JP2013529283A - 損失プロファイル解析 - Google Patents
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Abstract
Description
によって与えられる。別の例として、エネルギ印加区域がa×a×aの寸法を有する立方体の場合、最大共振波長は、√2aによって与えられる。さらに別の例では、エネルギ印加区域が(例えば図2に示すように)半径a、長さdの円筒の場合、最大共振波長は、2a>dが成立する場合
によって与えられ、2a<dが成立する場合は
によって与えられる。別の例では、エネルギ印加区域が半径aの球体の場合、最大共振波長は、
によって与えられる。上記の例は、形状にかかわらず、各エネルギ印加区域が少なくとも1つの共振寸法を有し得ることを単に例示することを意図する。
として表すことができる。別の例として、a×a×aの寸法を有する立方体空洞では、モーダル条件は、
として表すことができる。別の例として、半径aの球体空洞では、モーダル条件は、
として表すことができる。本明細書では、空洞に供給される電磁エネルギに関して、その寸法が「モーダル条件」を満たす空洞を「モーダル空洞」と呼ぶ。
[I11,I21,I31,...,INd1;
I12,I22,I32,...,INd2;
...
I1Nm,I2Nm,I3Nm,...,INdNm]
ε’’=εd’’+εσ’’=εd’’+σ’/(ωε0)
によって特徴付けることができる総損失ε’’の場合があり、ただしσ’は導電率であり、ωは印加EM波の角周波数であり、ε0は自由空間または真空の誘電率である。以下、総損失ε’’(本明細書では「損失パラメータ」とも呼ぶ)を「σ」によって示す場合がある。ただし本明細書で使用するとき、「損失」という用語は、あらゆる種類の吸収率を包含するよう広く使用する。例として、電磁エネルギを吸収する対象物がエネルギ印加区域内に位置する場合、損失は、その対象物の電磁エネルギ吸収能力に相当することができる。
tan(δ)=ε’’/ε’=[εd’’+σ’/(ωε0)]/ε’
のように定めることができる「損失係数」とすることができ、ただしεは誘電率である。損失が小さい誘電体では、tan(δ)<<1であり、よってtan(δ)をδで近似することができる。これにより、1つまたは複数の方程式を解くのを容易にすることができる。
1/2σI=P 方程式(1)
を構築するように構成することができ、ただしPは散逸される出力量のベクトルであり、Iはフィールドパターン強度の行列であり、σは、未知の損失値のベクトルとして表す損失プロファイルである。
σ=2PI−1
1/2(σ1I1j+σ2I2j+...+σNdINdj)=Pj
のように局所的強度Iijに関係することができるので、測定される出力損失P、行列I、および未知の損失プロファイルσは、測定される出力損失Pおよび既知の強度Iijから構築される、以下の方程式を満たすことができる。
1/2σI=P 方程式(2)
Claims (39)
- 少なくとも1つの放射素子により、エネルギ印加区域内の対象物に電磁エネルギを加えるための装置において、
前記エネルギ印加区域内の前記対象物に複数の電磁場パターンで電磁エネルギを加えさせ、
前記複数のフィールドパターンのそれぞれについて、前記エネルギ印加区域内で散逸される出力量を求め、
前記複数のフィールドパターンを前記エネルギ印加区域に適用する場合に散逸される前記出力量に基づいて、前記エネルギ印加区域の少なくとも一部にわたるエネルギ吸収特性の空間的分布を求める
ように構成される少なくとも1個のプロセッサ
を含むことを特徴とする装置。 - 請求項1に記載の装置において、前記プロセッサが、前記対象物の少なくとも一部にわたるエネルギ吸収特性の空間的分布を求めるようにさらに構成されることを特徴とする装置。
- 請求項1または請求項2に記載の装置において、前記電磁エネルギが無線周波数(RF)範囲内にあることを特徴とする装置。
- 請求項1乃至3の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記複数のフィールドパターンのそれぞれに関連する電磁場強度、および前記複数のフィールドパターンのそれぞれにおいて前記エネルギ印加区域内で散逸される出力に基づき、前記エネルギ吸収特性の空間的分布を計算するように構成されることを特徴とする装置。
- 請求項1乃至4の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記エネルギ吸収特性の空間的分布に基づいて前記対象物の位置を求めるように構成されることを特徴とする装置。
