JP5595630B2 - プログラム可能なマイクロ波アレイ及びその設定方法 - Google Patents
プログラム可能なマイクロ波アレイ及びその設定方法 Download PDFInfo
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- JP5595630B2 JP5595630B2 JP2006075788A JP2006075788A JP5595630B2 JP 5595630 B2 JP5595630 B2 JP 5595630B2 JP 2006075788 A JP2006075788 A JP 2006075788A JP 2006075788 A JP2006075788 A JP 2006075788A JP 5595630 B2 JP5595630 B2 JP 5595630B2
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- 238000000034 method Methods 0.000 title claims description 12
- 230000010363 phase shift Effects 0.000 claims description 105
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
- H01Q3/46—Active lenses or reflecting arrays
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
- Aerials With Secondary Devices (AREA)
Description
50 アレイ
60 マイクロ波源
80 アンテナ要素
90 反射ビーム
155 ターゲット
400 マイクロ波照射
410 マイクロ波放射のビーム
500 理想的な位相
600 位相シフト
700 マイクロ波受信機
Claims (8)
- ターゲットのマイクロ波画像を取得するマイクロ波画像生成システムにおいて使用するアレイであって、
複数のアンテナ要素のそれぞれからのマイクロ波放射が前記ターゲットに同相で到達するように、それぞれが前記ターゲットに向かって前記マイクロ波放射のビームを導く個別の位相シフトによってプログラム可能な前記複数のアンテナ要素を有し、
前記マイクロ画像生成システムの信号対雑音比を向上するために、前記マイクロ波放射のビームが前記ターゲットに同相の状態で到達しているときの前記複数のアンテナ要素における前記個別の位相シフトを維持する一方、前記複数のアンテナ要素からの前記ビームの振幅を極大化するための理想的の位相と該個別の位相シフトとを比較し、該理想的な位相からのオフセットを有する前記アンテナ要素について当該オフセットの分だけ当該位相シフトを変更するものである、アレイ。 - 前記複数のアンテナ要素のそれぞれは、反射アンテナ要素であり、前記反射アンテナ要素のそれぞれは、マイクロ波源からマイクロ波照射を受信し、前記個別のプログラムされている位相シフトに基づいて、前記マイクロ波照射を反射して前記マイクロ波放射のビームを前記ターゲットに向かって導くように構成されており、前記反射アンテナ要素のそれぞれは、前記ターゲットから反射されたマイクロ波放射の反射ビームを受信し、前記反射アンテナ要素のそれぞれに関連付けられている前記個別にプログラムされている位相シフトに基づいて、前記反射ビームをマイクロ波受信機に向かって反射するように構成されている、請求項1記載のアレイ。
- 前記信号対雑音比は、前記ターゲットにおけるアンテナ要素からの前記マイクロ波放射の建設的な干渉と前記マイクロ波受信機におけるアンテナ要素からの迷光マイクロ波放射の破壊的な干渉との比率であり、前記信号対雑音比は、前記ターゲットにおける前記建設的な干渉の相応した減少を伴うことなしに、前記マイクロ波受信機における前記迷光マイクロ波放射の前記破壊的な干渉を増大させることによって最適化される、請求項2記載のアレイ。
- 前記信号対雑音比は、サイドローブ面積に対するメインローブ面積の比率である、請求項1記載のアレイ。
- 前記ターゲットに前記マイクロ波放射のビームを導くべく前記複数のアンテナ要素のそれぞれごとにプログラムされている前記位相シフトは、所定のエントロピーを有するパターンを形成しており、該エントロピーを減少させることにより前記パターンを表すビットのデジタル圧縮を実現するものである、請求項1記載のアレイ。
- ターゲットのマイクロ波画像を取得するマイクロ波画像生成システムの動作を最適化する方法であって、
複数のプログラム可能なマイクロ波アンテナ要素を含むアレイを提供するステップと、
マイクロ波放射のビームを前記ターゲットに向かって同相で到達するように導くべく前記マイクロ波アンテナ要素のそれぞれごとに個別の位相シフトのパターンを設計するステップと、
前記マイクロ波画像生成システムの信号対雑音比を向上するために、前記マイクロ波放射のビームが前記ターゲットに同相の状態で到達しているときの前記複数のアンテナ要素における前記個別の位相シフトを維持する一方、前記複数のアンテナ要素からの前記ビームの振幅を極大化するための理想的の位相と該個別の位相シフトとを比較し、該理想的な位相からのオフセットを有する前記アンテナ要素について当該オフセットの分だけ当該位相シフトを変更するステップと、
を含む方法。 - 前記信号対雑音比は、前記ターゲットにおけるアンテナ要素からの前記マイクロ波放射の建設的な干渉とマイクロ波受信機におけるアンテナ要素からの迷光マイクロ波放射の破壊的な干渉との比率であり、前記変更するステップは、前記ターゲットにおける前記建設的な干渉の相応した減少を伴うことなしに、前記マイクロ波受信機における前記迷光マイクロ波放射の前記破壊的な干渉を増大させるステップを更に含む、請求項6記載の方法。
- 前記ターゲットに前記マイクロ波放射のビームを導くべく前記複数のアンテナ要素のそれぞれごとにプログラムされている前記位相シフトは、所定のエントロピーを有するパターンを形成しており、該エントロピーを減少させることにより前記パターンを表すビットのデジタル圧縮を実現するステップを更に含む、請求項6記載の方法。
Applications Claiming Priority (2)
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US11/089,298 | 2005-03-24 | ||
US11/089,298 US8289199B2 (en) | 2005-03-24 | 2005-03-24 | System and method for pattern design in microwave programmable arrays |
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JP2006267103A JP2006267103A (ja) | 2006-10-05 |
JP5595630B2 true JP5595630B2 (ja) | 2014-09-24 |
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Country Status (4)
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US (1) | US8289199B2 (ja) |
JP (1) | JP5595630B2 (ja) |
DE (1) | DE102005062905B4 (ja) |
GB (1) | GB2424529B (ja) |
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DE102005062905A1 (de) | 2006-09-28 |
GB0523932D0 (en) | 2006-01-04 |
GB2424529B (en) | 2008-02-20 |
US20060214836A1 (en) | 2006-09-28 |
GB2424529A (en) | 2006-09-27 |
US8289199B2 (en) | 2012-10-16 |
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JP2006267103A (ja) | 2006-10-05 |
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