An Optimization Method for Frequency-Hopping Radar Spoofing and Jamming Based on a Four-Dimensional Antenna Array

By constructing a broadband time-varying array radiation pattern and hierarchically optimizing the cost function, the RF switching timing parameters of the four-dimensional antenna array are optimized, solving the beam squint and aperture crossing effects under frequency-agile radar. This achieves stable stealth of real targets and enhancement of false targets, ensuring the frequency invariance of the jamming effect and the real-time performance of the system.

CN121878621BActive Publication Date: 2026-05-26CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Filing Date
2026-03-23
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing four-dimensional antenna arrays suffer from beam squint effect, unstable false targets, and limitations in target optimization when facing frequency-agile radars with rapidly changing frequencies, resulting in unstable jamming effects and stealth failure.

Method used

A broadband frequency hopping optimization strategy based on a four-dimensional antenna array is adopted. By constructing a broadband time-varying array pattern function and a hierarchical optimization cost function, the timing parameters of the RF switch are optimized using a differential evolution algorithm to ensure that the echo of the real target is suppressed in the entire frequency band, the gain of the false target is maximized, and a robust timing control signal is generated.

Benefits of technology

It achieves stable stealth of real targets and enhancement of decoy targets in environments with rapid radar frequency changes, overcomes the aperture crossing effect, ensures the frequency invariance of the jamming effect and the real-time performance of the system, and improves the response speed and battlefield adaptability of the electronic warfare system.

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Abstract

This invention discloses an optimized method for deception jamming of frequency-hopping radar based on a four-dimensional antenna array. This method addresses the problem of existing four-dimensional antenna arrays failing to jam against broadband radars with rapidly changing frequencies due to beam squint effects. It constructs a broadband array pattern model with the entire radar frequency hopping point set as variables and establishes a hierarchical optimization cost function. This function prioritizes suppressing the echo from the true target direction to below a safe threshold across the entire frequency band, and then maximizes the minimum gain in the direction of the false target. A differential evolution algorithm is used to globally optimize the RF switching timing parameters of each array element, obtaining a set of frequency-independent robust optimal timing sequences. Loading these timing sequences into the controller enables the four-dimensional antenna array to stably achieve deception jamming effects that conceal the true target and enhance the false target across the entire frequency hopping bandwidth of the radar without real-time adjustments. This effectively overcomes the aperture crossing effect and ensures the robustness of jamming when the enemy radar frequency changes.
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Citation Information

Patent Citations

  • CN109725296A

  • CN110161453A