JP7307146B2 - 4つの共面アンテナ素子を有する、無線送電のための近接場アンテナ - Google Patents
4つの共面アンテナ素子を有する、無線送電のための近接場アンテナ Download PDFInfo
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Description
[0001] 本明細書における実施形態は、概して、近接場無線送電システム(例えば、このようなシステムにおいて使用されるアンテナ、ソフトウェア及び装置)に関し、より具体的には、それぞれの蛇行パターンにそれぞれ従う4つの共面アンテナ素子を有する、無線送電のための近接場アンテナに関する。
[0002] 従来の充電パッドは、装置を充電するために使用される磁場を生成するために誘導コイルを利用する。ユーザは、通常、充電パッド上の特定の位置に装置を置かなければならず、したがって装置の充電を遮断又は終了することなく装置をパッド上の様々な位置に移動することができない。多くのユーザは、自らの装置の充電を開始するためのパッド上の正確な位置に装置を配置することができない可能性があるため、これは、多くのユーザにとって苛立たしい体験になる。多くの場合、ユーザは、ユーザの装置が正しく配置されたと考え得るが、次に数時間後、ごく僅かな(又は零の)エネルギーが転送されたことが分かって失望することがある。
[0004] したがって、上で同定された問題に対処する無線充電システム(例えば、RF充電パッド)の必要性がある。この目的を達成するために、単一集積回路上に効率的に配置される部品を含むRF充電パッドについてここで説明する。ここで、単一集積回路は、RF充電パッドの表面上に位置する受信装置への無線電力の送信に使用するための効率的アンテナ区域を見つけ出すために、アンテナ区域(例えば、グループにまとめられるRF充電パッドの1つ又は複数のアンテナ又はユニットセルアンテナ:本明細書ではアンテナグループとも呼ぶ)を選択的又は連続的に活性化することにより、RF充電パッドのアンテナを管理する。このようなシステム及びその使用方法は、従来の充電パッドに伴うユーザ不満足を解消することを促進する。例えば、アンテナ区域を選択的に活性化する一方で転送されたエネルギーを監視することにより、このようなシステム及びその使用方法は、装置がRF充電パッド上に置かれ得る任意の時点及び任意の位置においてエネルギー転送が最大化されることを保証することにより、浪費されるRF送電をなくすことを促進し、したがって効率的に受信されない可能性がある無駄な送信をなくす。
[0086] 本開示がより詳細に理解され得るように、そのいくつかが添付図面に示される様々な実施形態の特徴を参照してより具体的な説明がなされ得る。しかし、添付図面は、本開示の適切な特徴を単に示しており、したがって制限するものと見なされてはならず、本明細書は他の効果的な特徴を認め得る。
[00129] その例が添付図面に示される実施形態を次に詳細に参照する。以下の詳細な説明では、様々な説明される実施形態を十分に理解するために多くの具体的詳細が記載される。しかし、様々な説明される実施形態がこれらの特定の詳細無しに実行され得ることは当業者により明らかになる。他の例では、周知の方法、手順、部品、回路及びネットワークは実施形態の態様を不必要に曖昧にしないように詳細に説明されなかった。
・様々な基本システムサービスを扱うための手順とハードウェア依存タスクを行うための手順とを含む動作論理、
・無線通信部品(群)204と協力して遠隔装置(例えば、リモートセンサ、送信器、受信器、サーバ、マッピングメモリなど)と結合及び/又は通信するための通信モジュール218、
・例えば、RF充電パッド100の近傍の物体の有無、速度及び/又は位置決めを判断するためにセンサデータを(例えば、センサ212と協力して)取得及び処理するためのセンサモジュール220、
・送電信号を生成する(限定しないが、所与の位置にエネルギーのポケットを形成することを含む)及び送信する(例えば、アンテナ区域290及びそれぞれに含まれるアンテナ210と協力して)ための電力波生成モジュール222。電力波生成モジュール222は、個々のアンテナ区域により、送電信号を送信するために使用される伝送特性を修正するためにも使用され得る、
・限定しないが以下のものを含むデータベース224:
・1つ又は複数のセンサ(例えば、センサ212及び/又は1つ又は複数のリモートセンサ)によって受信、検出及び/又は送信されるデータを格納及び管理するためのセンサ情報226、
・RF充電パッド100及び/又は1つ又は複数の遠隔装置の動作セッティングを格納するための装置セッティング228、
