Holographic Metasurface Antenna Self-Diagnosis via Sequential Element Biasing

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Solution Overview

Problem

Existing holographic metasurface antennas (HMAs) face challenges in detecting abnormal behavior of individual tuning elements due to environmental changes and mechanical damage, making it difficult to assess the performance of each element remotely without additional hardware.

Innovation Solution

A method involving an RF source that provides a radio frequency signal to each tuning element, with a bias signal sequentially turning elements on and off, allowing for measurement of their characteristics and comparison to threshold values, enabling remote detection of abnormal behavior without additional hardware.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If additional hardware is deployed to physically test individual scattering elements, then measurement precision is improved, but device complexity and cost increase

Engineering Contradiction:

Improveindividual scattering element behavior detectionVSAvoidadditional hardware requirements

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The HMA performs self-diagnosis by using its own scattering elements to generate and measure RF signals. The system turns scattering elements on and off sequentially, measuring their individual characteristics without requiring external test equipment, thus achieving self-service testing

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces a signal processing intermediary that correlates measured RF characteristics with expected behavior patterns. This intermediary layer enables indirect detection of scattering element health through statistical analysis rather than direct physical measurement

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If remote evaluation without additional hardware is used, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvehardware requirementsVSAvoidindividual scattering element behavior detection

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent segments the overall RF signal into individual scattering element contributions by sequentially activating each element and measuring its unique characteristic signature. This segmentation enables precise individual element evaluation through the composite remote measurement

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the operational state parameter of scattering elements (on/off states) sequentially and measures the corresponding changes in RF characteristics. By analyzing these parameter changes, the system can identify individual element behavior remotely with sufficient precision

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If overall RF characteristics are measured, then ease of operation is improved, but measurement precision for individual elements deteriorates

Engineering Contradiction:

Improvemeasurement simplicityVSAvoidindividual scattering element characteristic detection

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent employs periodic action by sequentially turning scattering elements on and off in a systematic sequence. This periodic activation pattern allows the simple overall measurement system to extract individual element information through time-division multiplexing of the measurement process

Inventive Principle:

Principle #19Periodic action

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 allows for the remote evaluation of individual scattering elements' performance, identifying defective elements and providing a health report, thus maintaining antenna efficiency and reducing maintenance costs.

Implementation Method 1

A surface scattering antenna includes a plurality of scattering elements arranged in a two-dimensional array and a hologram function that defines adjustments to the scattering elements to produce an object wave that radiates from the surface scattering antenna

Methodology Applied

Scientific EffectElectromagnetic radiation scattering: Scattering

Implementation Method 2

A bias signal is employed to sequentially bias off and on each scattering element while each scattering element is individually emitting an RF signal

Methodology Applied

Scientific EffectElectrical modulation:

Data Source

PatentUS10524154B2Employing correlation measurements to remotely evaluate beam forming antennas

Publication Date: 2019.12.31 PIVOTAL COMMWARE INC

AI summary

A system for evaluating the performance of beam forming antennas based on correlations of signal to noise measurements of individual scattering elements in the antennas. A signal source provides a signal having a first frequency to an input of the antenna. Each of the antenna's scattering elements are individually selectable to radiate the signal. A control signal sequentially turns off and on each scattering element while radiating the signal. Also, a characteristic of the signal radiated by each scattering element is separately measured and each difference between the characteristics are identified and compared to one or more threshold values. A report regarding the differences that exceed the threshold value is provided to a user.