Antenna Polarization Tuning for Intermediate-Field PIM Control
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Solution Overview
Problem
Current antenna technologies face challenges in effectively mitigating interference and passive intermodulation (PIM) in wireless communications systems, particularly in the intermediate field region, which affects uplink performance and coverage.
Innovation Solution
The implementation of an interference/PIM cancellation system that detects interference/PIM in the intermediate, near-field, and far-field regions by performing polarization adjusting and phase shifting/delaying of antenna components, such as radiating elements, to minimize interference impact, using mechanisms like physical rotation, shifting, and signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polarization adjusting is performed to mitigate PIM in the intermediate field region, then uplink performance is improved, but downlink signal quality may be affected
Solution Approach 1:
The patent applies different polarization adjustments to different antenna elements based on their specific PIM characteristics and spatial locations. Each antenna element's polarization is optimized locally to mitigate PIM in the intermediate field region while maintaining downlink performance in other regions, rather than applying a uniform adjustment across all elements.
Solution Approach 2:
The system dynamically adjusts polarization parameters based on real-time PIM detection results and operating conditions. The polarization state is continuously optimized to adapt to changing interference patterns, allowing the system to mitigate PIM when it affects uplink performance while minimizing impact on downlink signals when conditions permit.
2Reliability
If antenna components are physically rotated or shifted to control interference reception, then PIM mitigation is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical rotation and shifting mechanisms with electronic polarization adjustment through signal processing. Instead of physically moving antenna elements, the system uses electronic means to achieve the same interference mitigation effect, significantly reducing mechanical complexity while maintaining PIM mitigation capability.
Solution Approach 2:
The system changes polarization parameters electronically to achieve PIM mitigation without physical movement of antenna components. By adjusting polarization state through signal processing and phase shifting, the system achieves interference control while avoiding the complexity of mechanical adjustment mechanisms.
3Reliability
If polarization adjusting is applied across all field regions, then comprehensive interference mitigation is achieved, but impact on downlink signals increases
Solution Approach 1:
The patent applies polarization adjusting selectively in the intermediate field region where PIM primarily occurs, rather than uniformly across all field regions. This localized approach targets PIM mitigation where it is most needed while leaving downlink signals in other regions largely unaffected, thus reducing overall energy loss.
Solution Approach 2:
The system applies polarization adjusting to the extent necessary to mitigate PIM in the intermediate field region without over-adjusting. By applying partial action only where PIM interference occurs rather than excessive adjustment across all regions, the system achieves adequate PIM mitigation while minimizing unnecessary impact on downlink signals.
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
This approach enables effective mitigation of interference/PIM, improving uplink performance and coverage by selectively controlling the reception of interference, thereby optimizing the antenna system's performance across various field regions without significantly impacting downlink signals.
Implementation Method 1
performing polarization adjusting and phase shifting/delaying of antenna components, such as radiating elements
Implementation Method 2
performing polarization adjusting and phase shifting/delaying of antenna components
Data Source
AI summary
Aspects of the subject disclosure may include, for example, obtaining data regarding passive intermodulation (PIM) detected in a received communication signal, and performing polarization adjusting for a communications system such that an impact of the PIM on the communications system is minimized. Other embodiments are disclosed.