WO2020191911A1 - Procédé de production de lentille de luneburg - Google Patents

Procédé de production de lentille de luneburg Download PDF

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Publication number
WO2020191911A1
WO2020191911A1 PCT/CN2019/087968 CN2019087968W WO2020191911A1 WO 2020191911 A1 WO2020191911 A1 WO 2020191911A1 CN 2019087968 W CN2019087968 W CN 2019087968W WO 2020191911 A1 WO2020191911 A1 WO 2020191911A1
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WO
WIPO (PCT)
Prior art keywords
lens
dielectric layer
granular material
shell
lumber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/087968
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English (en)
Chinese (zh)
Inventor
郑洪振
芦永超
窦英乾
尚春辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Eahison Communication Co Ltd
Original Assignee
Foshan Eahison Communication Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Eahison Communication Co Ltd filed Critical Foshan Eahison Communication Co Ltd
Publication of WO2020191911A1 publication Critical patent/WO2020191911A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material

Definitions

  • the present invention relates to the field of communication equipment production, and more specifically, to a method for producing Lumber lens.
  • Lumber lens technology proposed by RK Luneberg in 1944 based on geometric optics, is used as an antenna and scatterer application, mainly used in fast scanning systems, satellite communication systems, automotive collision avoidance radars, and radar reflectors.
  • the dielectric constant of the dielectric material used for the Lumber lens should change continuously from 2 to 1 from the center of the sphere to the outer diameter, following a certain mathematical law.
  • such an ideal medium does not exist in nature, so discrete spherical shells of layered design are often used in actual design instead.
  • Lumber lens production solutions In order to make the actual performance of the Lumber lens close to the theoretical performance, a variety of Lumber lens production solutions exist, such as:
  • CN201510084764.8 A manufacturing method of a hemispherical Lumber lens antenna
  • CN201510065135.0 A production method of Lumber lens with open structure
  • the above technical solutions include: drilling method, controlling the dielectric constant of the material through the proportion of the material volume occupied by the hole, but this method is difficult to control the density and precision of the drilling, the structure is complex, the manufacturing difficulty is high, and the weight is not suitable Mass production.
  • It also includes a layer-by-layer foaming method. Based on the middle core, it is wrapped layer by layer and foamed layer by layer. This is currently the most commonly used method to obtain a stepped dielectric constant foam material, but whether it is physical foaming, Chemical foaming requires strict temperature and pressure control, and is usually produced under high temperature and high pressure. Due to the low thermal conductivity of the foamed material, uneven foaming will occur. The process technology is complicated, special equipment is required, the yield is low, and the cost is very high.
  • the layers are made independently first, and then these layers are glued together. However, the interface between the layers is obvious. The discontinuity of the dielectric constant between the electromagnetic material layers will increase the lens. Electromagnetic loss reduces the radiation efficiency of the antenna.
  • the technical problem to be solved by the present invention is to provide a new method for producing Lumber lens, which can manufacture Lumber lens with stable index and high performance under the conditions of room temperature, normal pressure and low cost.
  • the production method of Lumber lens includes the following steps:
  • Step 1) Prepare the half shell as the lens half shell, which is made of the material with the lowest dielectric constant as possible;
  • Step 3) Press the first granular material with a punch to make the first granular material adhere to the inner wall of the lens half-shell and thus form a layer with a certain thickness, which is called the first Dielectric layer
  • Step 4) Measure the thickness of the first dielectric layer at this time, if the thickness reaches the preset value, go to step 5); if the thickness does not reach the preset value, continue to spray adhesive on the surface of the first dielectric layer, and then continue to use The first kind of granular material is laid on it and pressed with a punch to make the thickness of the first medium layer reach the preset value;
  • Step 5 Spray adhesive on the surface of the first medium layer, and spread the prefabricated second granular material on the surface of the first medium layer;
  • Step 6) Press the second kind of granular material with a punch to make the second kind of granular material adhere to the first medium layer and thereby form another layer with a certain thickness.
  • This layer is called the second Dielectric layer
