发明授权
EP0502079B1 INDUCTIVE INPUT/OUTPUT COUPLING FOR A SURFACE ACOUSTIC WAVE DEVICE
失效
感性输入/输出离合器声表面波器件ON
- 专利标题: INDUCTIVE INPUT/OUTPUT COUPLING FOR A SURFACE ACOUSTIC WAVE DEVICE
- 专利标题(中): 感性输入/输出离合器声表面波器件ON
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申请号: EP91900116.4申请日: 1990-11-13
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公开(公告)号: EP0502079B1公开(公告)日: 1996-02-07
- 发明人: NAGEL, Jon., L.
- 申请人: X-CYTE, INC.
- 申请人地址: 2307 Bering Drive San Jose, CA 95131 US
- 专利权人: X-CYTE, INC.
- 当前专利权人: X-CYTE, INC.
- 当前专利权人地址: 2307 Bering Drive San Jose, CA 95131 US
- 代理机构: Hoffmeister, Helmut, Dr. Dipl.-Phys.
- 优先权: US434234 19891113
- 国际公布: WO9107671 19910530
- 主分类号: H03H9/02
- IPC分类号: H03H9/02 ; G01S13/02
摘要:
Apparatus is disclosed for coupling electrical energy into and/or out of a surface acoustic wave (SAW) device, such as a transponder. The SAW device (10) has a piezoelectric substrate (12) with an exposed surface; at least one SAW transducer (14), disposed on the substrate surface, for converting between electrical energy and SAW energy; and a conductive loop (22) disposed on said substrate surface and electrically connected with said transducer. The conductive loop forms an inductive element for coupling energy into and/or out of the SAW device. A first inductive loop, formed by at least a partial turn of an electrical conductor, is inductively coupled to the conductive loop on the substrate surface. The device for transmitting and/or receiving an electrical signal to and/or from said SAW device incorporates a second inductive loop which is inductively coupled to said first inductive loop. In this way, the first inductive loop forms an intermediate inductive coupling path (38) between the second inductive loop of the transmitting/receiving device and the conductive loop on the substrate surface.
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