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    Electromagnetic Wave Absorber
    11.
    发明申请
    Electromagnetic Wave Absorber 失效
    电磁波吸收器

    公开(公告)号：US20080257599A1

    公开(公告)日：2008-10-23

    申请号：US11664101

    申请日：2005-09-29

    申请人： Masato Matsushita ,  Takahiro Yoshida ,  Haruhide Go ,  Yoshiharu Kiyohara ,  Makoto Maezawa ,  Shinichi Sato

    发明人： Masato Matsushita ,  Takahiro Yoshida ,  Haruhide Go ,  Yoshiharu Kiyohara ,  Makoto Maezawa ,  Shinichi Sato

    IPC分类号： H05K9/00

    CPC分类号： H05K9/0088 ,  H01Q15/0013 ,  H01Q17/00 ,  H01Q17/007

    摘要： A conductive pattern basically has a substantially polygonal outline shape which is a polygon and can have a high peak value of the electromagnetic wave absorption amount as compared to a case when the conductive pattern has a circular outline shape. Thus, the conductive pattern is basically a polygon and at least one corner portion is shaped in curve. This reduces or even minimizes the shift of the frequency at which the absorption amount becomes a peak value by the polarization direction of the electromagnetic wave. Accordingly, in at least one embodiment, it is possible to realize an electromagnetic absorber having an excellent electromagnetic wave absorption characteristic exhibiting a high peak value of the absorption amount of the electromagnetic wave and a small shift of frequency at which the absorption amount becomes a peak value by the polarization direction of the electromagnetic wave.

    摘要翻译： 与导电图案具有圆形轮廓形状的情况相比，导电图案基本上具有基本上多边形的轮廓形状，其是多边形并且可以具有高的电磁波吸收量的峰值。 因此，导电图案基本上是多边形，并且至少一个角部成形为曲线。 由此，通过电磁波的偏振方向使吸收量成为峰值的频率的偏移减少甚至最小化。 因此，在至少一个实施方式中，可以实现具有优异的电磁波吸收特性的电磁吸收体，其表现出电磁波吸收量的高峰值，吸收量变为峰值的频率偏移小 值由电磁波的偏振方向。

    Radio wave absorber
    12.
    发明授权
    Radio wave absorber 失效
    无线电波吸收器

    公开(公告)号：US06677881B1

    公开(公告)日：2004-01-13

    申请号：US09642740

    申请日：2000-08-18

    申请人： Katsumi Okayama

    发明人： Katsumi Okayama

    IPC分类号： H01Q1700

    CPC分类号： H01Q17/008 ,  H01L23/552 ,  H01L2924/0002 ,  H01Q17/00 ,  H01Q17/007 ,  H05K1/0233 ,  H01L2924/00

    摘要： A magnetic material exhibiting a high permeability at a high frequency range is materialized and a radio wave absorber exhibiting an excellent radio wave absorbing property by using such magnetic material is provided. The radio wave absorber comprises a mixed material containing a magnetic material grain, a resin material and a ceramic material or a low-melting-point metal material, in which the magnetic material grain is made into a disc shape is provided.

    摘要翻译： 实现了在高频范围内具有高磁导率的磁性材料，并且提供了通过使用这种磁性材料表现出优异的无线电波吸收特性的电波吸收体。 无线电波吸收器包括含有磁性材料颗粒的磁性材料颗粒，树脂材料和陶瓷材料或低熔点金属材料的混合材料，其中磁性材料颗粒被制成盘形。

    Radiation absorber
    13.
    发明申请
    Radiation absorber 失效
    辐射吸收器

    公开(公告)号：US20030148133A1

    公开(公告)日：2003-08-07

    申请号：US10257975

    申请日：2002-10-28

    发明人： Nils Gustafsson

    IPC分类号： B32B027/08

    CPC分类号： H01Q17/001 ,  H01Q17/00 ,  H01Q17/007 ,  H01Q17/008 ,  Y10T428/31909 ,  Y10T428/31931

    摘要： A radiation absorber which is placed on the irradiated side of a conductive surface (L) whose surface resistance

    摘要翻译： 辐射吸收体放置在表面电阻<0.1欧米亚/平方的导电面（L）的照射面上。 辐射吸收器包括三层，从所述导电表面向外由第一电介质（B1），电阻层（C1）和第二电介质（B2）组成。 电阻层的表面电阻为225欧姆/平方±25％，层的厚度无可能的载流子<0.2mm。 两个电介质层的介电常数εi= 2±25％及其厚度具有相同的数量级。 包含所有层的吸收体的总厚度dA根据公式 1 = 1 · 4 <数学>文件id =“MATHEMATICA-00001”file =“US20030148133A1-20030807-M00001.NB”/> 以给出以米表示的期望波长的吸收峰。

      Device and method of heating components made of microwave absorbing plastic
      14.
      发明授权
      Device and method of heating components made of microwave absorbing plastic 失效
      加热由微波吸收塑料制成的组件的装置和方法

