Planar Antenna With Notched Ground Pattern For MIMO
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Solution Overview
Problem
In MIMO communications systems, achieving high transmission speed on small information terminal devices is hindered by spatial constraints and mutual interference among multiple antennas, which requires significant space and increases the size of the antennas.
Innovation Solution
An integral-type planar antenna with multiple radiating elements and a ground pattern featuring notches between them, reducing electromagnetic interaction and allowing for independent operation of each element without excessive space, thereby minimizing size and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are installed to increase transmission speed in MIMO systems, then data transfer speed is improved, but spatial constraints on small terminal devices are violated and device size increases
Solution Approach 1:
The ground plane is segmented by introducing notches that divide it into multiple isolated ground regions. Each radiating element is associated with its own isolated ground region, allowing multiple antennas to be closely spaced without mutual interference while maintaining compact overall size
Solution Approach 2:
The notched ground structure creates locally differentiated electromagnetic environments for each radiating element. By modifying the ground plane geometry locally around each element through notches, each antenna experiences a unique electromagnetic characteristic that reduces coupling and enables compact integration
2Volume of moving object
If multiple antennas are installed close together to save space, then device size is reduced, but electromagnetic interference and coupling among antennas increase
Solution Approach 1:
The ground plane is segmented by introducing notches that divide it into multiple isolated ground regions. Each radiating element is associated with its own isolated ground region, allowing multiple antennas to be closely spaced without mutual interference while maintaining compact overall size
Solution Approach 2:
The notched ground structure acts as an intermediary that mediates the electromagnetic interaction between adjacent radiating elements. The notches serve as electromagnetic barriers that control and reduce coupling between elements, enabling close spacing without excessive interference
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 enables a compact, lightweight antenna with reduced interference, supporting MIMO communications systems and wireless LAN applications by minimizing the degree of coupling among radiating elements, thus enhancing transmission speed and usability.
Implementation Method 1
notches can be formed in the ground pattern between the radiating elements, thereby reducing electromagnetic interaction among the radiating elements
Data Source
AI summary
An antenna consisting of a single small and lightweight package, where each radiating element operates independently with reduced interference among the radiating elements. An integrated multi-element planar antenna includes a ground pattern 2 with a notch 2b formed at an end 2a, first radiating element 3 placed on one side of the notch 2b and equipped with a feeder 5, and second radiating element 4 placed on the other side of the notch 2b and equipped with a feeder 5. For example, inverted F antennas are used as the first radiating element 3 and second radiating element 4. The first radiating element 3 and second radiating element 4 are placed symmetrically about the notch 2b such that separation distance will be the largest at locations where their radiation fields are the highest.