Quasi-surface plasmon ultra-wide band low-scattering slot antenna

Abstract

The invention discloses a quasi-surface plasmon ultra-wide band low-scattering slot antenna. Radiation apertures have circular structures in same area; the radius of a circle is r1=68mm; the thickness of a dielectric slab of an SSPP slot antenna is 1mm; a metal coats a rear feeding part covering an area of 20mm*40mm on the SSPP slot antenna; a 26mm*2mm gap is formed on a central position of the SSPP slot antenna; the rest positions are not coated with the metal; a dielectric constant of the dielectric slab is 2.65; the loss tangent is less than 0.001. The quasi-surface plasmon ultra-wide band low-scattering slot antenna is realized by the invention; the antenna has an obvious RCS (Radar Cross Section) reduction effect within 1GHz-10GHz; the maximum reduction volume of MRCS is 16.93dB or above; the relative bandwidth of the SSPP slot antenna is 9.4%; the frequency coverage is 5.25GHz-5.77GHz; compared with the traditional antenna, the SSPP antenna has the advantage that the beam width is at least widened for 65 degrees.

Description

technical field [0001] The invention belongs to the field of novel electromagnetic metamaterials and applications, in particular to an ultra-wideband low-scattering slot antenna of quasi-surface plasmons. Background technique [0002] Surface Plasmon Polaritons (SPP) is a surface electromagnetic wave mode, which usually exists on the surface of two materials with opposite dielectric constants. Because of its surface wave characteristics, electromagnetic waves (such as light waves) in certain frequency bands can be constrained to a subwavelength spatial extent. General surface plasmons mainly exist in nanostructures in the light wave band. The equivalent permittivity of an ideal conductor with a subwavelength small hole structure. When the electromagnetic wave is incident on the small hole, the attenuated waveguide mode of the small hole is excited. Only the fundamental mode that plays a leading role in supertransmission is considered. The calculation results show that: Ide...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a quasi-surface plasmon ultra-wideband low-scattering slot antenna, which aims to solve the problem that the existing quasi-surface plasmon structure in the microwave frequency band is very sensitive to the polarization of the incident wave due to the structure itself , most of them can only excite TM-polarized SSPP, and its application in the antenna is difficult to take into account the radiation and scattering characteristics of the antenna

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