Hearing Device Antenna Shielding for Radiation Efficiency
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Solution Overview
Problem
Hearing devices with wireless communication capabilities face radiation efficiency loss due to absorption by the user's head, leading to reduced communication range and increased power consumption.
Innovation Solution
An antenna unit with capacitive coupling to a shield unit, where the active unit transmits an electric field along or perpendicular to the ear-to-ear axis, generating an electromagnetic near field that is focused inside the device, improving radiation efficiency and stability across both ears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional antenna is used in a hearing device, then the device can achieve wireless communication, but radiation efficiency is lost due to absorption by the user's head
Solution Approach 1:
A shield unit is introduced as an intermediary component between the antenna and the user's head. This shield unit, positioned adjacent to the antenna, reflects and redirects electromagnetic energy away from the head, preventing absorption losses while maintaining wireless communication functionality
Solution Approach 2:
The antenna design transitions from conventional omnidirectional radiation to a directional radiation pattern by utilizing the shield unit to confine and direct electromagnetic energy in specific spatial dimensions, thereby avoiding the head absorption problem
2Loss of energy
If radiation efficiency is improved to maintain communication bandwidth, then communication range can be extended, but power consumption increases
Solution Approach 1:
The shield unit converts what would be harmful absorbed energy into beneficial reflected energy that is redirected toward useful communication directions, thereby improving radiation efficiency without requiring additional power input
3Loss of energy
If the antenna is designed for optimal performance on one ear, then communication efficiency is improved, but the device cannot be universally used on either ear
Solution Approach 1:
The shield unit creates an asymmetric radiation pattern that is directed away from the head, and this asymmetric configuration works effectively regardless of whether the device is worn on the left or right ear, achieving universal compatibility while maintaining high efficiency
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 data rates, extends communication range, and reduces power consumption while maintaining performance stability regardless of the device's placement on either ear.
Implementation Method 1
The active surface may be configured to transmit an electric field in a direction along or perpendicular to an ear-to-ear axis of the user when the hearing device may be worn in its operational position by the user, whereby the electric field may be coupled by a capacitive coupling towards the first section generating an electromagnetic near field.
Implementation Method 2
The electric field may be coupled by a capacitive coupling towards the first section generating an electromagnetic near field.
Implementation Method 3
The shield unit may be configured to focus the electromagnetic near field inside the hearing device.
Data Source
Figure 1A~1B
Figure 2A~3B
Figure 4A~4D
AI summary
A hearing device configured to be worn at an ear of a user, where the hearing device comprising an antenna unit. The antenna unit comprises an active unit being connected to a ground unit by a feeder unit, the active unit includes an active surface, and a shield unit having a continuous surface, where a first section of the continuous surface may be arranged adjacent to the active surface. Furthermore, the active surface may be configured to transmit an electric field in a direction along or perpendicular to an ear-to-ear axis of the user when the hearing device may be worn in its operational position by the user, whereby the electric field may be coupled by a capacitive coupling towards the first section generating an electromagnetic near field, and where the shield unit may be configured to focus the electromagnetic near field inside the hearing device.