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A wave-absorbing cone used in an anechoic chamber

A technology for anechoic chambers and cones, applied in applications, household appliances, electrical components, etc., can solve the problems of high cost and large consumption of anechoic chambers, and achieve good frost resistance and corrosion resistance, good structural compactness, and mechanical strength The effect of excellent performance

Active Publication Date: 2020-10-09
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the inner walls and ceiling of the anechoic chamber are covered with such triangular pyramid-structured absorbing materials, the consumption will be very large, resulting in high cost of the anechoic chamber.

Method used

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  • A wave-absorbing cone used in an anechoic chamber
  • A wave-absorbing cone used in an anechoic chamber
  • A wave-absorbing cone used in an anechoic chamber

Examples

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preparation example Construction

[0051] The preparation method of the electromagnetic wave transmissive composite material comprises the following steps:

[0052] (1) prepare alkali activator: water, water glass and sodium hydroxide are mixed, stir, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=(45~55 ):1:2;

[0053] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir evenly to obtain a mixed ash body, then add an alkali activator, and stir evenly to obtain the first alkali-activated slag Cementitious material; by mass ratio, fly ash: slag = (7:5) ~ (10:3), mixed ash body: alkali activator = 1: (0.4 ~ 0.5);

[0054] (3) Sodium bicarbonate is added in the epoxy resin glue, stir evenly, obtain mixture A; According to mass volume ratio, sodium bicarbonate: epoxy resin glue=2~3g:20~30mL;

[0055] (4) Wash the expanded polystyrene particles with deionized water for 2-3 times, and then dry ...

Embodiment 1

[0069] Embodiment 1 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0070] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=50: 1:2;

[0071] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:3, mixed ash body: alkali activator=1:0.4;

[0072] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=1g:10mL;

[0073] (4) Wash the expanded polystyrene particles with deionized water ...

Embodiment 2

[0080] Embodiment 2 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0081] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=45: 1:2;

[0082] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:5, mixed ash body: alkali activator=1:0.45;

[0083] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=2g:30mL;

[0084] (4) Wash the expanded polystyrene particles with deionized water...

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Abstract

The invention discloses a wave-absorbing cone used in an electric wave anechoic chamber. The wave-absorbing cone is a hollow quadrangular pyramid composed of a square bottom plate and four isosceles triangle side plates. The bottom plate and the side plates are composed of a surface and An electromagnetic wave transmitting layer, an electromagnetic wave loss layer and an electromagnetic wave transmitting layer are provided in sequence. The electromagnetic wave transmission layer has a very high electromagnetic wave transmittance, so that electromagnetic waves are easy to be incident on the electromagnetic wave loss layer of each panel, and then consumed and absorbed. The electromagnetic wave loss layer of the panel is continuously consumed and absorbed. The wave-absorbing cone of the present invention not only has excellent electromagnetic wave absorption and loss function, but also has a hollow quadrangular pyramid structure with less material consumption and low preparation cost, which greatly reduces the cost of the anechoic chamber, and also has excellent mechanical properties, strength High, light overall weight, fastening and durable, can meet the requirements of construction engineering.

Description

technical field [0001] The invention relates to an electromagnetic wave-absorbing material, in particular to a wave-absorbing cone used in an anechoic chamber. Background technique [0002] The anechoic room is also called shielded dark room, or non-reflection shielded room, which is composed of electromagnetic shielding room and radio frequency absorbing material. An anechoic chamber with all six inner surfaces covered with absorbing materials is called a full anechoic chamber, which can simulate free space; an anechoic chamber with four inner surfaces and ceilings covered with absorbing materials, and the ground as a reflective surface is called a semi-darkened chamber, which can simulate open space. proving ground. The anechoic chamber is an ideal place for electromagnetic compatibility tests. Since there is no reflected wave in the room, when measuring the radiation emission electromagnetic disturbance and radiation sensitivity of the equipment under test, it will not c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/10C04B20/10C04B18/02H05K9/00C04B16/08C04B14/34
CPCC04B18/027C04B20/1081C04B28/006C04B2111/00258H05K9/0081C04B22/062C04B12/04C04B18/08C04B18/141C04B24/38C04B16/08C04B2103/42C04B38/10C04B20/1055C04B20/1037C04B20/1051C04B18/022C04B14/34
Inventor 赵若红梅超徐安傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
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