Radar Apparatus Using Cross-Polarized Complex Array Antenna
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radar apparatuses for vehicles face challenges in reducing size while maintaining performance due to the need for multiple channels and hardware space constraints, particularly when using antennas with the same polarization characteristics for long-range and short-range detection.
Innovation Solution
Implementing a radar apparatus with a complex array antenna that receives and processes signals with different polarization characteristics using one reception antenna, allowing for reduced hardware size without compromising performance by configuring long-range and short-range transmission signals to have cross polarization characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple reception antennas with the same polarization characteristics are used for long-range and short-range detection, then the radar performance is ensured, but the hardware size increases and antenna interference occurs
Solution Approach 1:
The patent combines long-range and short-range reception functions into a single reception antenna by utilizing different polarization characteristics for transmission signals. The complex array antenna receives both long-range and short-range reflected signals simultaneously, eliminating the need for separate reception antennas and reducing hardware size while maintaining detection performance.
Solution Approach 2:
The patent applies different polarization characteristics to different transmission signals (first polarized for long-range, second polarized for short-range). This local differentiation in polarization quality allows the single reception antenna to distinguish between long-range and short-range signals, ensuring reliable performance without requiring multiple antennas.
2Reliability
If multiple reception chips are used to maintain the number of channels, then the radar performance is ensured, but the hardware size and complexity increase
Solution Approach 1:
The single complex array antenna performs multiple functions by receiving both long-range and short-range signals simultaneously through polarization differentiation. This multi-functionality eliminates the need for multiple specialized reception chips, reducing device complexity while maintaining the required number of detection channels.
Solution Approach 2:
The patent changes the polarization parameter of transmission signals to enable a single reception antenna to handle multiple detection channels. By transmitting signals with different polarization characteristics and receiving them with a single antenna, the system maintains channel diversity without increasing the number of reception chips.
3Volume of moving object
If antennas are placed in proximity to reduce radar size, then the hardware size is reduced, but antenna output interference occurs
Solution Approach 1:
The patent applies different polarization characteristics to long-range and short-range transmission signals. This local quality differentiation in polarization allows the closely spaced antennas to operate without significant interference, as the polarization differences enable signal discrimination even in proximity.
Solution Approach 2:
The patent converts the potential harmful effect of proximity into a benefit by using polarization differentiation. The close spacing of antennas would normally cause interference, but by utilizing different polarization characteristics, the system actually benefits from the compact configuration while minimizing interference through polarization-based signal separation.
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 approach enables the maintenance of the same number of channels while reducing the number of reception chips and hardware size, minimizing signal interference and ensuring effective target detection for both long-range and short-range targets.
Implementation Method 1
a complex array antenna unit which includes one or more complex array antennae receiving a first polarized reception signal and a second polarized reception signal which are received by reflecting the first polarized transmission signal and the second polarized transmission signal from a target
Implementation Method 2
received by reflecting the first polarized transmission signal and the second polarized transmission signal from a target
Data Source
AI summary
The present disclosure relates to a radar apparatus and a method for processing a signal using a radar apparatus, and more particularly, to an apparatus and a method for receiving and processing reception signals having different polarization characteristics using one array antenna. Specifically, the present disclosure provides a radar apparatus including: a long-range transmission antenna unit including one or more long-range transmission array antennae which transmit a first polarized transmission signal; a short-range transmission antenna unit including one or more short-range transmission array antennae which transmit a second polarized transmission signal; a complex array antenna unit which includes one or more complex array antennae receiving a first polarized reception signal and a second polarized reception signal which are received by reflecting the first polarized transmission signal and the second polarized transmission signal from a target; and a signal processing unit which detects the target using the first polarized reception signal and the second polarized reception signal, in which the first polarized reception signal has a cross polarization characteristic with respect to the second polarized reception signal, and a radar signal processing method.