JP5671551B2 - スマートアンテナ - Google Patents
スマートアンテナ Download PDFInfo
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- JP5671551B2 JP5671551B2 JP2012538417A JP2012538417A JP5671551B2 JP 5671551 B2 JP5671551 B2 JP 5671551B2 JP 2012538417 A JP2012538417 A JP 2012538417A JP 2012538417 A JP2012538417 A JP 2012538417A JP 5671551 B2 JP5671551 B2 JP 5671551B2
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- Prior art keywords
- antenna device
- monopole
- antenna
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- 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
- H01Q3/446—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 the radiating element being at the centre of one or more rings of auxiliary elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
- H01Q19/32—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being end-fed and elongated
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Description
本発明の一態様によれば,請求項1で規定されるアンテナ装置が提供される。
まず初めに,ESPARアンテナの好ましい実施形態が,CST Microwave Studioでシミュレーションされた。その入力インピーダンス整合は,6つの主要パターンと6つの副主要パターンに対して最適化される。主要パターンは,25Vの制御電圧で作動する1つの可変容量ダイオード(varactor)と,1.4Vの制御電圧で作動する他の5つの可変容量ダイオード(varactors)として定義される。6つの寄生エレメント20,24の位置は,30°,90°,150°,210°,270°と330°で定義される。それら6つの主要パターンの方向は,相応して,30°,90°,150°,210°,270°と330°である。
90°に位置する主要パターンの1つは,図3に示される。点線32は,Matlabで数値モデルに基づいた相互インピーダンスと自己インピーダンスから計算される放射パターンである。線34は,CST Microwave Studioでシミュレートされた実現利得を示し,そして,線36は,測定室で測定されたアンテナ利得を示す。
120°に位置する副主要パターンの1つは,図4に示される。点線38は,Matlabで数値モデルに基づく相互インピーダンスと自己インピーダンスから計算される放射パターンである。線40は,CST Microwave Studioでシミュレートされた実現利得を示し,そして,線42は,測定室で実際に測定されたアンテナ利得を示す。
前後比を増加するために,バックローブキャンセル計算が,Matlabでプログラムされる数値モデルを用いて実行されてきている。同様に,バックローブキャンセル方法が,研究されていきている。
適応ビームステアリング法は,ESPARアンテナが望ましい信号の方向を推定し,望ましい信号の方へメインローブを形成し,自動的に電波障害の方向で消失を形成することを可能にする。好ましい実施形態において,ESPARアンテナに適用される適応アルゴリズムは,非盲検アルゴリズム(un−blinded algorithm)であり,それについて,適応アルゴリズムを実行するための基準信号が与えられる。記述の効率化と簡略化のために,見通し内伝搬(line of sight propagation)状況だけが記述され,多経路成分は記述されないが,当業者には明らかであろう。
[20V 12V 10V 1.4V 1.4V 5V]
ここで開示されるアンテナ装置10についての回路は,上記の技術を考慮すれば,当業者には明らかであるに違いない。しかし,完全性のために,図8および9に示す。
WiMAXは,今日,スマートアンテナ技術にとって最強の推進力の1つである。さらにまた,3Gと比較してWiMAXスペクトルの低コストは,WiMAXを有する無線サービスの分野に参入するサービスプロバイダにとって明らかな推進力である。コスト/Hzにおけるこの違いは,特にヨーロッパで著しく,そこでの平均3Gスペクトルのコスト/Hzは,平均的なWiMAXスペクトルのコスト/Hzより353倍高い。
スマートアンテナ技術は,範囲の拡張とキャパシティ利得を約束し,それ故に,無線LANホットスポットアプリケーションでのスマートアンテナの採用の推進を約束し得る。さらにまた,MIMOは無線LAN範囲拡張アプリケーションにおいて広まるであろう。
通信マーケットにおいて,スマートアンテナは,CDMA混信除去と3G送受器と通信基地局/塔へのキャパシティの拡張を提供する。
ESPARスマートアンテナは,広帯域特性を持つように改善され,それ故,携帯用の地上デジタルビデオ放送(DVB−T)受信器としての適用に適当である。
携帯性が携帯型無線通信端末にとって鍵となる必要条件であるので,アンテナの寸法は重要になるであろう。
ESPARアンテナは,RFIDタグ読取りシステムの領域において,読取り速度,衝突軽減,品目の位置探査とRFIDシステムのキャパシティの改善に,非常に寄与することができるであろう。
本ESPARデザインは,直線偏波を有する。現行のデザインの円偏光な小さなスマートアンテナへの拡張/修正は,衛星通信と衛星間通信に対して,ビーム操縦と空間配備の適用において非常に役立つ。
Claims (17)
- 駆動モノポールエレメントと,
前記駆動モノポールエレメントのまわりに環状配列で配置される寄生モノポールエレメントの配列と,を含む
アンテナ装置であって,
前記寄生モノポールエレメントは,曲がっている,もしくは,湾曲している立体形状であり,
前記駆動モノポールエレメントは,調節された波長の実質的に1/8の高さ又は1/8以下の高さを有し,
前記寄生モノポールエレメントは,調節された波長の実質的に1/4の長さを有し,
前記寄生モノポールエレメントは,前記駆動モノポールエレメントの高さに相当する最大の高さを有するように,曲がっている,もしくは,湾曲している,
アンテナ装置。 - 前記寄生モノポールエレメントが,前記駆動モノポールエレメントに向かって曲がっている,もしくは,湾曲している,
請求項1に記載のアンテナ装置。 - 各々の前記寄生モノポールエレメントが,前記駆動モノポールエレメントと平行である,もしくは,実質的に平行な部分を有する,
