Tri-Band MIMO Antenna Layout for Low-Coupling Wi-Fi 6E
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dual-band Wi-Fi antennas have poor system throughput, radio coverage, and return loss, and require improved antenna design to support simultaneous transmit and receive operations in next-generation IEEE 802.11ax WLANs with reduced parasitic electromagnetic coupling.
Innovation Solution
A tri-band MIMO antenna system with a conductive ground plane, vertically polarized first antennas for the 5 GHz and 2.4 GHz bands, horizontally polarized second antennas for the 5 GHz band, and vertically polarized third antennas for the 6 GHz band, achieving high isolation, uniform radiation, and efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dual-band Wi-Fi antennas are used, then the antenna system can support basic 2.4 GHz and 5 GHz operations, but the system throughput, radio coverage, and return loss are relatively poor
Solution Approach 1:
The antenna system is segmented into three independent MIMO pairs, each optimized for specific frequency bands. The first MIMO pair handles 2.4 GHz and 5 GHz, the second MIMO pair handles 5 GHz, and the third MIMO pair handles 6 GHz. This segmentation allows each pair to be independently optimized for its designated bands, improving overall system throughput and return loss characteristics without mutual interference.
Solution Approach 2:
The patent introduces operation in the 6 GHz frequency band as an additional dimension beyond the conventional dual-band (2.4 GHz and 5 GHz) operation. This tri-band capability adds a new spectral dimension for data transmission, significantly increasing system throughput and providing additional capacity for high-speed applications.
2Object-generated harmful factors
If conventional dual-band antennas are used, then the design is simpler, but parasitic electromagnetic coupling between antenna pairs is not sufficiently reduced for simultaneous transmit and receive operations
Solution Approach 1:
Each MIMO pair is designed with specific local quality characteristics optimized for its frequency band(s). The first MIMO pair is optimized for 2.4/5 GHz with specific polarization and radiation patterns, the second for 5 GHz with different polarization, and the third for 6 GHz. This localized optimization minimizes parasitic coupling between pairs while maintaining overall system functionality.
Solution Approach 2:
The patent introduces a common ground plane as an intermediary structure that electrically isolates the three MIMO pairs from each other. The ground plane serves as a reference that reduces mutual coupling between the different antenna pairs operating in overlapping frequency bands, enabling simultaneous transmit and receive operations with minimal interference.
3Speed
If the antenna system operates in additional frequency bands (6 GHz), then data transfer rates increase significantly, but the antenna design becomes more complex
Solution Approach 1:
The first MIMO pair is designed with multi-functionality to operate in both 2.4 GHz and 5 GHz bands simultaneously, reducing the need for separate antenna systems for each band. The second MIMO pair is dedicated to 5 GHz operations, and the third to 6 GHz, creating a universal tri-band system that achieves high data transfer rates across multiple frequency ranges.
4Reliability
If vertically polarized and horizontally polarized antennas are used in different MIMO pairs, then cross-pair isolation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric polarization configurations across different MIMO pairs to maximize isolation. The first MIMO pair uses vertical polarization, the second uses horizontal polarization, and the third uses vertical polarization again. This asymmetric arrangement exploits the orthogonal nature of different polarizations to achieve high cross-pair isolation, with the understanding that precise manufacturing is required to maintain the intended polarization orientations.
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 antenna system provides enhanced system throughput, improved radio coverage, and reduced parasitic coupling, enabling faster data rates up to 9607.8 Mbit/sec and supporting QoS-sensitive applications with minimal cross-pair isolation and gain ripple characteristics.
Implementation Method 1
a first MIMO pair of, preferably vertically polarized, first antennas, mounted onto and/or configured to co-act with a top surface of said ground plane, and configured to operate in the 5 GHz frequency band and/or the 2.4 GHz frequency band
Implementation Method 2
dedicated antenna solutions are needed that feature extremely reduced level of parasitic electromagnetic coupling between different antenna pairs
Implementation Method 3
a first MIMO pair of, preferably vertically polarized, first antennas... and a second MIMO pair of, preferably horizontally polarized, second antennas
Data Source
AI summary
The invention relates to a MIMO antenna system for IEEE 802.11 WiFi communications. The invention also relates to a wireless device, such as a wireless access point (AP), a router, a gateway, and/or a bridge, comprising at least one antenna system according to the invention. The invention further relates to a wireless communication system, comprising a plurality of antenna systems according to the invention, and, preferably, a plurality of wireless devices according to the invention.