CN213459442U - Ultra-wideband capacitor - Google Patents
Ultra-wideband capacitor Download PDFInfo
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- CN213459442U CN213459442U CN202021291547.9U CN202021291547U CN213459442U CN 213459442 U CN213459442 U CN 213459442U CN 202021291547 U CN202021291547 U CN 202021291547U CN 213459442 U CN213459442 U CN 213459442U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 72
- 239000000919 ceramic Substances 0.000 claims description 31
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 238000009499 grossing Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 5
- 239000003985 ceramic capacitor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Abstract
The utility model relates to a field of condenser particularly, relates to an ultra wide band capacitor, including capacitor body, third inner electrode and fourth inner electrode. The third internal electrode is connected with the first external electrode and forms a capacitor. The fourth internal electrode is connected with the second external electrode and forms a capacitor. And capacitors formed by the third internal electrode, the fourth internal electrode and the internal electrodes are all connected in parallel with the capacitance formed by the internal electrodes. When the capacitors with different capacitance values are connected in parallel, the impedance characteristic of the capacitor can be effectively improved. Thereby increasing the resonant frequency of the capacitor, smoothing the impedance of the capacitor over a wide frequency band, and obtaining a smooth insertion loss. The ultra-wideband capacitor has a wide frequency band.
Description
Technical Field
The utility model relates to a field of condenser particularly, relates to an ultra wide band capacitor.
Background
MLCC (Multi-layer Ceramic Capacitors) is an english abbreviation of chip multilayer Ceramic capacitor. Ceramic dielectric films with printed electrodes (inner electrodes) are overlapped in a staggered mode, a ceramic chip is formed through one-time high-temperature sintering, and metal layers (outer electrodes) are sealed at two ends of the chip, so that a structural body similar to a monolithic body is formed, and the monolithic capacitor is also called.
The chip multilayer ceramic capacitor of the prior art has only one size of internal electrodes inside, and the structure of the chip multilayer ceramic capacitor enables the resonant frequency of the capacitor to be fixed to a value and the use frequency band to be small. Meanwhile, if the capacitance value of the capacitor is larger, the impedance characteristic is poorer, and the resonant frequency value is lower, so that the capacitor is not suitable for a high-frequency scene.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultra wide band capacitor, it uses the frequency channel width and frequency of use height.
The embodiment of the utility model is realized like this:
an ultra-wideband capacitor includes a ceramic body, a first external electrode and a second external electrode; the ceramic body comprises a dielectric, a plurality of first internal electrodes and a plurality of second internal electrodes; a plurality of first internal electrodes and a plurality of second internal electrodes are located within the dielectric; a plurality of the first internal electrodes and a plurality of the second internal electrodes are staggered facing each other to form a capacitor;
the first outer electrode is arranged on one side surface of the ceramic main body and is electrically connected with the plurality of first inner electrodes; the second external electrode is arranged on the other side surface of the ceramic main body and is electrically connected with the second internal electrodes; further comprising third and fourth internal electrodes disposed within the dielectric; the third inner electrode is connected with the first outer electrode and forms a capacitor with the second inner electrode; the area of the third internal electrode is smaller than that of the second internal electrode;
the fourth internal electrode is connected with the second external electrode and forms a capacitor with the first internal electrode; the area of the fourth internal electrode is smaller than that of the first internal electrode.
Further, a fifth internal electrode and a sixth internal electrode disposed within the dielectric are also included; the fifth inner electrode is connected to the first outer electrode; the sixth inner electrode is connected to the second outer electrode; and the fifth internal electrode and the sixth internal electrode do not form capacitance with other internal electrodes.
Furthermore, the fifth inner electrode and the sixth inner electrode are both in a C shape; the fifth internal electrode and the sixth internal electrode are respectively arranged at one end of the ceramic main body and extend to the other end of the ceramic main body along two sides of the ceramic main body.
