Quarter-mode substrate integrated waveguide frequency selective surface with high parasitic passband suppression

Abstract

The invention belongs to the technical field of frequency selective surfaces, provides a quarter-mode substrate integrated waveguide frequency selective surface with high parasitic passband suppression, and aims at solving the problem of low parasitic passband suppression degree of the frequency selective surface structure provided by the prior art under the premise of ensuring high selectivity of the substrate integrated waveguide frequency selective surface. The substrate integrated waveguide frequency selective surface comprises a first metal copper-clad layer, a dielectric layer and a second metal copper-clad layer, which are sequentially stacked from top to bottom, wherein L-shaped gaps with the same sizes are etched on the first metal copper-clad layer and the second metal copper-clad layer along the edges; each L-shaped gap comprises a shot side and a long side; the short side of the L-shaped gap in the first metal copper-clad layer is formed correspondingly to the long side of the L-shaped gap in the second metal copper-clad layer; and the corresponding long side is formed correspondingly to the short side. According to the quarter-mode substrate integrated waveguide frequency selective surface with high parasitic passband suppression, the parasitic passband suppression degree of the frequency selective surface structure is effectively improved under the premise of ensuring high selectivity of the substrate integrated waveguide frequency selective surface.

Description

technical field [0001] The invention belongs to the technical field of frequency selective surfaces, in particular to a high parasitic passband suppression substrate integrated waveguide frequency selective surface. Background technique [0002] The frequency selective surface is a kind of spatial filter, which is a periodic array structure composed of metal patches or slits. Based on different unit forms, frequency selective surfaces are widely used in microwave, millimeter wave, and terahertz frequency bands, such as sub-reflectors and radomes used as reflector antennas. Compared with traditional microstrip and metal waveguides, substrate-integrated waveguides have low-profile and low-loss characteristics; frequency-selective surfaces based on substrate-integrated waveguide technology have the advantages of high selectivity, easy bandwidth control, and easy processing. [0003] For example, in the document "Polarization rotating frequency selective surface based on substr...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a high parasitic passband suppression quarter-mode substrate integrated waveguide frequency selective surface, under the premise of ensuring high selectivity of the substrate integrated waveguide frequency selective surface, to solve the existing technology to provide frequency selective surface structure The problem of low parasitic passband suppression

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