Polarized Beam Gain Control in MIMO Antenna Arrays
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Solution Overview
Problem
The alignment and orientation of orthogonal polarizations in MIMO antenna arrays are critical for maintaining high throughput in mmWave wireless communication systems, but physical orientation changes due to user movement significantly impact performance, leading to reduced MIMO rank and throughput.
Innovation Solution
An apparatus with circuitry that varies the gain of RF signals to adjust the orientation of polarized beams, using phase shifters and switches to align orthogonal polarizations with the channel orientation, ensuring maximum antenna gain and decorrelation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If physical orientation of antennas is fixed, then manufacturing precision is improved, but adaptability to environment changes and user movement deteriorates
Solution Approach 1:
The patent applies dynamics by making the antenna polarization orientation adjustable through circuitry that can vary the gain of RF signals. This allows the system to transition from a fixed physical orientation to a dynamically adjustable orientation, resolving the contradiction between manufacturing precision and adaptability to user movement.
Solution Approach 2:
The patent changes the parameter of antenna polarization orientation by varying the gain of RF signals through circuitry. This parameter change enables the system to adapt to different user positions and orientations without requiring physical reconfiguration, thereby maintaining manufacturing precision while improving adaptability.
2Device complexity
If MIMO antenna array uses fixed orthogonal polarizations, then device complexity is reduced, but MIMO performance under environment changes deteriorates
Solution Approach 1:
The patent introduces dynamic adjustability to the MIMO antenna system by enabling variable gain control of RF signals. This allows the orthogonal polarizations to be adjusted in response to environmental changes, improving MIMO performance without significantly increasing device complexity.
Solution Approach 2:
The patent changes the polarization orientation parameter dynamically by varying RF signal gains through circuitry. This parameter adjustment maintains high MIMO performance under varying environmental conditions while keeping the overall system complexity manageable.
3Productivity
If antenna polarization is aligned with channel orientation, then throughput is improved, but cross-couplings between polarizations increase
Solution Approach 1:
The patent adjusts the polarization orientation parameter by varying RF signal gains to achieve optimal alignment with the channel. This parameter adjustment maximizes throughput while the circuitry is configured to maintain proper orthogonality, thereby controlling cross-couplings between polarizations.
Data Source
AI summary
An apparatus, including an antenna array of antenna elements having signal feeds configured to convey a pair of radio frequency signals related to a pair of polarised beams; and circuitry coupled to the signal feeds and configured to vary a gain of the pair of radio frequency signals conveyed between the signal feeds and front end circuitry to vary an orientation of the pair of polarised beams.