Metal Frame Antenna with Resonating Structures for Low-Frequency Efficiency
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Solution Overview
Problem
Metal housing in terminal devices attenuates antenna performance when held in hand, leading to deteriorated communication due to shielding of electromagnetic waves, despite aesthetical and durability advantages.
Innovation Solution
An antenna design featuring a metal frame with slots forming radiating elements and resonating structures, including radiation arms and suspended arms connected to a ground point, which adjusts switch states to improve radiation efficiency across different frequency bands and reduce attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal housing is used for aesthetic and durability, then appearance quality and durability are improved, but antenna performance deteriorates due to electromagnetic wave shielding
Solution Approach 1:
The metal housing is segmented into multiple sections, with specific sections containing slot antennas. This segmentation allows the metal housing to maintain its overall aesthetic and structural integrity while creating localized antenna regions that enable wireless communication functionality.
Solution Approach 2:
Slot antennas are introduced as intermediary structures within the metal housing. These slots serve as mediators that allow electromagnetic waves to penetrate through the otherwise shielding metal housing, enabling antenna functionality without compromising the metal housing's aesthetic and protective properties.
2Ease of manufacture
If antenna ends are bent to longer side of metal housing, then antenna structure is formed, but antenna performance attenuates when held in hand
Solution Approach 1:
The antenna structure incorporates flexible or adjustable elements that can adapt to different device orientations and usage conditions. This dynamic capability allows the antenna to maintain optimal performance whether the device is held in hand or placed on a surface, overcoming the limitation of fixed bent-antenna designs.
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
Enhances antenna efficiency in low-frequency bands, maintaining communication performance even when the device is held, by forming additional low-frequency bandwidth radiators and filtering out spurious waves, thus improving overall communication quality.
Implementation Method 1
each resonating structure includes one suspended radiation arm and a resonating component, the suspended radiation arm is connected to the resonating component
Implementation Method 2
the metal frame is provided with a slot to form a first radiating element and a second radiating element on the metal frame
Implementation Method 3
another metal segment on the metal bezel is configured to be a capacitance proximity sensor. The capacitance proximity sensor, in conjunction with a capacitance sensing circuit provides information
Data Source
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AI summary
Embodiments of this application provide an antenna and a terminal device. The antenna in this application includes a metal frame and at least one resonating structure. The metal frame includes a first radiating element and a second radiating element. The first radiating element includes a radiation arm connected to a feedpoint. The second radiating element includes a suspended radiation arm. Each resonating structure includes a suspended radiation arm and a resonating component, and the suspended radiation arm is connected to a ground point by using the resonating component. In this application, low-frequency bandwidth antenna efficiency can be improved.