Floating Conduction Member for Compact Antenna Design
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Solution Overview
Problem
In MIMO communication systems, the proximity of radiating elements to the conducting board causes electromagnetic interaction, leading to shifts in resonance frequency, increased reflection coefficient, and reduced antenna gain, limiting the compact design of wireless devices.
Innovation Solution
A floating conduction member made of copper sheet, electrically isolated from the conduction board, is placed between the radiating elements and the conducting board, reducing electromagnetic coupling and maintaining resonance frequency stability while allowing closer proximity, thus enhancing antenna gain and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the radiating element is brought into proximity with the conducting board, then the antenna size is reduced and compactness is improved, but the resonance frequency shifts and antenna gain decreases
Solution Approach 1:
A floating conduction member is introduced as an intermediary between the radiating element and the conducting board. This intermediate conductive structure shields the radiating element from direct electromagnetic interaction with the board, preventing resonance frequency shifts while allowing the element to be positioned closer to the board for compact antenna design.
2Volume of moving object
If the radiating element is brought into proximity with the conducting board, then the antenna size is reduced, but the reflection coefficient increases
Solution Approach 1:
The floating conduction member serves as a mediator that reduces electromagnetic coupling between the radiating element and the conducting board. By positioning this intermediate conductive structure between them, the reflection coefficient is reduced while maintaining the compact antenna configuration with the element close to the board.
3Volume of moving object
If the radiating element is brought into proximity with the conducting board, then the antenna size is reduced, but the antenna gain falls
Solution Approach 1:
The floating conduction member acts as a shielding intermediary that prevents harmful electromagnetic interactions between the radiating element and the conducting board. This allows the element to be positioned close to the board for compactness while maintaining high antenna gain by reducing energy loss through electromagnetic coupling with the board.
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 solution prevents resonance frequency shifts and reduces the reflection coefficient, enabling higher antenna gain and a more compact design by effectively blocking electromagnetic fields between the radiating elements and the conducting board, even at distances less than λ/16, while maintaining performance across the desired frequency band.
Implementation Method 1
a floating conduction member, which is provided between the radiating element and a conduction board having a high-frequency signal source which generates high-frequency signals for supplying to the feed portion, and which is electrically floated
Data Source
AI summary
An antenna device, including a radiating element having a feed portion and a floating conduction member, which is provided between the radiating element and a conduction board having a high-frequency signal source which generates high-frequency signals for supplying to the feed portion, and which is electrically floated.