Multi-Band Polarization Rotation for Antenna Interference Mitigation
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Solution Overview
Problem
Interference from unexpected sources negatively impacts wireless communication systems, leading to reduced throughput, dropped calls, and traffic congestion, and existing solutions like adding communication nodes or antenna steering are inadequate.
Innovation Solution
Implementing a radio frequency polarization shifting module (RPM) that adjusts orthogonal signals in the RF domain, using hybrid couplers and mechanically-adjustable phase-shifting couplers to rotate polarizations without affecting orthogonality, thereby mitigating or avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If more communication nodes are added to address interference, then system coverage and capacity improve, but device complexity and system cost increase
Solution Approach 1:
The patent changes the polarization parameter of existing antenna elements to mitigate interference. By adjusting the polarization rotation angle of antenna elements, the system can differentiate between desired signals and interferers without adding more communication nodes, thus improving adaptability while maintaining device complexity at acceptable levels
Solution Approach 2:
The patent implements dynamic polarization adjustment where antenna elements can change their polarization states in real-time based on interference conditions. This dynamic capability allows the system to adapt to varying interference environments without requiring additional fixed infrastructure, resolving the contradiction between coverage and complexity
2Object-affected harmful factors
If antenna steering techniques are used to avoid interferers, then interference mitigation improves, but device complexity and operational constraints increase
Solution Approach 1:
Instead of changing antenna position through steering, the patent changes the polarization parameter of stationary antenna elements. This approach achieves interference mitigation by rotating the polarization angle of antenna elements, avoiding the mechanical complexity of steering mechanisms while still separating desired signals from interferers
Solution Approach 2:
The patent replaces mechanical antenna steering with electromagnetic polarization rotation. By using polarization shifting in the RF domain rather than physical movement, the system achieves interference avoidance without the mechanical complexity, wear, and operational constraints associated with moving parts
3Object-affected harmful factors
If polarization rotation is applied across all frequency bands, then interference mitigation improves, but signal orthogonality and system performance deteriorate
Solution Approach 1:
The patent applies polarization rotation selectively to specific frequency bands where interference is detected, rather than uniformly across all bands. By identifying interferer frequency ranges and applying polarization rotation only to affected bands, the system maintains signal orthogonality for non-affected bands while still achieving interference mitigation where needed
Solution Approach 2:
The patent segments the frequency spectrum into affected and non-affected bands, applying different polarization rotation strategies to each segment. This segmentation allows the system to preserve orthogonality in clean bands while actively mitigating interference in contaminated bands, resolving the contradiction between interference reduction and signal integrity
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 signal-to-interference-plus-noise ratio (SINR) by selectively extracting or minimizing interference, improving communication performance and coverage, and reducing the need for additional system implementation requirements.
Implementation Method 1
adjusting orthogonal signals in a radio frequency (RF) domain to rotate polarizations of the orthogonal signals
Data Source
AI summary
Aspects of the subject disclosure may include, for example, obtaining data regarding interference originating from one or more interference sources, and electronically rotating polarizations of signals relating to crossed-dipole radiating elements of an antenna system, the antenna system operating in multiple frequency bands, the electronically rotating being performed for a select number of frequency bands of the multiple frequency bands and facilitating mitigation of the interference. Other embodiments are disclosed.