Furthermore, a first mounting gap is formed between the side edge of the first inner electrode except the side edge connected with the first outer electrode and the side edge of the ceramic main body; the fifth inner electrode is arranged in the first mounting gap;
a second mounting gap is formed between the side edge of the second inner electrode except the side edge connected with the second outer electrode and the side edge of the ceramic main body; the fifth inner electrode is disposed in the second mounting gap.
Further, the first and second internal electrodes are alternately stacked; and fifth and sixth internal electrodes are arranged at two ends of the stacking direction of the first and second internal electrodes.
Furthermore, the direction from the first outer electrode to the second inner electrode is the length direction; a gap is arranged between the fifth internal electrode and the sixth internal electrode along the length direction; the width of the gap between the fifth internal electrode and the sixth internal electrode is 5% -40% of the width of the capacitor in the length direction.
Further, an area of the fourth internal electrode is different from an area of the third internal electrode.
The utility model has the advantages that:
the third inner electrode is connected with the first outer electrode and forms a capacitor with the second inner electrode; the fourth internal electrode is connected with the second external electrode and forms a capacitor with the first internal electrode. Meanwhile, the area of the third internal electrode is smaller than that of the second internal electrode; the area of the fourth internal electrode is smaller than that of the first internal electrode. This makes the fourth internal electrode form a small capacitance with the first internal electrode and the small capacitance is connected in parallel to the capacitance formed by the first internal electrode and the second internal electrode. Meanwhile, the third internal electrode and the second internal electrode form a small capacitor, and the small capacitor is also connected in parallel with the capacitor formed by the first internal electrode and the second internal electrode.
When the capacitors with different capacitance values are connected in parallel, the impedance characteristic of the capacitor can be effectively improved. Thereby increasing the resonant frequency of the capacitor, smoothing the impedance of the capacitor over a wide frequency band, and obtaining a smooth insertion loss. The ultra-wideband capacitor has a wide frequency band.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is an isometric view of an ultra-wideband capacitor provided by an embodiment of the present invention;
fig. 2 is a front cross-sectional view of an ultra-wideband capacitor provided in an embodiment of the present invention;
fig. 3 is a top cross-sectional view of an ultra-wideband capacitor provided by an embodiment of the present invention;
FIG. 4 is an equivalent circuit diagram of a capacitor;
fig. 5 is a graph of the parallel frequency impedance characteristic of the capacitor.
Icon:
1-ceramic body, 11-dielectric, 12-first internal electrode, 13-second internal electrode, 14-third internal electrode, 15-fourth internal electrode, 16-fifth internal electrode, 17-sixth internal electrode, 18-first mounting gap, 19-second mounting gap, 2-first external electrode, 3-second external electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Example (b):
referring to fig. 1 to 5, the present embodiment provides an ultra-wideband capacitor, which includes a ceramic body 1, a first external electrode 2 and a second external electrode 3. The ceramic body 1 comprises a dielectric 11, a number of first internal electrodes 12 and a number of second internal electrodes 13. The dielectric medium 11 is a plurality of ceramic dielectric diaphragms, and metal electrodes are arranged on the dielectric diaphragms. And a plurality of dielectric membranes are laminated layer by layer. The first and second external electrodes 2 and 3 are each connected to one end of the ceramic main body 1. The metal electrodes of two adjacent dielectric diaphragms are respectively connected to a first external electrode 2 and a second external electrode 3 at one end of the ceramic main body 1. A plurality of metal electrodes connected to the first outer electrode 2 are first inner electrodes 12; the metal electrodes connected to the second external electrode 3 are all second internal electrodes 13. A number of first internal electrodes 12 and a number of second internal electrodes 13 are located within the dielectric 11. The plurality of first internal electrodes 12 and the plurality of second internal electrodes 13 are interleaved facing each other to form a capacitor.
