Controlled-Radiation Antenna Array With Near-Field Feedback

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Solution Overview

Problem

Existing reconfigurable antenna arrays are not adapted for real-time adjustment of radiation patterns, especially in environments with close environmental interferences, and require indirect measurement solutions which are unsuitable for miniaturized antennas.

Innovation Solution

An antenna system comprising a transmitting or receiving antenna element, an array of parasitic antenna elements with reconfigurable loads, near-field antennas for direct radiation measurement, and a circuit to adjust impedance values based on reference data for real-time configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the antenna is miniaturized to reduce device size, then the physical dimensions are improved, but the antenna becomes more sensitive to environmental interferences and measurement precision deteriorates

Engineering Contradiction:

Improveantenna physical sizeVSAvoidenvironmental interference sensitivity

Core Design Contradiction:

Length of moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where near-field antennas continuously measure the actual radiation pattern of the miniaturized antenna array, and the control circuit adjusts the amplitude and phase weighting coefficients based on these measurements to compensate for environmental interferences in real-time

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces indirect impedance measurement methods with direct near-field radiation measurement, substituting a mechanical/electrical measurement approach with an electromagnetic field-based measurement approach that is more suitable for miniaturized antennas

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If indirect impedance measurement is used for antenna calibration, then device complexity is reduced, but measurement precision becomes insufficient for miniaturized antennas

Engineering Contradiction:

Improvemeasurement system complexityVSAvoidradiation pattern measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces near-field antennas as intermediary measurement devices that directly sample the electromagnetic radiation field in the near-field region, providing accurate measurement data for calibration without requiring complex far-field measurement setups

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If a dedicated transmitting antenna is used for calibration phases, then measurement precision is improved, but device complexity and loss of time increase

Engineering Contradiction:

Improvecalibration measurement accuracyVSAvoidantenna system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent makes the antenna array elements multi-functional by using them both for normal communication operations and for self-calibration measurements, eliminating the need for dedicated calibration antennas while maintaining measurement precision

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The antenna system performs self-calibration by using its own radiated signals as the measurement source, with near-field antennas measuring the radiation pattern during normal operation without requiring external calibration equipment or dedicated transmitting elements

Inventive Principle:

Principle #25Self-service

4Adaptability or versatility

If real-time adjustment of radiation pattern is implemented, then adaptability to environmental changes is improved, but device complexity and use of energy increase

Engineering Contradiction:

Improvereal-time environment adaptationVSAvoidcontrol system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements continuous real-time calibration where near-field antennas continuously measure the radiation pattern and the control circuit continuously adjusts weighting coefficients, maintaining optimal performance without interruption to normal antenna operations

Inventive Principle:

Principle #20Continuity of useful 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

Enables real-time adjustment of radiation patterns, effectively compensating for environmental interferences and improving the accuracy of antenna settings, even in miniaturized forms.

Implementation Method 1

one or a plurality of near-field antennas; and a circuit for setting the configuration of the array of parasitic antenna elements according to a radiation picked up by the antenna(s) in near field

Methodology Applied

Scientific EffectNear-field electromagnetic radiation detection: Electromagnetic Induction

Data Source

PatentUS12315997B2Controlled-radiation antenna system

Publication Date: 2025.05.27 COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

AI summary

The present description concerns an antenna system comprising a transmitting or receiving antenna element (12), an array of parasitic antenna elements (14), individually associated with reconfigurable loads (15), one or a plurality of near-field antennas (32), and a circuit (18, 34) for setting the configuration of the array of parasitic antenna elements according to a radiation picked up by the near-field antenna(s) during a radio frequency transmission by the transmitting or receiving antenna element.