Metal Frame Antenna Resonance Arm Segmentation
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Solution Overview
Problem
In electronic devices, the integration of metal elements for design thinness affects antenna bandwidth and radiation efficiency, making it challenging to maintain both performance and appearance uniformity, as conventional antennas are compromised by metal shielding.
Innovation Solution
Utilizing a metal frame as the antenna resonance arm and adjusting the capacitance of a variable capacitor to manage impedance matching for both high-frequency and low-frequency signals, eliminating the need for additional metal frames and simplifying debugging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If metal elements are integrated into the device for thinness and appearance design, then appearance uniformity and device thinness are improved, but antenna bandwidth and radiation efficiency deteriorate due to metal shielding effects
Solution Approach 1:
The patent segments the antenna system into multiple resonance arms with different metal frame structures. Each resonance arm is designed with specific geometric characteristics to support different resonance frequencies, allowing the antenna to achieve broad bandwidth coverage while maintaining the metal frame appearance. The segmentation enables independent optimization of each arm for different frequency bands without compromising overall appearance uniformity.
Solution Approach 2:
The metal frame structure serves dual functions: it maintains the device's appearance uniformity and simultaneously acts as the antenna resonance arm for radiation. By designing the metal frame with specific geometric features (different lengths, orientations, and configurations of multiple resonance arms), it becomes a multi-functional component that both aesthetic and electromagnetic radiation requirements.
2Shape
If conventional antenna designs are used with metal shielding, then appearance design is compromised by requiring non-metal materials, but using non-metal materials preserves appearance uniformity while reducing antenna performance
Solution Approach 1:
The metal frame is designed to simultaneously serve as both the structural appearance element and the antenna radiation element. By incorporating multiple resonance arms with specific geometric characteristics into the metal frame, it becomes a multi-functional component that maintains appearance uniformity while providing efficient electromagnetic radiation without requiring separate non-metal antenna components.
Solution Approach 2:
The patent optimizes the geometric parameters of the metal frame resonance arms (lengths, orientations, spacing) to achieve resonance at desired frequencies while maintaining appearance uniformity. By carefully adjusting these parameters, the metal frame can be tuned to resonate effectively at multiple frequencies, ensuring both aesthetic and performance requirements are met.
3Reliability
If additional metal frames are used to generate different frequency resonances, then bandwidth coverage is improved, but device space requirements and complexity increase
Solution Approach 1:
The antenna system is segmented into multiple resonance arms within a single metal frame structure. Each resonance arm is designed with specific geometric characteristics to support different resonance frequencies. This segmentation allows broad bandwidth coverage to be achieved through a unified metal frame design rather than requiring multiple separate metal frames, thereby reducing space requirements and structural 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
This approach preserves the appearance design of electronic devices while enhancing antenna bandwidth and efficiency, reducing space requirements and simplifying debugging by adjusting capacitance, thus overcoming the challenges of metal shielding effects.
Implementation Method 1
a metal frame is used as an antenna resonance arm
Implementation Method 2
adjusting the capacitance of a variable capacitor to manage impedance matching
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
An electronic device is disclosed in implementation manners of the present invention, where the electronic device is provided with a metal frame, the electronic device further includes an antenna feeding point, an antenna ground, a feeding branch, a grounding branch, an antenna resonance arm, a variable capacitor, and a control circuit. The antenna resonance arm is a part of the metal frame after segmentation, the antenna feeding point is disposed on the feeding branch, a first connection portion and a second connection portion are disposed on the antenna resonance arm, the first connection portion is disposed on a first end portion of the antenna resonance arm, the second connection portion is disposed between the first end portion and a second end portion of the antenna resonance arm, the feeding branch is disposed between the second connection portion and the antenna ground, the grounding branch is disposed between the first connection portion and the antenna ground, the variable capacitor is disposed on the feeding branch, the variable capacitor is disposed between the antenna feeding point and the second connection portion, and the control circuit is configured to adjust a capacitance of the variable capacitor. According to the foregoing disclosed content, technical solutions provided in the present invention can give attention to both a bandwidth and efficiency of an antenna, and keep an appearance uniformity of the metal frame of the whole device.