Frequency-controlled array-based RF stealth method and device

Abstract

The present invention discloses a frequency-controlled array-based RF stealth method, which comprises the steps of sending a carrier signal sequence to a target object, wherein each carrier signal in the carrier signal sequence contains a low gain and a specified frequency difference exists between every two adjacent carrier signals; receiving an echo signal sequence from the target object; and synthesizing a high-gain antenna directional pattern antenna through the beam forming process of the echo signal sequence. The invention also discloses a frequency-controlled array-based RF stealth device. According to the technical scheme of the frequency-controlled array-based RF stealth method and the device, a conventional high-gain antenna directional pattern that covers a to-be-monitored region is replaced by a series of low-gain antenna directional patterns. Since the low-gain antenna directional patterns are low in peak power, the visibility of a radar can be lowered on the premise that the monitoring performance of the radar is kept the same. That is, the low probability of intercept (LPI) performance is improved to be better.

Description

technical field [0001] The invention relates to the technical field of electronic countermeasures, and in particular designs a radio frequency stealth method and equipment based on a frequency control array. Background technique [0002] With the development of modern military science and technology, electronic jamming and anti-jamming related to radar has become one of the focuses of future battlefield competition. In view of the increasingly complex situation of radar application environment, the radar's radio frequency stealth ability has a greater impact. immediate requirement. Under the premise of ensuring the detection capability of the radar, it is necessary to reduce the visibility of the radar and enhance its LPI (Low Probability of Interception) capability to gain the initiative. This is of great significance for improving the radar's anti-reconnaissance capability and self-survivability. [0003] Currently commonly used techniques can be divided into three areas:...

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Problems solved by technology

[0004] in addition, a method of antenna frequency hopping employs irregular scan patterns to reduce receiver susceptibility to radar

Although the probability of being detected in the side lobe region can be reduced by specific beamforming techniques, the high-gain main lobe can still be easily detected

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