Multi-Band Antenna Structure for Narrow-Bezel Notebook Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of designing an antenna structure that can transmit and receive multiple wireless frequency bands efficiently within the limited internal space of a miniaturized electronic device, such as a notebook computer, is exacerbated by the need for a narrow screen frame, leading to insufficient bandwidth.
Innovation Solution
The antenna structure incorporates a grounding element, shorting radiation element, feeding radiation element, parasitic radiation element, and a switching circuit with multiple paths and passive components to adjust impedance and frequency bands, allowing for efficient operation across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electronic device is miniaturized with a narrow screen frame, then the device size is reduced, but the antenna bandwidth becomes insufficient
Solution Approach 1:
The antenna structure is divided into multiple independent radiation elements (first radiation element, second radiation element, third radiation element, and fourth radiation element) with different geometric configurations. Each element contributes to different frequency bands, allowing the compact antenna to cover a wide bandwidth from 617 MHz to 5.925 MHz despite the limited device size.
Solution Approach 2:
The antenna structure utilizes three-dimensional spatial arrangement by extending radiation elements in multiple directions (first direction and second direction perpendicular to each other) and employing vertical stacking with grounding elements at different levels. This dimensional approach enables multiple frequency bands to be accommodated within the limited planar space of the miniaturized device.
2Adaptability or versatility
If multiple frequency bands are covered, then the antenna versatility is improved, but the antenna structure complexity increases
Solution Approach 1:
Multiple radiation elements with different geometric shapes (L-shaped, T-shaped, and straight configurations) are merged into a single integrated antenna structure that shares common grounding elements and feeding networks. This combination allows the antenna to cover multiple frequency bands (including LTE bands 5, 8, 28, 71 and 5G bands) while maintaining a unified structural design rather than using separate antennas for each band.
Solution Approach 2:
The antenna structure is designed as a multi-functional system where the same physical structure supports multiple operating frequencies and communication standards. The radiation elements can be selectively activated or deactivated based on the required frequency band, allowing a single antenna structure to perform the functions of multiple specialized antennas.
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 antenna structure achieves efficient coverage of frequency bands from 617 MHz to 5.925 MHz, optimizing antenna characteristics and ensuring compliance with stringent specifications, while also serving as a sensing electrode to manage electromagnetic wave absorption.
Implementation Method 1
The parasitic radiation element is connected to the radiating element. The parasitic radiation element is located between the third radiating portion and the grounding element
Data Source
AI summary
An electronic device includes a housing and an antenna structure disposed in the housing. The antenna structure includes a grounding element, a shorting radiation element, a feeding radiation element, a radiating element, a parasitic radiation element, and a feeding element. The shorting radiation element is connected to the grounding element. The feeding radiation element includes a feeding portion, a first radiating portion, a second radiating portion, and a third radiating portion. The feeding portion is connected to the shorting radiation element, the first radiating portion, the second radiating portion, and the third radiating portion. The radiating element is connected to the grounding element. The parasitic radiation element is connected to the radiating element. The parasitic radiation element is located between the third radiating portion and the grounding element.