Multi-Feed Antenna Slit Structure for Matching and Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Designing a broadband antenna unit into a highly integrated multi-antenna array while achieving good matching and isolation is challenging due to mutual coupling interference, which leads to attenuation of radiation characteristics and decreased data transmission rates.
Innovation Solution
An integrated multi-feed antenna design featuring a first conductor layer, a second conductor layer with a closed slit structure, and feeding conductor lines that excite resonant modes to cover a wireless communication band, optimizing impedance matching and isolation through a slit interval and center region design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple antennas are integrated into an antenna array, then integration density is improved, but mutual coupling interference increases causing isolation to deteriorate
Solution Approach 1:
A ground isolation structure is introduced as an intermediary element between adjacent antennas. This structure includes a ground conductor layer with a first conductor layer and a second conductor layer spaced apart, forming isolation regions that block coupling current paths. The isolation structure acts as a mediator that prevents harmful electromagnetic coupling while maintaining antenna integration density.
Solution Approach 2:
The ground isolation structure divides the ground area into separate isolation regions for different antenna elements. The first conductor layer and second conductor layer are segmented with spacing to create discrete isolation zones that prevent coupling between specific antenna pairs while allowing independent operation of each antenna element.
2Object-generated harmful factors
If ground area structures are added to improve isolation, then isolation between antennas is improved, but additional coupling currents are excited increasing correlation coefficients
Solution Approach 1:
The isolation structure is designed with localized properties where the first conductor layer and second conductor layer are positioned at specific heights and spaced at specific distances to create optimal isolation regions. The local geometry and material properties are optimized to block coupling currents without creating unwanted resonant modes that would increase correlation coefficients.
3Object-generated harmful factors
If ground isolation structures are added, then isolation is improved, but overall size of the multi-antenna array increases
Solution Approach 1:
Instead of expanding the ground area horizontally to provide isolation, the solution moves into the vertical dimension by spacing the first conductor layer and second conductor layer at different heights. This three-dimensional isolation structure achieves coupling suppression without significantly increasing the planar footprint of the antenna array.
4Object-generated harmful factors
If complex isolation structures are implemented, then isolation is improved, but manufacturing stability decreases increasing production costs
Solution Approach 1:
The ground isolation structure uses standard conductor layers and spacing that can be integrated into existing antenna array manufacturing processes. The same conductor layer technology used for antenna elements is reused for the isolation structure, allowing multi-functionality in the manufacturing process and maintaining production stability without requiring specialized isolation component fabrication.
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 good impedance matching and isolation between resonant modes, enabling multi-antenna compatible integration, suitable for applications in multi-input multi-output, pattern switching, and beam forming antenna systems.
Implementation Method 1
Each of the feeding conductor lines excites the second conductor layer to generate at least one resonant mode. The resonant modes cover at least one identical wireless communication band.
Data Source
AI summary
The disclosure provides an integrated multi-feed antenna, including a first conductor layer, a second conductor layer, and multiple feeding conductor lines. The second conductor layer has a first center position. The second conductor layer has a closed slit structure. The closed slit structure surrounds the first center position to encircle forming a center region. The second conductor layer is spaced apart from the first conductor layer at a first interval. Each of the feeding conductor lines has one end electrically connected or electrically coupled to the second conductor layer, and each has another end electrically connected to a signal source. Each of the feeding conductor lines excites the second conductor layer to generate at least one resonant mode. The resonant modes cover at least one identical wireless communication band.