Mobile Device Antenna Shielding Conductor Coupling
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Solution Overview
Problem
Mobile device antennas are affected by adjacent metal components, leading to undesirable interference and reduced communication quality due to unstable radio amplitude across wireless communication frequencies.
Innovation Solution
The antenna design includes a ground element, substrate, first and second radiating elements, a connection metal element, and a coaxial cable with a bare region of the shielding conductor exposed, allowing the shielding conductor to be coupled to the second radiating element, which reduces interference and stabilizes radiation gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional antenna structure is used in a mobile device, then the device can provide wireless communication functions, but the antenna is affected by adjacent metal components resulting in undesirable interference and reduced communication quality
Solution Approach 1:
The patent introduces a connection metal element as an intermediary component between the coaxial cable and the radiating elements. This connection metal element acts as a mediator that properly interfaces the shielding conductor with the antenna structure, preventing direct harmful interactions between metal components while maintaining electrical connectivity and signal integrity.
Solution Approach 2:
The patent extracts the shielding conductor from the coaxial cable by creating a bare region where the insulating outer layer is removed. This allows the shielding conductor to be separately connected to the second radiating element through the connection metal element, separating the shielding function from the signal transmission function and enabling independent optimization of each.
2Reliability
If the antenna structure includes proper shielding and connection elements, then interference from metal components is reduced, but the device complexity increases due to additional components
Solution Approach 1:
The patent merges multiple functions into the connection metal element: it serves as both a mechanical connector and an electrical conductor, connecting the shielding conductor to the second radiating element while providing structural support. This consolidation reduces the number of separate components needed and simplifies the overall assembly process.
Solution Approach 2:
The connection metal element performs multiple functions simultaneously: it provides mechanical support, establishes electrical connections, and contributes to the overall antenna radiation pattern. This multi-functionality reduces the need for separate dedicated components, thereby reducing overall device complexity while maintaining improved communication quality.
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 design enhances radiation stability and gain across various frequency bands, particularly in mobile devices with long coaxial cables, ensuring consistent communication performance in different operational modes.
Implementation Method 1
a coaxial cable, having central conductor coupled to the feedpoint, a shielding conductor, and an insulating outer layer, wherein the shielding conductor has a bare region, spaced from the feedpoint, that exposes a portion of the shielding conductor
Data Source
AI summary
An antenna for a mobile device includes a ground element, a substrate disposed over the ground element, a first radiating element having a feedpoint, a second radiating element coupled to the ground element and adjacent the first radiating element, and a connection metal element disposed on the substrate, and a coaxial cable, having central conductor coupled to the feedpoint, a shielding conductor, and an insulating outer layer, wherein the shielding conductor has a bare region, spaced from the feedpoint, that exposes a portion of the shielding conductor, and the portion of the shielding conductor is coupled through the connection metal element to the second radiating element.