Multi-Band Antenna Structure for Narrow-Bezel LTE Coverage
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Solution Overview
Problem
The design of antenna structures in electronic devices, such as laptops and tablets, faces challenges in maintaining communication quality while adhering to the trend of thin and light aesthetics, particularly due to the narrow bezel which leads to a dramatic decrease in bandwidth.
Innovation Solution
A miniaturized antenna structure comprising a substrate with specific radiating, grounding, and shorting portions, along with capacitive and feeding elements, is designed to generate multiple operating frequency bands, including low and high frequency ranges, supporting a full LTE band by optimizing the placement and connectivity of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the antenna structure is miniaturized to fit narrow bezel designs, then the aesthetic design and thin profile are improved, but the bandwidth and communication quality deteriorate
Solution Approach 1:
The antenna structure is divided into multiple radiating portions (first, second, third radiating portions) with different orientations and functions. Each portion contributes to different frequency bands, allowing the compact antenna to achieve full LTE frequency band coverage despite the limited space in narrow bezel designs.
Solution Approach 2:
The patent utilizes three-dimensional space by extending radiating portions in different directions (first direction, second direction perpendicular to first) and employing multiple layers (substrate, grounding layer). This dimensional approach maximizes the effective radiating area within the constrained two-dimensional bezel space.
2Adaptability or versatility
If multiple frequency bands are integrated into a single antenna structure, then the device complexity is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The antenna structure is designed as a multi-functional system where a single integrated structure supports multiple frequency bands (LTE Band 71, Band 3, Band 7, etc.). The radiating portions are configured with specific dimensions and orientations to resonate at different frequencies, allowing one antenna to perform multiple communication functions simultaneously.
Solution Approach 2:
Different sections of the radiating portions have varying dimensions (length, width, orientation) to tune the resonant frequencies. By changing geometric parameters of different radiating sections, the antenna achieves impedance matching and resonance across multiple frequency bands, enabling broad coverage without requiring separate antennas for each band.
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 effectively supports a full frequency band of LTE (617 MHz-5925 MHz) while being compact enough to fit within narrow bezel designs, ensuring both thin and light aesthetics and maintained communication quality.
Implementation Method 1
a first capacitive element coupled between a first section and a second section of the shorting portion
Data Source
AI summary
An electronic device having an antenna structure is disclosed. The antenna structure includes a substrate, a first radiating portion, a second radiating portion connected to the first radiating portion, a grounding portion, a shorting portion connected between the second radiating portion and the grounding portion, a third radiating portion, a first grounding extension portion connected between the third radiating portion and the grounding portion, and a first capacitive element coupled between a first section and a second section of the shorting portion. The coupling of the shorting portion, the first grounding extension portion, and the third radiating portion generates a first operating frequency band, and the coupling of the first radiating portion, the shorting portion, the first grounding extension portion, and the third radiating portion generates a second operating frequency band, which is higher than the first operating frequency band, through the matching of the first capacitive element.