be integrated into the compact housing, but the resonant frequency changes compared to free space
Solution Approach 1:
The patent applies parameter changes by adjusting the antenna design parameters (element dimensions, spacing, ground plane size) to compensate for the frequency shift caused by proximity to the head. The antenna is designed with tuned parameters that account for the electromagnetic influence of the head and housing, shifting the resonant frequency to achieve the desired operating frequency in the actual wear condition rather than in free space.
Solution Approach 2:
The patent implements preliminary action by pre-compensating for the frequency shift during the antenna design phase. The antenna parameters are pre-adjusted to account for the known electromagnetic environment when worn near the head, so that the resonant frequency is correctly positioned before the device is actually used. This eliminates the need for post-manufacturing frequency adjustment.
3Reliability
If antenna elements are extended to improve radiation direction and bandwidth, then wireless communication performance improves, but the antenna size increases
Solution Approach 1:
The patent applies dimensionality change by utilizing three-dimensional space within the housing for antenna element arrangement. Instead of only extending elements in one dimension, the design uses vertical, horizontal, and depth dimensions to position multiple antenna elements and ground planes, achieving improved radiation characteristics and bandwidth through spatial configuration rather than simply increasing element length.
Solution Approach 2:
The patent implements segmentation by dividing the antenna system into multiple separate elements rather than using a single long element. The antenna is segmented into multiple shorter radiating elements with specific orientations and positions, along with segmented ground planes. This segmentation achieves the desired radiation pattern and bandwidth while keeping individual element lengths short and fitting within the compact housing.
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
The solution provides improved wireless communication performance and efficiency, ensuring consistent performance regardless of the ear placement and reducing power consumption, thus extending battery life in portable hearing devices.
Implementation Method 1
a radio-frequency antenna arranged at least partly inside the housing, the radio-frequency antenna configured to receive and/or transmit electromagnetic radio-frequency signals
Data Source
AI summary
A hearing device to be worn at least partly behind an ear of a user, comprising a housing; and a radio-frequency antenna arranged at least partly inside the housing is disclosed. The radio-frequency antenna is configured to receive and/or transmit electromagnetic radio-frequency signals, wherein the radio-frequency antenna comprises: at least one first antenna element with a plate like first surface, wherein the first antenna element has a feed for electrically connecting the radio-frequency antenna, and wherein the first antenna element has a ground.