Multi-Loop Antenna System for MIMO Gain and Space Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antenna systems for wireless devices have a three-dimensional structure that occupies more space, reducing available space for other components and exhibit lower gain and directivity in frequency bands like 2.4 GHz and 5 GHz.
Innovation Solution
A multi-loop antenna system with loop antennas arranged on a substrate, where each antenna has a first radiator portion for one frequency band and a second radiator portion for another, with a grounding plane to enhance gain and directivity, and a system module to reflect radiation for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If planar inverted-F antennas or monopole antenna systems are used, then the antenna system can be disposed in a housing, but the three-dimensional structure occupies larger space, reducing space available for other electronic components
Solution Approach 1:
The patent transitions from three-dimensional planar inverted-F antenna structures to two-dimensional loop antenna structures printed on a flat substrate. This dimensional reduction allows the antenna system to occupy significantly less volume within the housing while maintaining functionality, thereby increasing the space available for other electronic components.
Solution Approach 2:
The patent replaces traditional mechanical three-dimensional antenna structures with planar printed circuit board-based loop antennas. This substitution eliminates the need for complex three-dimensional mounting structures and reduces the overall volume occupied by the antenna system while improving integration with the housing.
2Adaptability or versatility
If conventional monopole antenna systems are used, then the antenna system can support multiple-input-multiple-output wireless communications, but the gain values are limited to 3 dBi to 5 dBi with lower directivity
Solution Approach 1:
The patent divides each antenna element into multiple loop structures with different orientations and sizes. This segmentation allows each antenna element to support multiple frequency bands and polarization modes, enabling MIMO functionality while increasing gain and directivity through constructive interference of the segmented loop radiations.
Solution Approach 2:
The patent employs composite loop antenna structures combining different loop geometries (circular, rectangular, triangular) and orientations within a single antenna element. This composite approach enables the antenna to achieve higher gain values and improved directivity across multiple frequency bands while maintaining MIMO capability through diverse radiation patterns.
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 multi-loop antenna system achieves higher gain and directivity, allowing for more efficient use of space and improved radiation patterns, making it suitable for multiple-input-multiple-output communications in wireless local area networks.
Implementation Method 1
The system module has a grounding plane that faces toward and that is spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the antenna module so as to enhance gain and directivity thereof
Data Source
AI summary
A multi-loop antenna system includes: a plurality of loop antennas disposed on a substrate and arranged such that each of extending lines extending respectively from geometric centers of the loop antennas to a center point that is bounded by the loop antennas has a predetermined length, and that each of the loop antennas is spaced apart from an adjacent one of the same by a predetermined distance; and a system module facing toward and being spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the loop antennas. Each of the loop antennas includes first and second radiator portions operable in respective frequency bands; the former having opposite ends that respectively serve as signal-feed and grounding sections; the latter having opposite ends that are connected respectively to the signal-feed and grounding sections.