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Wireless Power Transfer to Miniature Implants: Transmitter Optimization
This paper examines transmitter optimization for wirelessly powering a small implant embedded in tissue. The wireless link between the transmitter and receiver is first modeled as a two-port network and an expression for the power transfer efficiency derived. For a given small receiver in a multilay...
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Published in: | IEEE transactions on antennas and propagation 2012-10, Vol.60 (10), p.4838-4845 |
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description | This paper examines transmitter optimization for wirelessly powering a small implant embedded in tissue. The wireless link between the transmitter and receiver is first modeled as a two-port network and an expression for the power transfer efficiency derived. For a given small receiver in a multilayer tissue model, the transmitter is abstracted as a sheet of magnetic current density for which the optimal distribution is analytically found. The optimal transmitter is compared to the point and uniform source across a range of frequencies. At higher frequencies, the optimal current distribution is shown to induce fields that exhibit focusing. The effects of constructive and destructive interference substantially improves the power transfer efficiency and reinforces operation in the low GHz-range. The optimal transmitter establishes an upper bound on the power transfer efficiency for a given implant and provides insight on the design of the optimal transmit antenna. |
doi_str_mv | 10.1109/TAP.2012.2207341 |
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S. ; Poon, A. S. Y.</creator><creatorcontrib>Sanghoek Kim ; Ho, J. S. ; Poon, A. S. Y.</creatorcontrib><description>This paper examines transmitter optimization for wirelessly powering a small implant embedded in tissue. The wireless link between the transmitter and receiver is first modeled as a two-port network and an expression for the power transfer efficiency derived. For a given small receiver in a multilayer tissue model, the transmitter is abstracted as a sheet of magnetic current density for which the optimal distribution is analytically found. The optimal transmitter is compared to the point and uniform source across a range of frequencies. At higher frequencies, the optimal current distribution is shown to induce fields that exhibit focusing. The effects of constructive and destructive interference substantially improves the power transfer efficiency and reinforces operation in the low GHz-range. The optimal transmitter establishes an upper bound on the power transfer efficiency for a given implant and provides insight on the design of the optimal transmit antenna.</description><identifier>ISSN: 0018-926X</identifier><identifier>EISSN: 1558-2221</identifier><identifier>DOI: 10.1109/TAP.2012.2207341</identifier><identifier>CODEN: IETPAK</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Antennas ; Applied sciences ; Atmospheric modeling ; Couplings ; Current density ; Current distribution ; Efficiency ; Exact sciences and technology ; Focusing ; Implants ; Layered media ; Magnetic multilayers ; near-field antenna ; Optimization ; Power transfer ; power transfer efficiency ; Protective coatings ; Radiocommunications ; Receivers ; SAR ; Spray painting ; Telecommunications ; Telecommunications and information theory ; Transmitters ; Transmitters. Receivers ; wireless implant ; wireless power transfer</subject><ispartof>IEEE transactions on antennas and propagation, 2012-10, Vol.60 (10), p.4838-4845</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Y.</creatorcontrib><title>Wireless Power Transfer to Miniature Implants: Transmitter Optimization</title><title>IEEE transactions on antennas and propagation</title><addtitle>TAP</addtitle><description>This paper examines transmitter optimization for wirelessly powering a small implant embedded in tissue. The wireless link between the transmitter and receiver is first modeled as a two-port network and an expression for the power transfer efficiency derived. For a given small receiver in a multilayer tissue model, the transmitter is abstracted as a sheet of magnetic current density for which the optimal distribution is analytically found. The optimal transmitter is compared to the point and uniform source across a range of frequencies. At higher frequencies, the optimal current distribution is shown to induce fields that exhibit focusing. The effects of constructive and destructive interference substantially improves the power transfer efficiency and reinforces operation in the low GHz-range. The optimal transmitter establishes an upper bound on the power transfer efficiency for a given implant and provides insight on the design of the optimal transmit antenna.