And further includes third and fourth internal electrodes 14 and 15 disposed within the dielectric 11. The third and fourth internal electrodes 14 and 15 are fitted with the dielectric 11 in the same manner as the first and second internal electrodes 12 and 13 are fitted with the dielectric 11. The third inner electrode 14 is disposed adjacent to the first outer electrode 2. The third internal electrode 14 is connected to the first external electrode 2 and forms a capacitance with the second internal electrode 13. The area of the third internal electrode 14 is smaller than that of the second internal electrode 13. So that the area of the face of the third internal electrode 14 facing the second internal electrode 13 is smaller than the area of the face of the second internal electrode 13 facing the first internal electrode 12. That is, the capacitance of the capacitance formed by the third internal electrode 14 and the second internal electrode 13 is smaller than the capacitance of the capacitance formed by the first internal electrode 12 and the second internal electrode 13. Meanwhile, it can be obtained according to the connection manner of the first internal electrode 12, the second internal electrode 13 and the third internal electrode 14 that the capacitance formed by the third internal electrode 14 and the second internal electrode 13 is parallel to the capacitance formed by the first internal electrode 12 and the second internal electrode 13.
The fourth internal electrode 15 is disposed adjacent to the second external electrode 3. The fourth internal electrode 15 is connected to the second external electrode 3 and forms a capacitance with the first internal electrode 12. The area of the fourth internal electrode 15 is smaller than that of the first internal electrode 12. So that the area of the face of the fourth internal electrode 15 facing the first internal electrode 12 is smaller than the area of the face of the second internal electrode 13 facing the first internal electrode 12. That is, the capacitance of the capacitance formed by the fourth internal electrode 15 and the first internal electrode 12 is smaller than the capacitance of the capacitance formed by the first internal electrode 12 and the second internal electrode 13. Meanwhile, it can be obtained according to the connection manner of the first internal electrode 12, the second internal electrode 13 and the fourth internal electrode 15 that the capacitance formed by the fourth internal electrode 15 and the first internal electrode 12 is parallel to the capacitance formed by the first internal electrode 12 and the second internal electrode 13.
The third internal electrode 14 is connected to the first external electrode 2 and forms a capacitance with the second internal electrode 13. The fourth internal electrode 15 is connected to the second external electrode 3 and forms a capacitance with the first internal electrode 12. Meanwhile, the area of the third internal electrode 14 is smaller than that of the second internal electrode 13. The area of the fourth internal electrode 15 is smaller than that of the first internal electrode 12. This makes the fourth internal electrode 15 form a small capacitance with the first internal electrode 12 and the small capacitance is connected in parallel to the capacitance formed by the first internal electrode 12 and the second internal electrode 13. Meanwhile, the third internal electrode 14 forms a small capacitance with the second internal electrode 13 and the small capacitance is also connected in parallel to the capacitance formed by the first internal electrode 12 and the second internal electrode 13.
The equivalent circuit of the capacitor can be simplified to a circuit composed of an equivalent inductance (ESL), an ideal capacitance (C), and an Equivalent Series Resistance (ESR), as shown in fig. 4. According to the resonant frequency formula of the capacitor: (L is equivalent series inductance, C is capacitance) can be obtained: the resonant frequency of the capacitor is determined by the equivalent series inductance and capacitance. Under the condition that the capacitance value of the capacitor is fixed, if the capacitance value meets the requirement in a mode that two or more capacitors are connected in parallel, the equivalent series inductance value of the capacitor is smaller than that of a single capacitor. This can effectively raise the resonant frequency of the capacitor by lowering the equivalent series inductance value. Therefore, the ultra-wideband capacitor of the present embodiment is formed by connecting a plurality of capacitors in parallel, and the resonant frequency thereof is increased.
Meanwhile, when the capacitors with different capacitance values are connected in parallel, the impedance characteristic of the capacitor can be effectively improved. For example, two capacitors C1 and C2 with different capacitance values are connected in parallel, and the corresponding impedance-frequency curve is shown in fig. 5. In the figure, Z1 and Z2 are impedance-frequency curves of two capacitors, respectively, and Z is an impedance-frequency curve of a new capacitor formed by connecting the two capacitors in parallel. After the two capacitors of C1 and C2 with different capacitance values are connected in parallel, the impedance of the capacitor tends to be flat in a wide frequency band, and the flat insertion loss is obtained. The utility model discloses an ultra wide band capacitor needs the length and the width of design third inner electrode 14 and fourth inner electrode 15 according to appearance value, and then parallelly connected different electric capacity that hold the value, and then reduces the equivalent series inductance of condenser, makes its frequency of utilization can reach 40GHz even higher. The frequency band used by it has become correspondingly wider.
