Compact Antenna Structure with Nested Float Element for Wearables
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Solution Overview
Problem
Wearable devices lack sufficient space to accommodate traditional antenna structures for wireless communication, posing a challenge for antenna designers to effectively cover mobile communication bands in compact designs.
Innovation Solution
An antenna structure comprising a ground element and a metal loop with a main radiation element, a float radiation element, and strategically positioned shorting points, which integrates loop and slot antenna configurations to provide omni-directional radiation patterns and support frequency bands like Wi-Fi and Bluetooth within a small form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional antenna structures are used to cover mobile communication bands, then wireless communication coverage is achieved, but the antenna size becomes too large for wearable devices
Solution Approach 1:
The patent implements nesting by placing the float radiation element inside the metal loop structure, and positioning the main radiation element such that it shares space with the ground element and metal loop. This nested arrangement allows multiple radiation elements to coexist in a compact volume, achieving full mobile communication band coverage without requiring a large antenna structure.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by positioning the float radiation element adjacent to and separated from both the ground element and main radiation element. The metal loop surrounds the ground element, creating a multi-layered vertical structure that efficiently packs the antenna components into a small footprint suitable for wearable devices.
2Volume of moving object
If antenna structure is reduced for compact wearable devices, then space is saved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the antenna into distinct functional segments: the ground element, the metal loop with main radiation element, and the separate float radiation element. Each segment can be manufactured independently using standard PCB fabrication techniques, then assembled together. This segmentation simplifies the manufacturing process while achieving the compact form factor needed for wearable devices.
3Volume of moving object
If compact antenna design is implemented, then space for wearable devices is optimized, but frequency band coverage may be compromised
Solution Approach 1:
The patent combines multiple antenna types into a single integrated structure: the metal loop provides loop antenna characteristics for certain frequency bands, while the main radiation element and float radiation element provide slot antenna characteristics for other bands. The ground element serves as both a reference plane and a radiating element. This merging of different antenna mechanisms within a compact footprint enables comprehensive mobile communication band coverage including 2G, 3G, LTE, Wi-Fi, and Bluetooth frequencies.
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 wireless communication across desired frequency bands, offering a compact, cost-effective, and aesthetically integrated solution suitable for wearable devices and other portable electronics with enhanced broadband characteristics and manufacturing simplicity.
Implementation Method 1
The metal loop includes a main radiation element comprising a feeding point, a first shorting point and a second shorting point... A float radiation element is adjacent to the main radiation element... The ground element is substantially surrounded by the metal loop
Data Source
AI summary
An antenna structure includes a ground element and a metal loop. The metal loop includes a main radiation element and a float radiation element. The main radiation element has a feeding point, a first shorting point, and a second shorting point. The first shorting point and the second shorting point are both coupled to the ground element. The feeding point is substantially positioned between the first shorting point and the second shorting point. The float radiation element is adjacent to the main radiation element, and is separated from the ground element and the main radiation element. The ground element is substantially surrounded by the metal loop.