Multiple Antenna System Decoupling Optimization
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Solution Overview
Problem
Existing multiple antenna systems for mobile communication struggle with insufficient decoupling between orthogonal polarization planes, particularly due to the influence of reflectors and limitations in phase adjustments between radiators.
Innovation Solution
A multiple antenna system with a phase shifter arrangement and a decoupling adjustment device that allows for variable length, width, shape, or position changes in decoupling elements, synchronized or asynchronous with phase shifter adjustments, ensuring optimal decoupling between polarization planes even at different radiation angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If radiators are arranged in front of a reflector to increase directivity, then directivity is improved, but decoupling between orthogonal polarization planes deteriorates
Solution Approach 1:
A decoupling element is introduced as an intermediary component between the reflector and the radiators. This decoupling element specifically targets and mitigates the harmful coupling effect between orthogonal polarization planes that is caused by the reflector arrangement, while preserving the beneficial directivity enhancement.
Solution Approach 2:
The decoupling element is positioned at a specific distance from the reflector and has specific geometric properties (such as being perpendicular to the reflector and having a width less than the radiator spacing) that are optimized to provide decoupling functionality in the specific region where polarization coupling occurs, without affecting the overall directional radiation pattern.
2Reliability
If decoupling elements are arranged at a certain distance to improve decoupling, then decoupling is improved, but device complexity increases
Solution Approach 1:
The antenna system is segmented into distinct functional components: the reflector for directivity enhancement, the decoupling element for polarization decoupling, and the radiators for signal transmission. This segmentation allows each component to be independently optimized and positioned to achieve both high directivity and effective decoupling without excessive overall complexity.
Data Source
AI summary
A multiple antenna system comprises at least two dipole-type radiators with first and second radiator elements, respectively, which are arranged at a distance from a reflector arrangement. A phase shifter arrangement with a phase shifter adjustment device is connected to the first and second radiator elements to adjust the phase relationships between the first radiator elements and between the second radiator elements. A decoupling arrangement is coupled to a decoupling adjustment device. The decoupling adjustment device is mechanically coupled to the phase shifter adjustment device, so that when the phase shifter adjustment device is moved, the decoupling arrangement: is changeable in its length, width and/or shape; or is changeable in its position, whereby the change of position is accelerated or only partially synchronized with the adjusting movement of the phase-shifting device; or is changeable in its position, wherein the decoupling arrangement is arranged within at least one of the radiators.