In this embodiment, a first mounting gap 18 is provided between the side of the first inner electrode 12 except the side connected to the first outer electrode 2 and the side of the ceramic main body 1. A second mounting gap 19 is provided between the side of the second inner electrode 13 except for the side connected to the second outer electrode 3 and the side of the ceramic main body 1.
Also disposed within the dielectric 11 are a fifth internal electrode 16 and a sixth internal electrode 17. The fifth inner electrode 16 is disposed in the first mounting gap 18 and connected to the first outer electrode 2. The sixth internal electrode 17 is disposed in the second mounting gap 19 and connected to the second external electrode 3. This makes the fifth internal electrode 16 not opposed to any one of the internal electrodes connected to the second external electrode 3, and the sixth internal electrode 17 not opposed to any one of the internal electrodes connected to the first external electrode 2; therefore, neither the fifth internal electrode 16 nor the sixth internal electrode 17 forms capacitance with any other internal electrode. The fifth inner electrode 16 is equipotential with the first outer electrode 2, and the sixth inner electrode 17 is equipotential with the second outer electrode 3; further, the fifth internal electrode 16 and the sixth internal electrode 17 form an electric field shield, thereby preventing energy radiation of the internal L1 capacitor and improving transmission efficiency.
In this embodiment, the fifth internal electrode 16 and the sixth internal electrode 17 are both in a "C" shape. The fifth internal electrode 16 and the sixth internal electrode 17 are each provided at one end of the ceramic main body 1 and extend toward the other end of the ceramic main body 1 along both sides of the ceramic main body 1. This makes the fifth inner electrode 16 and the sixth inner electrode 17 wrap the first inner electrode 12 and the second inner electrode 13 more completely, and the shielding effect is better.
In the present embodiment, the first internal electrodes 12 and the second internal electrodes 13 are alternately stacked. Both ends of the stacking direction of the first internal electrodes 12 and the second internal electrodes 13 are provided with fifth internal electrodes 16 and sixth internal electrodes 17. This also makes the fifth inner electrode 16 and the sixth inner electrode 17 wrap the first inner electrode 12 and the second inner electrode 13 more completely, and the shielding effect is better.
In this embodiment, the direction from the first external electrode 2 to the second internal electrode 13 is the longitudinal direction. A gap is provided between the fifth internal electrode 16 and the sixth internal electrode 17 in the longitudinal direction. The gap width between the fifth inner electrode 16 and the sixth inner electrode 17 is 5% -40% of the width of the ultra-wideband capacitor in the length direction. The gap between the fifth internal electrode 16 and the sixth internal electrode 17 is less than 5% of the length of the capacitor in the length direction, which may cause the gap between the fifth internal electrode 16 and the sixth internal electrode 17 to be too small to break down. If the gap between the fifth internal electrode 16 and the sixth internal electrode 17 is greater than 40% of the length of the capacitor in the length direction, the gap between the fifth internal electrode 16 and the sixth internal electrode 17 is too large to wrap the first internal electrode 12 and the second internal electrode 13 better, and the shielding effect is poor.
