CN201893430U - Ceramic filter - Google Patents
Ceramic filter Download PDFInfo
- Publication number
- CN201893430U CN201893430U CN2010206648551U CN201020664855U CN201893430U CN 201893430 U CN201893430 U CN 201893430U CN 2010206648551 U CN2010206648551 U CN 2010206648551U CN 201020664855 U CN201020664855 U CN 201020664855U CN 201893430 U CN201893430 U CN 201893430U
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- China
- Prior art keywords
- conductive film
- ceramic
- dielectric block
- ceramic dielectric
- metal conductive
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Abstract
The utility model relates to a filter, in particular to a ceramic filter, which comprises a ceramic medium block and a metal electrically-conductive film, wherein the upper half part on the front side, the back side and the two side surfaces of the ceramic medium block are respectively provided with an open-circuit area which is not covered by the metal electrically-conductive film, and the rest part of the ceramic medium block is covered by the metal electrically-conductive film. Different from a loop which is formed by conventionally arranging raised patterns on the surface of the ceramic medium block, the surface of the ceramic medium block is provided with a specific groove structure and the metal electrically-conductive film is coated inside the groove, so not only is the precision of products improved, but also the abrasion of the metal electrically-conductive film is greatly reduced, and the abrasion resistance and the stability of the filter are improved. The ceramic filter has the advantages of ultra small size, ultra thinness, low loss, abrasion resistance, good stability, high precision and low cost.
Description
Technical field
The utility model relates to a kind of filter.
Background technology
Ceramic filter is mainly used in the mobile communication system, can effectively frequency be limited within the specific limits.In recent years, along with the fast development of radio communication, radio communication base station and mobile communication system propose higher requirement for filter.In cell phone system, the special requirement filter wants volume little, and is in light weight, will suit simultaneously to produce in enormous quantities, saves cost.At present, extensively adopt the low ceramic material of loss to make the microminiature filter with high-k.Just because of these specific (special) requirements, the Design of Filter precision in the cell phone system is had higher requirement.Usually ceramic filter is raised design to be set on the ceramic dielectric block surface constitute the loop, can reduce the precision of product like this, also wearing and tearing easily.
Summary of the invention
For overcoming above-mentioned shortcoming, the utility model provides a kind of ceramic filter that adopts the surface that given shape groove formation loop is arranged, and can improve the precision and the resistance to wear of product.
For achieving the above object, the technical solution adopted in the utility model is as follows: a kind of ceramic filter, comprise ceramic dielectric block and metal conductive film, the positive the first half of ceramic dielectric block and the back side and two sides are equipped with the district that opens circuit that does not cover metal conductive film, the remainder of ceramic dielectric block all is coated with metal conductive film, the first half in described ceramic dielectric block front is provided with three rectangle grooves, is coated with metal conductive film in the rectangle groove.
Positive the first half of described ceramic dielectric block be positioned at three rectangular recess below be provided with a flat stripe shape groove, flat stripe shape groove length in the horizontal direction is identical with the length summation that three rectangle grooves are arranged in the horizontal direction.
The cavity that forms in the described flat stripe shape groove is for " recessed " font and be coated with metal conductive film.
Be correspondingly provided with three manholes respectively in the bottom surface of three described rectangle grooves, three manholes upper end communicates with three rectangle groove floor and less than the width of described rectangle groove floor, the lower end of three manholes leads directly to the bottom surface of described ceramic dielectric block.
In the middle of being positioned in three described manholes is concentric reducing manhole, its lower end is bigger than the diameter of upper end, and the diameter of all the other two described manhole upper and lower sides is identical and identical with the upper end diameter of described concentric reducing manhole, and three described manhole inwalls all are coated with metal conductive film.
Described ceramic dielectric block is of a size of 2 * 2.5 * 1.2 millimeters.
The beneficial effects of the utility model are that to constitute the loop different with raised design is set on the ceramic dielectric block surface usually, but specific groove structure is set on the ceramic dielectric block surface and metal conductive film is coated in the groove, so not only improved the precision of product, can also significantly reduce the wearing and tearing of metal conductive film, improve the resistance to wear and the stability of filter.The utility model has the advantages that extra small ultra-thinly, loss is low, and is wear-resistant, good stability, and the precision height, cheap.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the front view of ceramic dielectric block.
Fig. 2 is the vertical view of ceramic dielectric block.
Fig. 3 is the upward view of ceramic dielectric block.
Fig. 4 is the front view of ceramic filter.
Fig. 5 is the rearview of ceramic filter.
Fig. 6 is the right view of ceramic filter.
