Drift Field Diode Sensor for High-Frequency Transmission Link Detection
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Solution Overview
Problem
Existing sensor systems for determining the properties of a transmission link or objects within it are slow and prone to interference due to low operating frequencies and 1/f noise, limiting their speed and accuracy.
Innovation Solution
A sensor system utilizing a feedback control loop with a drift field diode and a control loop, capable of operating at high frequencies (up to the GHz range), which reduces interference and enables faster measurements by using a drift field diode with a doping gradient to create a space charge zone and modulating sensitivity with the transmit feed signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If analog multiplication unit is used in existing sensor systems, then the system can perform measurements, but the operating frequency is limited to relatively low frequencies and the system becomes slow and prone to interference
Solution Approach 1:
The patent replaces the mechanical/electronic analog multiplication unit with an optical-based detection system using a drift field diode. The drift field diode directly converts optical signals to electrical signals at high frequencies without requiring analog multiplication, thereby eliminating the frequency limitations and interference issues associated with analog multiplication units.
Solution Approach 2:
The patent changes the operating frequency parameter from low frequencies (limited by analog multiplication) to high frequencies (GHz range). This is achieved by using a drift field diode with optimized doping gradient that can operate effectively at high frequencies, fundamentally changing the frequency regime of the measurement system.
2Productivity
If existing sensor systems operate at low frequencies, then they can function with simple components, but they are slow and suffer from 1/f noise interference
Solution Approach 1:
The patent fundamentally changes the operating frequency parameter from low to high (GHz range). This parameter change simultaneously increases measurement throughput and eliminates 1/f noise, as 1/f noise is frequency-dependent and decreases at higher frequencies. The drift field diode is specifically designed to operate effectively at these high frequencies.
3Speed
If drift field diode with doping gradient is used, then high-frequency operation is enabled, but the device structure becomes more complex
Solution Approach 1:
The patent optimizes the doping gradient parameter within the drift field diode to achieve high-frequency operation. By carefully controlling the doping gradient, the device achieves GHz-range operation while keeping the structural complexity manageable. The doping gradient is optimized to create the necessary space charge zone for high-frequency response without requiring overly complex device architecture.
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 achieves significantly faster measurements with reduced interference, allowing for high-frequency operation and improved sensitivity, making it less susceptible to noise and enabling efficient processing and demodulation of signals.
Implementation Method 1
The drift field diode has a doping gradient generated by a doping profile, so that a space charge zone is created that can be modeled by an electrostatic field
Implementation Method 2
a space charge zone is created that can be modeled by an electrostatic field
Implementation Method 3
the transmitter, which is controlled with a transmit feed signal and sends a transmit signal into the transmission path that is received by the receiver
Data Source
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AI summary
A sensor system for determining the properties of a transmission path between a transmitter (H) and a receiver (D) or for detecting an object (O) in the transmission path (I), wherein the sensor system is based on a feedback control, comprising the transmitter (H), which is driven by a transmit signal (S5) and sends a transmit signal S1 into the transmission path (I), and the receiver (D), which receives the transmit signal (S1) sent by the transmitter (H) after passing through at least a part of the transmission path (I) or after passing through at least a part of the transmission path (I) and being influenced by the object (O) in the transmission path (I), and outputs a receiver output signal (S0). A compensation unit is supplied with a compensation signal and generates a compensation signal (S31).The sensor system also includes a processing unit to generate a control signal (S4) from the receiver output signal (S0), a signal generation unit to generate the feed signal (S5) or the compensation signal (S3), and a reverse transformation unit that performs a reverse transformation on the control signal (S4) or another control signal. The control signal is a measure of the properties of the transmission path (I) and/or the object (O) within the transmission path (I). The receiver (D) is designed as a drift-field diode (DFD) in which an element of the processing unit is integrated. The drift-field diode (DFD) has a doping gradient generated by a doping profile, creating a space charge region that can be modulated by an electrostatic field.