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Wave absorbing/transmitting device of composite window absorber

An absorber and wave-transmitting technology, which can be applied to antennas, electrical components, etc., can solve the problem of difficulty in taking into account at the same time, and achieve the effects of easy assembly, low cost, and wide absorbing frequency.

Active Publication Date: 2020-05-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the object of the present invention is to provide a wave absorbing / transmitting device for a composite window absorber, wherein the structure of each component of the device and their arrangement are improved to construct The double-layer absorbing layer method can effectively solve the problem that the existing window absorber is difficult to simultaneously take into account both out-of-band dual-band broadband absorbing and in-band broadband wave transmission, thereby ensuring that the radar antenna system has a better out-of-band RCS reduce

Method used

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  • Wave absorbing/transmitting device of composite window absorber
  • Wave absorbing/transmitting device of composite window absorber
  • Wave absorbing/transmitting device of composite window absorber

Examples

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Embodiment 1

[0055]The first wave-absorbing layer 1 is a single-sided copper-clad board. The copper foil is processed with cross-shaped patterns 2 periodically arranged in rows and columns. The width of the cross structure is 1.25 mm. Each cross-shaped pattern 2 is provided with eight slits. Wherein the gap length of welding lumped resistor 15 is 1.5mm, the gap length of welding lumped inductance 16 is 1.0mm, the resistance value of any one lumped resistor 15 is 50ohm, the inductance value of any one lumped inductor 16 is 10nH, ten The FSS unit period of the first layer of wave-absorbing layer composed of zigzag pattern 2, lumped resistance 15 and inductance 16 is 18mm; the first dielectric isolation layer 3 is made of aramid paper honeycomb material with a thickness of 8.5mm, and its relative permittivity is 1.07, and the dielectric loss tangent is 0.0017. The second wave-absorbing layer 4 is a single-sided copper-clad board. The copper foil is processed with cross patch patterns 5 and op...

Embodiment 2

[0058] The first wave-absorbing layer 1 is a single-sided copper-clad board, and the copper foil is processed with cross-shaped patterns 2 periodically arranged in rows and columns. The width of the cross-shaped structure is 2 mm, and each cross-shaped pattern 2 is provided with eight slits. The gap length of welding lumped resistor 15 is 1.5mm, the gap length of welding lumped inductance 16 is 1.0mm, the resistance value of any one lumped resistor 15 is 50ohm, the inductance value of any one lumped inductor 16 is 8nH, cross-shaped Pattern 2, lumped resistance 15 and inductance 16 form the first wave-absorbing layer FSS unit period is 20mm; the first dielectric isolation layer 3 is made of aramid paper honeycomb material with a thickness of 8.5mm, and its relative permittivity is 1.07, and the dielectric loss tangent is 0.0017. The second wave-absorbing layer 4 is a single-sided copper-clad board. The copper foil is processed with cross patch patterns 5 and open square ring pa...

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Abstract

The invention belongs to the field of radar stealth, and discloses a wave absorbing / transmitting device of a composite window absorber. The wave absorbing / transmitting device sequentially comprises afirst wave-absorbing layer (1), a first dielectric isolation layer (3), a second wave-absorbing layer (4), a second dielectric isolation layer (7), a third wave-transmitting layer (8), a third dielectric isolation layer (11) and a fourth wave-transmitting layer (12) from top to bottom, wherein the first wave-absorbing layer (1) is provided with a cross-shaped pattern (2) array, the second wave-absorbing layer (4) is provided with a framed cross-shaped pattern array, and the third wave-transmitting layer (8) and the fourth wave-transmitting layer (12) are respectively provided with framed square pattern arrays. According to the invention, by improving the structure of each component of the device, the arrangement mode of the components and the like to construct the double wave absorbing layers, the problem that the existing window wave absorbing body cannot give consideration to out-of-band bilateral double-frequency-band broadband wave absorption and in-band broadband wave transmissionat the same time is effectively solved, and thus the radar antenna system is ensured to have better out-of-band RCS reduction.

Description

technical field [0001] The invention belongs to the field of radar stealth, and more specifically relates to a wave-absorbing / wave-transmitting device of a composite window absorber, which uses double-layer wave-absorbing layers to respectively absorb waves in two frequency bands, and realizes double-sided broadband wave-absorbing and wave-transmitting devices. The cascaded second-order band-pass filter in the wave layer ensures that the overall structure is wide-band transparent, and the transition frequency band has the characteristics of high selectivity. Background technique [0002] With the development of stealth technology, the offensive and defensive pattern of countries in the world has undergone tremendous changes. For large weapon platforms such as aircraft and ships, the strong scattering of the radar antenna system is the main contributor to the overall radar cross section (RCS:Radar CrossSection). Both traditional shape stealth technology and material stealth ...

Claims

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Application Information

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IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0026H01Q17/008
Inventor 江建军别少伟邓卫缪灵
Owner HUAZHONG UNIV OF SCI & TECH
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