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Modified polyurethane foam and method for preparing low-density luneberg lens by using the same

A polyurethane foam and Lumber lens technology, applied in antennas, electrical components, etc., can solve the problems of reducing material tangent loss, low density, and low density, and achieve low error rate, low density, and low density.

Active Publication Date: 2020-10-09
CHENGDU XINGUANG MICROWAVE ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to provide a modified polyurethane foam, which is obtained by modifying the polyurethane foam with the high dielectric constant composite modifier of the present invention, has low density, reduces material tangent loss, and can be used to prepare low-density Lunberg lens, which solves the defects of the existing lenses prepared by foaming technology and the problem that there is no Lunberg lens applied to the low frequency band (698-960MHz frequency band)

Method used

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  • Modified polyurethane foam and method for preparing low-density luneberg lens by using the same
  • Modified polyurethane foam and method for preparing low-density luneberg lens by using the same
  • Modified polyurethane foam and method for preparing low-density luneberg lens by using the same

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Embodiment 1

[0066] The Lunberg lens is designed to be 8 layers, and the blocks and cores of each dielectric spherical shell are prepared according to the formula in Table 1, wherein the mass ratio of CCTO:Al is 2:1, and the dielectric constant and tangent angle of the prepared materials of each layer Losses are also shown in Table 1:

[0067] Table 1

[0068]

[0069] In the present invention, in order to make the dielectric constant of each layer of material meet the requirements, the mass consumption of modifier is determined by the following formula:

[0070] The lens has 1-n layers from outside to inside. n is 3 to 50 layers, more preferably 5 to 8 layers.

[0071] The mass M1 of the modifier of the first layer=m×(V1 / v), the unit is g or Kg.

[0072] Where V1 is the volume of the first layer of material, in mL (or L). m is the mass coefficient, the value is 0.6-1.2, more preferably 0.8-1.0; v is the volume coefficient, the value is 100-150, more preferably 120-130.

[0073] Th...

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Abstract

The invention discloses modified polyurethane foam and a method for preparing a low-density luneberg lens by using the modified polyurethane foam. Copper calcium titanate and aluminum silver powder are used as the modifier, a soaking rolling method is utilized to modify a polyurethane foam base material, so that the modifier uniformly grows in a three-dimensional network structure of a polyurethane flexible foam, the modified polyurethane foam with different dielectric constants is obtained by changing the formula proportion of the modifier, the density and tangent angle loss of the compositematerial are effectively reduced by using the method, and the uniformity of the dielectric constant of the composite material is improved. The luneberg lens prepared by the preparation method disclosed by the invention is low in loss, stable in performance, light in weight even if the size is large, movable by a single person, convenient to transport, install and use, simple in processing mode andlow in error rate, and can realize large-batch industrial production.

Description

technical field [0001] The invention relates to the fields of dielectric material and Luneburg lens manufacturing, in particular to a modified polyurethane foam and a method for preparing a low-density Luneburg lens with it. Background technique [0002] With the development of wireless communication technology, the rich application of wireless network drives the rapid growth of wireless data services. According to authoritative forecasts, data services will grow at a rate of 1.6-2 times per year in the next 10 years, which will bring huge challenges to wireless access networks. Therefore, it is necessary for future communication system designs to utilize bandwidth resources more efficiently. Significantly improve spectral efficiency. The 5G frequencies of China Mobile and China Radio and Television are distributed in the low-frequency band below 3GHz, and the frequency of China Radio and Television is distributed in the 700MHz frequency band below 1GHz. Although this frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/42C08L75/04C08L83/04C08K13/02C08K3/24C08K3/08C08K5/42H01Q15/08H01Q19/06
CPCC08J9/40C08J9/42H01Q15/08H01Q19/06C08J2375/04C08J2483/04C08K3/24C08K2003/0812C08K5/42C08K13/02
Inventor 李正武余才文陈祖云江鸥汪长虹李荣张勇刘清兵李纯阳连波
Owner CHENGDU XINGUANG MICROWAVE ENG
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