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UNNECESSARY RADIO WAVE SUPPRESSION METHOD AND ANECHOIC CHAMBER
To provide an anechoic chamber capable of suppressing unnecessary radio waves such as lowering the detection accuracy of an object to be detected due to reflection of radar waves not hitting the object to be detected by an inner wall of the anechoic chamber.SOLUTION: In an anechoic chamber 1A, a radar device 2 and a radio wave absorbing panel 5 are arranged in a shield space 13 not affected by an electromagnetic wave from the outside and not leaking the electromagnetic wave to the outside, and an object 3 to be detected is arranged in an object-to-be-detected arrangement space 4A formed between them. The radio wave absorbing panel 5 is arranged so that a linearly polarized wave of a radar wave RW becomes a TM wave and the TM wave is inclined so as to be incident on a radio wave absorbing surface 51a at a Brewster angle θ, so that the radar wave RW is almost absorbed by a radio wave absorbing plate 51 having the absorbability of the TM wave. Thus, a reflected wave of the radar wave RW not hitting the object 3 to be detected can be prevented from being detected by the radar device 2 as an unnecessary radio wave.SELECTED DRAWING: Figure 1
【課題】被検知体に当たらなかったレーダー波が電波暗室内壁で反射して、被検知体の検知精度を落とすような不要電波となることを抑制できる電波暗室を提供する。【解決手段】電波暗室１Ａは、外部からの電磁波の影響を受けず、外部に電磁波を漏らすこともないシールド空間１３内に、レーダー装置２と電波吸収パネル５を配置し、その間に形成される被検知体配置空間４Ａ内に被検知体３を配置する。電波吸収パネル５は、レーダー波ＲＷの直線偏波がＴＭ波となる向きで、且つＴＭ波をブリュースター角θBで電波吸収面５１ａへ入射するように傾けて配置することで、ＴＭ波の吸収性を備える電波吸収板５１によってレーダー波ＲＷがほぼ吸収される。これにより、被検知体３に当たらなかったレーダー波ＲＷの反射波が不要電波となってレーダー装置２に検知されてしまうことを抑制できる。【選択図】図１
UNNECESSARY RADIO WAVE SUPPRESSION METHOD AND ANECHOIC CHAMBER
To provide an anechoic chamber capable of suppressing unnecessary radio waves such as lowering the detection accuracy of an object to be detected due to reflection of radar waves not hitting the object to be detected by an inner wall of the anechoic chamber.SOLUTION: In an anechoic chamber 1A, a radar device 2 and a radio wave absorbing panel 5 are arranged in a shield space 13 not affected by an electromagnetic wave from the outside and not leaking the electromagnetic wave to the outside, and an object 3 to be detected is arranged in an object-to-be-detected arrangement space 4A formed between them. The radio wave absorbing panel 5 is arranged so that a linearly polarized wave of a radar wave RW becomes a TM wave and the TM wave is inclined so as to be incident on a radio wave absorbing surface 51a at a Brewster angle θ, so that the radar wave RW is almost absorbed by a radio wave absorbing plate 51 having the absorbability of the TM wave. Thus, a reflected wave of the radar wave RW not hitting the object 3 to be detected can be prevented from being detected by the radar device 2 as an unnecessary radio wave.SELECTED DRAWING: Figure 1
【課題】被検知体に当たらなかったレーダー波が電波暗室内壁で反射して、被検知体の検知精度を落とすような不要電波となることを抑制できる電波暗室を提供する。【解決手段】電波暗室１Ａは、外部からの電磁波の影響を受けず、外部に電磁波を漏らすこともないシールド空間１３内に、レーダー装置２と電波吸収パネル５を配置し、その間に形成される被検知体配置空間４Ａ内に被検知体３を配置する。電波吸収パネル５は、レーダー波ＲＷの直線偏波がＴＭ波となる向きで、且つＴＭ波をブリュースター角θBで電波吸収面５１ａへ入射するように傾けて配置することで、ＴＭ波の吸収性を備える電波吸収板５１によってレーダー波ＲＷがほぼ吸収される。これにより、被検知体３に当たらなかったレーダー波ＲＷの反射波が不要電波となってレーダー装置２に検知されてしまうことを抑制できる。【選択図】図１
UNNECESSARY RADIO WAVE SUPPRESSION METHOD AND ANECHOIC CHAMBER
不要電波抑制方法および電波暗室
FUJII KATSUMI (author)
2020-01-16
Patent
Electronic Resource
Japanese
Sound absorption assembly for anechoic chamber and anechoic chamber
| European Patent Office | 2021