JP2006166399A - Emc試験用アンテナ装置、試験信号発生装置及び送信装置 - Google Patents
Emc試験用アンテナ装置、試験信号発生装置及び送信装置 Download PDFInfo
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Abstract
【解決手段】 送信装置は、ホーンアンテナ20と、その放射方向等を補正する誘電体レンズ30とを備える。誘電体レンズ30は、レンズ部32と、鍔部34と、突起部36とから構成され、鍔部34をホーンアンテナ20の開口端に当接し、突起部36をホーンアンテナ20に溶接されたL字金具22にビス止めすることにより、ホーンアンテナ20の開口端に直接固定される。この結果、ホーンアンテナ20からの送信電波は、誘電体レンズ30に損失なく入射し、しかも、誘電体レンズ30を通過することなく試験対象物側に放射されることはない。従って、ホーンアンテナ20のゲインや誘電体レンズ30の形状を大きくする必要がなく、送信装置を低コストで実現できる。
【選択図】 図2
Description
また次に、上記のように試験信号発生装置にアイソレータ若しくはサーキュレータからなる方向性伝送手段を設けた場合、この方向性伝送手段にて、EMC試験用アンテナ装置から入力された反射波の受信信号を減衰させることはできるものの、例えば、全反射等によって反射波が高レベルとなり、EMC試験用アンテナ装置から入力される受信信号の信号レベルも高レベルになると、その受信信号を方向性伝送手段にて充分減衰させることができず、増幅器に高レベルの受信信号が入力されて増幅器が故障してしまうことも考えられる。
図1は、本発明が適用された実施形態の送信装置全体の構成を表す構成図である。
図1に示すように、本実施形態の送信装置は、妨害波による試験対象物5の耐性を測定するイミュニティ試験を行うために、試験対象物5に向けて試験用の妨害波(試験用電波)を送信するものであり、試験用電波となる試験信号を発生する試験信号発生装置10と、この試験信号発生装置10から出力される試験信号を受けて試験用電波を放射するホーンアンテナ20と、このホーンアンテナ20の開口端に固定され、ホーンアンテナ20からの試験用電波の放射特性を補正する誘電体レンズ30と、から構成されている。
例えば、上記実施形態では、誘電体レンズ30は一つの部材からなるものとして説明したが、誘電体レンズには、ホーンアンテナ20からの放射電波が入射される表面からレンズ内に入射した放射電波を出射させる裏面にかけて複数に分割したものを使用してもよい。
Claims (17)
- 試験対象物のEMC試験を行うのに用いられるアンテナ装置であって、
前記試験対象物に向けて試験用電波を放射するホーンアンテナと、
該ホーンアンテナからの試験用電波の放射特性を補正する放射特性補正レンズと、
を備え、該放射特性補正レンズを前記ホーンアンテナの開口端に配置してなることを特徴とするEMC試験用アンテナ装置。 - 前記放射特性補正レンズは、メタルプレートレンズからなることを特徴とする請求項1に記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、誘電体レンズからなることを特徴とする請求項1に記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、凸レンズであることを特徴とする請求項3に記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、凹レンズであることを特徴とする請求項3に記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、フレネルレンズであることを特徴とする請求項3に記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、当該レンズの表面から裏面にかけて複数に分割されており、該分割された複数の誘電体レンズ部材を接合した状態で前記ホーンアンテナの開口端に配置されていることを特徴とする請求項3〜請求項6の何れかに記載のEMC試験用アンテナ装置。
- 前記放射特性補正レンズは、レンズ面周囲の外周部に設けられた鍔部を有し、該鍔部が前記ホーンアンテナの開口端に当接されることにより、前記ホーンアンテナの開口端に位置決めされていることを特徴とする請求項3〜請求項7の何れかに記載のEMC試験用アンテナ装置。
- 前記鍔部には、前記ホーンアンテナの開口端周囲を囲むように複数の突起部が設けられていることを特徴とする請求項8に記載のEMC試験用アンテナ装置。
- 前記ホーンアンテナの外周面には、前記放射特性補正レンズの鍔部に設けられた複数の突起部を当該ホーンアンテナに接合するための複数の接合用金具が設けられていることを特徴とする請求項9に記載のEMC試験用アンテナ装置。
- 試験用電波を透過可能な材料にて構成され、前記放射特性補正レンズの表面及び裏面にそれぞれ当接されて前記放射特性補正レンズを挟持する一対の挟持部材を備え、
前記放射特性補正レンズは、
前記一対の挟持部材の一方を前記ホーンアンテナの内部に収納し、他方の挟持部材を、当該放射特性補正レンズを挟んで前記ホーンアンテナの外側に配置し、更に、該他方の挟持部材を固定部材を介して前記ホーンアンテナに固定することにより、前記ホーンアンテナの開口端に配置されていることを特徴とする請求項1〜請求項6の何れかに記載のEMC試験用アンテナ装置。 - 前記一対の挟持部材は、ウレタンにて構成されていることを特徴とする請求項11に記載のEMC試験用アンテナ装置。
- 前記ホーンアンテナ及び前記放射特性補正レンズを、それぞれ、前記ホーンアンテナの開口端と前記放射特性補正レンズのレンズ面とを接離可能に支持する支持部材を備え、
前記放射特性補正レンズは、該支持部材を介して、前記ホーンアンテナの開口端に配置されていることを特徴とする請求項1〜請求項6の何れかに記載のEMC試験用アンテナ装置。 - 前記支持部材は、スライドレールと、該スライドレール上に移動可能に設けられ、前記ホーンアンテナ及び前記放射特性補正レンズを各々支持する支持台と、からなることを特徴とする請求項7に記載のEMC試験用アンテナ装置。
- 妨害波による試験対象物の耐性を測定するイミュニティ試験用の試験信号を発生して、請求項1〜請求項14の何れかに記載のEMC試験用アンテナ装置に出力することにより、該EMC試験用アンテナ装置から前記試験対象物に向けて前記妨害波を放射させる試験信号発生装置であって、
前記試験信号を発生する信号発生器と、
該信号発生器から出力された試験信号を増幅する増幅器と、
該増幅器にて増幅された試験信号を前記EMC試験用アンテナ装置が接続される出力端子まで伝送すると共に、該出力端子に外部から入力された高周波信号が前記増幅器に戻るのを阻止する方向性伝送手段と、
を備えたことを特徴とする試験信号発生装置。 - 前記増幅器及び方向性伝送手段を複数対備えると共に、
前記信号発生器から出力された試験信号を複数に分配して前記各増幅器に出力する分配器と、
前記各増幅器にて増幅され、各増幅器に対応する各方向性伝送手段から出力される複数の試験信号を合成して、前記出力端子に出力する合成器と、
を備えたことを特徴とする請求項17に記載の試験信号発生装置。 - 妨害波による試験対象物の耐性を測定するイミュニティ試験を行うために、前記試験対象物に向けて試験用の妨害波を送信する送信装置であって、
請求項1〜請求項14の何れかに記載のEMC試験用アンテナ装置と、
請求項15又は請求項16に記載の試験信号発生装置と、
を備えたことを特徴とする送信装置。
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