Rotatable Polarization Shifter for Antenna Interference Mitigation
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Solution Overview
Problem
The increasing complexity of 5G networks and multiple wireless services require advanced antenna designs to mitigate interference and passive intermodulation (PIM) without impacting each other, which existing technologies struggle to address effectively.
Innovation Solution
Implement polarization shifting devices and systems that adjust or process radiating elements in antennas to minimize interference/PIM by rotating, shifting, or altering their properties, using mechanical and electronic methods to optimize signal projection and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless services, bands, and networks are deployed to increase capacity and throughput, then network capability is improved, but interference and passive intermodulation (PIM) increase
Solution Approach 1:
The patent implements dynamic polarization adjustment where the polarization state of radiating elements is continuously or adaptively changed to optimize signal transmission and mitigate interference. The system can switch between different polarization states (horizontal, vertical, circular) based on channel conditions, allowing the network to maintain high capacity while dynamically avoiding interference through polarization diversity.
Solution Approach 2:
The patent changes the polarization parameter of radiating elements to differentiate between multiple wireless services and networks. By assigning different polarization states to different services or adjusting polarization angles, the system can multiplex multiple transmissions in the same frequency band without causing harmful interference, thus maintaining high network capacity while managing interference through parameter differentiation.
2Ease of manufacture
If antenna designs are simplified to reduce complexity, then ease of manufacture is improved, but ability to mitigate interference and PIM deteriorates
Solution Approach 1:
The patent incorporates movable or adjustable components in the antenna design that allow polarization shifting through mechanical or electromagnetic actuation. These dynamic elements, while adding some complexity, enable the antenna to actively mitigate PIM and interference through real-time polarization adjustment, achieving a balance between manufacturing feasibility and interference mitigation capability.
Solution Approach 2:
The patent designs antennas with multi-functional capabilities where the same radiating element structure can operate in multiple polarization modes. This universal design allows a single antenna component to serve multiple services and frequency bands while maintaining the ability to mitigate PIM and interference, reducing the need for separate specialized antennas and simplifying overall system manufacturing.
3Reliability
If polarization shifting is implemented to reduce interference/PIM, then signal reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical polarization shifting mechanisms with electromagnetic or software-based control methods. Instead of physically rotating antenna elements, the system uses electronic phase shifters, impedance tuning, or signal processing techniques to achieve polarization shifting effects, thereby maintaining signal reliability while significantly reducing mechanical complexity and improving reliability of the shifting mechanism itself.
Solution Approach 2:
The patent implements self-adjusting polarization mechanisms that automatically optimize their polarization state based on received signal quality feedback. The system monitors interference and PIM levels and autonomously adjusts polarization parameters without requiring complex external control systems, thereby improving signal reliability while minimizing the complexity of control architecture.
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
Effectively reduces interference/PIM, enhancing uplink performance and coverage by selectively isolating signals, thereby improving data speeds and reliability in wireless communications.
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
Implementation Method 2
the upper substrate being rotatable relative to the lower substrate to effect polarization adjusting for the radiating element
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.