Antenna Resonance Tuning Circuit for Hand Grip Interference
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Solution Overview
Problem
Electronic devices with built-in antennas experience performance degradation in radio wave transmission and reception due to external objects like human hands, with varying performance depending on whether the device is held in the right or left hand, affecting communication quality and speed.
Innovation Solution
A circuit that adjusts the resonance frequency of the antenna based on capacitance changes detected by touch keys, allowing the device to switch between different communication modes to optimize performance regardless of hand position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a built-in antenna is used for miniaturization and design improvement, then the device size is reduced and design is improved, but radio wave transmission and reception performance deteriorates due to external objects like hands
Solution Approach 1:
The patent implements a dynamic resonance frequency adjustment mechanism that automatically adapts the antenna's resonance frequency based on detected hand presence and grip state. The frequency adjustment circuit receives control signals from the processor based on sensing circuit detections, enabling the antenna to dynamically optimize its performance under varying external conditions while maintaining compact dimensions
Solution Approach 2:
The patent changes the resonance frequency parameter of the antenna based on detected external conditions. The frequency adjustment circuit modifies the antenna's operating frequency in response to hand detection and grip state identification, allowing the system to maintain reliable radio wave transmission and reception performance across different usage scenarios without increasing device size
2Device complexity
If the antenna position is fixed, then the device structure is simple, but radio wave transmission and reception performance varies significantly depending on hand position (left or right hand)
Solution Approach 1:
The patent implements a feedback control system where the sensing circuit continuously monitors hand presence and grip state, the processor analyzes this information to determine the optimal configuration, and the frequency adjustment circuit applies相应的 frequency adjustments. This closed-loop feedback mechanism enables the antenna system to automatically compensate for performance variations caused by different hand positions while maintaining a simple fixed physical structure
Solution Approach 2:
The patent makes the antenna system universal by enabling it to function effectively with both left and right hand gripping through automatic frequency adjustment. The sensing circuit detects various grip states, and the frequency adjustment circuit adapts the antenna's resonance frequency accordingly, allowing a single fixed antenna structure to maintain consistent performance across multiple usage scenarios and user preferences
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 reduces performance degradation and maintains consistent communication quality and speed when the device is held in either hand, improving overall communication performance.
Implementation Method 1
a sensing circuit for sensing an external object corresponding to the electronic device... detects an amount of change of capacitance corresponding to the external object
Implementation Method 2
a frequency adjustment circuit, electrically connected to the antenna, for adjusting a resonance frequency of the antenna
Data Source
AI summary
An electronic device according to an embodiment includes a first touch key disposed in a first area of the electronic device, a second touch key disposed in a second area of the electronic device, an antenna, a communication circuit, electrically connected to the antenna, for transmitting or receiving a signal using the antenna, a sensing circuit for sensing an external object corresponding to the electronic device, a frequency adjustment circuit, electrically connected to the antenna, adjusting a resonance frequency of the antenna, and a processor wherein the processor detects the external object using the sensing circuit while communicating with an external device using the communication circuit, in response to detecting the external object, detects an amount of change of capacitance corresponding to the external object using the first touch key or the second touch key. If a first amount of change of capacitance detected through the first touch key is greater than a second amount of change of capacitance detected through the second touch key, the electronic device communicates using the communication circuit wherein the frequency adjustment circuit is designated in a first mode. If the second amount of change of capacitance detected through the second touch key is greater than the second amount of change of capacitance detected through the first touch key, the electronic device communicates using the communication circuit wherein the frequency adjustment circuit is designated in a second mode. In addition, various other embodiments are possible.