- 請求項1乃至5の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記複数のフィールドパターンのそれぞれを励起することに由来する、既知の高強度フィールドエリアの位置に基づいて前記対象物の位置を求めるように構成されることを特徴とする装置。
- 請求項1乃至6の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記エネルギ吸収特性の空間的分布を繰り返し求めるように構成されることを特徴とする装置。
- 請求項7に記載の装置において、エネルギ吸収特性の空間的分布を2回求める間の時間差が、エネルギ吸収特性の空間的分布の他の2回の特定間の差の大きさの関数であることを特徴とする装置。
- 請求項8に記載の装置において、エネルギ吸収特性の空間的分布を2回求める間の時間差が、前記対象物の特徴の関数であることを特徴とする装置。
- 請求項1乃至9の何れか1項に記載の装置において、前記複数のフィールドパターンのそれぞれについて、前記プロセッサが、前記対象物内で散逸される出力と他の場所で散逸される出力とを区別するように構成されることを特徴とする装置。
- 請求項10に記載の装置において、前記プロセッサが、エネルギ印加区域の構造に関連する損失値を使用して区別を行うように構成されることを特徴とする装置。
- 請求項1乃至11の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記エネルギ吸収特性の空間的分布に基づいて、前記エネルギ印加区域の異なる部分に異なるエネルギ量を加えさせるようにさらに構成されることを特徴とする装置。
- 請求項1乃至12の何れか1項に記載の装置において、同様のエネルギ吸収特性の領域に同様のエネルギ量が加えられ、異なるエネルギ吸収特性の領域に異なるエネルギ量が加えられるよう、前記少なくとも1個のプロセッサが、前記エネルギ印加区域の異なる部分に異なるエネルギ量を加えさせるようにさらに構成されることを特徴とする装置。
- 請求項1乃至13の何れか1項に記載の装置において、異なるエネルギ吸収特性の領域により同様のエネルギ量が吸収されるよう、前記少なくとも1個のプロセッサが、前記エネルギ印加区域の異なる部分に異なるエネルギ量を加えさせるようにさらに構成されることを特徴とする装置。
- 請求項1乃至14の何れか1項に記載の装置において、前記エネルギ印加区域内でエネルギ吸収の所定の空間的分布が得られるよう、前記少なくとも1個のプロセッサが、前記エネルギ印加区域の異なる部分に異なるエネルギ量を加えさせるようにさらに構成されることを特徴とする装置。
- 請求項1乃至15の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記対象物内の異なる領域において、制御されたエネルギ量を吸収させるようにさらに構成されることを特徴とする装置。
- 請求項1乃至16の何れか1項に記載の装置において、前記プロセッサが、前記エネルギ印加区域の所定の部分内で散逸される出力量だけを求めるように構成されることを特徴とする装置。
- 請求項17に記載の装置において、前記所定の部分には、前記エネルギ印加区域内の前記対象物の1つまたは複数の部分が含まれることを特徴とする装置。
- 請求項1乃至18の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記エネルギ吸収特性の空間的分布をルックアップテーブルとして記憶させるようにさらに構成されることを特徴とする装置。
- 請求項19に記載の装置において、前記ルックアップテーブルが、前記エネルギ印加区域の領域とその対応する吸収率との間の関係を表すことを特徴とする装置。
- 請求項1乃至20の何れか1項に記載の装置において、前記少なくとも1個のプロセッサが、前記エネルギ印加区域の少なくとも一部における前記エネルギ吸収特性の空間的分布の表示を、イメージとしてもたらすようにさらに構成されることを特徴とする装置。
- 請求項1乃至21の何れか1項に記載の装置において、電磁エネルギ源をさらに含み、前記供給源が、位相変調器、周波数変調器、および振幅変調器のうちの少なくとも1つを含むことを特徴とする装置。
- 請求項1乃至22の何れか1項に記載の装置において、前記エネルギ印加区域に電磁エネルギを加えるように構成される、少なくとも1つの放射素子をさらに含むことを特徴とする装置。
