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Design method and application of wave-absorbing/wave-transmitting metasurface based on tantalum nitride material

A tantalum nitride and metasurface technology, applied in the field of stealth, can solve problems such as antenna gain loss, and achieve the effect of preserving antenna radiation characteristics and preserving antenna radiation performance

Active Publication Date: 2019-05-03
NORTHWEST UNIV(CN)
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Problems solved by technology

Nevertheless, this method solves the broadband absorption problem of the MA structure, but this method will also cause a huge loss to the gain of the antenna. For example, the gain of the antenna in the literature [14] has dropped by 1dB

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  • Design method and application of wave-absorbing/wave-transmitting metasurface based on tantalum nitride material

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Embodiment Construction

[0033] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] 1 Design and analysis of A / T metasurface

[0035] 1.1 Theoretical analysis of A / T metasurface

[0036] The A / T metasurface with wave-absorbing / wave-transmitting properties consists of three parts: the top is a tantalum nitride MA structure, the middle is a Teflon dielectric plate with a dielectric constant of 2.2, and the bottom is a bandpass FSS. According to the equivalent circuit theory, the tantalum nitride MA structure can be replaced by resistors, capacitors and inductors in series, and the band-pass FSS can be expressed as capacitors and inductors connected in parallel. The dielectric plate can be regarded as a characteristic impedance Z ε transmission line. Based on the above analysis, the equivalent circuit of the A / T metasurface is as follows figure 1 shown [15] .

[0037]Considering t...

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Abstract

The invention discloses a design method and the application of a wave-absorbing / wave-transmitting metasurface based on a tantalum nitride material. A metasurface with dual wave absorbing / transmittingcharacteristics is designed. The metasurface with the dual wave absorbing / transmitting characteristics is composed of three parts, namely a tantalum nitride MA structure arranged at the top of the metasurface, a Teflon dielectric plate with the dielectric constant thereof to be 2.2 and arranged in the middle of the metasurface and a band-pass FSS arranged at the bottom of the metasurface. The metasurface is used for coating a microstrip antenna. The metasurface serves as the coating of the antenna and is of a double-layer structure. The two layers of the metasurface are respectively composed of a tantalum nitride periodic structure and a frequency selective surface structure which are arranged on the two sides of the dielectric plate respectively. A final data result shows that when the wave absorbing / transmitting metasurface designed by the invention is used as the coating of the antenna, the radiation characteristic of the antenna is almost not changed. The maximum reduction amount of the single-station RCS of the antenna can reach 20 dB or above, and the reduction bandwidth of the antenna can reach 5 GHz-19GHz. Meanwhile, the single-station RCS and the double-station RCS of theantenna are obviously reduced within a wide angle range.

Description

technical field [0001] The invention belongs to the field of stealth technology, and in particular relates to a design method and application of a wave-absorbing / transmitting metasurface based on a tantalum nitride material. Background technique [0002] With the maturity of radar detection and anti-missile and anti-ship systems in various countries, the research and development of stealth technology has an increasing impact on the survivability of various weapon systems. An important indicator of stealth technology is the radar cross section (Radar CrossSection, RCS) [1] , the radar cross section refers to the measurement of the return scattering power in a certain direction when the target object is irradiated by electromagnetic waves, and it is an important indicator to characterize the scattering characteristics of the object. The radar cross section is related to the structural parameters of the target itself, and also related to the basic electromagnetic characteristi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H01Q15/00G06F17/50
Inventor 王夫蔚任宇辉李珂高宝建邓周虎陈晓江
Owner NORTHWEST UNIV(CN)
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