Wireless Device Ground Plane Boosters Multiband Operation
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Solution Overview
Problem
Current wireless handheld devices face challenges in miniaturization and cost due to the need for customized antenna designs for each model, which are complex and require significant space, limiting their ability to operate efficiently across multiple frequency bands without increasing size or complexity.
Innovation Solution
A radiating system comprising two or more radiation boosters and a radiofrequency system with matching networks that allow for impedance matching across multiple frequency regions, enabling operation in separate frequency regions through a single external port, with transmission lines configured to provide efficient filtering and reduce component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional antenna element is designed to operate in multiple frequency bands, then the antenna can cover wider frequency ranges, but the antenna size and structural complexity increase significantly
Solution Approach 1:
The antenna system is divided into separate radiation boosters, each optimized for specific frequency bands, rather than using a single complex multiband antenna element. This segmentation allows each booster to maintain simple geometry while collectively covering multiple frequency ranges.
Solution Approach 2:
The ground plane is designed to serve multiple functions: it acts as the radiating element for lower frequency bands and as a reflective surface for higher frequency bands. This multi-functionality eliminates the need for separate antenna structures for different frequency ranges.
2Adaptability or versatility
If a traditional antenna element is designed to operate in multiple frequency bands, then the antenna can cover wider frequency ranges, but the structural complexity and design customization increase
Solution Approach 1:
The antenna system is divided into separate radiation boosters, each optimized for specific frequency bands, rather than using a single complex multiband antenna element. This segmentation allows each booster to maintain simple geometry while collectively covering multiple frequency ranges.
Solution Approach 2:
The ground plane is designed to serve multiple functions: it acts as the radiating element for lower frequency bands and as a reflective surface for higher frequency bands. This multi-functionality eliminates the need for separate antenna structures for different frequency ranges.
3Reliability
If the antenna system is customized for each wireless device model, then the radiofrequency performance can be optimized, but the manufacturing cost and time to market increase
Solution Approach 1:
The radiation booster design is made universal and can be applied across multiple device models and form factors. The same basic booster structure can be adapted to different devices by adjusting parameters such as height, spacing, and ground plane configuration, eliminating the need for complete redesign for each model.
Solution Approach 2:
The antenna system achieves model-specific optimization through parameter adjustments rather than structural redesign. By changing dimensions such as booster height, spacing from ground plane, and ground plane size, the same basic structure can be tuned for different frequency requirements and device form factors.
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
This solution allows for smaller, more efficient wireless devices that can operate across a wide range of frequencies with reduced complexity and cost, enabling thinner form factors and simplified integration, while maintaining suitable radiofrequency performance.
Implementation Method 1
a ground plane layer 307 configured to reflect a portion of the electromagnetic waves radiated by the radiation boosters
Implementation Method 2
exciting a radiation mode in the ground plane layer
Implementation Method 3
two or more radiation boosters 303, 305 configured to couple electromagnetic energy to the ground plane layer 307
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~5
AI summary
The invention refers to a wireless device comprising a radiating system configured to operate electromagnetic wave signals from a first frequency region and a second frequency region, the radiating system comprising a radiating structure, a radiofrequency system, and an external port; the radiating structure comprises: a ground plane layer; and a first radiation booster connected to a first feeding line, a second radiation booster connected to a second feeding line, wherein each of the first and second radiation boosters fits in an imaginary sphere having a diameter smaller than 1/3 of a radiansphere having a radius equal to a free-space wavelength corresponding to a lowest frequency of the first frequency region, divided by two times π (pi); the radiofrequency system comprises: a combining structure; a first matching circuit including a first transmission line; a second matching circuit including a second transmission line; and a third matching circuit;wherein the first matching circuit is connected to the first feeding line and the combining structure, the second matching circuit is connected to the second feeding line and the combining structure, and the third matching circuit is connected to the combining structure and the external port; wherein the radiofrequency system modifies impedance of the radiating structure to provide impedance matching to the radiating system within the first and second frequency regions at the external port; wherein each of the first and second transmission lines is characterized by a width dimension equal or greater than lmm, and less than 3.5mm; and wherein a minimum distance of each of the first and second transmission lines to the ground plane layer is greater than 0.1 mm, and equal or less than 1.0mm.