Multiband MIMO Radiating Structure With Miniature Radiation Boosters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless handheld devices face challenges in achieving MIMO operation without large antenna elements, requiring enhanced radioelectric performance, robustness, and reduced size, while also dealing with space constraints and customization issues for each device platform.
Innovation Solution
The integration of miniature radiation boosters within a wireless handheld device enables MIMO operation across multiple frequency bands, utilizing a ground plane as a radiator and arranging radiation boosters to achieve low correlation and efficient radiation modes, eliminating the need for traditional antenna elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antenna elements are used for MIMO operation, then radioelectric performance is improved, but device size and volume increase
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated radiating structure that supports MIMO operation. The radiating structure includes multiple radiating elements formed on a substrate, where elements are coupled through electromagnetic coupling rather than physical connection, reducing overall device volume while maintaining MIMO performance
Solution Approach 2:
The patent implements nested radiating elements where smaller radiating elements are positioned within or adjacent to larger ones. This nesting approach allows multiple frequency bands to be supported within a compact footprint, enabling MIMO operation without proportionally increasing device volume
2Adaptability or versatility
If multiple antenna elements are integrated for MIMO, then MIMO operation capability is improved, but device complexity increases
Solution Approach 1:
The patent designs a universal radiating structure that can operate across multiple frequency bands and support MIMO functionality. The radiating elements are configured to support both single-band and multi-band operation, and can provide both transmit and receive functions, reducing overall system complexity despite enhanced capabilities
Solution Approach 2:
The patent segments the radiating structure into multiple independent but coupled radiating elements. Each element can be independently designed for specific frequency bands, yet they work together as an integrated MIMO system. This segmentation allows modular design and simplifies the integration process
3Volume of moving object
If radiating structure volume is reduced, then device compactness is improved, but radioelectric performance deteriorates
Solution Approach 1:
The patent uses thin substrate layers to support the radiating elements, reducing the overall volume of the radiating structure. The thin film substrate maintains electrical connectivity and mechanical support while minimizing the thickness and volume occupied by the radiating system
Solution Approach 2:
The patent transitions from traditional three-dimensional antenna structures to a planar two-dimensional configuration. The radiating elements are arranged on a flat substrate surface, utilizing the surface area rather than volume for radiation, thereby reducing the volume occupied while maintaining or improving radioelectric performance
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 solution allows for compact, robust, and cost-effective wireless devices with enhanced MIMO performance, supporting multiple frequency bands and standards, while reducing the volume dedicated to radiating structures and enabling standardized solutions across various device platforms.
Implementation Method 1
a radiation booster arranged to couple electromagnetic energy to said ground plane
Data Source
AI summary
A wireless handheld or portable device includes a communication module with a MIMO system that provides multiband MIMO operation in first and second frequency bands. The MIMO system includes first and second radiating systems, a ground plane common to the two radiating systems, first and second radio frequency systems, and a MIMO module. The first and second radiating systems both operate in the first and second frequency bands and respectively include first and second radiating structures coupled to the ground plane, which respectively have first and second radiation boosters that fit in an imaginary sphere having a diameter smaller than ¼ of a diameter of a radiansphere of a longest wavelength of the first frequency band. The first and second radiofrequency systems respectively modify impedance of the first and second radiating structures to provide impedance matching to the first and second radiating systems within the first and second frequency bands.