Vehicle Radar High-Pass Filter for Low-Frequency Noise Suppression
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Solution Overview
Problem
Vehicle radars face accuracy issues due to low-frequency noise generated internally, which cannot be distinguished from external noise, leading to incorrect target detection.
Innovation Solution
The implementation of high-pass filters on signal lines connecting transmitting and receiving chips within the vehicle radar to filter out low-frequency noise, ensuring that only synchronized high-frequency signals are transmitted for target detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-pass filters are connected to signal lines to filter low-frequency noise, then target detection accuracy is improved, but device complexity increases
Solution Approach 1:
The high-pass filter is nested within the radar device structure, with the filter integrated into the signal processing path between the transmitting and receiving chips. This nesting approach allows the filter to be part of the overall device without requiring separate external components, thus improving target detection accuracy while minimizing the increase in device complexity.
2Measurement precision
If high-pass filters are added to suppress internal low-frequency noise, then target detection accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The high-pass filter is designed with specific electrical parameters (cut-off frequency, impedance values) that are optimized for the radar's operating conditions. By carefully selecting these parameters, the filter can be implemented using standard electronic components and conventional PCB design techniques, thereby improving target detection accuracy through noise suppression while maintaining ease of manufacture through parameter optimization rather than requiring complex manufacturing processes.
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 solution effectively suppresses internal low-frequency noise, enhancing the accuracy of target detection and preventing performance degradation caused by noise within the radar system.
Implementation Method 1
high-pass filters connected to the plurality of signal lines, respectively, to filter a low-frequency component from the signal transferred along the plurality of signal lines
Data Source
AI summary
A vehicle radar. In the vehicle radar, a high-pass filter is disposed on a signal line connecting a transmitting chip and a receiving chip, the signal line allowing a local oscillation signal to be transferred therethrough. The high-pass filter prevents noise from being introduced through the signal line, along which the local oscillation signal is transferred. This prevents the accuracy of detection from being lowered by low-frequency noise generated from the interior of the vehicle radar. The high-pass filter connected to the signal line is embodied as a variety of configurations, thereby providing a structure able to effectively suppress low-frequency noise while maintaining the existing structure of the vehicle radar.