Electromagnetic wave-absorbing wall
First Claim
1. An electromagnetic wave-absorbing wall comprising an array of ferrimagnetic plates affixed by one face to the surface of an electroconductive substrate arranged at spaced-apart intervals in the direction of the electric field of the electromagnetic wave and closely in the direction of the magnetic field thereof, in which the rate of interval and the thickness of ferrimagnetic plates are arranged according to the following relationship:
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space="preserve" listing-type="tabular">______________________________________ Rate of Interval Thickness of ferrimagnetic plate ##STR21## (d) ______________________________________ <
20% 0.5d.sub.o ˜
1.5d.sub.o 20% ˜
40% 0.7d.sub.o ˜
2.0d.sub.o 40% ˜
60% 1.0d.sub.0 ˜
2.5d.sub.o 60% ˜
80% 1.5d.sub.o ˜
4.5d.sub.o ______________________________________ wherein "l" is the width of the ferrimagnetic plate, "g" is the interval between the ferrimagnetic plates, "do " is the thickness of ferrimagnetic plate which would result in maximum attenuation at no interval between plates, and "d" is the thickness of the ferrimagnetic plate at said interval.
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Accused Products
Abstract
Electromagnetic wave-absorbing wall comprising ferrimagnetic plates arranged at some intervals in the direction of the electric field of the electromagnetic wave said ferrimagnetic plates being plates of ferrite having the following general formula:
MFe.sub.2 O.sub.4
wherein M is a bivalent metal such as Mn, Ni, Co, Mg, Cu, Zn and Cd, or plates of a mixture of ferrite powders or carbonyl iron with organic high molecular weight compounds, and said plates having a specified thickness according to the interval.
48 Citations
9 Claims
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1. An electromagnetic wave-absorbing wall comprising an array of ferrimagnetic plates affixed by one face to the surface of an electroconductive substrate arranged at spaced-apart intervals in the direction of the electric field of the electromagnetic wave and closely in the direction of the magnetic field thereof, in which the rate of interval and the thickness of ferrimagnetic plates are arranged according to the following relationship:
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space="preserve" listing-type="tabular">______________________________________ Rate of Interval Thickness of ferrimagnetic plate ##STR21## (d) ______________________________________ <
20% 0.5d.sub.o ˜
1.5d.sub.o 20% ˜
40% 0.7d.sub.o ˜
2.0d.sub.o 40% ˜
60% 1.0d.sub.0 ˜
2.5d.sub.o 60% ˜
80% 1.5d.sub.o ˜
4.5d.sub.o ______________________________________wherein "l" is the width of the ferrimagnetic plate, "g" is the interval between the ferrimagnetic plates, "do " is the thickness of ferrimagnetic plate which would result in maximum attenuation at no interval between plates, and "d" is the thickness of the ferrimagnetic plate at said interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification