Polarized Antenna Rotation for Passive Intermodulation Mitigation
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Solution Overview
Problem
The deployment of 5G networks has intensified the need for sophisticated antenna designs that can mitigate passive intermodulation (PIM) and polarization shifting to ensure multiple wireless services and networks coexist without interfering with each other, while maintaining high data rates and coverage.
Innovation Solution
Implementing polarization shifting devices and systems that adjust radiating elements through physical movements, signal processing, or structural changes to minimize interference/PIM by selectively directing signals along different axes, thereby reducing interference impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polarization shifting devices are implemented to adjust radiating elements, then interference/PIM is minimized and uplink performance is enhanced, but device complexity increases
Solution Approach 1:
The patent implements dynamic polarization shifting by rotating radiating elements to different orientations based on detected interference conditions. The system continuously adjusts the polarization state of antenna elements to mitigate PIM and interference, transforming a static antenna system into a dynamic one that adapts to changing electromagnetic environments. This dynamic adjustment resolves the contradiction by maintaining high uplink performance through active polarization control while managing complexity through automated detection and response mechanisms.
Solution Approach 2:
The system employs feedback mechanisms where interference and PIM levels are detected, and this information is used to control polarization shifting of radiating elements. The detection unit monitors signal quality and feeds this information back to the polarization control system, which then adjusts element orientations accordingly. This closed-loop feedback approach ensures optimal uplink performance while automating the complexity management, as the system self-regulates based on real-time conditions.
2Productivity
If multiple wireless services and networks are deployed to increase capacity and throughput, then network capability is improved, but interference and mutual impact between services increase
Solution Approach 1:
The patent applies local quality by implementing polarization-specific interference mitigation for different wireless services. Each service or network can be assigned specific polarization states or orientations, allowing coexistence of multiple services in the same spatial location without mutual interference. This enables high network capacity through service multiplexing while maintaining low interference levels through localized polarization management for each service stream.
Solution Approach 2:
The system resolves service interference by utilizing the polarization dimension as an additional degree of freedom. Instead of treating all signals in a single dimension, the patent employs orthogonal polarization states to separate different wireless services and networks. This dimensional separation allows multiple services to operate simultaneously at high capacity while minimizing mutual interference, as signals on orthogonal polarizations can be independently received and processed.
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
Enhances uplink performance and coverage by minimizing interference/PIM, allowing antennas to operate more efficiently in complex wireless environments.
Implementation Method 1
controlling polarization shifting for radiating elements to mitigate or avoid the interference/PIM
Data Source
AI summary
Aspects of the subject disclosure may include, for example, detecting, by a monitoring system associated with a communication system, signals received at an array of orthogonally-polarized radiating elements of an antenna, causing, via a motorized drive assembly, the array of orthogonally-polarized radiating elements to sequentially rotate to a plurality of positions, obtaining, by a control system from the monitoring system and for each of the plurality of positions, data relating to signals from the array of orthogonally-polarized radiating elements, based on the data, determining, by the control system, an optimal position of the plurality of positions for the array of orthogonally-polarized radiating elements at which an impact of passive intermodulation (PIM) on the communications system is minimized, and controlling, by the control system, the motorized drive assembly to cause the array of orthogonally-polarized radiating elements to occupy the optimal position. Other embodiments are disclosed.