Optoelectronic Electric Field Sensor Using Optical Modulation
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Solution Overview
Problem
Existing electric field sensing technologies face interference issues due to conductive wires and metal cables, which affect the accuracy of electric wave sensing, especially for micro antennas, as they generate electric fields and distort the signals being sensed.
Innovation Solution
An optoelectronic system that employs an optically modulated scattering module to convert electric field signals into modulated scattering signals, which are then received by a low-interference optoelectronic sensing module, using optical modulation signals to minimize interference and allow precise sensing of electric field distributions without signal coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conductive wires are used to transmit control signals and bias diodes inside the scatterer, then the electric field signal can be sensed, but the wires generate electric field interference that affects sensing accuracy
Solution Approach 1:
The patent replaces the conventional electrical control system (conductive wires transmitting control signals to bias diodes) with an optical control system. Optical modulation signals are used to control the scattering properties of the scatterer, eliminating the need for conductive control wires that generate interfering electric fields. This substitution of electrical control with optical control resolves the interference problem while maintaining sensing capability.
Solution Approach 2:
The patent introduces optical modulation signals as an intermediary to control the scatterer's properties. Instead of directly using electrical signals through conductive wires, the system uses optical signals as a mediator to modulate the scattering characteristics, thereby controlling the scatterer without introducing harmful electrical interference.
2Measurement precision
If a conventional antenna is used to receive scattering signals through a metal cable, then the signal can be transmitted, but the cable distorts the scattering signal and prevents close placement of the antenna to the scatterer
Solution Approach 1:
The patent replaces the conventional electrical signal transmission system (metal cable connecting antenna to receiver) with an optical transmission system. Optical modulation signals are used to encode the scattering information, and optical fibers or wireless optical transmission is used to carry these signals, eliminating the metal cable that causes signal distortion and coupling interference.
Solution Approach 2:
The patent uses optical modulation signals as an intermediary to transmit scattering information. Instead of directly transmitting electrical signals through metal cables that cause distortion, the system modulates optical signals with the scattering information and transmits these optical signals, thereby avoiding cable-induced distortion and enabling closer placement of sensing components.
3Object-affected harmful factors
If the receiving antenna is placed closely to the scatterer to avoid signal coupling, then interference is reduced, but the conventional antenna and cable system causes signal distortion
Solution Approach 1:
The patent substitutes the conventional antenna-cable electrical transmission system with an optical modulation and transmission system. This allows the sensing module to be placed closely to the scatterer for minimal coupling interference, while the optical transmission path avoids the signal distortion problems of metal cables, achieving both close placement and signal fidelity.
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
The system effectively senses electric field distributions with reduced interference, enabling accurate measurements for near-field, SAR distribution, and electro-compatibility analysis while maintaining low costs and minimizing signal distortion.
Implementation Method 1
an optically modulated scattering module configured to convert an electric field signal into a modulated scattering signal based on an optical modulation signal
Implementation Method 2
an optoelectronic sensing module configured to receive the modulated scattering signal
Data Source
AI summary
An optoelectronic system for sensing an electric field signal includes an optically modulated scattering module configured to convert an electric field signal into a modulated scattering signal based on an optical modulation signal, an optoelectronic sensing module configured to generate an optical signal upon receiving the modulated scattering signal, an optical detector coupled to the optoelectronic sensing module, a synchronous detection circuit configured to detect the modulated scattering signal received by the optoelectronic sensing module based on an electric modulation signal and a signal processing circuit electrically connected to the synchronous detection circuit for calculating the amplitude and phase of the electric field signal under test. The present optoelectronic system for sensing an electric field signal integrates a low-interference optically modulated scattering module and a low-interference optoelectronic sensing module for sensing the distribution of the electric field under test and provides for low interference and low cost.