TWI423516B - The use of dielectric resonators to design negative refractive index media - Google Patents

Description

Designing a negative refractive index medium using a dielectric resonator

The present invention relates to negative refractive index media, and more particularly to the design of negative refractive index media using dielectric resonators.

With the advancement of communication technology, all aspects of industry, science, and medicine have been applied, and the wireless communication products used have gradually diversified, especially in the field of mobile communication such as car phones and mobile phones. It is characterized by portability and low power. Therefore, not only the high-frequency and high-frequency characteristics of electronic devices such as resonators, filters, capacitors and the like used in mobile communication devices are considered to be extremely important, and further how to make the product size smaller and loss. Lower is one of the important design considerations.

For example, in the current 5.25 GHz band of the open wireless local area network, due to the high operating frequency, a microstrip antenna using a conventional technique has the disadvantage that the ohmic loss of the conductor is excessively large, and if another conventional technique, the dielectric resonator antenna is There is basically no conductor ohmic loss and high radiation efficiency, and it has the advantages of low loss and high gain, so it is very suitable for such high-band operation. However, the conventional dielectric resonator antenna has a dielectric constant of about 20 to 30, and its height is higher than that of the microstrip antenna. Therefore, in general, the dielectric resonator antenna is required to reduce the volume, especially the antenna height. The method of increasing the dielectric constant of the dielectric (generally greater than 70) is often used in the design. However, increasing the dielectric constant of the dielectric causes a decrease in the operating bandwidth of the antenna, and often cannot meet the bandwidth requirement in the frequency band.

However, in order to meet the demand for such materials, the conventional BaO-rare earth oxide-TiO ₂ ceramic composition is one of the considerations. In addition to the desire to achieve miniaturization, it is desirable to achieve a dielectric constant. (dielectric constant) is high, and the dielectric loss is small. However, the BaO-rare earth oxide-TiO ₂ dielectric ceramic composition suitable for a small-sized high-frequency device has an extremely high dielectric constant. Even if a method of adding other components is changed, it is difficult to achieve a BaO-rare earth oxide-TiO ₂ -based ceramic composition having a low dielectric constant, which is difficult to achieve and costly.

Therefore, the inventors have proposed an innovative and progressive dielectric resonator technology to achieve the aforementioned problems that have not been solved.

Accordingly, it is an object of the present invention to design a negative refractive index medium using a dielectric resonator with a small dielectric loss and isotropic.

Based on the above object, the present invention is a dielectric refractive resonator for designing a negative refractive index medium, which is coupled to a plurality of substrates, and includes at least one unit cell, at least one first cube, and at least one second cube. Arrays having a first pitch and a second pitch perpendicular to each other between the different unit lattices are disposed on a single substrate, and each of the first cubes is oppositely disposed in each of the unit lattices, and Each of the second cubes is disposed opposite to each of the unit cells, and the second cube and the first cube are spaced apart by a third pitch, the first cube and the second cube The dielectric constant is greater than 20.

With the above technical solution, the present invention is a dielectric refractive resonator for designing a negative refractive index medium, which has the following advantages:

1. The present invention utilizes a material having a dielectric constant value of more than 20 or more. The design of the present invention can improve the disadvantage of large dielectric loss caused by the prior art, and the present invention has the advantage of having a small dielectric loss. It is more isotropic and has considerable industrial applicability.

Second, the manufacturing cost and the method of the present invention are relatively simple, and two cubes of the same material can be improved in the prior art by the array arrangement method of the present invention, and cannot be combined with a small volume and a low dielectric constant. The absence of the substance, the method of the present invention can reduce the manufacturing cost and increase the usability of the related industries.

The detailed description of the present invention and the technical description of the present invention are further illustrated by the embodiments, but it should be understood that the embodiments are merely illustrative and not to be construed as limiting.

Please refer to FIG. 1 and FIG. 2 for a schematic perspective view of a three-dimensional structure and a single unit lattice of the present invention. The present invention provides a negative refractive index medium by using a dielectric resonator, which is connected to a plurality of substrates 10 . The method includes: at least one unit cell 20, and an array of a first pitch 201 and a second pitch 202 perpendicular to each other between the unit cells 20 is disposed on a single substrate 10, and each One of the first cubes 21 is oppositely disposed in each of the unit cells 20, and each of the second cubes 22 is oppositely disposed in each of the unit cells 20, and the second cube 22 and the first cube There is a spacing between 21s having a third spacing 203. The first cube 21 and the second cube 22 have a dielectric constant greater than 20, and the third spacing 203 is parallel to the substrate 10.

The material of the substrate 10 is polystyrene. Since the dielectric constant of polystyrene is close to air, the unit cell 20 has a vertical perpendicular to the single substrate 10, and the plurality of substrates 10 are spaced apart. A fourth pitch 220, and in terms of space, the first pitch 201 is defined as the X axis, the second pitch 202 is defined as the Y axis, and the fourth pitch 220 is defined as the Z axis.