・1つ又は複数のプロトコルのプロトコル情報を格納及び管理するための通信プロトコル情報230(例えば、ZigBee、Z-Waveなどのカスタム又は標準無線プロトコル及び/又はイーサーネットなどのカスタム又は標準有線プロトコル)、
・マッピングデータを格納及び管理する(例えば、1つ又は複数の送信フィールドをマッピングする)ためのマッピングデータ232、
・無線で配送された電力をRF充電パッド100から受信する権限を無線電力受信器が与えられるかどうかを判断するためのセキュア素子モジュール234、
・様々な無線電力受信器に電力を無線で配送するためにいずれのアンテナ区域又は区域群が使用されなければならないかを判断するために、試験送電信号を送信するプロセスと様々なアンテナ区域とを連携させるためのアンテナ区域選択及びチューニングモジュール237(図9A~図9B、図100及び図11A~図11Eを参照して以下にさらに詳細に説明されように)。
・様々な基本システムサービスを扱うための手順とハードウェア依存タスクを行うための手順とを含む動作論理266、
・通信部品(群)254と協力して遠隔装置(例えば、リモートセンサ、送信器、受信器、サーバ、マッピングメモリなど)と結合及び/又は通信するための通信モジュール268、
・例えば、受信器103、RF充電パッド100又は受信器103の近傍の物体の有無、速度及び/又は位置決めを判断するためにセンサデータを(例えば、センサ262と協力して)取得及び処理するためのセンサモジュール270、
・電力波からのエネルギー及び/又はエネルギーポケットからのエネルギーを(例えば、アンテナ(群)260及び/又は電力収集回路259と協力して)受信し、エネルギーを(例えば、直流に)任意選択的に変換し(例えば、電力収集回路259と協力して)、結合された電子装置にエネルギーを転送し、エネルギーを任意選択的に格納する(例えば、エネルギー貯蔵装置261と協力して)ための無線電力受信モジュール272、
・限定しないが以下のものを含むデータベース274:
・1つ又は複数のセンサ(例えば、センサ262及び/又は1つ又は複数のリモートセンサ)によって受信、検出及び/又は送信されるデータを格納及び管理するためのセンサ情報276、
・受信器103、結合された電子装置278及び/又は1つ又は複数の遠隔装置の動作セッティングを格納するための装置セッティング、
・1つ又は複数のプロトコルのプロトコル情報を格納及び管理するための通信プロトコル情報280(例えば、ZigBee、Z-Waveなどのカスタム又は標準無線プロトコル及び/又はイーサーネットなどのカスタム又は標準有線プロトコル)、
・識別情報をRF充電パッド100に提供するためのセキュア素子モジュール282(例えば、RF充電パッド100は、無線電力受信器104が無線で配送された電力を受信する権限を与えられるべきであるかどうかを判断するために識別情報を使用する)。
[00363] 図30は、いくつかの実施形態による無線送電の方法3000を示す流れ図である。方法3000の操作(例えば、工程)は、近接場アンテナ(例えば、近接場アンテナ2500、図25A)に関連付けられたコントローラ(例えば、RF送電器集積回路160、図1A、26)によって行われ得る。図30に示す操作の少なくともいくつかは、コンピュータメモリ又はコンピュータ可読記憶媒体(例えば、充電パッド100のメモリ206、図2A)内に格納される命令に対応する。
Claims (22)
- 反射器と、
前記反射器からオフセットされた4つの別個の共面アンテナ素子であって、前記4つの別個の共面アンテナ素子のそれぞれは、それぞれの蛇行パターンに従い、
前記4つの別個の共面アンテナ素子のうちの2つのアンテナ素子は、第1の軸に沿った第1のダイポールアンテナを形成し、
前記4つの別個の共面アンテナ素子のうちの他の2つのアンテナ素子は、前記第1の軸に対して垂直な第2の軸に沿った第2のダイポールアンテナを形成する、4つの別個の共面アンテナ素子と、
前記第1及び第2のダイポールアンテナの少なくとも1つに電磁気信号を供給するように構成された電力増幅器と、
前記第1及び第2のダイポールアンテナの少なくとも1つのインピーダンスを調整するように構成されたインピーダンス調整部品と、
前記電力増幅器、前記インピーダンス調整部品並びに前記第1及び第2のダイポールアンテナに結合された切り替え回路系であって、
(i)前記第1のダイポールアンテナを前記電力増幅器に、且つ前記第2のダイポールアンテナを前記インピーダンス調整部品に切り替え可能に結合するか、又は