  • Step 7) Measure the thickness of the second dielectric layer at this time, if the thickness reaches the preset value, go to step 8); if the thickness does not reach the preset value, continue to spray adhesive on the surface of the second dielectric layer, and then continue to use Lay the second kind of granular material and press with a punch to make the thickness of the second medium layer reach the preset value;
  • Step 8) Comparing steps 5) to 7), make the remaining dielectric layers by analogy;
  • Step 9) Spray adhesive on the surface of the final dielectric layer, fill the final prefabricated granular material into the cavity of the final dielectric layer, and then supplement it with several pressures, spray adhesives and refills Granular material to form a half core in the cavity of the final dielectric layer;
  • Step 10 So far, the lens half-shell is completely filled to become a half Lumber lens
  • Step 12 Glue the two halves of Lumber lens together to form a Lumber lens.
  • the Lumber lens production method adopts the method of adding prefabricated granular materials layer by layer from outside to inside.
  • the two-phase composite part is formed between the two dielectric layers due to the mutual interlocking of the particles.
  • the dielectric constant of the two-phase composite part is between the dielectric constants of the two particulate materials. Between the dielectric constants, the dielectric constant between the dielectric layers of such a Lumber lens, and between the dielectric layer and the half core is smooth, thereby reducing the electromagnetic loss of the Lumber lens product.
  • the profile shape of the Lumber lens produced by this production method is preferably a three-dimensional shape that can be separated axisymmetrically.
  • the Lumber lens produced can be round or spheroid or spheroid or spheroid or cylindrical.
  • the contour shape of the half of the Lumber lens can be cylindrical (half of the two symmetrical halves along the lateral direction of the cylinder), or half. Cylindrical (half of the cylinder divided into two symmetrical halves along the longitudinal direction).
  • the total number of dielectric layers is preferably between 3-20.
  • the structure of the granular material used in each dielectric layer and half of the inner core is preferably: a granular or fibrous metal conductor is mixed into a non-metallic material.
  • the average diameter of the corresponding granular material is preferably getting smaller and smaller.
  • the dielectric constant of the corresponding granular material is better to be larger and larger.
  • the shape of the corresponding granular material can be cubic or spherical.
  • the lens half-shell is preferably always in a mold capable of stabilizing the shape of the lens half-shell.
  • various granular materials can be spread by using a fixed paddle to poke the granular material when the lens half-shell is in a rotating state, or use a rotating paddle when the lens half-shell is in a fixed state
  • the granular material is moved for covering, or when the lens half-shell is in a rotating state, a rotating paddle is used to move the granular material for covering. In this way, various granular materials can be evenly distributed.
  • the production method of the Lumber lens of the present invention has the advantages of simple production process, low production cost, light weight, easy control of lens characteristics, and excellent lens performance indicators.
  • Figure 1 is a schematic diagram of the structure of the target product of Example 1;
  • FIG. 2 is a schematic diagram of the structure in which the first dielectric layer and the second dielectric layer of the embodiment 1 are embedded with each other;
  • FIG. 3 is a schematic diagram of the structure of the half Lumber lens of embodiment 1;
  • this embodiment takes the production of a spherical Lumbert lens with 5 dielectric layers as an example.
  • a Lumber lens is, from the outside to the inside, the lens half shell 10, the first dielectric layer 11, the second dielectric layer 12, the third dielectric layer 13, the fourth dielectric layer 14, the fifth dielectric layer 15, and the half core 16 .
  • the processing method is as follows:
  • Step 1) Prepare a hemispherical shell as the lens half shell 10.
  • Spray adhesive on the inner wall surface of the lens half-shell 10 pour the prefabricated first granular material into the lens half-shell 10, and use a paddle rotating along a fixed axis to dial the first granular material to make The first granular material is uniformly distributed in the lens half-shell 10.
  • a circular arc side is formed on the pick as its working side, and the center of the circle corresponding to the circular arc side is concentric with the center of the lens half shell 10.
  • the first type of particulate material is used to make the first dielectric layer 11
  • the second type of particulate material is used to make the second dielectric layer 12, and so on.
  • the sixth type of granular material is used to make half of the core 16.
  • the granular material of each dielectric layer and the granular material of the half core 16 are all spherical.
  • Step 3) The punch is a mold with a spherical movement.
  • the hemispherical die is a fixed mold.
  • Use a punch to press and hold the first granular material so that the first granular material adheres to the inner wall of the lens half shell 10 and thereby forms a hemispherical shell-shaped layer with a certain thickness. It is called the first dielectric layer 11.
