A Broadband Composite Coupled Frequency Selective Surface Structure and Its Unit Structure
A frequency-selective surface and coupling-type technology, applied in the field of electromagnetic field and microwave, can solve problems such as difficult wide-band stable transmission, and achieve stable transmission characteristics, flat top of stop band, and simple structure
Active Publication Date: 2021-07-20
CHANGCHUN NORMAL UNIVERSITY
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[0004] The present invention provides a broadband composite coupling frequency selective surface structure and its unit structure, aiming to solve the technical problem in the prior art that it is difficult to use low-profile FSS to realize broadband stable transmission. The technical scheme is as follows
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[0025] The following is a detailed description of a broadband composite coupling type frequency selective surface structure and its unit structure provided by the present invention in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. .
[0026] Such as figure 1 As shown, a broadband composite coupling type frequency selective surface structure provided in this embodiment includes a first frequency selective surface layer 1, a dielectric layer 2 and a second frequency selective surface layer 3 from top to bottom, and the dielectric layer 2 The dielectric constant is 2.0~5.0, and the thickness d is 0.1mm-0.5mm.
[0027] Such as figure 2 As shown, the first frequency selective surface layer 1 of a broadband composite coupling frequency selective surface structure provided in this embodiment is composed of periodically arranged co...
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Abstract
The invention relates to a novel broadband composite coupling frequency selective surface structure and its unit structure, belonging to the technical field of electromagnetic fields and microwaves. The frequency selective surface proposed by the present invention includes from top to bottom: a first frequency selective surface layer, a dielectric layer and a second frequency selective surface layer, wherein the first frequency selective surface layer is composed of periodically arranged composite periodic unit structures, and the second frequency selective surface layer The second frequency selective surface layer is composed of Y-shaped aperture units arranged periodically on the metal screen, the dielectric constant of the dielectric layer is 2.0~5.0, and the thickness is 0.1mm-0.5mm. The invention has the advantages of simple structure of the periodic unit, low profile, easy conformal application, ultra-wide stopband bandwidth, flat top of the stopband, good steepness of the stopband edge, and good incident angle stability.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to a broadband composite coupling frequency selective surface structure and a unit structure thereof. Background technique [0002] Frequency selective surface (FSS) is an artificial electromagnetic material that can regulate electromagnetic waves. It has a unique filtering function and is widely used in radar stealth, aerospace, satellite communication and other fields. Frequency selective surface is also the main technology for the stealth performance of new weapons and equipment and the improvement of the stealth performance of existing weapons and equipment, and is widely used in visible light, infrared, millimeter wave, microwave and other wave bands. [0003] With the development and application of wideband and ultra-wideband radars, the demand for wideband communication is increasing, and the demand for wideband characteristics of FSS...
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IPC IPC(8): H01Q15/08
CPCH01Q15/08
Inventor 焦健曾雪锋
Owner CHANGCHUN NORMAL UNIVERSITY