However, in the setting of the pitch value, the set range value of the first pitch 201 is selected from 40 mm to 50 mm, and 47.549 mm is the optimum use range value. The set range value of the second spacing 202 is selected from the range of 20 mm to 30 mm, and 22.149 mm is the optimum use range value. The set range value of the third pitch 203 is selected from 7 mm to 8 mm, and 7.5 mm is the optimum use range value. The set range value of the fourth pitch 220 is selected from the range of 20 mm to 30 mm, and 22 mm is the optimum use range value.

The size of the first cube 21 is selected from the group consisting of 10×10×10 cubic millimeters to 7×7×10 cubic millimeters, and the optimal use range is 10×10×10 cubic millimeters. The size of the two cubes 22 is selected from the range of 2×2×10 cubic millimeters to 7×7×10 cubic millimeters, and the optimal use range is 6.5×6.5×10 cubic millimeters. The first cube 21 is The material of the second cube 22 is selected from the group consisting of zirconium oxide (ZrO ₂ ), barium titanate ((Ba, Sr)TiO ₃ ), titanium dioxide (TiO ₂ ) and barium titanate (LaTiO ₃ ).

Please refer to "Figures 3, 4, 5, 6, 7, 8, and 9" as shown in the figure, which is a computer simulation reaction curve and a first cube penetration ratio of the first cube penetration ratio and frequency of the present invention. The actual response curve of the frequency, the penetration ratio, the real part curve of the frequency and phase, the first curve of the real part of the effective parameters and frequency, the second curve of the real part of the effective parameters and frequency, the penetration ratio and the frequency transmission The rate graph and the penetration ratio and the frequency phase conduction curve; and, as in "FIG. 3", the first cube 21 is subjected to computer simulation to see a first cube transmittance curve 210 and a first cube. The phase conduction curve 211, and a first cubic magnetic field reaction 212 and a first cubic electric field reaction 213 can be seen, and the first cubic transmittance curve 210, the first cube can be seen from "FIG. 4". The phase conduction curve 211, the first cubic magnetic field reaction 212 and the first cubic electric field reaction 213, the first cubic magnetic field reaction 212 and the first cubic electric field reaction 213 are seen in "Fig. 3, 4", and the peak values thereof are respectively 4.51GHz 5.78GHz, since the first two figures of the reaction field 212 cubic peak reaction cube 213 with the first field, a difference of less than 0.1GHz, can be said to be quite consistent approximation.

However, as shown in FIG. 5, 6, and 7, it can be seen that the first cube 21 and the second cube 22 of the present invention are simultaneously integrated, and the third spacing 203 between the two is 7.1 mm. Therefore, the two tips formed by the first cubic transmittance curve 210 in "Fig. 3, 4" mean that the first cubic magnetic field reaction 212 and the first cubic electric field reaction 213 disappear, resulting from A first cube real transmittance curve 214 in FIG. 5 and an active region 3030 formed by a second cube real transmittance curve 221, and in FIG. 6 also by a first cube real part The magnetic field curve 215 and a second cube real electric field curve 222 also form the active region 3030, more like the active region 30 shown in FIG. 7 with a frequency of 5.8 to 5.95 GHz.

However, as shown in FIG. 8, the peak value of a second cube transmittance curve 224 is 5.84 GHz and 7.19 GHz (not shown), and the first cube transmittance curve 210 is 4.4 GHz and 5.84 zGHz. When acting simultaneously, that is, a common transmittance curve 40 and the active region 30 in "Fig. 8", and the first cubic phase conduction curve 211 and the second cubic phase conduction curve 225 in "Fig. 9" As shown by the interaction phase conduction curve 50, a negative refractive index is formed, and can be adjusted to 7.5 mm via the third spacing 203, so that the above-described co-action transmittance curve 40 and the coaction phase conduction curve 50 are displayed in 5.84 GHz. The effect of negative refractive index.

In summary, the present invention utilizes the arrangement of the first cube 21 and the second cube 22 having a dielectric constant value greater than 20, and the unit cell 20 of the present invention can be modified to improve the prior art. The invention has the disadvantages of large dielectric loss, and the invention has more isotropic properties when it is used, and has considerable industrial applicability.

Moreover, the manufacturing cost and the method of the present invention are relatively simple, and the first cube 21 and the second cube 22 having the same material are disposed on the substrate 10, so that the conventional technology can be improved. In combination with the absence of a substance having a small volume and a low dielectric constant, the present invention can significantly reduce the manufacturing cost and improve the usability of the related industries.

The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the embodiments of the present invention. That is, the equivalent changes and modifications made by the scope of the patent application of the present invention are covered by the scope of the invention.

