Capacitive Antenna Feeding Structure for Misalignment Tolerance
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Solution Overview
Problem
Conventional elastic antenna feeding structures apply compressive stress to electronic devices, reducing their reliability and making them vulnerable to external impacts and misalignment issues, especially in compact wireless devices.
Innovation Solution
An antenna feeding structure comprising a first conductor electrically coupled to the antenna, a second conductor coupled to RF circuitry, and an isolating layer between them, which acts as a capacitor to provide a robust and stress-free connection, eliminating the need for compressive forces and enhancing tolerance to misalignment and external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional elastic antenna feeding structures are used, then electrical connection between antenna and RF circuitry is achieved, but compressive stress is applied to the housing and internal components, reducing device reliability
Solution Approach 1:
The patent replaces the mechanical elastic contact system with an electromagnetic field-based capacitive coupling system. The feeding structure uses two conductors separated by an isolating layer to form a capacitor, where RF signals are transmitted through electromagnetic fields rather than direct mechanical contact. This eliminates the need for compressive stress while maintaining electrical connection functionality.
Solution Approach 2:
The isolating layer acts as an intermediary between the first and second conductors, enabling electromagnetic field transmission while preventing direct electrical contact. This mediator allows the capacitive coupling to function without requiring mechanical pressure, thus eliminating compressive stress on the housing and internal components.
2Reliability
If elastic feeding structures are used, then electrical connection is maintained, but the device becomes vulnerable to external impacts and misalignment issues
Solution Approach 1:
By replacing the mechanical elastic contact system with a capacitive coupling system, the patent eliminates the vulnerability to external impacts and misalignment. The electromagnetic field-based transmission through the isolating layer is not affected by physical displacement or impact forces that would compromise mechanical contact.
3Volume of moving object
If compact device design is pursued, then portability is improved, but component downscaling and reusage become more challenging
Solution Approach 1:
The isolating layer serves multiple functions simultaneously: it provides electrical insulation between conductors, acts as a dielectric for capacitive coupling, and can be integrated into existing housing structures. This multi-functionality reduces the need for additional components, simplifying integration in compact devices.
Solution Approach 2:
The patent merges the feeding structure with existing device components - the first conductor is integrated with the antenna, the second conductor with the RF circuitry, and the isolating layer can be formed as part of the housing or internal structure. This consolidation reduces component count and simplifies assembly in compact devices.
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 improves the reliability and robustness of wireless devices by reducing assembly costs and preventing malfunctions due to compressive stress release, while maintaining high-quality wireless communication performance.
Implementation Method 1
at least a part of the isolating layer is made of a dielectric material
Implementation Method 2
the antenna feeding structure serves as a capacitor in a matching circuit of the antenna
Data Source
AI summary
Disclosed are an antenna feeding structure and an electronic device. The antenna feeding structure includes: a first conductor, electrically coupled to a part of an antenna, where the part of the antenna is located at a housing of an electronic device; a second conductor, electrically coupled to radio-frequency circuitry on a circuit board, where the second conductor is located on a part of the circuit board, and the part of the circuit board is enclosed in the housing; and an isolating layer, located between the first conductor and the second conductor, where the first conductor is isolated from the second conductor via the isolating layer. The antenna feeding structure is more robust to external impact and more tolerant for misalignment between the antenna and the circuit board, and induces no compressive force against the antenna and the circuit board.