Vehicle Radar Dielectric Waveguide Phase Coherence
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Solution Overview
Problem
Radar systems for vehicles face challenges in reducing costs while maintaining or improving performance parameters such as accuracy, resolution, and reliability, particularly due to the need for sophisticated and expensive electronics to operate at high frequencies above 20 GHz.
Innovation Solution
A radar system for vehicles that includes an antenna element, a dielectric waveguide, and a radar circuit configured to communicate through the waveguide, allowing for flexible connectivity of multiple antenna elements to a common radar unit, reducing the need for dedicated transceivers and enhancing spatial resolution through phase-coherent radio frequency signal generation and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated transceivers are used for each antenna element to maintain high-frequency operation above 20 GHz, then measurement precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
Multiple antenna elements share a common radar circuit instead of each having a dedicated transceiver. The patent describes a configuration where several antenna elements are connected to a single radar circuit through waveguides, allowing high-frequency operation while reducing the number of expensive transceiver components.
Solution Approach 2:
A single radar circuit serves multiple antenna elements simultaneously. The common radar circuit is designed to distribute radio frequency signals to and receive signals from multiple antenna elements, making one component perform the function of what would traditionally require multiple dedicated transceivers.
2Measurement precision
If sophisticated electronics are used to operate at high frequencies above 20 GHz, then measurement precision and resolution are improved, but cost increases
Solution Approach 1:
The patent combines multiple antenna elements with a single radar circuit, reducing the total number of expensive high-frequency electronic components needed. This sharing arrangement maintains high-frequency operation capability while lowering the overall system cost by eliminating redundant transceiver hardware.
Solution Approach 2:
Instead of copying expensive transceiver units for each antenna element, the patent uses a single copied radar circuit design that can serve multiple antennas through waveguide connections, reducing the cost of high-frequency electronics while maintaining performance.
3Measurement precision
If multiple antenna elements are connected to a common radar unit, then spatial resolution is improved through triangulation, but device complexity increases
Solution Approach 1:
Waveguides are introduced as intermediary components to connect antenna elements to the common radar circuit. These waveguides provide a structured and manageable connection method that reduces the complexity of directly connecting multiple antennas to a shared circuit, while enabling triangulation for improved spatial resolution.
4Measurement precision
If phase-coherent radio frequency signal generation is implemented across multiple antenna elements, then measurement precision is improved, but device complexity increases
Solution Approach 1:
A single common radar circuit generates phase-coherent radio frequency signals that are distributed to multiple antenna elements. This centralized signal generation approach ensures phase coherence across all antennas while avoiding the complexity of synchronizing multiple independent transceivers, maintaining measurement precision with reduced system complexity.
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 configuration reduces hardware complexity and costs, enhances sensitivity and reliability by correlating noise across multiple antenna elements, and improves accuracy through triangulation and direction-of-arrival estimation, while maintaining high-frequency operation.
Implementation Method 1
a dielectric waveguide, and a radar circuit configured to communicate with the antenna element via the dielectric waveguide
Data Source
AI summary
A radar system for a vehicle includes an antenna element installable at an outer shell of the vehicle, a dielectric waveguide, and a radar circuit configured to communicate with the antenna element via the dielectric waveguide. A vehicle includes a plurality of radar radio heads arranged at an outer shell of the vehicle, a plurality of waveguides, and a radar circuit configured to generate a common local oscillator signal and simultaneously provide respective radio frequency signal derived from the common local oscillator signal to the plurality of radar radio heads via the plurality of waveguides.