Dual Polarization Shifter for RF Interference Isolation
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Solution Overview
Problem
Current wireless communication systems face interference from unexpected sources, leading to reduced performance, throughput, and increased traffic congestion, which existing solutions like additional communication nodes or antenna steering techniques do not adequately address.
Innovation Solution
The implementation of a radio frequency (RF) polarization shifting module/system (RPM) that rotates orthogonal signals' polarizations without affecting their orthogonality, using hybrid couplers and mechanically-adjustable dual simultaneous phase-shifting couplers to mitigate or avoid interference/passive intermodulation (PIM) by selectively extracting signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional communication nodes are added to address interference issues, then system coverage and capacity are improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the polarization parameter of existing signals to separate interfered signals from interference. By rotating the polarization of orthogonal signals, the system can selectively extract desired signals without adding physical infrastructure, thus improving productivity while avoiding increased device complexity
Solution Approach 2:
The patent replaces physical expansion (adding more nodes) with a signal processing mechanism (polarization rotation). This substitution allows interference mitigation through mathematical/algorithmic operations on signal properties rather than mechanical addition of communication infrastructure
2Reliability
If antenna steering techniques are used to avoid interferers, then signal quality is improved, but adaptability to different interference scenarios deteriorates
Solution Approach 1:
The patent implements dynamic polarization rotation that can be adjusted based on interference characteristics. The system can rotate polarizations by different angles for different signals and adaptively select optimal polarization states, providing flexibility to handle various interference scenarios rather than fixed steering patterns
Solution Approach 2:
The patent applies different polarization rotation operations to different orthogonal signals individually. Each signal can be rotated by a customized angle based on its specific interference conditions, allowing localized optimization for each signal path rather than uniform steering across all signals
3Reliability
If polarization rotation is applied to rotate orthogonal signals' polarizations, then signal-to-interference ratio is improved, but device complexity increases due to hybrid couplers and phase-shifting mechanisms
Solution Approach 1:
The patent divides the polarization rotation function into separate processing stages for different orthogonal signals. Each signal path has its own hybrid coupler and phase shifter configuration, allowing independent optimization and simplifying the overall system design by breaking down the complex polarization manipulation into manageable segments
Solution Approach 2:
The patent uses hybrid couplers as intermediary devices to facilitate polarization rotation. These couplers act as mediators that combine and separate signals in a controlled manner, enabling the desired polarization transformation while maintaining signal integrity and providing a standardized interface that simplifies system integration
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 enhances the signal-to-interference-plus-noise ratio (SINR) by effectively isolating signals from interference, improving communication channel performance and reducing PIM-related issues in both short-range and long-range wireless communications.
Implementation Method 1
a dual shifter, the dual shifter being mechanically adjustable to effect polarization rotation of signals relating to a dual-polarized pair of crossed-dipole elements
Implementation Method 2
The apparatus may include a pair of hybrid couplers and a dual shifter
Implementation Method 3
dual simultaneous phase-shifting couplers to mitigate or avoid interference/passive intermodulation (PIM) by selectively extracting signals
Data Source
AI summary
Aspects of the subject disclosure may include, for example, receiving, by a double trombone shifter device, signals relating to one or more crossed-dipole radiating elements of an antenna system, performing, by the double trombone shifter device, polarization rotation of the signals to derive output signals having polarizations that are rotated in a manner that results in a virtual physical rotation of the one or more crossed-dipole radiating elements, and providing, by the double trombone shifter device, the output signals to enable avoidance of interference. Other embodiments are disclosed.