Active Decoy Van Atta Array Missile Defense
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Solution Overview
Problem
Existing active missile defense systems face challenges in effectively distinguishing between decoys and real targets, especially with modern missiles that can differentiate between decoys and actual radar signals, and require time for decoys to unfold and become operational.
Innovation Solution
An active decoy system utilizing a van Atta array or retro-directive antenna that actively transmits and reflects radar signals back to incoming missiles, with directional alignment via sensors and position control systems, enabling immediate and precise decoy deployment and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive decoys are used to reflect radar signals, then the system is simple and does not require power, but the radar backscatter cross-section is insufficient and modern missiles can distinguish decoys from real targets
Solution Approach 1:
The patent applies dynamics by transitioning from static passive decoys to dynamic active decoys. The van Atta array actively transmits radar signals and dynamically adjusts its response characteristics to match the real target's radar signature, making the decoy indistinguishable from the actual target to modern radar-guided missiles.
Solution Approach 2:
The patent changes key parameters by transforming the decoy from a passive reflector to an active transmitter. The van Atta array modifies the radar backscatter cross-section parameter by actively transmitting signals with characteristics matching the protected target, thereby increasing effectiveness against modern missiles that can distinguish passive decoys.
2Object-generated harmful factors
If alternative active decoys are used, then the radar backscatter cross-section is increased, but the decoys require time to unfold and become operational after deployment
Solution Approach 1:
The patent applies preliminary action by pre-configuring the van Atta array elements in a compact storable form before deployment. Upon deployment, the array elements are already positioned and connected, eliminating the need for time-consuming unfolding and activation sequences required by alternative active decoy systems.
3Device complexity
If a single van Atta array is used, then the device complexity is reduced, but the system cannot determine the direction of incoming missile signals
Solution Approach 1:
The patent applies segmentation by dividing the single van Atta array into multiple distributed arrays. Each array element or subgroup can independently determine the direction of incoming missile signals by analyzing the phase and amplitude differences of received radar waves, providing comprehensive angular coverage without requiring a single complex centralized structure.
4Measurement precision
If multiple arrays are connected with position control systems, then the direction determination and alignment capability is improved, but the device complexity and control system requirements increase
Solution Approach 1:
The patent applies universality by designing the van Atta array elements to perform multiple functions simultaneously. Each array element serves both as a transmitter for generating radar backscatter and as a sensor for determining the direction of incoming missile signals. This multi-functionality eliminates the need for separate control systems for each function, reducing overall system complexity while maintaining high measurement precision.
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 generates a large radar backscatter cross-section, effectively distracting or seducing missiles by mimicking the real target, enhancing protection by providing a decoy target that can move independently and align with incoming missiles, improving defense against radar-guided missiles without requiring directional antenna adjustments.
Implementation Method 1
at least one retro-directive antenna or retro-reflector (2), which can be formed from at least one receiving and transmitting antenna as a reflector or reflection antenna
Implementation Method 2
to direct the radar beam RF emitted by the missile 5 precisely in the direction of incidence and thus sent back to the missile 5 as a reflection beam RS
Data Source
Figure 1~2
Figure 3
AI summary
The invention proposes the creation of a decoy target (1, 10) by means of the use of a retro-reflector or a retro-directive antenna (2, 11, 12), preferably in the form of a van-Atta array, or by means of a backscatter system, having means which are able to send a radar signal (RF) actively and accurately back in the direction of incidence and thus to the missile (5). The use of a retro-reflector (2, 11, 12) as an active decoy target has the advantage that, as an active retro-reflector (2, 11, 12), this generates a large radar backscatter frequency cross section (RCS), which permits the production of a large RCS for any desired polarization of the missile (5).