摘要:
The invention relates to an yttrium iron garnet ferrite for microwave components, characterized in that its general formula is Y a TR b Bi c Fe d Al e In 1 Ca g Cu h Zr i V j Co k Si I O 12±γ , where: -1 ≤ γ ≤ 1; 3(a+b+c+d+e+f) + 2(g+h+i) + 4(i+l) +5j = 24 ± 2γ; 1 ≤ a ≤ 3.5; 0 ≤ b ≤ 1.5; 0.1 ≤ c ≤ 1, preferably 0.65 ≤ c ≤ 1; 4 ≤ d ≤ 5; 0 ≤ e ≤ 1.5; 0 ≤ f ≤ 0.8; 0 ≤ g ≤ 1; 0.01 ≤ h ≤ 0.05; 0 ≤ i ≤ 0.2; 0 ≤ j ≤ 0.8; 0 ≤ k ≤ 0.5 and 0 ≤ I ≤ 0.5 and where TR is a rare earth preferably chosen from Gd, Dy, Ho or a mixture of rare earths. The invention also relates to processes for manufacturing such a ferrite and a microwave component including it, and to a microwave component thus obtained.
摘要:
The invention relates to a ferrite material of the spinel type based on nickel and zinc, characterized in that it satisfies the following chemical formula: Ni x Mg y Zn t Cu w Co ε Zr z Fe 2 - δ 04 where : 2(x + y + t + w + ε) + 4×z + 3×(2 - δ) = 8; 0
摘要:
The invention relates to an inductive component comprising a stack of layers, said stack comprising layers based on magnetic ferrite, characterised in that: - the magnetic ferrite respects the chemical formula: Ni x Mg y Zn z Cu v Co w Fe 2-δ O 4 where v is nonzero, 0
摘要:
The invention relates to a security document having a contactless chip with data masking. The security document (20) comprises a transponder (10) comprised of an electronic module (102) connected to an antenna (101) placed on a data surface of a first part (22) of the document, said transponder serving to remotely communicate with a reader via an electromagnetic coupling, and comprises a passive masking element (24) of said antenna, which is supported by a second part (21) of the document and can move relative to said first part, said masking element being capable of interfering with the coupling between the transponder and the reader for rendering the reading of the document impossible when the second part is in a predetermined position that corresponds to a closed position of the document.
摘要:
L'invention a pour objet un circulateur hyperfréquence comprenant au moins: - la superposition d'une première cellule et d'une seconde cellule, chaque cellule comportant : o un noyau de matériau ferrite entouré de matériau diélectrique, ledit noyau et ledit matériau diélectrique ou faiblement magnétique étant coffrités; o au moins deux pistes d'accès et une piste de liaison jointes entre elles au niveau du noyau de matériau ferrite, sur une face active de la cellule ;
- au moins une connexion de cellules permettant de relier électriquement ladite piste de liaison de ladite première cellule à ladite piste de liaison de ladite seconde cellule. - ladite superposition comprenant un plan de masse situé entre lesdites faces actives desdites cellules, le tout étant assemblé par cofrittage. L'invention a aussi pour objet un procédé de fabrication d'un circulateur double cellules de l'invention.
摘要:
The invention relates to a security document having a contactless chip with data masking. The security document (20) comprises a transponder (10) comprised of an electronic module (102) connected to an antenna (101) placed on a data surface of a first part (22) of the document, said transponder serving to remotely communicate with a reader via an electromagnetic coupling, and comprises a passive masking element (24) of said antenna, which is supported by a second part (21) of the document and can move relative to said first part, said masking element being capable of interfering with the coupling between the transponder and the reader for rendering the reading of the document impossible when the second part is in a predetermined position that corresponds to a closed position of the document.
摘要:
L'invention a pour objet un matériau ferrite de structure grenat caractérisé en ce qu'il répond à la formule chimique suivante : (Y a TR b Bi b' Fe c Al d In e Ca f Cu g Sn h V i Co j Si k O 12±γ ) + x (Li 2 CO 3 ou Li 2 O ou LiF ou LiCI) avec x, en % massique, compris entre 0,1 et 2 ; avec TR : une terre rare ou une combinaison de terres rares ne comprenant pas l'élément Y ; -1 ≤ γ ≤ 1 ; 3 a + b + b ′ + c + d + e + 2 f + g + j + 4 h + k + 5 i = 24 ± 2 γ ; 0 ≤ a ≤ 2,5 ; 0 ≤ b ≤ 1,5 ; 0,5 ≤ b' 4 ≤ c ≤ 5 ; 0 ≤ d ≤ 1,5 ; 0 ≤ e ≤ 0,8 ; 0 ≤ f ≤ 1; 0 0 0 ≤ i ≤ 0,05 ; 0 ≤ j ≤ 0,5 ; 0 ≤ k ≤ 0,5 le matériau ayant une température de frittage inférieure ou égale à 920 °C. L'invention a aussi pour objet un procédé de fabrication du matériau ferrite de l'invention.