Synchronous Side Lobe Jamming Signal Timing
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Solution Overview
Problem
Conventional side lobe jamming techniques require high power and are ineffective due to differences in arrival times between main and side lobe reflected signals, exposing the jamming system and failing to deceive tracking radars.
Innovation Solution
A synchronous side lobe jamming method that analyzes the pulse repetition interval (PRI) of received radar signals to determine the number and timing of jamming signals, generating a synchronous side lobe jamming signal with calculated generation angles and distances, and transmitting it at a predetermined delay to overcome arrival time differences without exposing the jamming system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional side lobe jamming is performed with high power to overcome arrival time differences, then jamming effectiveness is improved, but power consumption increases and the jamming system becomes exposed
Solution Approach 1:
The jamming signal is transmitted in advance before the radar receives the reflected signal from the target. By calculating the time difference based on the distance difference between main lobe and side lobe paths, the jamming signal arrives at the radar at the same time as the reflected signal, creating deception without requiring high power continuous transmission
Solution Approach 2:
The system dynamically adjusts the timing of jamming signal transmission based on real-time calculation of distance differences between main lobe and side lobe paths. This dynamic timing adjustment ensures the jamming signal arrives synchronously with the reflected signal, maintaining effectiveness while optimizing power usage
2Reliability
If conventional side lobe jamming is performed, then jamming signal is transmitted, but arrival time differences between main and side lobe reflected signals cause the jamming to be ineffective for tracking radars
Solution Approach 1:
The system calculates the arrival time difference in advance based on the geometric relationship between radar, target, and jammer positions. The jamming signal is then transmitted at a precisely calculated time to compensate for the path difference, ensuring synchronous arrival at the radar with the reflected signal
Solution Approach 2:
The system changes the transmission timing parameter of the jamming signal based on the calculated time difference. By adjusting this temporal parameter, the jamming signal arrives at the radar simultaneously with the reflected signal, eliminating the arrival time difference that renders conventional jamming ineffective
3Reliability
If main lobe jamming is performed to deceive tracking radar, then tracking function is incapacitated, but search radar continues to rotate beam and receives more side lobe signals achieving little jamming effect
Solution Approach 1:
The jamming system is designed to effectively jam both search radar and tracking radar simultaneously. By transmitting the jamming signal from a position that creates path differences for both main lobe and side lobe, the system achieves universal effectiveness against different radar types without requiring separate jamming mechanisms
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 method enables effective side lobe jamming with reduced power consumption, overcoming radar arrival time differences and protecting allies by effectively jamming both tracking and search radars, even when more side lobe signals are received than main lobe signals.
Implementation Method 1
A radar transmits an electromagnetic wave to track a target object and receives an electromagnetic wave reflected from the target
Data Source
AI summary
A synchronous side lobe jamming method for an electronic attack is disclosed. The method includes receiving a radar signal from an external radar; determining the number of synchronous jamming signals based on pulse repetition interval (PRI) characteristic of the received radar signal; generating a synchronous side lobe jamming signal by calculating a generation angle and a generation distance of each of the synchronous jamming signals; and transmitting the generated synchronous side lobe jamming signal to the radar at a predetermined delay time after a jammer receives a side lobe signal.