請求項1又は2に記載のアンテナ装置。 - 前記駆動モノポールエレメントが,先端にディスクを備えている,
請求項1から請求項3のいずれか1項に記載のアンテナ装置。 - 前記寄生モノポールエレメントが6つ備えられている,
請求項1から請求項4のいずれか1項に記載のアンテナ装置。 - 前記寄生モノポールエレメントが,規則的な角度間隔によって相互に間隔を置いて配置される,
請求項1から請求項5のいずれか1項に記載のアンテナ装置。 - 前記アンテナ装置は,接地スリーブを含み,前記接地スリーブの上に前記モノポールエレメントを備えている,
請求項1から請求項6のいずれか1項に記載のアンテナ装置。 - 前記接地スリーブが,前記接地スリーブの両端で第1及び第2の接地板を含み,前記第1及び第2の接地板の各々が,前記駆動モノポールエレメント及び前記寄生モノポールエレメントのセットを含む,
請求項7に記載のアンテナ装置。 - 前記駆動モノポールエレメント及び前記寄生モノポールエレメントのセットが,類似したビームを発生することができる,
請求項8に記載のアンテナ装置。 - 前記接地スリーブが,実質的に波長の1/4の深さと,実質的に前記波長の3/16の半径を有し,前記波長は前記アンテナ装置が調節される波長である,
請求項7から請求項9のいずれか1項に記載のアンテナ装置。 - 誘電天板が,前記駆動モノポールエレメント及び前記寄生モノポールエレメントの端と接触して配置される,
請求項1から請求項10のいずれか1項に記載のアンテナ装置。 - 前記アンテナ装置が,コンパクトな電子走査導波器アレイ(ESPAR)アンテナを提供する,
請求項1に記載のアンテナ装置。 - 前記アンテナ装置が,2.4GHzから2.5GHzまでの周波数帯をカバーする,
請求項12に記載のアンテナ装置。 - 前記アンテナ装置は,第1及び第2のモノポールエレメントのセットが,異なるアンテナ機能を提供するよう作動し得る二重アンテナ構造を備える,
請求項8に記載のアンテナ装置。 - 第1のモノポールエレメントのセットが,通信基地局の方向に第1のビームを進めるよう作動でき,その間に,第2のモノポールエレメントのセットが,他のユーザーの方向に第2のビームを進めるよう作動できる,
請求項14に記載のアンテナ装置。 - 望ましい信号の方向を推定し,望ましい信号の方へメインローブを形成し,そして,電波障害の方向で消失を自動的に形成するために,請求項1から請求項15のいずれか1項に記載のアンテナ装置の適応ビーム操縦を提供するステップを含む,
アンテナ装置を作動する方法。 - 請求項1から請求項15のいずれか1項に記載のアンテナ装置を含む通信システム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0919948A GB0919948D0 (en) | 2009-11-13 | 2009-11-13 | Smart antenna |
GB0919948.0 | 2009-11-13 | ||
PCT/GB2010/051900 WO2011058378A1 (en) | 2009-11-13 | 2010-11-15 | Smart antenna |
Publications (3)
Publication Number | Publication Date |
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JP2013511186A JP2013511186A (ja) | 2013-03-28 |
JP2013511186A5 JP2013511186A5 (ja) | 2013-12-05 |
JP5671551B2 true JP5671551B2 (ja) | 2015-02-18 |
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Application Number | Title | Priority Date | Filing Date |
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JP2012538417A Expired - Fee Related JP5671551B2 (ja) | 2009-11-13 | 2010-11-15 | スマートアンテナ |
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US (1) | US8922447B2 (ja) |
EP (1) | EP2499702B1 (ja) |
JP (1) | JP5671551B2 (ja) |
GB (1) | GB0919948D0 (ja) |
WO (1) | WO2011058378A1 (ja) |
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FR2666178A1 (fr) * | 1990-08-21 | 1992-02-28 | Etudes Realis Protect Electron | Dispositif formant antenne emettrice ou receptrice d'ondes de haute frequence. |
JP4463368B2 (ja) * | 1999-03-02 | 2010-05-19 | パナソニック株式会社 | モノポールアンテナ |
JP3672856B2 (ja) * | 2001-09-07 | 2005-07-20 | 株式会社国際電気通信基礎技術研究所 | アレーアンテナの制御方法 |
JP3762283B2 (ja) * | 2001-11-07 | 2006-04-05 | 株式会社国際電気通信基礎技術研究所 | アレーアンテナの制御方法 |
US6987493B2 (en) * | 2002-04-15 | 2006-01-17 | Paratek Microwave, Inc. | Electronically steerable passive array antenna |
US6972729B2 (en) | 2003-06-20 | 2005-12-06 | Wang Electro-Opto Corporation | Broadband/multi-band circular array antenna |
US7385563B2 (en) * | 2006-09-11 | 2008-06-10 | Tyco Electronics Corporation | Multiple antenna array with high isolation |
JP2008278219A (ja) * | 2007-04-27 | 2008-11-13 | Toshiba Corp | アンテナ装置 |
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JP2013511186A (ja) | 2013-03-28 |
WO2011058378A1 (en) | 2011-05-19 |
EP2499702B1 (en) | 2014-08-06 |
GB0919948D0 (en) | 2009-12-30 |
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