In this embodiment, the area of the fourth internal electrode 15 is different from the area of the fifth internal electrode 16. This enables the area of the fourth internal electrode 15 and the area of the fifth internal electrode 16 to be different according to the requirement, and is more flexible and variable. The area of the fourth internal electrode 15 and the area of the fifth internal electrode 16 can be set to be the same as needed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An ultra-wideband capacitor comprising a ceramic body (1), a first outer electrode (2) and a second outer electrode (3); the ceramic body (1) comprises a dielectric (11), a plurality of first internal electrodes (12) and a plurality of second internal electrodes (13); a number of first internal electrodes (12) and a number of second internal electrodes (13) are located within the dielectric (11); a number of said first internal electrodes (12) and a number of said second internal electrodes (13) are interleaved facing each other to form a capacitance;
the first outer electrode (2) is arranged on one side surface of the ceramic main body (1) and is electrically connected with the first inner electrodes (12); the second external electrode (3) is arranged on the other side surface of the ceramic main body (1) and is electrically connected with a plurality of second internal electrodes (13); the method is characterized in that: further comprising a third inner electrode (14) and a fourth inner electrode (15) arranged within the dielectric (11); the third inner electrode (14) is connected with the first outer electrode (2) and forms a capacitor with the second inner electrode (13); the area of the third internal electrode (14) is smaller than that of the second internal electrode (13);
the fourth internal electrode (15) is connected with the second external electrode (3) and forms capacitance with the first internal electrode (12); the area of the fourth internal electrode (15) is smaller than the area of the first internal electrode (12).
2. The ultra-wideband capacitor of claim 1, wherein: further comprising a fifth inner electrode (16) and a sixth inner electrode (17) arranged within the dielectric (11); the fifth inner electrode (16) is connected to the first outer electrode (2); the sixth inner electrode (17) is connected to the second outer electrode (3); and the fifth internal electrode (16) and the sixth internal electrode (17) do not form capacitance with other internal electrodes.
3. The ultra-wideband capacitor of claim 2, wherein: the fifth inner electrode (16) and the sixth inner electrode (17) are both in a C shape; the fifth internal electrode (16) and the sixth internal electrode (17) are respectively arranged at one end of the ceramic main body (1) and extend to the other end of the ceramic main body (1) along two sides of the ceramic main body (1).
4. The ultra-wideband capacitor of claim 3, wherein: a first mounting gap (18) is arranged between the side edge of the first inner electrode (12) except the side edge connected with the first outer electrode (2) and the side edge of the ceramic main body (1); the fifth inner electrode (16) is arranged in the first mounting gap (18);
a second mounting gap (19) is arranged between the side edge of the second inner electrode (13) except the side edge connected with the second outer electrode (3) and the side edge of the ceramic main body (1); the fifth inner electrode (16) is disposed in the second mounting gap (19).
5. The ultra-wideband capacitor of claim 4, wherein: the first inner electrode (12) and the second inner electrode (13) are stacked alternately; and fifth inner electrodes (16) and sixth inner electrodes (17) are arranged at two ends of the first inner electrodes (12) and the second inner electrodes (13) in the stacking direction.
6. The ultra-wideband capacitor of claim 2, wherein: the direction of the first outer electrode (2) to the second inner electrode (13) is a length direction; a gap is arranged between the fifth inner electrode (16) and the sixth inner electrode (17) along the length direction; the width of a gap between the fifth inner electrode (16) and the sixth inner electrode (17) is 5% -40% of the length of the capacitor in the length direction.
7. The ultra-wideband capacitor of claim 2, wherein: the area of the fourth internal electrode (15) is different from the area of the third internal electrode (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021291547.9U CN213459442U (en) | 2020-07-03 | 2020-07-03 | Ultra-wideband capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021291547.9U CN213459442U (en) | 2020-07-03 | 2020-07-03 | Ultra-wideband capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN213459442U true CN213459442U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021291547.9U Active CN213459442U (en) | 2020-07-03 | 2020-07-03 | Ultra-wideband capacitor |
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| CN (1) | CN213459442U (en) |
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- 2020-07-03 CN CN202021291547.9U patent/CN213459442U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An ultra-wideband capacitor Effective date of registration: 20230131 Granted publication date: 20210615 Pledgee: Chenghua sub branch of Bank of Chengdu Co.,Ltd. Pledgor: Chengdu Hongke Electronic Technology Co.,Ltd. Registration number: Y2023510000037 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231205 Granted publication date: 20210615 Pledgee: Chenghua sub branch of Bank of Chengdu Co.,Ltd. Pledgor: Chengdu Hongke Electronic Technology Co.,Ltd. Registration number: Y2023510000037 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |