Broad-band radio wave absorber
First Claim
1. A broad-band radio wave absorber comprising a radio wave reflecting surface lying in a plane defined by X- and Y-axes, and a plurality of magnetic members provided on said reflecting surface and arranged in columns and rows in the directions of the X- and Y-axes, respectively,each of said magnetic members comprising(a) a first layer provided on said reflecting surface and including a first section extending in parallel with the Y-axis and havinga length L along the Y-axis,a height H along a Z-axis normal to the X- and Y-axes anda width W along the X-axis and a second section extending in parallel with the X-axis and havinga length along the X-axis equal to L,a height along the Z-axis equal to H anda width along the Y-axis equal to W, and(b) a second layer superimposed on said first layer and including at least one cylindrical block having a central axis oriented in parallel with the Z-axis,said at least one cylindrical block having a maximum diameter D,said first sections of respective magnetic members in each row being aligned and said second sections of respective magnetic members in each column being aligned,said first and second sections of each of said magnetic members perpendicularly intersecting and bisecting each other at a position aligned with said central axis,the distance between the central axes of adjacent two magnetic members in each column and in each row is P,wherein L, D, W and P meet with the following conditions:
- L=PD<
PW<
P.
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Abstract
A broad-band radio wave absorber including a radio wave reflecting surface, and a plurality of magnetic members provided on the reflecting surface and arranged in columns and rows, each of the magnetic members being composed of a first layer in the form of a square tile or a cross and a second layer superimposed on the first layer and having at least one cylindrical block having a diameter smaller than the width of the first layer. The first layers of adjacent two magnetic members are in contact with each other. When the second layer has a plurality of cylindrical blocks, they are coaxially superimposed in turn in a step wise manner.
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Citations
9 Claims
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1. A broad-band radio wave absorber comprising a radio wave reflecting surface lying in a plane defined by X- and Y-axes, and a plurality of magnetic members provided on said reflecting surface and arranged in columns and rows in the directions of the X- and Y-axes, respectively,
each of said magnetic members comprising (a) a first layer provided on said reflecting surface and including a first section extending in parallel with the Y-axis and having a length L along the Y-axis, a height H along a Z-axis normal to the X- and Y-axes and a width W along the X-axis and a second section extending in parallel with the X-axis and having a length along the X-axis equal to L, a height along the Z-axis equal to H and a width along the Y-axis equal to W, and (b) a second layer superimposed on said first layer and including at least one cylindrical block having a central axis oriented in parallel with the Z-axis, said at least one cylindrical block having a maximum diameter D, said first sections of respective magnetic members in each row being aligned and said second sections of respective magnetic members in each column being aligned, said first and second sections of each of said magnetic members perpendicularly intersecting and bisecting each other at a position aligned with said central axis, the distance between the central axes of adjacent two magnetic members in each column and in each row is P, wherein L, D, W and P meet with the following conditions: -
L=P D<
PW<
P. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A broad-band radio wave absorber comprising a radio wave reflecting surface lying in a plane defined by X- and Y-axes, and a plurality of magnetic members provided on said reflecting surface and arranged in columns and rows in the directions of the X- and Y-axes, respectively,
each of said magnetic members comprising (a) a first layer in the form of a square plate provided on said reflecting surface and having a length L along the Y-axis, a height H along a Z-axis normal to the X- and Y-axes and a width W along the X-axis; - and
(b) a second layer superimposed on said first layer and including a plurality of cylindrical blocks coaxially superimposed in a step-wise manner, along a central axis oriented in parallel with the Z-axis, each of said first cylindrical blocks having a maximum diameter D, and wherein the distance between the central axes of adjacent two magnetic members in each column and in each row is P, wherein L, D, W and P meet with the following conditions; L=P=W H≦
P.
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Specification
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- Resources
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Current AssigneeMichiharu Takahashi
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Original AssigneeMichiharu Takahashi
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InventorsTakahashi, Michiharu
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Primary Examiner(s)Jordan, Charles T.
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Assistant Examiner(s)MONTGOMERY, CHRISTOPHER KEITH
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Application NumberUS08/751,313Time in Patent Office673 DaysField of Search342/1-4US Class Current342/4CPC Class CodesH01Q 17/008 with a particular shape H01...
