Multi-Antenna MIMO System Using Vertical Antennas for Isolation
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Solution Overview
Problem
Existing multi-input multi-output (MIMO) wireless communication systems do not specify a clear arrangement for multi-antennas, limiting the complete realization of MIMO advantages such as enhanced bandwidth efficiency and transmission rate.
Innovation Solution
A multi-antenna configuration comprising a substrate with a first and second planar antenna and a vertical antenna, where the vertical antenna is placed between the planar antennas to achieve three-dimensional polarization diversity and enhance isolation, utilizing monopole and dipole antennas to generate orthogonal time-varying current directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are placed close together to reduce device size, then the size of the electronic product is reduced, but the isolation between antennas deteriorates
Solution Approach 1:
The patent employs three-dimensional polarization diversity by orienting antennas in different spatial dimensions - planar antennas in the horizontal plane and vertical antennas in the vertical direction. This dimensional separation allows antennas to be placed closer together while maintaining isolation through orthogonal polarization directions, effectively resolving the contradiction between compact size and antenna isolation.
2Device complexity
If antennas are arranged without clear specification, then device complexity is reduced, but the performance of MIMO system deteriorates
Solution Approach 1:
The patent segments the antenna system into distinct functional groups - planar antennas for horizontal polarization and vertical antennas for vertical polarization. This segmentation provides clear arrangement specifications that enable MIMO performance while maintaining manageable device complexity through organized, modular antenna placement.
Solution Approach 2:
By introducing vertical dimension to the antenna arrangement, the patent creates a three-dimensional antenna layout that clearly specifies spatial relationships. This dimensional specification enables complete MIMO advantage realization through orthogonal polarizations while keeping the arrangement systematic and not overly complex.
3Area of stationary object
If planar antennas are placed adjacent to each other, then area utilization is improved, but the polarization diversity deteriorates
Solution Approach 1:
The patent transitions from two-dimensional planar antenna placement to three-dimensional arrangement by introducing vertical antennas perpendicular to the substrate. This dimensional change enables both efficient substrate area utilization and complete polarization diversity through orthogonal orientations in three-dimensional space.
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 configuration achieves three-dimensional polarization diversity and increased isolation, enhancing the efficiency of the multi-antenna system by ensuring high isolation between antennas and improving data throughput and link range.
Implementation Method 1
a vertical antenna, wherein the vertical antenna includes a conductor formed on the substrate and between the first planar antenna and the second planar antenna, and a radiator perpendicular to the substrate and coupled to the conductor
Data Source
AI summary
A multi-antenna for a multi-input multi-output wireless communication system includes a substrate, a first planar antenna formed on the substrate along a first direction, a second planar antenna formed on the substrate along a second direction, and a vertical antenna including a conductor formed on the substrate and between the first planar antenna and the second planar antenna, and a radiator perpendicular to the substrate and coupled to the conductor.