A kind of dissipative broadband absorbing fss structure and preparation method

A wide-band, dissipative technology, applied in the field of dissipative wide-band absorbing FSS structure and preparation, can solve problems such as high wave transmittance and strong absorbing performance, and achieve good angle stability and polarization stability , suppression of parasitic current, high wave transmittance and the effect

Active Publication Date: 2019-11-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Problems solved by technology

However, the existing carbon film is processed into a structural unit, which cannot meet the requirements of high wave transmittance in the HF / VHF band and strong wave absorption in the X-band

Method used

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  • A kind of dissipative broadband absorbing fss structure and preparation method
  • A kind of dissipative broadband absorbing fss structure and preparation method
  • A kind of dissipative broadband absorbing fss structure and preparation method

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific examples and accompanying drawings.

[0031] Take the wave transmission / stealth technical indicators of a ship mast radome as an example, the technical indicators are: working frequency band: HF / VHF, working bandwidth: 500MHz; wave transmission rate: ≥90% (within the working bandwidth), stealth frequency band: X-band , Reflectivity: ≥-20dB. Since the shape of the radome is a non-low RCS shape (elliptical shape), the development plan of the dissipative FSS radome is selected as follows: figure 2 As shown, it consists of a radome cover body 4 , a dissipative FSS substrate 5 , a dissipative FSS film 6 , and a dissipative FSS substrate 7 .

[0032] The FSS unit structure of FSS membrane 6 is as figure 1 , 3 As shown, it is a square with a fractal structure, including a well-shaped structure patch 1 in the center and a large square patch 2 located at the four corners of the square. The e...

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Abstract

The invention discloses a dissipation type broadband wave-absorbing FSS structure and a preparation method. A patch type FSS unit structure is formed on a dielectric plate by adopting a carbon film spraying process; the FSS unit structure is a square fractal structure, and square grids are periodically arranged; the square of the fractal structure comprises a #-shaped structural patch in the center and big square patches in the four corners of the square; the end parts of four arms of the #-shaped structural patch are expanded to form a square cross-shaped structure; and small square patches are symmetrically arranged in the square cross-shaped structure. The special FSS structure, by virtue of the surface resistance characteristic, breaks through the fact that the conventional frequency selection surface stop band has the total reflection characteristic; a lossy network which is formed by the capacitor, inductor, resistor and transmission line is introduced, so that the stop band frequency band can be reduced effectively; and therefore, the technical problem that the application of the existing frequency selection surface is limited by the structural appearance is solved.

Description

technical field [0001] The invention relates to a dissipative broadband wave-absorbing FSS structure and a preparation method, belonging to the technical field of electromagnetic fields and microwaves. Background technique [0002] With the rapid development of modern military technology, the wave-transmitting / stealth technology of aircraft has become the focus and focus of research in various countries. Frequency Selective Surface (FSS) is a spatial electromagnetic filtering structure, which can pass electromagnetic waves without loss or low loss in a specific frequency band, while filtering out electromagnetic waves outside the frequency band. FSS technology has been highly valued since its concept was proposed. If this technology is applied to the aircraft radome, it can realize the normal operation of the own radar, reflect the electromagnetic waves of the enemy radar working frequency band to other directions, and reduce the radar scattering cross section. , so FSS is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/008
Inventor 阳开华张春波杨帆樊君杨洁颖赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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