- 請求項1乃至23の何れか1項に記載の装置において、電磁エネルギ源をさらに含み、前記供給源が、前記エネルギ印加区域に電磁エネルギを加えるように構成される少なくとも1つの放射素子を含むことを特徴とする装置。
- 請求項1乃至24の何れか1項に記載の装置において、前記エネルギ印加区域が共振空洞であることを特徴とする装置。
- 請求項1乃至25の何れか1項に記載の装置において、前記エネルギ印加区域がモーダル空洞であることを特徴とする装置。
- 対象物に電磁エネルギを加えるための装置において、
電磁エネルギ源と、
エネルギ印加区域と、
前記エネルギ印加区域内の前記対象物に複数の電磁場パターンで電磁エネルギを加えさせ、
前記複数のフィールドパターンのそれぞれについて、前記エネルギ印加区域内で散逸される出力量を求め、
前記複数のフィールドパターンを前記エネルギ印加区域に適用する場合に散逸される前記出力量に基づいて、前記対象物の少なくとも一部にわたるエネルギ吸収特性の空間的分布を求める
ように構成される少なくとも1個のプロセッサと、
を含むことを特徴とする装置。 - 対象物に電磁エネルギを加えるための方法において、
エネルギ印加区域内の前記対象物に対して、複数の電磁場パターンを電磁エネルギ源に加えさせるステップと、
前記複数のフィールドパターンのそれぞれについて、前記エネルギ印加区域内で散逸される出力量を求めるステップと、
前記複数のフィールドパターンにおいて散逸される前記出力量に基づいて、前記対象物の少なくとも一部にわたるエネルギ吸収特性の空間的分布を求めるステップと、
を含むことを特徴とする方法。 - 請求項28に記載の方法において、前記エネルギ吸収特性の空間的分布が、前記複数のフィールドパターンのそれぞれに関連する電磁場強度分布、および前記複数のフィールドパターンのそれぞれにおいて前記エネルギ印加区域内で散逸される出力に基づいて求められることを特徴とする方法。
- 請求項28または29に記載の方法において、前記エネルギ吸収特性の空間的分布に基づいて前記対象物の位置を求めるステップをさらに含むことを特徴とする方法。
- 請求項28乃至30の何れか1項に記載の方法において、前記エネルギ吸収特性の空間的分布を繰り返し求めるステップをさらに含むことを特徴とする方法。
- 請求項31に記載の方法において、エネルギ吸収特性の繰り返し空間的分布を2回求める間の時間差が、2回求めたエネルギ吸収特性の空間的分布間の差の大きさの関数であることを特徴とする方法。
- 請求項31に記載の方法において、エネルギ吸収特性の空間的分布を2回求める間の時間差が、前記対象物の特徴の関数であることを特徴とする方法。
- 請求項28乃至33の何れか1項に記載の方法において、前記エネルギ吸収特性の空間的分布に基づいて、前記エネルギ印加区域の異なる部分に異なるエネルギ量を加えさせるステップをさらに含むことを特徴とする方法。
- 請求項28乃至34の何れか1項に記載の方法において、前記対象物内の異なる領域において、制御されたエネルギ量を吸収させるステップをさらに含むことを特徴とする方法。
- 請求項28乃至35の何れか1項に記載の方法において、前記エネルギ吸収特性の空間的分布をルックアップテーブルとして記憶するステップをさらに含むことを特徴とする方法。
- 請求項28乃至36の何れか1項に記載の方法において、前記エネルギ印加区域の少なくとも一部における前記エネルギ吸収特性の空間的分布を、イメージとして表示するステップをさらに含むことを特徴とする方法。
- 請求項1乃至27の何れか1項に記載の装置において、前記プロセッサが、前記供給源を調整して、0.5秒から5秒の間の間隔で前記エネルギ印加区域にエネルギを繰り返し加えるようにさらに構成されることを特徴とする装置。
- 少なくとも1つの放射素子により、エネルギ印加区域に、無線周波数範囲内の電磁エネルギ(RFエネルギ)を加えるための装置において、
互いに異なる少なくとも2つの電磁場パターンが前記エネルギ印加区域に加えられるよう、RFエネルギの分布を制御し、
前記電磁場パターンのそれぞれについて、前記エネルギ印加区域内で散逸される出力量を求め、
前記フィールドパターンのそれぞれについて求めた前記出力量に基づいて、前記エネルギ印加区域の少なくとも一部にわたるエネルギ吸収特性の空間的分布を求める
ように構成される少なくとも1個のプロセッサ
を含むことを特徴とする装置。
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