Hearing Aid Antenna Design for Wireless Connectivity
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Solution Overview
Problem
Hearing aids face design constraints due to their small size and electronic components, which hinder the effectiveness of radio frequency antennas for wireless communication, particularly in achieving robust ear-to-ear performance.
Innovation Solution
A hearing aid antenna design with a total length between three quarters and five quarters of a wavelength, featuring a midpoint that extends from one side to the other, optimizing current amplitude and configuration to enhance wireless communication around the head, including a balanced antenna structure with sections positioned to minimize attenuation and maximize current amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna length is increased to improve wireless communication performance, then the ear-to-ear connectivity is improved, but the antenna cannot be accommodated within the small hearing aid housing
Solution Approach 1:
The patent transforms the antenna from a traditional linear structure into a three-dimensional configuration that extends across the hearing aid housing. The antenna is arranged to extend from a first side of the housing to a second side of the housing, utilizing the spatial dimensions of the device to achieve an effective radiating length of between 3/4 and 5/4 wavelengths without requiring a proportionally large housing volume.
Solution Approach 2:
The antenna is divided into multiple sections or elements that are interconnected to achieve the desired total length. This segmentation allows the antenna to be distributed across different parts of the hearing aid housing, with at least one section extending from one side to the other side of the device, thereby achieving the required electrical length while fitting within the compact physical constraints.
2Volume of moving object
If the antenna is made compact to fit in the hearing aid housing, then the device size constraint is satisfied, but the wireless communication around the head becomes weaker and more susceptible to impairments
Solution Approach 1:
The patent optimizes specific regions of the antenna structure to enhance local current amplitude. By positioning the antenna to extend across the housing and configuring its sections appropriately, the design creates regions of high current amplitude that improve radiation efficiency and communication robustness despite the overall compact size of the hearing aid device.
Solution Approach 2:
The patent specifies that the antenna should have a total length between 3/4 and 5/4 wavelengths, which is an optimized parameter range for achieving effective wireless communication around the head. This parameter optimization, combined with the specific geometric configuration extending across the housing, enables compact hearing aids to achieve reliable ear-to-ear connectivity.
3Device complexity
If traditional small antennas are used in hearing aids, then the device can be made compact, but the path loss in wireless communication increases significantly
Solution Approach 1:
The patent utilizes the three-dimensional space of the hearing aid housing to position the antenna in a configuration that extends from one side to the other side. This spatial arrangement increases the effective radiating length and improves radiation efficiency, thereby reducing path loss in wireless communication without significantly increasing device complexity.
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 design provides robust wireless communication with improved ear-to-ear connectivity, reducing path loss by up to 15 dB and making the system more resistant to noise, while maintaining the antenna within the hearing aid housing without protrusion.
Implementation Method 1
an antenna for emission or reception of an electromagnetic field
Data Source
AI summary
A hearing aid with an assembly, the assembly includes: a microphone; a signal processor for processing a first audio signal into a second audio signal compensating a hearing loss of a user; a wireless communication unit configured for wireless data communication; and an antenna for emission of an electromagnetic field, the antenna being coupled with the wireless communication unit, the antenna having a total length between three quarters of a wavelength of the emitted electromagnetic field and five quarters of the wavelength; wherein a part of the antenna extends from a first side of the assembly to a second side of the assembly; and wherein the antenna has a midpoint located at the part of the antenna extending from the first side to the second side, or a distance between the midpoint of the antenna and the part of the antenna is less than a quarter of the wavelength.