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KR-20260067807-A - SATELLITE AND AIRBORNE SAR JAMMER SYSTEM

KR20260067807AKR 20260067807 AKR20260067807 AKR 20260067807AKR-20260067807-A

Abstract

The present invention comprises a jammer having a transmitting antenna and a receiving antenna; and a cover covering the upper side of the jammer.

Inventors

  • 권순구
  • 조현범

Assignees

  • 엘아이지디펜스앤에어로스페이스 주식회사

Dates

Publication Date
20260513
Application Date
20241106

Claims (6)

  1. A jammer equipped with a transmitting antenna and a receiving antenna; A cover covering the upper side of the above jammer; A satellite and airborne SAR countermeasure jammer system characterized by being composed including
  2. In claim 1, The above cover is composed of an absorber having a backscattering coefficient equal to the backscattering coefficient around the jammer. Satellite and aerial SAR countermeasure jammer system featuring
  3. In claim 1, The above cover is set such that the amount of power attenuation due to the passage of radio waves is at a level where radio waves transmitted from the SAR can be received by the jammer, while radio waves transmitted from the SAR and reflected from the jammer are at a level where it is difficult to receive them by the SAR. Satellite and aerial SAR countermeasure jammer system featuring
  4. In claim 1, The thickness of the above cover is set such that the amount of power attenuation due to the passage of radio waves is at a level where radio waves transmitted from the SAR can be received by the jammer, while radio waves transmitted from the SAR and reflected from the jammer are at a level where it is difficult to receive them by the SAR. Satellite and aerial SAR countermeasure jammer system featuring
  5. In claim 1, The above cover has the same roughness as the roughness around the jammer. Satellite and aerial SAR countermeasure jammer system featuring
  6. In claim 1, The above cover has the same dielectric constant as the area around the jammer. Satellite and aerial SAR countermeasure jammer system featuring

Description

Satellite and Airborne SAR Countermeasure Jammer System The present invention relates to a jammer system. Synthetic Aperture Radar (SAR), also known as synthetic aperture radar, is a radar used to acquire high-resolution surface images. Primarily mounted on aircraft or satellites, it is used to detect terrain, features, or sea conditions over wide areas with high resolution. SAR plays an important role in reconnaissance, mapping, disaster monitoring, and terrain analysis, particularly due to its advantage of being able to acquire images regardless of weather conditions or time of day. A SAR countermeasure jammer is equipment designed to interfere with or neutralize signals detected by SAR; the jammer disrupts or distorts radar signals to prevent the SAR from generating accurate images of the target area. These jammers are primarily used for military purposes and can disrupt reconnaissance and surveillance activities and impair the enemy's intelligence gathering capabilities. The matters described above as background technology are intended only to enhance understanding of the background of the present invention and do not constitute prior art already known to those skilled in the art. FIG. 1 is a conceptual diagram illustrating a satellite and airborne SAR countermeasure jammer system according to the present invention. Figure 2 is a diagram explaining the general jamming principle of SAR, FIG. 3 is a diagram explaining the SAR jamming principle according to the present invention. FIG. 4 is a diagram explaining the principle of detecting ground jammers in conventional SAR, FIG. 5 is a diagram explaining the principle of preventing detection of a jammer according to the present invention. Figure 6 is a graph plotting the backscattering coefficient of the ground surface as a function of the angle of incidence. FIG. 7 is a diagram showing the calculation results of the backscattering coefficient of vertical polarization as a function of the angle of incidence when the surface consists of two layers. FIG. 8 is a diagram showing the calculation results of the backscattering coefficient of horizontal polarization as a function of the angle of incidence when the surface consists of two layers. FIG. 9 is a diagram showing the vertical polarization backscattering coefficient as a function of the angle of incidence when a ground jammer and an absorber cover are present on the ground surface. FIG. 10 is a diagram showing the horizontal polarization backscattering coefficient as a function of the angle of incidence when a ground jammer and an absorber cover are present on the ground surface. FIG. 11 is a diagram comparing the surrounding backscattering coefficient values with the vertical polarization backscattering coefficient values of a jammer with an absorber cover applied. Figure 12 is a diagram comparing the surrounding backscattering coefficient value with the horizontal polarization backscattering coefficient value of a jammer with an absorber cover applied. In describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Any number of components or various components in any configuration among the configurations described herein may be included within the invention described herein. Components may include any combination of the features described herein and may be arranged in any configuration among the various configurations described herein. Concepts regarding the structure and arrangement of the components of the invention, as well as their use and operation, may be applied to any number of embodiments of any combination, as well as to specific embodiments discussed herein. Embodiments including those having various featu