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Características de absorção de micro-ondas em hexaferrite Ba-Co-Ti e Sr-Mn-Ti by Charanjeet Singh

Características de absorção de micro-ondas em hexaferrite Ba-Co-Ti e Sr-Mn-Ti

by Charanjeet Singh , Harpreet Kaur
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Book cover type: Paperback
  • ISBN13: 9786208970628
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edicoes Nosso Conhecimento
  • Publisher Imprint: Edicoes Nosso Conhecimento
  • Publication Date:
  • Pages: 52
  • Original Price: GBP 31.23
  • Language: Portuguese
  • Edition: N/A
  • Item Weight: 82 grams
  • BISAC Subject(s): Electronics / General

A investiga��o das caracter�sticas de absor��o de micro-ondas para ferrites hexagonais Ba-Co-Ti e Sr-Mn-Ti do tipo M � feita em fun��o da substitui��o e frequ�ncia na banda X. A medi��o das caracter�sticas de absor��o foi feita pelo m�todo Absorbing Testing Device (ATD) e o crit�rio de quarto de comprimento de onda � usado para avaliar a absor��o. Na ferrite BaCoxTixFe(12-2x)O19, x=0,9 exibe RL m�ximo de -31,94 dB a 10,47 GHz. As composi��es x=0,1, 0,5, 0,7 e 0,9 satisfazem o crit�rio de quarto de comprimento de onda (QWC) ao corresponderem � espessura te�rica de 3,5 mm, 3,2 mm, 3,2 mm e 3,2 mm com a espessura real de 3,3 mm, 3,4 mm, 3,2 mm e 3,3 mm nas frequ�ncias correspondentes de 10, 49 GHz, 9,27 GHz, 10,47 GHz e 10,47 GHz, respetivamente. Na ferrite SrMnxTixFe(12-2x)O19, a composi��o x=0,5 apresenta boas caracter�sticas de blindagem eletromagn�tica com 96,94% de pot�ncia refletida a 8,27 GHz. As composi��es x=2,0 e x=1,5 apresentam RL m�ximo de -14,68 dB e -12,16 dB a 12 GHz. A composi��o x=1,0 apresenta mais de 90% de pot�ncia absorvida a 9,53 GHz. As composi��es x= 1,0, 1,5 e 2,0 com espessura real de 3,8, 3,4 e 2,3 mm satisfazem QWC (3,7, 3,3 e 2,3 mm) a 12 GHz.

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