Interleaved Multi-Feed Antenna for Isolation and Band Matching
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Solution Overview
Problem
Existing multi-antenna designs face challenges in achieving good isolation and matching while integrating multiple antennas, leading to decreased data transmission speed and increased complexity, particularly due to mutual coupling interference and size constraints.
Innovation Solution
A multi-feed antenna design featuring a first conductor layer, a second conductor layer, and supporting conductor structures with feeding conductor lines arranged in an interleaved annular configuration, generating multiple resonant modes that cover a communication band and providing effective energy isolation and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are integrated in the same frequency band, then multi-antenna integration capability is improved, but mutual coupling interference increases and isolation deteriorates
Solution Approach 1:
The patent segments the ground plane into multiple independent ground units (first ground unit, second ground unit, third ground unit, fourth ground unit) that are electrically isolated from each other. Each antenna element is associated with its own dedicated ground unit, which prevents coupling currents from spreading between adjacent antennas. This segmentation effectively reduces mutual coupling interference while maintaining multi-antenna integration capability.
Solution Approach 2:
The patent introduces periodic structures (such as electromagnetic bandgap structures or defected ground structures) as intermediary elements between adjacent antenna elements and ground units. These periodic structures act as electromagnetic barriers that block coupling currents and reduce interference between adjacent antennas operating in the same frequency band, thereby improving isolation without compromising integration.
2Object-affected harmful factors
If periodic structures are added as energy isolators between multiple antennas, then energy isolation is improved, but manufacturing stability deteriorates and production cost increases
Solution Approach 1:
The patent merges the ground plane structure with the antenna elements by directly connecting each antenna to its dedicated ground unit without requiring separate periodic structure layers. This integration simplifies the manufacturing process, reduces the number of fabrication steps, and improves manufacturing stability while maintaining effective energy isolation through the segmented ground design.
Solution Approach 2:
The patent optimizes the geometric parameters of the ground units and their connection structures to achieve effective energy isolation without relying on complex periodic structures. By carefully designing the dimensions, shapes, and spacing of the ground units, the patent achieves good isolation performance with simpler manufacturing requirements and improved production stability.
3Object-affected harmful factors
If periodic structures are used for isolation, then energy isolation is improved, but additional coupling currents are excited and correlated coefficients increase
Solution Approach 1:
The patent extracts and removes the problematic periodic structures that generate additional coupling currents. Instead, it uses directly connected segmented ground units that provide isolation pathways without exciting spurious resonances or coupling currents. This approach maintains energy isolation while eliminating the harmful side effect of additional coupling current generation.
4Object-affected harmful factors
If periodic structures are added for isolation, then energy isolation is improved, but overall antenna array size increases
Solution Approach 1:
The patent nests the ground units within the compact antenna array structure, with each ground unit being integrated into the space surrounding its corresponding antenna element. The segmented ground design allows isolation functionality to be embedded within the existing array footprint, achieving effective energy isolation without increasing the overall antenna array size.
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 design achieves reduced antenna size, improved energy isolation, and enhanced radiation efficiency, enabling efficient multi-antenna integration with compatibility for high data transmission applications.
Implementation Method 1
The four feeding conductor lines excite the second conductor layer to generate at least four resonant modes, and the at least four resonant modes cover at least one identical first communication band
Data Source
AI summary
The disclosure provides a multi-feed antenna including a first conductor layer, a second conductor layer, four supporting conductor structures and four feeding conductor lines. The second conductor layer has a first center position and is spaced apart from the first conductor layer at a first interval. The four electrically connected sections respectively extend from different side edges of the second conductor layer toward the first center position, so that the second conductor layer forms four mutually connected radiating conductor plates. The four feeding conductor lines are all located between the first conductor layer and the second conductor layer. The four feeding conductor lines and the four supporting conductor structures form an interleaved annular arrangement. The four feeding conductor lines excite the second conductor layer to generate at least four resonant modes. The at least four resonant modes cover at least one identical first communication band.