Inverted F Antenna Module for High Screen Ratio Laptops
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Solution Overview
Problem
Conventional closed-slot antennas in laptops occupy excessive space, failing to meet demands for higher screen ratios while maintaining effective wireless signal transmission and reception.
Innovation Solution
A dual-frequency antenna module with a dual open-loop design, featuring an inverted F metal plate and slots on a metal board, which operates cooperatively with radiation bodies to generate wireless signals at different frequencies, and an inverted U grounding configuration for impedance matching, allowing for a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional closed-slot antenna is used, then wireless signal transmission and reception can be achieved, but the area occupied is excessive, reducing the screen ratio
Solution Approach 1:
The patent transitions from a planar closed-slot antenna design to a three-dimensional inverted F-shaped antenna structure. By utilizing vertical dimension (height) in addition to horizontal plane, the antenna achieves equivalent radiation performance with reduced footprint area, thereby increasing screen ratio while maintaining wireless communication functionality
Solution Approach 2:
The antenna is divided into multiple functional segments: the inverted F-shaped conductive structure for radiation, the ground plane for reference potential, and the feeding network for signal input. This segmentation allows each component to be optimized independently, achieving compact overall size while maintaining effective wireless signal transmission and reception
2Area of stationary object
If the antenna size is reduced to increase screen ratio, then aesthetic and structural requirements are met, but wireless signal transmission and reception effectiveness deteriorates
Solution Approach 1:
The patent optimizes key geometric parameters of the inverted F-shaped antenna including arm lengths, widths, and spacing dimensions to achieve resonant frequencies matching standard wireless communication bands. By carefully adjusting these parameters, the antenna maintains effective radiation performance despite reduced overall size, ensuring reliable wireless signal transmission and reception
Solution Approach 2:
The ground plane serves as an intermediary element between the inverted F-shaped radiating structure and the substrate. It provides a reference potential plane that enhances the radiation efficiency of the compact antenna structure, enabling effective wireless communication despite the reduced antenna footprint
3Area of stationary object
If a compact antenna design is used, then screen ratio is improved, but impedance matching becomes more difficult to achieve
Solution Approach 1:
The inverted F-shaped antenna structure serves multiple functions simultaneously: it acts as the radiating element, provides impedance transformation through its geometric configuration, and integrates with the ground plane for both radiation and reference potential. This multi-functionality simplifies the overall design by eliminating the need for separate impedance matching components, reducing design complexity despite compact dimensions
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 enables efficient wireless signal transmission and reception across multiple frequencies while maintaining a high screen ratio, achieving isolation below -20 dB and maintaining antenna efficiency even in a narrow metal frame.
Implementation Method 1
The first radiation body, the slot and the inverted F metal plate operate cooperatively to generate a wireless signal at a first operating frequency. The second radiation body, the slot and the inverted F metal plate operate cooperatively to generate a wireless signal at a second operating frequency.
Data Source
AI summary
An antenna module includes a metal board, an inverted F metal plate and an antenna unit. A slot is provided between the inverted F metal plate and the metal board, the inverted F metal plate and the metal board are integrally formed, and the inverted F metal plate is disposed perpendicular to the metal board. The antenna unit is disposed corresponding to the slot and the inverted F metal plate, and includes a radiation part and a ground part. The radiation part is coupled to a signal feeding point and includes a first radiation body and a second radiation body. The first radiation body, the slot and the inverted F metal plate operate cooperatively to generate a wireless signal at a first operating frequency. The second radiation body, the slot and the inverted F metal plate operate cooperatively to generate a wireless signal at a second operating frequency.