Stokes Vector Polarization Correction for 100+ GHz Wireless Links

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Solution Overview

Problem

Existing electronic devices face limitations in supporting high data rates for wireless communications due to frequency constraints and misalignment impairments between the device and external equipment, particularly in scenarios involving multiple electromagnetic polarizations.

Innovation Solution

The implementation of a wireless communication system with a central optical processor and photodiodes that convert wireless signals to optical signals, utilizing a Stokes vector receiver to generate a rotation matrix for mitigating polarization rotations and other transmission impairments, allowing for efficient transmission and reception of wireless signals at frequencies greater than or equal to 100 GHz.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If wireless communications are performed at higher frequencies to support higher data rates, then data rate capability is improved, but transmission impairments such as polarization rotation and misalignment become more severe

Engineering Contradiction:

Improvedata rateVSAvoidcommunication efficiency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary calibration by transmitting training data through multiple polarizations before actual communication. The receiving device measures polarization rotations and misalignments in advance, storing correction information for subsequent use. This preliminary measurement and storage of polarization characteristics enables the system to compensate for impairments during actual high-frequency data transmission, resolving the contradiction between achieving high data rates and maintaining communication reliability.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If multiple electromagnetic polarizations are used for signal transmission, then channel capacity is improved, but misalignment between device and external equipment causes impairment

Engineering Contradiction:

Improvechannel capacityVSAvoidpolarization alignment

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The system implements feedback by having the receiving device measure polarization rotations and misalignments for each polarization channel, then communicate correction information back to the transmitting device. The transmitting device uses this feedback to adjust its polarization settings, ensuring optimal alignment. This closed-loop feedback mechanism enables precise polarization alignment while maintaining multiple polarization channels for high capacity transmission.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Before actual data transmission, the system performs preliminary calibration by sending training data through multiple polarizations. The receiving device measures and characterizes the polarization state of each channel in advance, storing correction information for subsequent use. This preliminary measurement establishes the polarization characteristics of each channel, enabling accurate alignment during high-capacity multi-polarization communication.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If traditional wireless communication systems are used at high frequencies, then implementation is simpler, but resource consumption and space requirements increase

Engineering Contradiction:

Improvesystem implementationVSAvoidresource consumption

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The system replaces traditional high-frequency electronic signal processing with optical signal processing. By converting wireless signals to optical signals for processing and then back to wireless signals, the system achieves more efficient resource utilization and reduced power consumption at high frequencies. This optical substitution enables simpler implementation while reducing the resource consumption that would otherwise increase with traditional high-frequency electronic systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 enables high-frequency wireless communications with improved efficiency by minimizing resource consumption and space requirements, effectively addressing polarization-related impairments and enhancing data transfer capabilities.

Implementation Method 1

a first photodiode coupled to the first antenna radiating element and configured to convert the first wireless signal into a first optical signal

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS12592781B2Electronic devices with high frequency polarization optimization

Publication Date: 2026.03.31 APPLE INC

AI summary

A first device may generate optical signals of different polarizations. Photodiodes may use the optical signals to transmit wireless signals at different polarizations and at a frequency greater than 100 GHz using the optical signals. A second device may receive the wireless signals and may convert the wireless signals into optical signals. A Stokes vector receiver on the second device may generate Stokes vectors based on the optical signals. Control circuitry on the second device may use the Stokes vectors generated for a series of training data in the wireless signals to generate a rotation matrix that characterizes polarization rotation between the first and second devices. The control circuitry may multiply wireless data in subsequently received wireless signals by the rotation matrix to mitigate the polarization rotation and other transmission impairments while using minimal resources.