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CN-122017368-A - Electromagnetic sensor stealth structure for enhancing sensitivity

CN122017368ACN 122017368 ACN122017368 ACN 122017368ACN-122017368-A

Abstract

The invention relates to the technical field of electromagnetic sensing, stealth technology and electromagnetic wave regulation and control. The existing sensor structure still has the limitations that stealth, signal enhancement and stable electric connection cannot be realized at the same time, sensitivity and stealth performance are mutually restricted, and the like. The invention discloses an electromagnetic sensor stealth structure for enhancing sensitivity, which is characterized in that a plurality of hiding areas and a high refractive index core detection area are arranged in an anisotropic medium shell layer, a sub-wavelength-sized communication hole is arranged between the hiding areas and the high refractive index core detection area, when external electromagnetic waves are incident to the electromagnetic sensor stealth structure, the electromagnetic waves can be guided to bypass a sensor main body to realize stealth, meanwhile, the electromagnetic waves are converged to the high refractive index core detection area to realize signal enhancement, and the stable electric connection effect between the sensor main body and a probe is kept.

Inventors

  • LIU YICHAO
  • SUN FEI
  • ZHAO XIAODAN

Assignees

  • 太原理工大学

Dates

Publication Date
20260512
Application Date
20260128

Claims (6)

  1. 1. The utility model provides an electromagnetic sensor stealthy structure of reinforcing sensitivity, its characterized in that, includes anisotropic medium shell layer (3), set up a plurality of hidden areas (2) and a high refractive index core detection region (1) in anisotropic medium shell layer (3), be provided with the intercommunicating pore of sub-wavelength size between hidden area (2) and the high refractive index core detection region (1), hidden area (2) distribute outside high refractive index core detection region (1), in hidden area (2) are arranged in to the sensor main part, the sensor probe runs through the junction of high refractive index core detection region (1) and hidden area (2) through the intercommunicating pore.
  2. 2. The sensitivity-enhanced electromagnetic sensor stealth structure according to claim 1, wherein a diameter of the communication hole is not more than 0.05λ 0 ,λ 0 representing a detection electromagnetic wave center wavelength.
  3. 3. Electromagnetic sensor stealth structure with enhanced sensitivity according to claim 1, characterized in that the conductive metal tip (5) of the sensor probe extends into the high refractive index core detection area (1), the coaxial cable part (4) of the sensor probe is located in the hidden area (2) and connected to the sensor body, enabling a stable electrical connection of the sensor body to the sensor probe.
  4. 4. A sensitivity enhanced electromagnetic sensor stealth structure according to claim 3, characterized in that the diameter w t of the conductive metal tip (5) of the sensor probe is smaller than the diameter w p of the coaxial cable portion (4) of the sensor probe, the length of the conductive metal tip (5) extending into the high refractive index core detection area (1) is l t , and l t =0.05λ 0 ,λ 0 represents the detection electromagnetic wave center wavelength.
  5. 5. Electromagnetic sensor stealth structure with enhanced sensitivity according to claim 1, characterized in that the refractive index of the high refractive index core detection area (1) is L2/L1, wherein L2 is the outer boundary perimeter of the anisotropic media shell layer (3) and L1 is the boundary perimeter of the high refractive index core detection area (1).
  6. 6. Electromagnetic sensor stealth structure with enhanced sensitivity according to claim 1, characterized in that the permittivity and permeability of the anisotropic dielectric shell layer (3) approach infinity in the main axis direction and equal zero in the other two perpendicular directions.

Description

Electromagnetic sensor stealth structure for enhancing sensitivity Technical Field The invention relates to the technical fields of electromagnetic sensing, stealth technology and electromagnetic wave regulation and control, in particular to an electromagnetic sensor stealth structure for enhancing sensitivity. Background The detection of extremely weak electromagnetic signals has key significance in a plurality of fields such as brain signal detection, single-molecule imaging, quantum sensing, celestial body physical detection, biomedical detection and the like. However, the conventional sensor faces two major core challenges in the weak signal detection process, namely that the strength of the weak electromagnetic signal is extremely low, the conventional sensor is difficult to capture effectively, and the physical existence of the sensor can inevitably disturb surrounding electromagnetic field distribution, so that the detection signal is distorted, the sensor is easy to detect, and the special requirements of invisible monitoring and the like cannot be met. In the prior art, the sensitivity improvement and the sensor stealth are usually realized through independent structural designs, and a unified scheme capable of achieving the two targets at the same time is lacking. For example, the sensitivity of the sensor can be improved by a complementary split ring resonator, a folding structure and the like, but the problems of disturbance of the sensor to an electromagnetic field and self stealth cannot be solved, while stealth technologies such as a plasma shell, a super-surface stealth garment and the like can reduce the scattering of the sensor, but cannot enhance the signal detection sensitivity, and it is difficult to simultaneously eliminate the direct scattering of a sensor main body (with larger electric size) and the indirect scattering of a detection probe (with sub-wavelength scale), and at the same time, the electric connection between the sensor main body and the probe can be damaged. At present, a structure capable of realizing stealth of a sensor, reducing disturbance of an electromagnetic field and remarkably improving detection sensitivity on the premise of ensuring stable electric connection between a sensor main body and a probe is still lacking. Disclosure of Invention Aiming at the defects in the prior art, the invention provides an electromagnetic sensor stealth structure for enhancing sensitivity, which is suitable for the scenes of ultra-weak signal detection, stealth monitoring, biosensing, radar detection, intelligent control, information safety systems and the like by adopting a multifunctional core-shell structure design, enhancing the electromagnetic signal intensity of a detection area while realizing sensor stealth (namely scattering inhibition), keeping the electrical connectivity of a sensor main body and a probe, and having stealth function and sensitivity enhancing characteristics. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides an electromagnetic sensor stealthy structure of reinforcing sensitivity, includes the anisotropic medium shell layer, sets up a plurality of hidden areas and a high refractive index core detection area in the anisotropic medium shell layer, is provided with the intercommunicating pore of sub-wavelength size between hidden area and the high refractive index core detection area, and hidden area distributes outside the high refractive index core detection area, and the sensor main part is arranged in hidden area, and the sensor probe runs through the junction of high refractive index core detection area and hidden area through the intercommunicating pore. Further, a diameter of the communication hole of not more than 0.05λ 0,λ0 indicates that the center wavelength of the electromagnetic wave is detected. Further, the conductive metal tip of the sensor probe extends into the high refractive index core detection area, and the coaxial cable part of the sensor probe is positioned in the hidden area and connected with the sensor main body, so that stable electric connection between the sensor main body and the sensor probe is realized. Further, the diameter w t of the conductive metal tip of the sensor probe is smaller than the diameter w p of the coaxial cable portion of the sensor probe, the length of the conductive metal tip extending into the high refractive index core detection region is l t, and l t=0.05λ0,λ0 represents the detection electromagnetic wave center wavelength. Further, the refractive index of the high refractive index core detection region is L2/L1, wherein L2 is the outer boundary perimeter of the anisotropic medium shell layer, and L1 is the boundary perimeter of the high refractive index core detection region. Further, the dielectric constant and permeability of the anisotropic dielectric shell layer approach infinity in the principal axis direction and