Charging Case Parasitic Element for Earbud Antenna Efficiency
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Solution Overview
Problem
The efficiency of wireless apparatus antennas, such as Bluetooth earbuds, significantly drops when placed back in their charging cases due to changes in electromagnetic environment, affecting subsequent usage.
Innovation Solution
Incorporating a parasitic element into the charging case that couples with the antenna of the wireless apparatus to simulate the external electromagnetic environment, maintaining or enhancing antenna efficiency within the charging case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless apparatus is placed in the charging case, then the wireless apparatus is charged and stored, but the antenna efficiency in the used bandwidth significantly drops due to changes in electromagnetic environment
Solution Approach 1:
A parasitic element is introduced as an intermediary component between the antenna and the charging case environment. This parasitic element couples with the antenna when the wireless apparatus is placed in the charging case, acting as a mediator to maintain the electromagnetic characteristics needed for high antenna efficiency while the apparatus is being charged and stored.
2Reliability
If the antenna is tuned for high efficiency in the usage bandwidth (e.g., Bluetooth bandwidth when worn), then the antenna efficiency is high during use, but the frequency characteristic shifts when placed in the charging case
Solution Approach 1:
The parasitic element is pre-configured in the charging case to counteract the electromagnetic environment changes that would otherwise cause frequency characteristic shifts. By having this element in place before the wireless apparatus is inserted, the system preemptively compensates for the environmental change, maintaining stable frequency characteristics and high antenna efficiency throughout the charging process.
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 parasitic element maintains or improves antenna efficiency by mimicking the external electromagnetic environment, ensuring consistent performance when the wireless apparatus is in the charging case.
Implementation Method 1
a parasitic element configured to be coupled to an antenna of the wireless apparatus when the wireless apparatus is put inside the charging case
Data Source
AI summary
A charging case for a wireless apparatus and an electronic device are provided. The charging case includes a parasitic element. When the wireless apparatus is put into the charging case, the parasitic element is coupled to an antenna of the wireless apparatus. The type, shape, dimension, production, position and number of the parasitic element are not limited, which may be determined based on practical requirements.