Adjustable-frequency broadband meta-material wave-absorbing structure

Abstract

The invention discloses an adjustable-frequency broadband meta-material wave-absorbing structure, and mainly solves a problem that the adjustable frequency of a broad wave-absorbing frequency band is difficult to achieve in the prior art. The structure mainly comprises a resonance structure (1), a dielectric substrate (2), and a metal floor (3). The resonance structure (1) and the metal floor (3) are respectively located at the upper and lower surfaces of the dielectric substrate (2). The resonance structure (1) consists of a metal square ring (4), a rectangular metal piece (5), a resistor (6), and an inductor (7). The opening of the metal square ring (4) is distributed in a manner of 90-degree rotary symmetry. The rectangular metal piece (5) is symmetrically distributed at the outer side of the metal square ring (4), and is parallel to the corresponding edge of the metal square ring (4). The resistor (6) is located at the opening of the metal square ring (4). The inductor (7) is connected with the corresponding edges of the rectangular metal piece (5) and metal square ring (4). Through the change of resistance and inductance, the structure achieves the continuous and adjustable frequency of a broad wave-absorbing band.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a frequency-adjustable broadband metamaterial wave-absorbing structure. The invention can be widely applied to stealth technology, radar and modern communication systems. Background technique [0002] In recent years, as people pay more and more attention to metamaterial absorbing structures, there are more and more research designs on metamaterial absorbing structures, and people have higher and higher performance requirements for metamaterial absorbing structures. Common broadband Broadband angular polarization-insensitive metamaterial absorbing structures have been unable to meet the needs of modern communication systems for frequency-tunable metamaterial absorbing structures. At present, although some progress has been made in frequency-adjustable broadband metamaterial absorbing structures, further research and improvement are still needed, such as the liter...

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Problems solved by technology

[0002] In recent years, as people pay more and more attention to metamaterial absorbing structures, there are more and more research designs on metamaterial absorbing structures, and people have higher and higher performance requirements for metamaterial absorbing structures. Common broadband Broadband angular polarization-insensitive metamaterial absorbing structures can no longer meet the needs of modern communication systems for frequency-tunable metamaterial absorbing structures

At present, although some progress has been made in frequency-adjustable broadband metamaterial absorbing structures, further research and improvement are still needed, such as the literature "Adjustable low frequency and broadband metamaterial absorber based on magnetic rubber plate and crossresonator, Y.Z.Cheng, Y.Nie, Y.Wang, and R.Z.Gong, J.Appl.Phys., vol.115, no.6, 064902, 2014 "proposed a method based on rubber magnetic plates to achieve broadband tunable metamaterial absorbing structures at low frequencies, although by changing the thickness of the dielectric substrate to harmonize The electrical length of the vibrator realizes the adjustment of the wave-absorbing frequency band, but the wave-absorbing bandwidth is narrow, the manufacturing cost is high, and the adjustment method is not conducive to practical engineering applications

Another example is that the dual-band can Although the absorbing structure of ultra-tunable materials has good adjustability, the absorbing bandwidth is very narrow, which cannot meet the needs of broadband absorbing

Another example is the Chinese patent with the patent application number 201410582139.1 and the patent name "Broadband Absorbing Material Loaded with Lumped Components". Frequency adjustment for wide absorbing frequency band

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