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Caractéristiques d'absorption des micro-ondes dans les hexaferrites Ba-Co-Ti et Sr-Mn-Ti
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ISBN10: 6208970598
ISBN13: 9786208970598
Publisher: Editions Notre Savoir
Published: Jun 18 2025
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786208970598
Publisher: Editions Notre Savoir
Published: Jun 18 2025
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: French
L'étude des caractéristiques d'absorption des micro-ondes pour les ferrites hexagonales de type M Ba-Co-Ti et Sr-Mn-Ti est réalisée en fonction de la substitution et de la fréquence dans la bande X. La mesure des caractéristiques d'absorption a été réalisée à l'aide d'un dispositif de test d'absorption (ATD) et le critère du quart de longueur d'onde a été utilisé pour évaluer l'absorption. Dans le ferrite BaCoxTixFe(12-2x)O19, x = 0,9 présente une RL maximale de -31,94 dB à 10,47 GHz. Les compositions x = 0,1, 0,5, 0,7 et 0,9 satisfont au critère du quart d'onde (QWC) en faisant correspondre l'épaisseur théorique de 3,5 mm, 3,2 mm, 3,2 mm et 3,2 mm à l'épaisseur réelle de 3,3 mm, 3,4 mm, 3,2 mm et 3,3 mm aux fréquences d'adaptation de 10, 49 GHz, 9,27 GHz, 10,47 GHz et 10,47 GHz respectivement. Dans la ferrite SrMnxTixFe(12-2x)O19, la composition x = 0,5 présente de bonnes caractéristiques de blindage électromagnétique avec une puissance réfléchie de 96,94 % à 8,27 GHz. Les compositions x = 2,0 et x = 1,5 présentent une RL maximale de -14,68 dB et -12,16 dB à 12 GHz. La composition x=1,0 présente une puissance absorbée supérieure à 90 % à 9,53 GHz. Les compositions x= 1,0, 1,5 et 2,0 avec une épaisseur réelle de 3,8, 3,4 et 2,3 mm satisfont au QWC (3,7, 3,3 et 2,3 mm) à 12 GHz.
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Singh, Charanjeet
Wlaściwości pochlaniania mikrofal w heksaferrytach Ba-Co-Ti i Sr-Mn-Ti
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