MIMO Antenna Dipole Elements Orthogonal Ground Plane Coupling
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Solution Overview
Problem
MIMO antennas face challenges in reducing installation space while lowering the correlation coefficient between antenna elements, as releasing monopole antenna elements from the ground plane increases space requirements.
Innovation Solution
The use of dipole antenna elements with radiating elements arranged orthogonally or parallel to the ground plane, coupled by electromagnetic field coupling, allows for reduced installation space and lower correlation coefficients without the need for physical contact, facilitating impedance matching and improved antenna gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monopole antenna elements are released from the ground plane, then the correlation coefficient between antenna elements is lowered, but the installation space is expanded
Solution Approach 1:
The patent replaces the mechanical/physical contact connection between monopole antenna elements and the ground plane with electromagnetic field coupling between dipole antenna elements. This substitution allows the antenna elements to achieve proper grounding and impedance matching through electromagnetic coupling rather than direct physical contact, thereby reducing installation space while maintaining low correlation coefficients
Solution Approach 2:
The patent transitions from using monopole antenna elements (single-dimensional connection to ground plane) to dipole antenna elements (two-dimensional configuration with orthogonal or parallel radiating elements). This dimensional change enables the antenna to achieve low correlation coefficients without requiring release from the ground plane, as the dipole configuration provides multiple coupling paths
2Area of stationary object
If monopole antenna elements are kept connected to the ground plane, then the installation space is reduced, but the correlation coefficient between antenna elements cannot be lowered
Solution Approach 1:
The patent changes the fundamental parameters of the antenna configuration by switching from monopole to dipole elements and adjusting the orientation (orthogonal or parallel) of the radiating elements. These parameter changes enable the system to achieve low correlation coefficients while maintaining compact installation space through optimized electromagnetic coupling
3Area of stationary object
If dipole antenna elements are used with orthogonal radiating elements, then the installation space is reduced and correlation coefficient is lowered, but impedance matching becomes more complex
Solution Approach 1:
The patent applies local quality by optimizing the specific configuration of dipole antenna elements with orthogonal or parallel radiating elements positioned at specific locations and orientations. This localized optimization of element placement and orientation achieves both compact size and low correlation coefficients while managing impedance matching through precise geometric arrangement
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 configuration effectively reduces the installation space and correlation coefficient between dipole antenna elements, enhancing antenna performance and efficiency, particularly in multiband applications.
Implementation Method 1
coupled by electromagnetic field coupling, allows for reduced installation space and lower correlation coefficients without the need for physical contact
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A MIMO antenna includes a ground plane (70) and dipole antenna elements (10, 20) that are arranged in the vicinity of the ground plane (70). The dipole antenna element (10) includes a radiating element (11) that has conductor portions (12, 13) extending along an outer edge portion (71) of the ground plane (70), and a feeding portion (16) that feeds the radiating element (11). The dipole antenna element (20) includes a radiating element (21) that has conductor portions (22, 23) extending along an outer edge portion (71) of the ground plane (70), and a feeding portion (26) that feeds the radiating element (21).