Dual-Beam AESA Radar for Simultaneous Scanning and Doppler Imaging
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Solution Overview
Problem
Current radar systems face limitations in achieving simultaneous scanning and imaging, leading to potential track loss and delayed acquisition of new targets, especially in dense target environments, due to beam time sharing and constraints on platform location and orientation.
Innovation Solution
A dual beam radar system with independent waveform generators and beam formers for simultaneous scanning and imaging, utilizing timing synchronization to ensure non-interfering transmissions and receptions, allowing continuous tracking and classification of targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If beam time sharing is used in radar systems, then device complexity is reduced, but productivity deteriorates due to potential track loss and delayed acquisition of new targets
Solution Approach 1:
The radar system divides the beamforming function into multiple independent beam formers, each capable of generating and steering its own beam simultaneously. This segmentation allows multiple radar functions (search, imaging, tracking) to operate in parallel without time-sharing, resolving the contradiction by enabling full productivity while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The patent transitions from temporal multiplexing (time-sharing beams) to spatial parallelism (simultaneous beams in different directions). By adding the dimension of spatial separation for multiple beams, the system achieves full target acquisition rate while keeping device complexity acceptable through efficient use of the spatial domain.
2Productivity
If simultaneous multibeam operations are implemented, then productivity improves through continuous tracking and imaging, but device complexity increases due to multiple waveform generators and beam formers
Solution Approach 1:
Each beam former is designed as a universal module capable of performing multiple radar functions (search, imaging, tracking) simultaneously. This multi-functionality allows the system to achieve high productivity through parallel operations while controlling complexity by reusing identical modular components rather than designing specialized hardware for each function.
Solution Approach 2:
The beam formers are pre-configured with the capability to generate multiple beam patterns and steering configurations. This preliminary preparation allows the system to switch between different operational modes (search, imaging, tracking) instantly without reconfiguration delays, achieving high productivity while keeping the actual operational complexity low.
3Device complexity
If a single aperture is used for multibeam operations, then device complexity is reduced, but measurement precision deteriorates due to constraints on platform location and orientation
Solution Approach 1:
The patent applies different beamforming characteristics to different spatial regions by directing specific beams at specific angles. Each beam is optimized for its particular direction and function, allowing the single aperture to achieve high measurement precision for target classification in imaging mode while simultaneously maintaining search coverage in other directions, without requiring multiple physical apertures.
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
Enables continuous tracking and classification of targets, including maneuvering vessels, while maintaining full range search and imaging capabilities, reducing track loss and operator workload in dense target environments.
Implementation Method 1
A Radio Detecting and Ranging (RADAR) system generally consists of a transmitter used to produce an electromagnetic signal (e.g., radio waves), an antenna configured to radiate that signal
Implementation Method 2
full doppler spectrum imaging
Data Source
AI summary
A radar system accomplishes imaging and simultaneous scanning, and includes: dual waveform generators, beam formers, and phase shifters, and a shared transmit/receive module at each antenna element. The first waveform generator generates a first frequency that's constituted into a first radar beam by the first beam former then steered by the first phase shifter followed by the transmit/receive module sending a high power signal in the direction of the target being imaged. A second waveform generator generates a second frequency that's constituted into a second beam by the second beam former, steered by the second phase shifter, and transmitted by the same T/R/module, using sequential timing to provide a scanning beam of the surveillance area. On receive, the common T/R module drives the respective phase shifters, the beam formers to form the respective beams, including the beam staring at the target being imaged, and the beam performing surveillance.