3D Mobile Antenna Structure for Wideband Coverage
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Solution Overview
Problem
Current mobile devices face challenges in designing small-size, wideband antennas due to limited internal space, resulting in narrow antenna bandwidth and poor communication quality.
Innovation Solution
A mobile device antenna structure comprising a nonconductive mechanism element and a 3D antenna structure with specific radiation elements and connection elements, including a feeding connection element, first radiation element, grounding connection element, and third radiation element, which are strategically arranged to cover multiple frequency bands using a coupling mechanism, allowing for compact design and wideband operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to fit limited internal space, then the device size is reduced, but the antenna bandwidth becomes narrow and communication quality deteriorates
Solution Approach 1:
The patent transitions from traditional planar antenna designs to a three-dimensional antenna structure that extends vertically within the device housing. The antenna elements are arranged in multiple layers and dimensions, utilizing the Z-axis (height) to achieve wideband performance without increasing the device's footprint area. This dimensional transition allows the antenna to occupy more spatial volume while maintaining a compact form factor.
Solution Approach 2:
The patent implements a nested antenna configuration where multiple antenna elements are positioned within each other's electromagnetic fields. The first, second, and third antenna elements are arranged such that they share common grounding structures and feeding networks, with elements nested in different spatial layers. This nesting approach enables multiple frequency bands to be supported within a compact volume by utilizing the electromagnetic coupling between closely spaced elements.
2Adaptability or versatility
If multiple antennas are added to cover more frequency bands, then the communication coverage is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent designs a universal antenna system where a single integrated antenna structure supports multiple frequency bands (including LTE bands 3, 7, 20 and Wi-Fi 2.4GHz and 5GHz). The first, second, and third antenna elements can be selectively activated depending on the required frequency band, with shared feeding networks and grounding structures that serve multiple functions. This multi-functionality reduces the total number of separate antenna components needed while maintaining comprehensive frequency coverage.
Solution Approach 2:
The patent merges multiple antenna elements into a single integrated assembly that shares common structural support and grounding infrastructure. The antenna elements are combined within a unified housing structure, with shared feeding points and common ground planes that reduce overall structural complexity. This consolidation approach maintains the capability to support multiple frequency bands while reducing the number of separate components and simplifying the overall antenna system architecture.
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 covers frequency bands from 700 MHz to 5850 MHz, supporting LTE and Wi-Fi communications, while maintaining a compact size and low design complexity, suitable for small-size mobile communication devices.
Implementation Method 1
The antenna structure includes a feeding connection element, a first radiation element, a second radiation element, a grounding connection element, and a third radiation element... The antenna structure covers a first frequency band from 700 MHz to 960 MHz, a second frequency band from 1450 MHz to 2700 MHz, and a third frequency band from 5150 MHz to 5850 MHz
Data Source
AI summary
A mobile device includes a nonconductive mechanism element and an antenna structure. The antenna structure is formed over the nonconductive mechanism element. The antenna structure includes a feeding connection element, a first radiation element, a second radiation element, a grounding connection element, and a third radiation element. The feeding connection element is coupled to a feeding point. A first end of the first radiation element is coupled to the feeding connection element, and a second end of the first radiation element is open. A first end of the second radiation element is coupled to the feeding connection element, and a second end of the second radiation element is open. The grounding connection element is coupled to a grounding point. A first end of the third radiation element is coupled to the grounding connection element, and a second end of the third radiation element is open.