Multi-Beam FMCW Radar for Short-Range Point Defense
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Solution Overview
Problem
Current radar systems, particularly those for short-range point defense, face challenges in efficiently tracking multiple moving targets in a high-density threat environment with limited range resolution and computational efficiency, especially when using pulsed radar technology.
Innovation Solution
The development of a multi-beam FMCW radar system that uses frequency-modulated continuous wave signals to achieve high-resolution tracking and simultaneous detection of multiple targets across a hemisphere, employing digital beamforming to form multiple receive beams and process Doppler shifts for accurate range, velocity, and angle determination, while maintaining a low computational load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulsed radar technology is used for short-range point defense, then the system can detect targets, but the range resolution is limited and computational load is high
Solution Approach 1:
The patent changes the fundamental operating parameters from pulsed radar to FMCW (Frequency-Modulated Continuous Wave) radar. This parameter change enables continuous wave transmission with frequency modulation, achieving high range resolution through frequency differentiation rather than pulse timing, thereby reducing computational complexity while improving measurement precision.
Solution Approach 2:
The patent replaces the mechanical pulse-based radar system with an electronic FMCW system that uses continuous frequency modulation. This substitution eliminates the need for complex pulse timing and processing mechanisms, reducing computational load while maintaining or improving range resolution through electronic frequency analysis.
2Productivity
If multi-beam FMCW radar system is implemented, then multiple targets can be detected simultaneously with high resolution, but the system complexity increases
Solution Approach 1:
The patent divides the radar system into multiple independent beam channels, each capable of detecting targets in different spatial directions simultaneously. This segmentation allows parallel processing of multiple targets without increasing the complexity of individual beam processing, thereby improving productivity while managing system complexity through modular architecture.
Solution Approach 2:
The patent introduces digital beamforming that operates in multiple dimensions (azimuth and elevation) simultaneously. By transforming the single-beam sequential detection approach into a multi-beam parallel detection approach across spatial dimensions, the system achieves high target detection capability without proportionally increasing computational complexity through efficient multidimensional signal processing.
3Area of stationary object
If the antenna rotates through 360 degrees to detect targets, then the entire area can be covered, but the tracking speed and response time are reduced
Solution Approach 1:
The patent implements preliminary beamforming where multiple beams are pre-configured in different directions before target detection. This allows the system to simultaneously cover the entire field of regard with multiple pre-positioned beams, eliminating the need for sequential rotation and thereby maintaining full area coverage while improving tracking speed through parallel multi-directional detection.
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 continuous tracking and identification of targets with improved accuracy and reduced power consumption, supporting more channels and higher resolution than traditional pulsed radar systems, making it suitable for point defense applications.
Implementation Method 1
Radar devices, such as real beam radars, laser radars, sonar, and the like, transmit signals, such as electromagnetic or sonar signals, that advantageously reflect off targets and are received by the radar device to provide data related to the position of the target
Implementation Method 2
The movement of the target in a radial direction, relative to the radar device, causes the radar signals that reflect off the moving target to return to the radar device with a frequency that is different than the frequency that was transmitted by the radar device. Specifically, the radial movement of the target changes the frequency of the radar signal an amount that is proportional to the relative velocity of the target
Data Source
AI summary
A multi-beam frequency-modulated continuous wave (FMCW) radar system designed for short range (<20 km) operation in a high-density threat environment against highly maneuverable threats. The multi-beam FMCW system is capable of providing continuous updates, both search and track, for an entire hemisphere against short-range targets. The multi-beam aspect is used to cover the entire field of regard, whereas the FMCW aspect is used to achieve resolution at a significantly reduced computational effort.