MIMO Antenna System with Reflector for Sector Coverage
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Solution Overview
Problem
Current MIMO antenna implementations face challenges with mutual coupling among multiple antennas, leading to reduced performance and throughput, especially in multiple radio access points, where space constraints and interference become significant issues.
Innovation Solution
A MIMO antenna system with a plurality of multi-band antenna elements connected to a radio in a MIMO configuration, utilizing a reflector to concentrate signal communication in a sector, providing a sector coverage pattern and enhancing gain and isolation between adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are used in MIMO configuration, then reception efficiency and throughput are improved, but mutual coupling among antennas degrades performance and reduces throughput
Solution Approach 1:
The patent divides the antenna system into multiple independent antenna elements (first, second, third, and fourth antenna elements) arranged in a specific geometric configuration. Each antenna element operates semi-independently with controlled mutual coupling, allowing the system to achieve MIMO diversity while managing interference through spatial separation and structured arrangement.
2Productivity
If multiple radios are used in an access point, then throughput is increased, but space constraints and mutual coupling problems are magnified
Solution Approach 1:
The patent transitions from planar antenna arrangements to a three-dimensional configuration by positioning antenna elements at different heights and spatial locations (e.g., first and second antenna elements at different heights, third and fourth antenna elements at different heights). This vertical dimensionality allows multiple radios to operate with reduced mutual coupling while fitting within compact access point enclosures.
3Reliability
If antennas are placed in proximity to achieve MIMO, then reception efficiency improves, but mutual coupling increases and degrades performance
Solution Approach 1:
The patent optimizes specific geometric parameters including the spacing distances between antenna elements (e.g., distance between first and second antenna elements, distance between third and fourth antenna elements) and their relative orientations. By carefully controlling these spatial parameters, the system achieves optimal balance between maintaining reception efficiency through proximity and minimizing mutual coupling through adequate separation.
4Reliability
If access points are spaced apart to reduce interference, then channel interference is reduced, but coverage area is limited
Solution Approach 1:
The patent combines multiple antenna elements into a single integrated MIMO system within each access point. By merging the functionality of multiple antennas and radios into unified MIMO configurations, the system achieves interference reduction through spatial diversity and signal processing while maintaining compact form factors that enable denser access point deployment for extended coverage.
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 efficient operation of MIMO antennas in multiple radio access points without significant space constraints, improving coverage and quality of service (QOS) by reducing mutual coupling and increasing directional transmission and reception gain, thus extending the coverage area.
Implementation Method 1
A reflector is formed on the RF module to contain the plurality of multiband antenna elements and to concentrate signal communication in a sector
Data Source
AI summary
A multiple input, multiple output (“MIMO”) antenna system is provided for operation on a radio frequency (“RF”) module that may be used in a wireless access device. The MIMO antenna system includes a plurality of multi-band antenna elements connected to a radio in a MIMO configuration. The multi-band antenna elements and the radio are configured to operate on an RF module. A reflector is formed on the RF module to contain the plurality of multi-band antenna elements and a common director is positioned in front of the multi-band antenna elements to concentrate signal communication in a sector. The plurality of multi-band antenna elements are oriented to provide a sector coverage pattern formed by beam patterns generated by each of the multi-band antenna elements.