Dielectric resonator for negative refractivity medium
A dielectric resonator for a negative refractivity medium, which is coupled to a plurality of substrates, comprises at least one crystal unit, at least one first crystal cube and at least one second crystal cube. The crystal units are arrayed on the substrate. On an identical substrate, each crystal unit has a first spacing with respect to one adjacent crystal unit and a second spacing with respect to another adjacent crystal unit. The first spacing is vertical to the second spacing. Each crystal unit has one first crystal cube and one second crystal cube. A third spacing exists between the first and second crystal cubes. The first and second crystal cubes have a permittivity greater than 20. The present invention adopts the negative refractivity medium to achieve lower dielectric loss. Further, the present invention features isotropy and has low fabrication cost and high industrial utility.
1. A dielectric resonator for a negative refractivity medium, which is coupled to a plurality of substrates, comprising:
at least one crystal unit, wherein said crystal units are arrayed on said substrate, and wherein on one identical said substrate, each said crystal unit has a first spacing with respect to one adjacent said crystal unit and a second spacing with respect to another adjacent said crystal unit, and said first spacing is vertical to said second spacing;
at least one first crystal cube each arranged inside one said crystal unit; and
at least one second crystal cube each arranged inside one said crystal unit, wherein a third spacing exists between said first crystal cube and said second crystal cube, and wherein said first crystal cube and said second crystal cube have a permittivity greater than 20.
2. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said substrates are made of polystyrene.
3. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said crystal unit has a fourth spacing vertical to said substrates and separating said substrates.
4. The dielectric resonator for a negative refractivity medium according to claim 3 , wherein said first spacing is defined to be an X axis; said second spacing is defined to be a Y axis; and said fourth spacing is defined to be a Z axis.
5. The dielectric resonator for a negative refractivity medium according to claim 3 , wherein said fourth spacing ranges from 20 to 30 mm with 22 mm preferred.
6. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said first spacing ranges from 40 to 50 mm with 47.549 mm preferred.
7. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said second spacing ranges from 20 to 30 mm with 22.149 mm preferred.
8. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said third spacing is parallel to said substrate.
9. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said third spacing ranges from 7 to 8 mm with 7.5 mm preferred.
10. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein a volume of said first crystal cube ranges from 7×7×10 to 10×10×10 mm 3 with 10×10×10 mm 3 preferred.
11. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein a volume of said second crystal cube ranges from 2×2×10 to 7×7×10 mm 3 with 6.5×6.5×10 mm 3 preferred.
12. The dielectric resonator for a negative refractivity medium according to claim 1 , wherein said first crystal cube and said second crystal cube are made of a material selected from a group consisting of zirconium dioxide (ZrO 2 ), barium strontium titanate ((Ba,Sr)TiO 3 ), titanium dioxide (TiO 2 ), and lanthanum titanate (LaTiO 3 ).