Rotatable Polarization Shifter for Antenna Interference Mitigation
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Solution Overview
Problem
Current antenna designs face challenges in mitigating interference/passive intermodulation (PIM) in 5G networks, particularly due to the increasing complexity of multiple wireless services and bands coexisting without impacting each other, which affects signal quality and performance.
Innovation Solution
The implementation of polarization shifting devices and systems that adjust the physical position or electronic processing of radiating elements in antennas to selectively mitigate or avoid interference/PIM by rotating or shifting radiating elements, altering signal phases and amplitudes, or modifying structural properties to minimize interference reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless services and bands are deployed to increase network capacity and throughput, then network服务能力 is improved, but interference and passive intermodulation (PIM) between signals increase
Solution Approach 1:
The patent implements dynamic polarization adjustment where the polarization state of radiating elements is continuously or adaptively changed based on detected interference conditions. This allows the antenna system to dynamically respond to varying interference environments, selecting optimal polarization states to mitigate PIM and interference while maintaining high network capacity across multiple services and bands.
Solution Approach 2:
The patent changes the polarization parameter of radiating elements to differentiate between desired signals and interfering signals. By adjusting polarization angles or states, the system can selectively receive or reject signals based on their polarization characteristics, thereby mitigating interference and PIM effects while maintaining multi-band and multi-service operational capability.
2Adaptability or versatility
If antenna designs are made more complex to meet multiple functions, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent makes radiating elements universally functional by enabling them to operate across multiple frequency bands and service types through dynamic polarization adjustment. Instead of designing separate antennas for different functions, a single antenna system with adjustable polarization characteristics can adapt to serve multiple wireless services and bands, reducing overall system complexity while maintaining versatility.
Solution Approach 2:
The patent introduces dynamic polarization control mechanisms that allow radiating elements to adapt their characteristics in real-time based on operational requirements. This dynamic capability enables a relatively simple physical structure to achieve complex multi-functional performance by changing operational parameters rather than physical configuration.
3Reliability
If polarization shifting is used to mitigate interference, then signal quality is improved, but additional control mechanisms are required
Solution Approach 1:
The patent implements feedback-based polarization control where the system monitors signal quality and interference levels, then automatically adjusts polarization states of radiating elements in response. This closed-loop control mechanism improves signal quality by dynamically mitigating interference while keeping the control system relatively simple by only adjusting polarization parameters based on measured conditions.
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 effectively reduces interference/PIM, improving uplink performance and coverage by optimizing signal reception and transmission patterns, thereby enhancing overall network efficiency and reliability.
Implementation Method 1
a dielectric layer residing between the lower substrate and the upper substrate, the dielectric layer coupling the first transmission line with the third transmission line and coupling the second transmission line with the fourth transmission line
Data Source
AI summary
Aspects of the subject disclosure may include, for example, a polarization shifter including a lower substrate having disposed thereon first and second transmission lines for coupling to a feed network, an upper substrate having disposed thereon third and fourth transmission lines for respective communicative coupling to orthogonally-polarized elements of a radiating element, and a dielectric layer residing between the lower substrate and the upper substrate, the upper substrate being configured to mechanically couple to the radiating element, the dielectric layer coupling the first transmission line with the third transmission line and coupling the second transmission line with the fourth transmission line, the upper substrate being rotatable relative to the lower substrate to effect polarization adjusting for the radiating element to facilitate avoidance of interference or passive intermodulation (PIM). Other embodiments are disclosed.