      公开(公告)号：US06420688B1

      公开(公告)日：2002-07-16

      申请号：US09572519

      申请日：2000-05-17

      申请人： Rudolf Emmerich ,  Michael Jauss ,  Armin Dommer ,  Horst Muegge

      发明人： Rudolf Emmerich ,  Michael Jauss ,  Armin Dommer ,  Horst Muegge

      IPC分类号： H05B668

      CPC分类号： H05B6/76 ,  B29B13/025 ,  B29C65/1425 ,  B29C65/1432 ,  B29C66/1142 ,  B29C66/3242 ,  B29C66/5221 ,  B29C66/71 ,  B29C66/73921 ,  B29C66/91212 ,  B29C66/91216 ,  B29C66/91221 ,  B29C66/91411 ,  B29C66/91431 ,  B29C66/91441 ,  B29C66/91641 ,  B29C66/961 ,  B29C2035/0855 ,  H01Q17/00 ,  H01Q17/007 ,  H05B6/72 ,  B29K2027/06 ,  B29K2027/14 ,  B29K2077/00

      摘要： Device for heating components 8, 8′ of a microwave-absorbing plastic material, said device incorporating a microwave generator 1 which generates microwaves of a particular frequency, an antenna 4 with at least one free end 5, 5′ to which the microwaves are conducted, and an enclosure 6 surrounding and shielding the antenna 4, with a heating zone 9, 9′ provided between the free end 5, 5′ of the antenna 4 and the shielding enclosure 6 for the localized heating of the components 8, 8′, said device featuring in the area of the heating zone 9, 9′ at least one temperature sensor 11, 11′ which is interactively unaffected by the microwaves and which is capable of determining the temperature of the component 8, 8′ during the heating process. This device in combination with the associated process for heating components 8, 8′ permits the monitoring of the temperature in the heating zone 9, 9′, thus ensuring a consistent quality level of the heated components.

      摘要翻译： 用于加热微波吸收塑料材料的组件8,8'的装置，所述装置包括产生特定频率的微波的微波发生器1，具有至少一个自由端5,5'的天线4，微波进入微波发生器1 以及围绕和屏蔽天线4的外壳6，其中设置在天线4的自由端5,5'和屏蔽外壳6之间的加热区9,9'用于部件8,8'的局部加热， 所述装置特征在于加热区域9,9'至少一个温度传感器11,11'的区域，该温度传感器11,11'交互地不受微波影响，并且能够在加热过程中确定部件8,8'的温度。 该装置与用于加热部件8,8'的相关联的加工组合允许监测加热区域9,9'中的温度，从而确保加热部件的质量水平一致。

      Simulated infinite ground screen in an RF test chamber
      15.
      发明授权
      Simulated infinite ground screen in an RF test chamber 失效
      在RF测试室中模拟无限地面屏幕

      公开(公告)号：US5844417A

      公开(公告)日：1998-12-01

      申请号：US792466

      申请日：1997-01-31

      申请人： Samuel M. Babb ,  Lowell E. Kolb

      发明人： Samuel M. Babb ,  Lowell E. Kolb

      IPC分类号： G01R29/10 ,  G01R29/08 ,  H01Q17/00 ,  H05K9/00 ,  G01R27/28

      CPC分类号： H01Q17/008 ,  G01R29/0821 ,  H01Q17/00 ,  H01Q17/007 ,  H05K9/0001

      摘要： The degree of variation in the normalized site attenuation of an RF test chamber may be reduced by adjusting the properties of the RF absorbers lining the walls of the RF test chamber such that for the frequencies of greatest variation the ground screen formed by the conductive floor of the chamber appears to be much greater than its actual finite size. This may be done by progressively reducing the degree of chamber wall absorption (for the frequencies of interest) for locations on the walls closer to the floor. The reduction begins at a height above the floor equal to the height of the device under test above the floor, and proceeds to some maximum reduction in absorption at the level of the floor. The reduction in absorption has the effect of making the ground screen appear to be much larger than it really is, and may be obtained either by spacing the absorbing tiles apart by increasing amounts nearer to the floor, or by using less absorptive tiles closer to the floor, or both.

      摘要翻译： RF测试室的归一化位置衰减的变化程度可以通过调整衬套在RF测试室的壁上的RF吸收体的性质来降低，使得对于最大变化的频率，由导电层的 该房间似乎比其实际有限尺寸大得多。 这可以通过逐渐减小靠近地板的壁上的位置的室壁吸收程度（感兴趣的频率）来完成。 减速从地板上方的高度开始等于被测设备的高度，高于地面，并且在地面水平上进行一些最大的吸收减小。 吸收的减少具有使地面屏幕看起来比实际大得多的效果，并且可以通过将吸收瓦片间隔开来，通过增加接近地板的量来获得，或者通过使用较少的吸收性瓷砖 地板或两者。

      Metamaterial system endowing object with adjustable radar profile
      17.
      发明授权
      Metamaterial system endowing object with adjustable radar profile 有权

      公开(公告)号：US11894613B1

      公开(公告)日：2024-02-06

      申请号：US18191287

      申请日：2023-03-28

      申请人： Notch, Inc.