  • the pressure exerted by the punch is not very strong, and it cannot cause excessive deformation of the granular material.
  • Step 4) Measure the thickness of the first dielectric layer 11 at this time. If the thickness reaches the preset value, go to step 5); if the thickness does not reach the preset value, continue to spray adhesive on the surface of the first dielectric layer 11, and then Continue to cover it with the first granular material, and press with a punch to make the thickness of the first dielectric layer 11 reach the preset value.
  • Step 5) Spray adhesive on the surface of the first medium layer 11, pour the prefabricated second granular material into the lens half-shell 10, and use a pick to move the second granular material to make the second
  • the particulate material is uniformly distributed on the surface of the first dielectric layer 11.
  • the diameter of the second kind of granular material can be equal to or smaller than the diameter of the first kind of granular material.
  • the pursuit is that the depth of mutual embedding between the first kind of granular material and the second kind of granular material is as deep as possible. The more uniform the fit, the better, as shown in Figure 2.
  • Step 6) Use a punch to press the second type of granular material to make the second type of granular material adhere to the first dielectric layer 11 and thereby form a hemispherical shell-shaped layer with a certain thickness, which is called It is the second dielectric layer 12.
  • the spherical diameter of the working surface of the punch used at this time is smaller than that of the punch used in step 3). That is, before this step, there may be a step of replacing the punch, or there may be a step of transferring the hemispherical die to another station where a punch with a smaller spherical diameter is arranged on the other station.
  • Step 7) Measure the thickness of the second dielectric layer 12 at this time. If the thickness reaches the preset value, go to step 8); if the thickness does not reach the preset value, continue to spray adhesive on the surface of the second dielectric layer 12, and then Continue to cover it with the second granular material, and press with a punch to make the thickness of the second dielectric layer 12 reach the preset value;
  • Step 8) Comparing steps 5) to 7), make the remaining dielectric layers by analogy;
  • Step 9): The final dielectric layer is the fifth dielectric layer 15.
  • the adhesive is sprayed on the surface of the fifth dielectric layer 15, and the final prefabricated particulate material, that is, the sixth particulate material, is filled into the fifth dielectric layer 15. In the cavity, it is then supplemented with several times of pressure, supplemental spraying of the adhesive and supplement of the sixth particulate material, so that a hemispherical half core 16 is finally formed in the cavity of the fifth medium layer 15.
  • Step 10) So far, the lens half-shell 10 is completely filled to become a half Lumber lens, and the half Lumber lens is hemispherical, as shown in FIG. 3. At this time, it is desirable that the exposed surfaces of all the dielectric layers and the half inner core 16 are sufficiently flush with the hemispherical bottom surface of the lens half shell 10.
  • the pursuit is that the depth of the inter-engaging between the granular materials is as deep as possible, and the uniformity of inter-engaging is as uniform as possible.
  • the granular materials used for each dielectric layer and the half-core core 16 are all prepared in advance, and their structure is: a non-metal foamed material is mixed with a fibrous metal conductor.
  • the dielectric constant of these particle materials can be controlled. For example, if more metal conductors are mixed, the dielectric constant will increase; if more metal conductors are mixed, the dielectric constant will be greater.
  • One of the granular materials can be referred to as "AN ARTIFICIAL DIELECTRIC MATERIAL AND A METHOD OF MANUFACTURING THE SAME", the publication number is WO2009078807, and the publication date is the patent document on June 25, 2009.
  • the Lumber lens produced by the production method of this embodiment has the advantages of light weight, easy control of lens characteristics, and excellent lens performance indicators.
  • a rotating ellipsoid can be understood as a three-dimensional shape formed by rotating an ellipse along its long axis. As shown in Figure 4, such a three-dimensional shape is a three-dimensional shape that can be separated axisymmetrically. There are two ways to separate it axisymmetrically. One kind is to divide the three-dimensional shape into two axisymmetric halves by the plane passing the long axis of the ellipse, for example, the plane A in Figure 4 is used to separate; the other is the plane passing the short axis of the ellipse and perpendicular to the long axis The three-dimensional shape is divided into two axially symmetric halves, for example, in the B plane of FIG. 4.
  • Lumber lens that you want to make is cylindrical, you will also face the same problem of selecting the cutting position.

