Co-located Orthogonal Dipole Antennas for High Isolation
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Solution Overview
Problem
Existing antenna systems fail to achieve high isolation and polarization diversity between two antennas within a minimum volume, which is crucial for efficient wireless communication, especially in MIMO applications.
Innovation Solution
The use of co-located dipole antennas with mutually-orthogonal polarizations, comprising dielectric substrates, dipole arms, antenna baluns, metallization sections, and feed points, allows for high isolation and polarization diversity in a compact volume, enabling efficient wireless communication across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If two antennas are placed close together to reduce device size, then the volume occupied is reduced, but the isolation between antennas deteriorates
Solution Approach 1:
The patent employs co-located dipole antennas with mutually-orthogonal polarizations, transitioning from spatial separation in one dimension to orthogonal orientation in three-dimensional space. This dimensional approach allows antennas to be positioned at the same location while maintaining high isolation through perpendicular polarization directions, thereby reducing occupied volume without sacrificing isolation performance.
2Volume of moving object
If two antennas are placed close together to reduce device size, then the volume occupied is reduced, but the polarization diversity deteriorates
Solution Approach 1:
The invention utilizes orthogonal polarization directions (vertical and horizontal) as an additional degree of freedom. By orienting dipole antennas perpendicular to each other, the system achieves polarization diversity without requiring spatial separation, thus maintaining adaptability while minimizing the volume occupied by the antenna system.
3Reliability
If antennas are co-located with orthogonal polarizations to achieve high isolation, then the isolation improves, but the device complexity increases
Solution Approach 1:
The patent merges two antenna functions into a single co-located structure with orthogonal polarizations. By combining the antenna elements and their supporting structures into an integrated assembly, the design achieves high isolation through orthogonal orientations while reducing overall structural complexity compared to separated antenna configurations.
Data Source
AI summary
An antenna system with co-located dipole antennas with mutually-orthogonal polarization is disclosed herein. The two antennas have planar geometry for the entire antenna and the two antennas are co-located in two mutually-orthogonal planes which provides an antenna solution for wireless communications with high isolation between the two antennas and polarization diversity in a minimum volume occupied. The two antennas operate in the same wireless communications band or in different bands.