Fig. 7 is the left view of ceramic filter.
1. rectangle grooves among the figure, 2. ceramic dielectric block, 3. flat stripe shape groove, 4. manhole, the district 5. opens circuit.
Embodiment
In conjunction with Fig. 1, Fig. 2 and shown in Figure 3, the first half in described ceramic dielectric block 2 fronts is provided with three rectangle grooves 1; The below that is positioned at three rectangular recess 1 is provided with a flat stripe shape groove 3, flat stripe shape groove 3 length in the horizontal direction is identical with the length summation that three rectangle grooves 1 are arranged in the horizontal direction, and the cavity that forms in the described flat stripe shape groove 3 is " recessed " font; Be correspondingly provided with three manholes 4 respectively in the bottom surface of three rectangle grooves 1, three manhole 4 upper ends communicate with three rectangle groove 1 bottom surfaces and less than the width of described rectangle groove 1 bottom surface, the bottom surface of the straight-through described ceramic dielectric block 2 in the lower end of three manholes 4, in the middle of being positioned in three manholes 4 is concentric reducing manhole 4, its lower end is bigger than the diameter of upper end, and the diameter of all the other two described manhole 4 upper and lower sides is identical and identical with the upper end diameter of described concentric reducing manhole 4; Described ceramic dielectric block 2 is of a size of 2 * 2.5 * 1.2 millimeters.
As Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, figure bend dash area is the part of metallizing conducting film.As shown in Figure 4, the latter half in three rectangle grooves 1 of the first half setting in described ceramic dielectric block 2 fronts and flat stripe shape groove 3 inwall and ceramic dielectric block 2 fronts all is coated with metal conductive film.As Fig. 5, Fig. 6 and shown in Figure 7, be equipped with the district 5 that opens circuit that does not cover metal conductive film with two sides overleaf.
Claims (6)
1. ceramic filter, comprise ceramic dielectric block and metal conductive film, the positive the first half of ceramic dielectric block and the back side and two sides are equipped with the district that opens circuit that does not cover metal conductive film, the remainder of ceramic dielectric block all is coated with metal conductive film, it is characterized in that: the first half in described ceramic dielectric block front is provided with three rectangle grooves, is coated with metal conductive film in the rectangle groove.
2. ceramic filter according to claim 1, it is characterized in that: positive the first half of described ceramic dielectric block be positioned at three rectangular recess below be provided with a flat stripe shape groove, flat stripe shape groove length in the horizontal direction is identical with the length summation that three rectangle grooves are arranged in the horizontal direction.
3. ceramic filter according to claim 2 is characterized in that: the cavity that forms in the described flat stripe shape groove is for " recessed " font and be coated with metal conductive film.
4. ceramic filter according to claim 1, it is characterized in that: be correspondingly provided with three manholes respectively in the bottom surface of three described rectangle grooves, three manholes upper end communicates with three rectangle groove floor and less than the width of described rectangle groove floor, the lower end of three manholes leads directly to the bottom surface of described ceramic dielectric block.
5. ceramic filter according to claim 4, it is characterized in that: in the middle of being positioned in three described manholes is concentric reducing manhole, its lower end is bigger than the diameter of upper end, and the diameter of all the other two described manhole upper and lower sides is identical and identical with the upper end diameter of described concentric reducing manhole, and three described manhole inwalls all are coated with metal conductive film.
6. ceramic filter according to claim 1 is characterized in that: described ceramic dielectric block is of a size of 2 * 2.5 * 1.2 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206648551U CN201893430U (en) | 2010-12-17 | 2010-12-17 | Ceramic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206648551U CN201893430U (en) | 2010-12-17 | 2010-12-17 | Ceramic filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893430U true CN201893430U (en) | 2011-07-06 |
Family
ID=44222898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206648551U Expired - Fee Related CN201893430U (en) | 2010-12-17 | 2010-12-17 | Ceramic filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201893430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792447A (en) * | 2014-01-20 | 2014-05-14 | 常州嘉恩电子科技有限公司 | Ultrahigh-voltage ceramic filter |
| CN111384498A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, duplexer and communication equipment |
-
2010
- 2010-12-17 CN CN2010206648551U patent/CN201893430U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792447A (en) * | 2014-01-20 | 2014-05-14 | 常州嘉恩电子科技有限公司 | Ultrahigh-voltage ceramic filter |
| CN111384498A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, duplexer and communication equipment |
| CN111384498B (en) * | 2018-12-29 | 2022-07-05 | 大富科技(安徽)股份有限公司 | Dielectric filter, duplexer and communication equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20111217 |