      发明人： Shahriar Khushrushahi

      IPC分类号： H01Q17/00

      CPC分类号： H01Q17/007

      摘要： Vehicles with adjustable metamaterial systems, integrated on the outside or inside of their non-conductive fuselage, have the ability to control their radar cross section dynamically for the purposes of evading detection or spoofing their size by looking larger or more numerous. The frequency response of a metamaterial system can be obtained by combining the RF properties of the individual metamaterial layers that comprise it. A first metamaterial layer that can controllably switch between transmissive and reflection in a relevant frequency band and a second absorptive layer results in a controllable radar cross-section with the ability of controlling the amplitude of the reflected radar pulse. The first layer can be modulated with a repetitive waveform to change the phase of a reflected wave that results in a doppler shift in frequency. The frequency of the modulation can result in a change in range, velocity, or combinations of both. The waveform used can also create a linear change of phase or can be made pseudorandom to create decoy targets that appear to move with random ranges and velocities as detected by a radar. The metamaterial layers can also have a separate passband for allowable communications, navigations, or for other wireless uses within the vehicle. The passband itself can also be switchable or tunable to allow for multiple passband frequencies.

      Programmable wire filaments and devices
      18.
      发明授权
      Programmable wire filaments and devices 有权

      公开(公告)号：US11706908B2

      公开(公告)日：2023-07-18

      申请号：US17555804

      申请日：2021-12-20

      申请人： Raytheon Company

      发明人： Catherine Trent

      IPC分类号： H05K9/00 ,  H01Q17/00 ,  H01B7/00 ,  H01B17/54 ,  H01C10/50 ,  H01H37/34

      CPC分类号： H05K9/009 ,  H01B7/0054 ,  H01B17/54 ,  H01C10/50 ,  H01Q17/007 ,  H05K9/0071 ,  H01H37/34

      摘要： A switchable wire includes filaments, each of which includes a heat-activated material layer that may be indirectly heated to change its state between different states having different electrical conductivity. In an example embodiment the indirect heating may be electrically resistance heating by passing electrical current through an electrically-resistive core of the filament. The heat passing through an electrically-insulative coating around the core, and into a heat-activated material layer around the electrically-insulative coating. The heat-activated material may be a chalcogenide material that is shiftable between a crystalline electrically-conducting state and an amorphous electrically-insulating state. The state of the material may be controlled by controlling the heating profile through controlling heating in the core. Many such filaments may be twisted together to form a switchable wire. Such wires may be used in any of a variety of devices where switchable electrical conductivity is desired.

      Controller barrier layer against electromagnetic radiation
      20.
      发明授权
      Controller barrier layer against electromagnetic radiation 有权
      控制器屏障层抵抗电磁辐射

      公开(公告)号：US09306290B1

      公开(公告)日：2016-04-05

      申请号：US10584561

      申请日：2007-05-31

      申请人： Anders Grop

      发明人： Anders Grop

      IPC分类号： H01Q17/00 ,  H01Q15/22 ,  H01Q1/42 ,  H01Q15/00

      CPC分类号： H01Q17/00 ,  H01Q1/42 ,  H01Q1/422 ,  H01Q15/0013 ,  H01Q15/22 ,  H01Q15/24 ,  H01Q17/007 ,  H01Q17/008

      摘要： The present invention relates to a controllable barrier layer against electromagnetic radiation, to be used, inter alia, as a radome for a radar antenna for instance. The barrier layer comprises a first frequency selective layer (4) of a given geometric shape, said frequency selective layer transmitting radiation of a certain polarization within a desired frequency band and reflecting radiation of a different polarization and radiation outside said band and at least a second identical frequency selective layer, which is placed close to or in connection with the first layer in the radiation direction. The layers are configured to be placed in a first position relative to each other so that they together obtain transmission properties similar to those of the first layer alone and in a second position relative to each other so that they together reflect radiation of said certain polarization within said desired frequency band.

      摘要翻译： 本发明涉及一种抵抗电磁辐射的可控制的阻挡层，特别是用作雷达天线的天线罩。 所述阻挡层包括具有给定几何形状的第一频率选择层（4），所述频率选择层在期望的频带内传送某种偏振的辐射并且反射所述频带外的不同偏振和辐射的辐射，并且至少第二 相同的频率选择层，其放置在辐射方向上靠近或与第一层连接。 这些层被配置为相对于彼此放置在第一位置，使得它们一起获得与第一层相似的传输特性，并且相对于彼此在第二位置中，使得它们一起反射所述某些偏振的辐射 所述期望频带。