(ii)前記第2のダイポールアンテナを前記電力増幅器に、且つ前記第1のダイポールアンテナを前記インピーダンス調整部品に切り替え可能に結合するように構成される切り替え回路系と、を備える近接場アンテナ。 - 前記近接場アンテナの第1の動作モードでは、前記切り替え回路系は、(i)前記第1のダイポールアンテナを前記電力増幅器に、且つ(ii)前記第2のダイポールアンテナを前記インピーダンス調整部品に結合し、
前記近接場アンテナの第2の動作のモードでは、前記切り替え回路系は、(i)前記第2のダイポールアンテナを前記電力増幅器に、且つ(ii)前記第1のダイポールアンテナを前記インピーダンス調整部品に結合する、請求項1に記載の近接場アンテナ。 - 前記近接場アンテナの前記第1の動作モードでは、前記第1のダイポールアンテナは、前記電力増幅器から電磁波を受信し、且つ第1の偏極を有する前記受信された電磁波を放射し、
前記近接場アンテナの前記第2の動作のモードでは、前記第2のダイポールアンテナは、前記電力増幅器から電磁波を受信し、且つ前記第1の偏極と異なる第2の偏極を有する前記受信された電磁波を放射する、請求項2に記載の近接場アンテナ。 - 前記近接場アンテナからの閾値距離内に位置する無線受電装置は、前記放射された電磁波を収集し、且つ前記無線受電装置に結合された電子装置に給電するか又はそれを充電するために、前記収集された電磁波を使用するように構成される、請求項3に記載の近接場アンテナ。
- 前記切り替え回路系及び前記電力増幅器の動作を制御するように構成されたコントローラをさらに備える、請求項1に記載の近接場アンテナ。
- 前記コントローラは、前記切り替え回路系及び前記電力増幅器の動作を、(i)無線受電装置の位置、(ii)前記無線受電装置の受電アンテナの偏極、及び(iii)前記無線受電装置の空間的配向の1つ又は複数に基づいて制御するように構成される、請求項5に記載の近接場アンテナ。
- 前記第1のダイポールアンテナの前記2つのアンテナ素子の第1のもの及び前記切り替え回路系に接続された第1のフィードであって、前記電力増幅器が前記切り替え回路系によって前記第1のダイポールアンテナに切り替え可能に結合されると、前記電力増幅器に由来する電磁気信号を前記第1のダイポールアンテナの前記第1のアンテナ素子に供給するように構成される、第1のフィードと、
前記第2のダイポールアンテナの前記他の2つのアンテナ素子の第1のもの及び前記切り替え回路系に接続された第2のフィードであって、前記電力増幅器が前記切り替え回路系によって前記第2のダイポールアンテナに切り替え可能に結合されると、前記電力増幅器に由来する電磁気信号を前記第2のダイポールアンテナの前記第1のアンテナ素子に供給するように構成される、第2のフィードと、をさらに備える、請求項1に記載の近接場アンテナ。 - 前記4つの別個の共面アンテナ素子の第1のアンテナ素子は、前記第1のダイポールアンテナの第1のポールであり、
前記4つの別個の共面アンテナ素子の第2のアンテナ素子は、前記第1のダイポールアンテナの第2のポールであり、
前記4つの別個の共面アンテナ素子の第3のアンテナ素子は、前記第2のダイポールアンテナの第1のポールであり、及び
前記4つの別個の共面アンテナ素子の第4のアンテナ素子は、前記第2のダイポールアンテナの第2のポールである、請求項1に記載の近接場アンテナ。 - 前記第1のダイポールアンテナを形成する前記2つのアンテナ素子は、前記第1の軸に対して垂直な2つのセグメントをそれぞれ含み、
前記第2のダイポールアンテナを形成する前記他の2つのアンテナ素子は、前記第1の軸に対して平行な2つのセグメントをそれぞれ含む、請求項1に記載の近接場アンテナ。 - 前記4つの別個のアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンの第1の端部は、前記近接場アンテナの同じ中央部に接し、
前記4つの別個のアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンの第2の端部は、前記近接場アンテナの別個の縁に接し、
前記4つの別個のアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンの最長寸法を有する部分は、前記近接場アンテナの前記同じ中央部より前記近接場アンテナの前記別個の縁に近い、請求項1に記載の近接場アンテナ。 - 前記4つの別個のアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンの最短寸法を有する部分は、前記近接場アンテナの前記別個の縁より前記近接場アンテナの前記同じ中央部に近い、請求項10に記載の近接場アンテナ。
- 前記反射器は、銅又は銅合金の固体金属シートである、請求項1に記載の近接場アンテナ。
