MIMO Antenna Impedance Differentiation for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
MIMO antennas in small terminals face interference issues due to the proximity of multiple antennas, leading to increased size and reduced efficiency, as existing methods to space them apart or use additional devices do not effectively minimize interference.
Innovation Solution
A multiple-input multiple-output (MIMO) antenna design where pairs of antenna elements are directly connected without additional devices, with a feeding unit at one end and grounded at the other, and a connection unit that forms a single body, allowing for independent operation with different electric fields and phases by controlling power supply to each element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are arranged in a MIMO structure to increase data transfer rate, then productivity is improved, but object-generated harmful factors worsen due to electromagnetic interference between closely spaced antennas
Solution Approach 1:
The patent changes the electrical parameters of the antenna elements by providing different impedance values (e.g., 50 ohms and 25 ohms) to adjacent elements. This parameter differentiation modifies the electromagnetic characteristics of each element, reducing mutual interference while maintaining compact spacing for high data transfer rates
2Object-generated harmful factors
If additional devices such as slits are mounted to prevent interference between antennas, then object-generated harmful factors are reduced, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for additional interference-prevention devices by directly addressing the root cause through impedance differentiation. The solution removes complex structural additions (slits, barriers) and replaces them with a simplified electrical parameter configuration that inherently prevents interference
Solution Approach 2:
The antenna elements themselves provide the interference prevention function through their differentiated impedance values. Each element's unique electrical characteristic causes it to operate independently, with the system self-regulating to prevent mutual interference without requiring external control mechanisms or additional components
3Object-generated harmful factors
If antennas are spaced at a predetermined interval to reduce interference, then object-generated harmful factors are reduced, but volume increases
Solution Approach 1:
The patent changes the electrical parameters (impedance values) of the antenna elements to create electrical isolation that replaces physical spacing. By differentiating impedance values, the system achieves interference reduction at much smaller physical dimensions, dramatically reducing the overall volume required for MIMO operation
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 design minimizes mutual interference between antenna elements, reduces the overall size of the antenna system, and enhances radiation patterns by operating antenna elements at orthogonal phases, resulting in improved efficiency and reduced correlation coefficients.
Implementation Method 1
electromagnetic waves radiated from the antennas may interfere with each other
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
A multiple-input multiple-output (MIMO) antenna and an antenna system using the same are provided. The MIMO antenna includes a plurality of antenna elements in which a feeding unit is formed at one end, and another end is connected to a ground, and a connection unit which connects the antenna elements.