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  • Aerials With Secondary Devices (AREA)

Abstract

La présente invention concerne un nouveau procédé de production d'une lentille de Luneburg, qui peut produire des lentilles de Luneburg à haute performance qui ont des indices stables dans les conditions de température ambiante, de pression normale et de faibles coûts. Le procédé comprend les étapes suivantes consistant à : préparer un demi-logement sous la forme d'un demi-logement de lentille, pulvériser un adhésif sur une surface de paroi interne du demi-logement de lentille, revêtir un premier matériau particulaire préfabriqué dans le demi-logement de lentille, utiliser un poinçon pour presser le premier matériau particulaire pour former une première couche diélectrique, pulvériser l'adhésif sur une surface de la première couche diélectrique, revêtir un second matériau particulaire sur la surface de la première couche diélectrique et presser, et ainsi de suite pour produire une lentille de Luneburg, puis coller deux demi-lentilles de Luneburg pour former une lentille de Luneburg. Le procédé de production de la lentille de Luneburg de La présente invention présente les avantages d'un procédé de production simple, de faibles coûts de production, d'une masse légère, d'une commande facile de caractéristiques de lentille, d'excellents indices de performance de lentille, etc.
PCT/CN2019/087968 2019-03-26 2019-05-22 Procédé de production de lentille de luneburg Ceased WO2020191911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910225149.2 2019-03-26
CN201910225149.2A CN109994837A (zh) 2019-03-26 2019-03-26 龙伯透镜的生产方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110401039B (zh) 2019-07-29 2021-01-15 广东福顺天际通信有限公司 一种龙伯透镜的生产方法
CN110311227A (zh) * 2019-07-29 2019-10-08 佛山市粤海信通讯有限公司 一种拼叠式龙伯透镜的生产方法
CN110707432B (zh) * 2019-09-18 2021-01-08 佛山市粤海信通讯有限公司 发泡介质材料及发泡介质材料生产方法
CN110911846B (zh) * 2019-12-06 2021-12-14 广东福顺天际通信有限公司 可不使用粘合剂的龙伯透镜生产方法
CN111244640B (zh) * 2020-01-19 2021-07-06 佛山市粤海信通讯有限公司 一种柱体状电磁波透镜的制备方法
CN111463580B (zh) * 2020-04-24 2021-12-14 中国联合网络通信集团有限公司 一种球形介电材料及其生产方法及龙伯透镜
CN111613900B (zh) * 2020-05-29 2021-06-11 西安海天天线科技股份有限公司 一种人工介质多层球透镜制造方法
CN113612032B (zh) * 2021-07-23 2025-05-27 北京高信达通信科技股份有限公司 一种人工介质复合体、人工介质透镜和制造方法
CN113733802A (zh) * 2021-08-30 2021-12-03 徐杏娟 一种用山核桃壳制作镂空饰件的方法

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WO2017165342A1 (fr) * 2016-03-25 2017-09-28 Commscope Technologies Llc Antennes comportant des lentilles formées de matériaux diélectriques légers, et matériaux diélectriques correspondants
CN107959122A (zh) * 2017-08-18 2018-04-24 西安肖氏天线科技有限公司 一种超轻人工介质多层圆柱透镜

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JPH09181523A (ja) * 1995-12-22 1997-07-11 Murata Mfg Co Ltd ルーネベルグレンズ
CN1543577A (zh) * 2001-08-15 2004-11-03 ��Ĭ������΢����Ʒ��˾ 梯度介电常数透镜及制造方法
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CN107959122A (zh) * 2017-08-18 2018-04-24 西安肖氏天线科技有限公司 一种超轻人工介质多层圆柱透镜

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