1. A dielectric composition comprising:
(a) barium titanate having a specific surface area of 2.5 m2g to 6.0 m2g;
(b) a mixture containing at least one or more materials selected from the group consisting of any one oxide of Mg, Ca, Sr, Ba and Zr, and any one carbide thereof;
(c) oxide containing at least one or more materials selected from the group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
(d) oxide containing at least one or more material selected from the group consisting of Cr, Mn, Fe, Co, and Ni;
(e) oxide containing at least one or more material selected from the group consisting of V, Nb, and Ta; and
(f) oxide containing at least one or more material selected from the group consisting of Si and Al.
2. The dielectric composition according to claim 1,
wherein the barium titanate is expressed as BamTiO3, where 0.995\u2266m\u22661.010.
3. The dielectric composition according to claim 1,
wherein the content of the (b) component is 3 mol to 10 mol relative to 100 mol of the (a) component;
the content of the (c) component is 1 mol to 9 mol relative to 100 mol of the (a) component;
the content of the (d) component is 0.01 mol to 1 mol relative to 100 mol of the (a) component;
the content of the (e) component is 0.01 mol to 1 mol relative to 100 mol of the (a) component; and
the content of the (f) component is 1.5 mol to 5 mol relative to 100 mol of the (a) component.
4. The dielectric composition according to claim 1,
wherein a value of ((total number of moles of the (b) component)\u2212(number of moles of the Zr oxide))(number of moles of the (f) component) is in a range of 1 to 1.5.
5. The dielectric composition according to claim 1,
wherein a value of (number of moles of the (c) component)(number of moles of the (f) component) is in a range of 1.5 to 3.
6. The dielectric composition according to claim 1,
wherein a specific surface area of a mixture containing the (b) component, the (c) component, the (d) component, the (e) component, and the (f) component is in a range of 5.0 m2g to 100 m2g.
7. The dielectric composition according to claim 1, further comprising:
(g) Li oxide, wherein the content of the (g) component is 0.01 mol to 0.6 mol relative to 100 mol of the (a) component.
8. The dielectric composition according to claim 7,
wherein a specific surface area of a mixture containing the (b) component, the (c) component, the (d) component, the (e) component, the (f) component, and the (g) component is in a range of 5.0 m2g to 100 m2g.
9. The dielectric composition according to claim 1,
wherein the (b) component and the (e) component have a single oxide form.
10. A ceramic electronic component comprising:
a dielectric layer formed of a dielectric composition, the composition including:
(a) barium titanate having a specific surface area of 2.5 m2g to 6.0 m2g;
(b) a mixture containing at least one or more materials selected from the group consisting of any one oxide of Mg, Ca, Sr, Ba and Zr, and any one carbide thereof;
(c) oxide containing at least one or more materials selected from the group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
(d) oxide containing at least one or more material selected from the group consisting of Cr, Mn, Fe, Co, and Ni;
(e) oxide containing at least one or more material selected from the group consisting of V, Nb, and Ta; and
(f) oxide containing at least one or more material selected from the group consisting of Si and Al.
11. The ceramic electronic component according to claim 10,
wherein the content of the (b) component is 3 mol to 10 mol relative to 100 mol of the (a) component;
the content of the (c) component is 1 mol to 9 mol relative to 100 mol of the (a) component;
the content of the (d) component is 0.01 mol to 1 mol relative to 100 mol of the (a) component;
the content of the (e) component is 0.01 mol to 1 mol relative to 100 mol of the (a) component; and
the content of the (f) component is 1.5 mol to 5 mol relative to 100 mol of the (a) component.
12. The ceramic electronic component according to claim 10,
wherein a specific surface area of a mixture containing the (b) component, the (c) component, the (d) component, the (e) component, and the (f) component is in a range of 5.0 m2g to 100 m2g.
13. The ceramic electronic component according to claim 10, further comprising:
(g) Li oxide, wherein the content of the (g) component is 0.01 mol to 0.6 mol relative to 100 mol of the (a) component.
14. The ceramic electronic component according to claim 13,
wherein a specific surface area of a mixture containing the (b) component, the (c) component, the (d) component, the (e) component, the (f) component, and the (g) component is in a range of 5.0 m2g to 100 m2g.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Antenna system with a diversity order of 2 comprising, on a same substrate provided with a metallization plane, first and second radiating elements positioned on two adjacent sides of the substrate near edges of the said substrate, the first and second radiating elements being each constituted by an F-inverted type antenna printed on the metallization plane side of the substrate, the first and second radiating elements being positioned on the substrate at the level of the corner formed by the two adjacent sides and being linked to each other at an extremity of the F-inverted, said extremity being connected to the metallization plane.
2. System according to claim 1, wherein each F-inverted type antenna is etched in the metallization plane.
3. System according to claim 1, wherein each F-inverted type antenna is etched in at least two metallization planes of the substrate, the strands thus etched being connected by means of vias or metallized holes.
4. System according to claim 1, wherein the F-inverted type antenna comprises a conductive strand parallel to one side of the substrate, the conductive strand extending by one extremity part connected to the metallization plane of the substrate, the antenna being connected to an impedance matched feeder line perpendicular to the conductive strip.
5. System according to claim 4, wherein the antenna has a resonant frequency obtained by using the equation:
D
\ue89e
\ue89e
1
+
H
=
c
4
\xb7
Fres
\xb7
\u025b
eff
wherein c is the speed of light in a vacuum, \u03b5eff the effective permittivity of the propagation environment, Fres the resonant frequency, D1 the length of the conductive strand between its free extremity and the point of connection with the feeder line and H the height between the conductive strand and the metallization plane of the substrate.
6. System according to claim 4, wherein the length of the conductive strands of the two radiating elements is identical.
7. System according to claim 4, wherein the length of the conductive strands of the two radiating elements is different.
8. System according to claim 1, wherein a slot is realized between the two radiating elements at the level of their extremities connected to the metallization plane.
9. System according to claim 8, wherein the length of the slot is chosen so that its resonant frequency matches the resonant frequency of at least one antenna.
10. Electronic card for wireless communication device, featuring an antenna system with a diversity order of 2 according to comprising, on a same substrate provided with a metallization plane, first and second radiating elements positioned on two adjacent sides of the substrate near edges of the said substrate, the first and second radiating elements being each constituted by an F-inverted type antenna printed on the metallization plane side of the substrate, the first and second radiating elements being positioned on the substrate at the level of the corner formed by the two adjacent sides and being linked to each other at an extremity of the F-inverted, said extremity being connected to the metallization plane.