Dual-Coupled-Fed Antenna System for Compact Mobile Devices
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Solution Overview
Problem
The limited interior space of mobile devices leads to antenna interference due to closely packed antennas, and traditional solutions that increase distance result in a large antenna system, necessitating a new design for efficient wireless communication.
Innovation Solution
A dual-coupled-feed antenna system with a dielectric substrate, an antenna ground plane, and separate feeding elements positioned between the radiation element and the antenna ground plane, generating both low-frequency and high-frequency bands without the need for coupling grounding mechanisms, allowing for compact size and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are disposed close to each other to reduce size, then the device size is reduced, but antenna interference increases
Solution Approach 1:
The patent divides the antenna system into separate feeding elements and radiation elements with distinct functional zones. The feeding elements are completely separate from the radiation elements, creating isolated electromagnetic fields that reduce mutual interference while maintaining compact overall dimensions.
Solution Approach 2:
The patent applies different structural characteristics to different parts of the antenna system. The feeding elements have specific geometric configurations optimized for signal injection, while the radiation elements are designed for efficient electromagnetic radiation. This localized optimization allows close spacing without compromising performance or increasing interference.
2Object-generated harmful factors
If the distance between antennas is increased to reduce interference, then antenna isolation is improved, but the antenna system size becomes too large
Solution Approach 1:
The patent transitions from traditional planar antenna layouts to a three-dimensional configuration where feeding elements are positioned in spatial relationships that are not simply scaled versions of conventional designs. The completely separate feeding and radiation elements create electromagnetic isolation through spatial arrangement rather than relying solely on increased distance.
3Adaptability or versatility
If traditional antenna designs are used to achieve dual-band operation, then coupling grounding mechanisms are required, but device complexity and size increase
Solution Approach 1:
The patent extracts and removes the coupling grounding mechanisms from the antenna design entirely. The feeding elements are completely separate from the radiation elements and from each other, eliminating the need for complex grounding structures while maintaining dual-band operation through the inherent resonant properties of the simplified element configurations.
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 design achieves efficient dual-band operation with improved isolation and reduced size, maintaining high throughput and radiation gain while minimizing the overall antenna system size, suitable for small mobile communication devices.
Implementation Method 1
The radiation element is excited by the first feeding element by coupling, so as to generate a low-frequency band and a high-frequency band
Data Source
AI summary
A mobile device includes a system ground plane and an antenna system. The antenna system includes a dielectric substrate, an antenna ground plane, a radiation element, and at least one feeding element. The antenna ground plane is coupled to the system ground plane. The feeding element is coupled to a signal source. The feeding element is positioned between the radiation element and the antenna ground plane. The feeding element and the radiation element are completely separate from each other. The radiation element is excited by the feeding element by coupling.