Radar Sensor Test System Using Antenna Array and Reflector
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Solution Overview
Problem
Current test systems for radar sensors are costly and require different setups for various tests, leading to inefficiencies and high expenses due to the need for distinct hardware configurations for calibration and dynamic scenario simulations.
Innovation Solution
A compact test system incorporating a test chamber with an antenna unit and antenna array, along with two radar target simulators, enabling calibration and hardware-in-the-loop testing capabilities within a single setup, supporting multiple frequency bands and dynamic scenarios, and featuring a reflector for creating a quiet zone and alignment module for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different test systems are provided for different tests and test scenarios, then testing capabilities for various scenarios are improved, but costs and device complexity increase
Solution Approach 1:
The test system is designed with multi-functional capabilities to perform both calibration tests and hardware-in-the-loop tests using a single setup. The test chamber can accommodate different antenna configurations (antenna unit for calibration, antenna array for HiL tests) and supports multiple target simulators, enabling one system to replace multiple specialized test systems.
Solution Approach 2:
The patent combines previously separate test systems into a unified platform. The calibration test system and hardware-in-the-loop test system are merged into a single test chamber with shared infrastructure, including the test location, target simulators, and control systems, thereby reducing overall complexity and cost while maintaining all required testing capabilities.
2Measurement precision
If large far-field measurement facilities are used for radar sensor calibration, then calibration accuracy is improved, but the system size and costs increase
Solution Approach 1:
The patent transitions from traditional large-scale spatial far-field measurement to a compact equivalent far-field setup using electromagnetic field transformation techniques. The test chamber creates an equivalent far-field environment through carefully positioned reflectors and antenna configurations, achieving the same calibration accuracy in a much smaller physical space.
Solution Approach 2:
Reflectors and electromagnetic field transformation elements are introduced as intermediaries to create the equivalent far-field conditions within the compact test chamber. These components mediate between the physical constraints of small space and the requirements for far-field calibration accuracy, enabling precise measurements without large facility dimensions.
3Adaptability or versatility
If multiple target solutions with fixed positions are used, then testing capabilities are improved, but adaptability for dynamic scenarios is reduced
Solution Approach 1:
The test system incorporates movable and adjustable components, including positioners for the test location and configurable target simulators that can be dynamically positioned and programmed. This allows the system to transition from fixed-position multi-target setups to dynamic scenario testing, where targets can move and change configuration based on test requirements.
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 provides a cost-effective, compact solution for diverse radar sensor testing, including calibration and multi-target scenarios, with the ability to test across different frequency bands and simulate dynamic conditions, while maintaining high precision and reducing external interference.
Implementation Method 1
the antenna unit comprises a reflector and an antenna associated with the reflector such that plane waves are provided at the test location
Implementation Method 2
the reflector may correspond to a spatial filter that extracts planar components of spherical waves from radar sensor to be tested and focuses them at a focal point
Implementation Method 3
a radar sensor to be tested is placed for testing
Data Source
AI summary
A test system for testing a radar sensor comprising a test chamber for encompassing a radar sensor to be tested. A test location is provided within the test chamber on which the radar sensor to be tested is placed for testing. Further, the test system comprises at least one antenna unit and at least one first radar target simulator connected to the antenna unit. The test system also comprises at least one antenna array different to the antenna unit and at least one second radar target simulator connected to the antenna array.