Ring Isolator Module for Compact MIMO Antenna Isolation
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Solution Overview
Problem
MIMO antenna systems face challenges in achieving effective isolation between antennas due to mutual coupling, especially in compact designs, which affects radiation quality and communication interference, particularly when background scanning antennas require proper isolation in shared frequency bands.
Innovation Solution
A MIMO antenna system with an isolator module in a ring configuration, where the background scanning antenna is isolated within an annularly arranged isolator module, and working antennas are outside this isolated space, utilizing dielectric substrates, metallic patches, and metal posts to form an LC parallel resonant circuit that enhances isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between antennas is increased to improve isolation, then antenna isolation is improved, but device size increases and compact design is compromised
Solution Approach 1:
The patent introduces an isolator module as an intermediary component between the background scanning antenna and working antennas. This isolator module includes conductive elements and dielectric materials that actively reduce mutual coupling effects, enabling good isolation performance without requiring large physical distances between antennas.
Solution Approach 2:
The isolator module is strategically positioned only in the specific region between the background scanning antenna and working antennas where mutual coupling occurs. This localized approach provides isolation precisely where needed without affecting other parts of the device, maintaining compact overall dimensions while improving antenna isolation performance.
2Volume of moving object
If multiple antennas are placed in limited space to reduce device size, then device compactness is improved, but mutual coupling increases and radiation quality deteriorates
Solution Approach 1:
The isolator module serves as a mediator that reduces mutual coupling between closely spaced antennas. By inserting this component with specific electromagnetic properties between the background scanning antenna and working antennas, the patent enables compact antenna placement while maintaining good radiation quality through reduced interference.
3Adaptability or versatility
If a background scanning antenna is added to detect interference, then wireless communication ability is improved, but isolation requirements increase and device complexity increases
Solution Approach 1:
The isolator module is designed to provide isolation for both the background scanning antenna and working antennas across multiple frequency bands (2.4 GHz and 5 GHz). This multi-functional design enables the background scanning function to be implemented without requiring separate isolation structures for different antenna types, reducing overall device complexity.
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 effectively increases isolation between the background scanning antenna and working antennas, maintaining radiation quality and reducing electromagnetic interference, while allowing for compact device designs and easy adjustment of operating bands.
Implementation Method 1
utilizing dielectric substrates, metallic patches, and metal posts to form an LC parallel resonant circuit that enhances isolation
Implementation Method 2
The mutual coupling effect of adjacent antennas reduces isolation between the antennas
Data Source
AI summary
A multi-input multi-output (MIMO) antenna system includes a metal plate, a background scanning antenna, a plurality of working antennas, and an isolator module. The isolator module is mountable on the metal plate and includes a plurality of isolators that are in a ring configuration to form an isolated space therein, so that the background scanning antenna can be located in the isolated space and a plurality of working antennas are located outside of the isolated space, thereby ensuring good isolation of the background scanning antenna from the working antennas by the design of the isolator module.