</description><subject>Antennas</subject><subject>Applied sciences</subject><subject>Atmospheric modeling</subject><subject>Couplings</subject><subject>Current density</subject><subject>Current distribution</subject><subject>Efficiency</subject><subject>Exact sciences and technology</subject><subject>Focusing</subject><subject>Implants</subject><subject>Layered media</subject><subject>Magnetic multilayers</subject><subject>near-field antenna</subject><subject>Optimization</subject><subject>Power transfer</subject><subject>power transfer efficiency</subject><subject>Protective coatings</subject><subject>Radiocommunications</subject><subject>Receivers</subject><subject>SAR</subject><subject>Spray painting</subject><subject>Telecommunications</subject><subject>Telecommunications and information theory</subject><subject>Transmitters</subject><subject>Transmitters. Receivers</subject><subject>wireless implant</subject><subject>wireless power transfer</subject><issn>0018-926X</issn><issn>1558-2221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNpdkMtLAzEQh4MoWB93wcuCCF62JpNJduNNio9CpR4qeluy2wQi-6hJiuhfb2SLB08zw3wz_PgIOWN0yhhV16vb5ylQBlMAWnBke2TChChzAGD7ZEIpK3MF8u2QHIXwnkYsESfk4dV505oQsufh0_hs5XUfbGrikD253um49Sabd5tW9zHcjPvOxZiQ5Sa6zn3r6Ib-hBxY3QZzuqvH5OX-bjV7zBfLh_nsdpE3SFnMrRFALTWyrKEoUBSlUIoBrJFbxFKZAguEtVJWqHWhaws1xUbxhltdi7rkx-Rq_Lvxw8fWhFh1LjSmTfHMsA0V40xIyRTHhF78Q9-Hre9TuioJEygoR5koOlKNH0LwxlYb7zrtvxJU_Zqtktnq12y1M5tOLnePdWh0a5OSxoW_O5ACUUKRuPORc8aYv7UELqmk_AcwD4AZ</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Sanghoek Kim</creator><creator>Ho, J. S.</creator><creator>Poon, A. S. Y.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20121001</creationdate><title>Wireless Power Transfer to Miniature Implants: Transmitter Optimization</title><author>Sanghoek Kim ; Ho, J. S. ; Poon, A. S. Y.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c401t-fe520f0e68b2774578599122d43f4489e74742d99f59d7abf2b04c93c3fab5b83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Antennas</topic><topic>Applied sciences</topic><topic>Atmospheric modeling</topic><topic>Couplings</topic><topic>Current density</topic><topic>Current distribution</topic><topic>Efficiency</topic><topic>Exact sciences and technology</topic><topic>Focusing</topic><topic>Implants</topic><topic>Layered media</topic><topic>Magnetic multilayers</topic><topic>near-field antenna</topic><topic>Optimization</topic><topic>Power transfer</topic><topic>power transfer efficiency</topic><topic>Protective coatings</topic><topic>Radiocommunications</topic><topic>Receivers</topic><topic>SAR</topic><topic>Spray painting</topic><topic>Telecommunications</topic><topic>Telecommunications and information theory</topic><topic>Transmitters</topic><topic>Transmitters. Receivers</topic><topic>wireless implant</topic><topic>wireless power transfer</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sanghoek Kim</creatorcontrib><creatorcontrib>Ho, J. S.</creatorcontrib><creatorcontrib>Poon, A. S. Y.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Xplore</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on antennas and propagation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sanghoek Kim</au><au>Ho, J. S.</au><au>Poon, A. S. Y.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Wireless Power Transfer to Miniature Implants: Transmitter Optimization</atitle><jtitle>IEEE transactions on antennas and propagation</jtitle><stitle>TAP</stitle><date>2012-10-01</date><risdate>2012</risdate><volume>60</volume><issue>10</issue><spage>4838</spage><epage>4845</epage><pages>4838-4845</pages><issn>0018-926X</issn><eissn>1558-2221</eissn><coden>IETPAK</coden><notes>ObjectType-Article-2</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-1</notes><notes>content type line 23</notes><abstract>This paper examines transmitter optimization for wirelessly powering a small implant embedded in tissue. The wireless link between the transmitter and receiver is first modeled as a two-port network and an expression for the power transfer efficiency derived. For a given small receiver in a multilayer tissue model, the transmitter is abstracted as a sheet of magnetic current density for which the optimal distribution is analytically found. The optimal transmitter is compared to the point and uniform source across a range of frequencies. At higher frequencies, the optimal current distribution is shown to induce fields that exhibit focusing. The effects of constructive and destructive interference substantially improves the power transfer efficiency and reinforces operation in the low GHz-range. The optimal transmitter establishes an upper bound on the power transfer efficiency for a given implant and provides insight on the design of the optimal transmit antenna.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TAP.2012.2207341</doi><tpages>8</tpages></addata></record> |
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subjects | Antennas Applied sciences Atmospheric modeling Couplings Current density Current distribution Efficiency Exact sciences and technology Focusing Implants Layered media Magnetic multilayers near-field antenna Optimization Power transfer power transfer efficiency Protective coatings Radiocommunications Receivers SAR Spray painting Telecommunications Telecommunications and information theory Transmitters Transmitters. Receivers wireless implant wireless power transfer |
title | Wireless Power Transfer to Miniature Implants: Transmitter Optimization |
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