Beam-Steerable Hearing Antenna Layout for Stable On-Body Links
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Solution Overview
Problem
Hearing devices face challenges in providing optimal wireless performance due to unpredictable wireless signal paths caused by varying user body shapes and habits, making it difficult to achieve consistent wireless link quality for on-body communication.
Innovation Solution
A hearing device with a beam-steerable antenna arrangement comprising two antennas oriented in different directions, allowing for switching or combining modes to optimize wireless communication based on user-specific body positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single antenna is used in the hearing device, then the device complexity is reduced, but the wireless link quality becomes unpredictable due to varying user body shapes and device positions
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements (first antenna with first electrically conducting segment, second antenna with second electrically conducting segment) that can be independently controlled. Each antenna element has a different orientation and radiation pattern, allowing the system to segment the wireless coverage space and select the most appropriate antenna based on the signal path conditions.
Solution Approach 2:
The antenna arrangement implements dynamic beam steering capability where the effective radiation pattern can be electronically adjusted by controlling the phase and amplitude of signals fed to each antenna element. This allows the system to adaptively steer the wireless signal path dynamically in response to changing user body positions and device orientations, transforming a static antenna system into a dynamic one that maintains optimal performance.
2Adaptability or versatility
If multiple antennas with different orientations are used, then the adaptability to different signal paths is improved, but the device complexity increases
Solution Approach 1:
Each antenna element is designed with specific local characteristics - the first antenna has a first electrically conducting segment oriented in a first direction, while the second antenna has a second electrically conducting segment oriented in a second direction. This creates local quality differences in the radiation patterns of each antenna element, allowing the system to provide directionally-specific wireless coverage that adapts to different signal path requirements.
Solution Approach 2:
The antenna arrangement provides multi-functionality by enabling the hearing device to operate effectively in multiple different wireless communication scenarios. The same antenna arrangement can serve different purposes - providing omnidirectional coverage when both antennas are activated, or directional beam steering when specific antennas are selected based on the required signal path, thus achieving universal adaptability across various usage conditions.
3Reliability
If the antenna arrangement is optimized for specific directions, then the wireless communication performance in those directions is improved, but the coverage area is reduced
Solution Approach 1:
The system merges the radiation patterns of multiple antenna elements to achieve comprehensive coverage. By combining the outputs of the first antenna (oriented in first direction) and second antenna (oriented in second direction), the system creates a composite radiation pattern that provides both directional focus for high-performance communication and broader area coverage, effectively merging the strengths of individual antenna patterns.
Solution Approach 2:
The antenna system employs periodic switching or beam steering between different directional patterns. The wireless communication unit can periodically adjust the phase and amplitude distribution across antenna elements to steer the main lobe of the radiation pattern in different directions over time, providing periodic coverage of different spatial zones while maintaining high performance in each direction during its active period.
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 antenna arrangement enhances wireless link quality by adaptively steering the signal path to maximize performance regardless of user body shape and device position, providing stable and efficient communication.
Implementation Method 1
a first antenna (6a) configured for transmitting/receiving EM-radiation at a first frequency
Implementation Method 2
a second antenna (6b) configured for transmitting/receiving EM-radiation at the first frequency
Data Source
AI summary
A hearing device for placement in a user's ear includes: at least one input transducer, an output transducer, a wireless communication unit and an antenna arrangement adapted for providing a wireless link, and a reference axis, the reference axis being parallel to the user's ear-to-ear axis, when the hearing device is placed in an operable position, wherein in that the antenna arrangement comprises a first antenna configured for transmitting/receiving EM-radiation at a first frequency, the first antenna comprising a first electrically conducting segment extending in a first direction, a second antenna configured for transmitting/receiving EM-radiation at the first frequency, the second antenna comprising a second electrically conducting segment extending in a second direction, the second direction being different from the first direction, a first feed coupling the first antenna to the wireless communication unit, and a second feed coupling the second antenna to the wireless communication unit.