Preparation method of interlayer frequency selective surface composite material

A frequency-selective surface and composite material technology, applied to antennas, radiation unit covers, electrical components and other directions suitable for movable objects, can solve the problems of affecting the electromagnetic characteristics of the test piece, poor environmental adaptability, and poor maintenance performance

Active Publication Date: 2015-09-23
EAGLES MEN AERONAUTIC SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of test piece has great limitations. Putting the frequency selective surface metal layer on the surface of the medium will lead to poor maintenance performance and poor environmental adaptability. The surface protective coating will also affect the electromagnetic characteristics of the test piece and even lead to performance failure.

Method used

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  • Preparation method of interlayer frequency selective surface composite material
  • Preparation method of interlayer frequency selective surface composite material
  • Preparation method of interlayer frequency selective surface composite material

Examples

Experimental program
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Embodiment 1

[0036] See figure 1 — Figure 9 , a method for preparing an interlayer frequency selective surface composite material of the present invention, the specific steps of the method are as follows:

[0037] 1. Select cyanate resin and epoxy resin to prepare mixed resin;

[0038] 2. Put the mixed resin prepared in step 1 into the dipping tank to prepare a 0.1mm thick glass fiber prepreg for later use;

[0039] 3. Choose 500×500 adhesive-free polyimide copper-clad foil, and use printed circuit board technology to etch frequency-selective surface gap units on the copper foil, and the unit form is a ring unit;

[0040] 4. Select the prepreg prepared in step 2 and cut it into 500×500;

[0041] 5. Clean the surface of the mold, and then put it in an oven for preheating, the temperature is controlled at 38°C;

[0042] 6. Press image 3 Lay the good prepreg and adhesive-free polyimide copper clad foil in step 3 and step 4;

[0043] 7. Vacuumize the prepreg laid in step 6 and the adhe...

Embodiment 2

[0053] 1. Select cyanate resin and epoxy resin to prepare mixed resin;

[0054] 2. Put the mixed resin prepared in step 1 into the dipping tank to prepare a 0.1mm thick glass fiber prepreg for later use;

[0055] 3. Choose 1000×1000 adhesive-free polyimide copper-clad foil, and use printed circuit board technology to etch the frequency-selective surface gap unit on the copper foil, and the unit form is a ring unit;

[0056] 4. Select the prepreg prepared in step 2, the copper foil prepared in step 3 and the 8mm dielectric honeycomb board to cut into a sector with a radius of 0.7m and a central angle of 123°;

[0057] 5. Clean the surface of the mold, and then put it in an oven for preheating, the temperature is controlled at 38°C;

[0058] 6. Press Figure 7 Lay the prepreg, copper foil and honeycomb panels prepared in step 4;

[0059] 7. Vacuumize the prepreg, copper foil and honeycomb panel laid in step 6, and the vacuum degree is 1×10 -1 MPa;

[0060] 8. Prepare the te...

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Abstract

The invention provides a preparation method of an interlayer frequency selective surface composite material, comprising 12 steps. The technical scheme comprises: manufacturing frequency selective surface films; and adding the thin films among prepreg layers of glass fibre cloth and epoxy resin to be laminated together. The method obtains conspicuous hiding effects under the condition of not changing the profile design of an original aircraft radome, and has no reverse impact on the electrical characteristics of an original radar system and the mechanical strength of a radome; a frequency selective surface bandpass radome is practical and feasible to solve the technical problem of invisibility of a radar antenna system.

Description

technical field [0001] The invention provides a method for preparing an interlayer frequency selective surface composite material, which belongs to the technical field of radar stealth. Background technique [0002] Radar stealth technology can greatly improve the combat and survivability of weapons and equipment, has important military value, and has become one of the indispensable key technologies of modern weapons and equipment. The main goal of radar stealth is to reduce the radar cross section of the target, that is, the echo signal detected by the enemy radar is as weak as possible, so as to achieve the stealth effect. Taking an aircraft as an example, components such as the cockpit, air intake, and radar cabin are all factors that cause strong scattering. Reducing the radar cross section of these sub-components is an important technical approach for radar stealth of the entire aircraft. Among them, the radar cabin is the most special target. In addition to the cavity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q1/42H01Q1/28
Inventor 章欣张丽娇
Owner EAGLES MEN AERONAUTIC SCI & TECH GRP
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