Multi-Radio Antenna Layout With Orthogonal Polarization Isolation
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Solution Overview
Problem
Existing wireless network devices face challenges in providing efficient MIMO and MU-MIMO communications in ultra-high density environments due to poor scattering, antenna isolation, and interference issues, especially in line of sight conditions, which affect signal uniformity and data rate throughput.
Innovation Solution
The design of an antenna system comprising a plurality of directional antennas with orthogonal polarization and radiation patterns, integrated with an interface matrix, allows for concurrent MIMO/MU-MIMO operations by ensuring isolation between radios and dynamic coverage management, achieving uniform signal fidelity and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radios operate concurrently in a compact form factor WND, then MIMO and MU-MIMO functionality is enabled, but wireless link isolation becomes difficult to achieve
Solution Approach 1:
The patent transitions from relying solely on spatial separation (3D physical distance) to incorporating polarization dimension (orthogonal polarization planes) as an additional isolation mechanism. This allows multiple radios to operate concurrently in a compact form factor while maintaining wireless link isolation through orthogonal polarization relationships between antenna pairs.
Solution Approach 2:
The patent divides the antenna system into multiple independent dual linear and orthogonal polarization pairs, where each pair serves a specific radio. This segmentation allows each radio to have dedicated antenna resources with inherent polarization isolation, enabling MIMO and MU-MIMO functionality while maintaining link isolation in a compact configuration.
2Reliability
If antenna spacing is increased to provide wireless link isolation, then isolation between radios improves, but the form factor of the WND increases
Solution Approach 1:
The patent introduces polarization dimension as an additional isolation mechanism, allowing antennas to be placed in close spatial proximity while maintaining wireless link isolation through orthogonal polarization relationships. This eliminates the need to increase physical antenna spacing to achieve isolation.
Solution Approach 2:
The patent applies different polarization orientations to different antenna pairs, creating local quality differences in the electromagnetic field characteristics. Each antenna pair is optimized with specific polarization directions (e.g., horizontal/vertical, left/right circular) to achieve isolation without increasing physical separation.
3Adaptability or versatility
If polarization diversity is used to enable MIMO in low scatter environments, then MIMO functionality is achieved, but multiple dual linear and orthogonal pair antennas are required
Solution Approach 1:
The patent merges multiple antenna functions into integrated antenna assemblies where dual linear and orthogonal polarization pairs are combined in a unified structure. Each assembly serves multiple radios simultaneously, reducing the overall number of discrete antenna pairs while maintaining MIMO functionality through the combined polarization diversity.
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 enables high-capacity wireless networks with improved signal isolation and uniform coverage, supporting multiple concurrent RF streams with orthogonal polarization, enhancing MIMO and MU-MIMO performance in ultra-high density environments.
Implementation Method 1
The antenna system comprises a plurality of directional antennas with orthogonal polarization and radiation patterns
Data Source
AI summary
A wireless-access point includes a first radio to transmit RF signals in a first channel; a second radio to transmit, simultaneously to transmissions of the RF signals by the first radio, RF signals in a second, non-overlapping channel; and a plurality of planar antennas coupled with corresponding first and second radios to receive the RF signals. First and second planar antennas are coupled with the first radio to receive therefrom, in the first channel, a first RF signal and a second RF signal, respectively. The first planar antenna is arranged with its normal along a first direction. The second planar antenna is arranged with its normal along a second, different direction. A third planar antenna is coupled with the second radio to receive therefrom a third RF signal in the second channel, the third planar antenna being arranged with its normal along a third direction.