10. . . Substrate

20. . . Unit lattice

201. . . First spacing

202. . . Second spacing

203. . . Third spacing

twenty one. . . First cube

210. . . First cube transmittance curve

211. . . First cube phase conduction curve

212. . . First cubic magnetic field reaction

213. . . First cubic electric field reaction

214. . . First cube real transmittance curve

215. . . First cube real magnetic field curve

twenty two. . . Second cube

220. . . Fourth pitch

221. . . Second cube real transmittance curve

222. . . Second cube real electric field curve

223. . . Second cube real refractive index curve

224. . . Second cube transmittance curve

225. . . Second cube phase conduction curve

30. . . Action area

40. . . Cooperative transmittance curve

50. . . Interaction phase conduction curve

Figure 1 is a schematic perspective view of the present invention.

2 is a schematic perspective view of a single unit cell of the present invention.

Figure 3 is a graph showing the computer simulation response of the first cube penetration ratio and frequency of the present invention.

Figure 4 is a graph showing the actual reaction curve of the first cube penetration ratio and frequency of the present invention.

Figure 5 is a real part plot of the penetration ratio, frequency and phase of the present invention.

Figure 6 is a first graph of the real part of the effective parameters and frequencies of the present invention.

Figure 7 is a second graph of the real part of the effective parameters and frequencies of the present invention.

Figure 8 is a graph showing the penetration ratio and frequency transmittance of the present invention.

Figure 9 is a graph showing the penetration ratio and frequency phase conduction of the present invention.

10. . . Substrate

20. . . Unit lattice

twenty one. . . First cube

twenty two. . . Second cube

Claims (8)

A dielectric resonator is used to design a negative refractive index medium, which is coupled to a plurality of substrates, and includes: at least one unit lattice, and different unit crystal lattices have a first pitch and a vertical distance from each other. The array of the second pitch is disposed on a single substrate, and the unit cell has a fourth pitch which is perpendicular to a single substrate and the plurality of substrates are spaced apart, wherein the set value of the fourth pitch is Between 20 mm and 30 mm; at least one first cube, each of the first cubes being disposed opposite each of the unit cells; and at least one second cube, each of the second cubes being oppositely disposed In each of the unit cells, and between the second cube and the first cube, there is a spacing arrangement having a third pitch, and the first cube and the second cube have a dielectric constant greater than 20. A dielectric resonator is used to design a negative refractive index medium, which is coupled to a plurality of substrates, and includes: at least one unit lattice, and different unit crystal lattices have a first pitch and a vertical distance from each other. The array of the second pitch is disposed on a single substrate, wherein the set value of the first pitch is selected from 40 mm to 50 mm; at least one first cube, each of the first cubes is oppositely disposed Each of the unit cells; and at least one second cube, each of the second cubes being disposed opposite each of the unit cells, and having a third spacing between the second cube and the first cube Interval setting method, the first cube and the first The dielectric constant of the two cubes is greater than 20. A dielectric resonator is used to design a negative refractive index medium, which is coupled to a plurality of substrates, and includes: at least one unit lattice, and different unit crystal lattices have a first pitch and a vertical distance from each other. The second pitch array is disposed on a single substrate, wherein the second pitch has a set range value selected from 20 mm to 30 mm; at least one first cube, each of the first cubes is oppositely disposed Each of the unit cells; and at least one second cube, each of the second cubes being disposed opposite each of the unit cells, and having a third spacing between the second cube and the first cube The interval between the first cube and the second cube is greater than 20. A dielectric resonator is used to design a negative refractive index medium, which is coupled to a plurality of substrates, and includes: at least one unit lattice, and different unit crystal lattices have a first pitch and a vertical distance from each other. An array of second pitches disposed on a single one of the substrates; at least one first cube, each of the first cubes being disposed opposite each of the unit cells; and at least one second cube, each of the second cubes being opposite Provided in each of the unit lattices, and the second cube and the first cube are spaced apart by a third pitch, and the first cube and the second cube have a dielectric constant greater than 20. The set value of the third pitch is selected from the range of 7 mm to 8 mm. The negative refractive index medium is designed using a dielectric resonator as described in any one of claims 1 to 4, wherein the third pitch is parallel to the substrate. The negative refractive index medium is designed by using a dielectric resonator according to any one of claims 1 to 4, wherein the size of the first cube is selected from 10×10×10 cubic millimeters to 7 Between 7 and 10 cubic millimeters, the optimum range of use is 10 x 10 x 10 cubic millimeters. The negative refractive index medium is designed by using a dielectric resonator according to any one of claims 1 to 4, wherein the size of the second cube is selected from 2×2×10 cubic millimeters to 7 Between ×7 × 10 mm 3 , the optimum range of use is 6.5 × 6.5 × 10 mm 3 . The negative refractive index medium is designed by using a dielectric resonator according to any one of claims 1 to 4, wherein the material of the first cube and the second cube is selected from zirconium oxide (ZrO _{2 ).} Any one of barium titanate ((Ba, Sr)TiO ₃ ), titanium dioxide (TiO ₂ ) and barium titanate (LaTiO ₃ ).