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Multiferroic Antennas for Use in Biomedical Applications- [electronic resource]
Multiferroic Antennas for Use in Biomedical Applications- [electronic resource]

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자료유형  
 학위논문
Control Number  
0016935049
International Standard Book Number  
9798380340274
Dewey Decimal Classification Number  
621
Main Entry-Personal Name  
Burnside, Emily Ailene.
Publication, Distribution, etc. (Imprint  
[S.l.] : University of California, Los Angeles., 2023
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2023
Physical Description  
1 online resource(116 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
General Note  
Advisor: Carman, Gregory P.
Dissertation Note  
Thesis (Ph.D.)--University of California, Los Angeles, 2023.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약While there is a need for low frequency (30-300 kHz) communication through lossy media like seawater and the human body, these dielectric cluttered environments present challenges to conventional communication devices in the form of signal attenuation. This is due to the interaction of the electric field component of electromagnetic radiation with the conductive portions of the surrounding media. Magnetoelectric antennas provide a solution to this problem in that they primarily output magnetic energy in the near field. Furthermore, by using strain-driven magnetoelectric antennas, antenna miniaturization is realizable by operating at acoustic resonance rather than electromagnetic resonance. While there have been successful experimental demonstrations of low frequency magnetoelectric antennas, the community lacks a systematic approach for antenna design and characterization.This first half of this work presents a decoupled system of models including a method for predicting magnetic moments of bulk samples using Landau-Lifshitz-Gilbert micromagnetic simulations, enabling radiation predictions via an analytical dipole model, resulting in a paradigm shift from dipole radiation validations to dipole radiation predictions. This work includes a methodical testing approach to assess the antenna's performance in terms of signal strength, quality factor, and radiation patterns, determining the antenna to be comparable to state-of-the-art pacemaker antennas.The second half of this work discusses the design and characterization of a Galfenol antenna which resonates at two distinct frequencies. This second antenna, called a dual band magnetoelectric antenna, allows for communication via frequency shift keying (FSK) and is the first magnetoelectric to accomplish FSK at two resonance frequencies. This work demonstrates that the data bandwidth can be increased by an order of magnitude and discusses potential for future improvement in data bandwidth.This dissertation also features a discussion on parasitic effects and mitigation techniques as well as material parametric studies for improved antenna performance. This work presents a comprehensive procedural guide for the design, fabrication, and characterization of low frequency magnetoelectric antennas, effectively bridging a gap in the existing literature.
Subject Added Entry-Topical Term  
Mechanical engineering.
Subject Added Entry-Topical Term  
Biomedical engineering.
Subject Added Entry-Topical Term  
Electromagnetics.
Subject Added Entry-Topical Term  
Health sciences.
Index Term-Uncontrolled  
Magnetostrictive cores
Index Term-Uncontrolled  
Magnetoelectric antennas
Index Term-Uncontrolled  
Electromagnetic resonance
Index Term-Uncontrolled  
Data bandwidth
Index Term-Uncontrolled  
Electric field
Added Entry-Corporate Name  
University of California, Los Angeles Mechanical Engineering 0330
Host Item Entry  
Dissertations Abstracts International. 85-03B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:642452

MARC

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■035    ▼a(MiAaPQ)AAI30639317
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a621
■1001  ▼aBurnside,  Emily  Ailene.
■24510▼aMultiferroic  Antennas  for  Use  in  Biomedical  Applications▼h[electronic  resource]
■260    ▼a[S.l.]▼bUniversity  of  California,  Los  Angeles.  ▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a1  online  resource(116  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Carman,  Gregory  P.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aWhile  there  is  a  need  for  low  frequency  (30-300  kHz)  communication  through  lossy  media  like  seawater  and  the  human  body,  these  dielectric  cluttered  environments  present  challenges  to  conventional  communication  devices  in  the  form  of  signal  attenuation.  This  is  due  to  the  interaction  of  the  electric  field  component  of  electromagnetic  radiation  with  the  conductive  portions  of  the  surrounding  media.  Magnetoelectric  antennas  provide  a  solution  to  this  problem  in  that  they  primarily  output  magnetic  energy  in  the  near  field.  Furthermore,  by  using  strain-driven  magnetoelectric  antennas,  antenna  miniaturization  is  realizable  by  operating  at  acoustic  resonance  rather  than  electromagnetic  resonance.  While  there  have  been  successful  experimental  demonstrations  of  low  frequency  magnetoelectric  antennas,  the  community  lacks  a  systematic  approach  for  antenna  design  and  characterization.This  first  half  of  this  work  presents  a  decoupled  system  of  models  including  a  method  for  predicting  magnetic  moments  of  bulk  samples  using  Landau-Lifshitz-Gilbert  micromagnetic  simulations,  enabling  radiation  predictions  via  an  analytical  dipole  model,  resulting  in  a  paradigm  shift  from  dipole  radiation  validations  to  dipole  radiation  predictions.  This  work  includes  a methodical  testing  approach  to  assess  the  antenna's  performance  in  terms  of  signal  strength,  quality  factor,  and  radiation  patterns,  determining  the  antenna  to  be  comparable  to  state-of-the-art  pacemaker  antennas.The  second  half  of  this  work  discusses  the  design  and  characterization  of  a  Galfenol  antenna  which  resonates  at  two  distinct  frequencies.  This  second  antenna,  called  a  dual  band  magnetoelectric  antenna,  allows  for  communication  via  frequency  shift  keying  (FSK)  and  is  the  first  magnetoelectric  to  accomplish  FSK  at  two  resonance  frequencies.  This  work  demonstrates  that  the  data  bandwidth  can  be  increased  by  an  order  of  magnitude  and  discusses  potential  for  future  improvement  in  data  bandwidth.This  dissertation  also  features  a  discussion  on  parasitic  effects  and  mitigation  techniques  as  well  as  material  parametric  studies  for  improved  antenna  performance.  This  work  presents  a  comprehensive  procedural  guide  for  the  design,  fabrication,  and  characterization  of  low  frequency  magnetoelectric  antennas,  effectively  bridging  a  gap  in  the  existing  literature.
■590    ▼aSchool  code:  0031.
■650  4▼aMechanical  engineering.
■650  4▼aBiomedical  engineering.
■650  4▼aElectromagnetics.
■650  4▼aHealth  sciences.
■653    ▼aMagnetostrictive  cores
■653    ▼aMagnetoelectric  antennas
■653    ▼aElectromagnetic  resonance
■653    ▼aData  bandwidth
■653    ▼aElectric  field
■690    ▼a0548
■690    ▼a0566
■690    ▼a0541
■690    ▼a0607
■71020▼aUniversity  of  California,  Los  Angeles▼bMechanical  Engineering  0330.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935049▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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