- 前記反射器は、前記第1又は第2のダイポールアンテナによって放射される前記電磁気信号の少なくとも一部を反射するように構成される、請求項1に記載の近接場アンテナ。
- 前記4つの別個の共面アンテナ素子は、基板上又はその中に形成される、請求項1に記載の近接場アンテナ。
- 前記基板は、所定の透磁率又は誘電率のメタマテリアルを含む、請求項14に記載の近接場アンテナ。
- 前記それぞれの蛇行パターンは、すべて同じである、請求項1に記載の近接場アンテナ。
- 前記第1のダイポールアンテナを形成する前記2つのアンテナ素子は、前記2つのアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンが互いの鏡像であるように前記第1の軸に沿ってアライメントされる、請求項16に記載の近接場アンテナ。
- 前記第2のダイポールアンテナを形成する前記他の2つのアンテナ素子は、前記他の2つのアンテナ素子のそれぞれによって従われる前記それぞれの蛇行パターンが互いの鏡像であるように前記第2の軸に沿ってアライメントされる、請求項17に記載の近接場アンテナ。
- 受信装置を無線で充電する方法であって、
反射器と、
前記反射器からオフセットされた4つの別個の共面アンテナ素子であって、前記4つの別個の共面アンテナ素子のそれぞれは、それぞれの蛇行パターンに従い、(i)前記4つの別個の共面アンテナ素子のうちの2つのアンテナ素子は、第1の軸とアライメントされた第1のダイポールアンテナを形成し、(ii)前記4つの別個の共面アンテナ素子のうちの別の2つのアンテナ素子は、前記第1の軸に対して垂直な第2の軸とアライメントされた第2のダイポールアンテナを形成する、4つの別個の共面アンテナ素子と、
前記4つの別個の共面アンテナ素子の少なくとも2つに結合された切り替え回路系と、
前記切り替え回路系に結合された電力増幅器と、
前記切り替え回路系に結合されたインピーダンス調整部品と、を備える近接場アンテナを提供することと、
(i)前記第1のダイポールアンテナを前記電力増幅器に、且つ(ii)前記第2のダイポールアンテナを前記インピーダンス調整部品に結合するように前記切り替え回路系に指示することと、
前記切り替え回路系を介して電磁気信号を前記第1のダイポールアンテナに供給するように前記電力増幅器に指示することと、を含み、
前記電磁気信号は、前記第1のダイポールアンテナに供給されると、前記近接場アンテナからの閾値距離内に位置する無線受電装置によって受信される電磁気信号を前記第1のダイポールアンテナに放射させ、
前記第2のダイポールアンテナのインピーダンスは、前記第2のダイポールアンテナの前記インピーダンスが前記第1のダイポールアンテナのインピーダンスと異なるように前記インピーダンス調整部品によって調整される、方法。 - 請求項2~18のいずれか1項に記載の近接場アンテナをさらに含む、請求項19に記載の方法。
- 反射器、4つの別個の共面アンテナ素子、前記4つの別個の共面アンテナ素子の少なくとも2つに結合された切り替え回路系、前記切り替え回路系に結合された電力増幅器及び前記切り替え回路系に結合されたインピーダンス調整部品を有する近接場アンテナの1つ又は複数のプロセッサによって実行されると、前記近接場アンテナに、
(i)第1のダイポールアンテナを前記電力増幅器に、且つ(ii)第2のダイポールアンテナを前記インピーダンス調整部品に結合するように前記切り替え回路系に指示すること、
前記切り替え回路系を介して電磁気信号を前記第1のダイポールアンテナに供給するように前記電力増幅器に指示すること
を行わせる実行可能命令を格納する非一時的コンピュータ可読記憶媒体であって、
前記電磁気信号は、前記第1のダイポールアンテナに供給されると、前記近接場アンテナからの閾値距離内に位置する無線受電装置によって受信される電磁気信号を前記第1のダイポールアンテナに放射させ、
前記第2のダイポールアンテナのインピーダンスは、前記第2のダイポールアンテナの前記インピーダンスが前記第1のダイポールアンテナのインピーダンスと異なるように前記インピーダンス調整部品によって調整される、非一時的コンピュータ可読記憶媒体。 - 1つ又は複数のプログラムは、請求項2~18のいずれか1項に記載の近接場アンテナを実施するための命令をさらに含む、請求項21に記載の非一時的コンピュータ可読記憶媒体。
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US20200119592A1 (en) | 2020-04-16 |
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