CN202737082U - Resonant post with low expansion coefficient - Google Patents
Resonant post with low expansion coefficient Download PDFInfo
- Publication number
- CN202737082U CN202737082U CN201220421871.7U CN201220421871U CN202737082U CN 202737082 U CN202737082 U CN 202737082U CN 201220421871 U CN201220421871 U CN 201220421871U CN 202737082 U CN202737082 U CN 202737082U
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- Prior art keywords
- hole
- expansion coefficient
- resonant
- ground loop
- grounding
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Abstract
The utility model discloses a resonant post with low expansion coefficient. The resonant post with low expansion coefficient comprises a metal resonant rod, a grounding ring whose top is connected with the metal resonant rod. The metal resonant rod and the grounding ring are respectively provided with a first through hole and a second through hole, wherein the first through hole and the second through hole are mutually communicated. The resonant post with low expansion coefficient is characterized in that the grounding ring is an aluminium oxide grounding ring; the surface of the aluminium oxide grounding ring is provided with a silver layer; and the bottom of the aluminium oxide grounding ring is provided with an arc-shaped concave surface. According to the utility model, the surface of the aluminium oxide grounding ring is provided with the silver layer, thus the resonant post with low expansion coefficient can adapt to the frequency range of 2.3G to 4G; the price of aluminium oxide is lower than that of invar steel, thus the production cost of the resonant post can be significantly reduced; and in addition, by arranging the arc-shaped concave surface, annular grounding replaces surface grounding, thus the grounding performance of the resonant post is improved.
Description
Technical field
The utility model relates to the communication equipment technical field, is specifically related to a kind of low-expansion coefficient resonant column.
Background technology
Along with deep exploitation and the extensive use of LTE (Long Term Evolution, Long Term Evolution) frequency range, the commercial filter under the New Schemes uses frequency spectrum more to concentrate in 2.3G ~ 4G band limits.The general invar resonant rod that adopts satisfies harsh full temperature requirement under this frequency range at present.Yet invar resonant rod expensive is so that it is higher to adapt to the production cost of resonant column of 2.3G ~ 4G band limits.
The utility model content
The purpose of this utility model is for above-mentioned technical problem, and a kind of low-expansion coefficient resonant column that can adapt to 2.3G ~ 4G band limits is provided, and this resonant column has lower production cost.
For realizing this purpose, the low-expansion coefficient resonant column that the utility model is designed, comprise the ground loop that metal resonant rod, top are connected with the metal resonant rod, described metal resonant rod and ground loop offer respectively the first through hole and the second through hole that is interconnected, it is characterized in that: described ground loop is the alundum (Al2O3) ground loop, the surface of described alundum (Al2O3) ground loop is provided with silver layer, and the bottom of described alundum (Al2O3) ground loop is provided with arc-shaped concave.
The bottom of described metal resonant rod is provided with annular protrusion, and described metal resonant rod is connected by the top of annular protrusion with the alundum (Al2O3) ground loop.
Described the first through hole and the second through hole are coaxial arrangement, and the equal diameters of the first through hole and the second through hole.
The utility model has the alundum (Al2O3) ground loop of silver layer by the surface is set, so that the utility model can adapt to 2.3G ~ 4G band limits, and because alundum (Al2O3) is low than the price of invar, so the production cost of resonant column has also obtained obvious reduction.In addition, make the utility model replace face ground connection by annular ground connection by arc-shaped concave is set, improved the ground connection performance of resonant column.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the upward view of Fig. 1;
Fig. 3 is use state diagram of the present utility model.
Wherein, 1-metal resonant rod, 1.1-annular protrusion, 2-alundum (Al2O3) ground loop, 2.1-silver layer, the 3-the first through hole, 4-arc-shaped concave, the 5-the second through hole, 6-trip bolt, 7-cavity, 8-cover plate, 9-tuning screw.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Low-expansion coefficient resonant column as depicted in figs. 1 and 2, comprise the ground loop that metal resonant rod 1, top are connected with metal resonant rod 1, metal resonant rod 1 and ground loop offer respectively the first through hole 3 and the second through hole 5 that is interconnected, ground loop is alundum (Al2O3) ground loop 2, the surface of alundum (Al2O3) ground loop 2 is provided with silver layer 2.1, and the bottom of alundum (Al2O3) ground loop 2 is provided with arc-shaped concave 4.Metal resonant rod 1 and silver coated 2.1 alundum (Al2O3) ground loop 2 cooperate as a resonant element and use, so that resonant column has obviously reduced production cost under the prerequisite of guaranteed performance.In addition, the alundum (Al2O3) material has the low-expansion coefficient that is only second to invar, although itself is non-conductive, by after its plated surface silver layer 2.1, make ground loop have good electric conductivity, the adhesive force of its surface silver layer 2.1 can bear electronic assemblies and every authentication test through checking.Arc-shaped concave 4 makes the utility model replace traditional face ground connection form by annular ground connection, has improved the ground connection performance of alundum (Al2O3) ground loop 2.
In the technique scheme, the material selection 45# steel of metal resonant rod 1,45# steel and alundum (Al2O3) cooperate makes resonant column have lower low-expansion coefficient.
In the technique scheme, the bottom of metal resonant rod 1 is provided with annular protrusion 1.1, and metal resonant rod 1 is connected with the top of alundum (Al2O3) ground loop 2 by annular protrusion 1.1.Annular protrusion 1.1 makes between metal resonant rod 1 and the alundum (Al2O3) ground loop 2 as annular contacts, and can further improve the ground connection performance of whole resonant column.
In the technique scheme, the first through hole 3 and the second through hole 5 are coaxial arrangement, and the equal diameters of the first through hole 3 and the second through hole 5.Above-mentioned the first through hole 3 and the second through hole 5 are installing hole, are used for cooperating trip bolt 6 that metal resonant rod 1 and alundum (Al2O3) ground loop 2 are fixed on cavity 7.
When the utility model uses; Trip bolt 6 passes the first through hole 3 of metal resonant rod 1 and the second through hole 5 of ground loop, metal resonant rod 1 and alundum (Al2O3) ground loop 2 are fixedly connected on cavity 7 one ends, the other end of cavity 7 arranges cover plate 8, and the tuning screw 9 that cooperates with resonant column is set on the cover plate 8.
The content that this specification is not described in detail belongs to the known prior art of this area professional and technical personnel.
Claims (3)
1. low-expansion coefficient resonant column, comprise the ground loop that metal resonant rod (1), top are connected with metal resonant rod (1), described metal resonant rod (1) and ground loop offer respectively the first through hole (3) and the second through hole (5) that is interconnected, it is characterized in that: described ground loop is alundum (Al2O3) ground loop (2), the surface of described alundum (Al2O3) ground loop (2) is provided with silver layer (2.1), and the bottom of described alundum (Al2O3) ground loop (2) is provided with arc-shaped concave (4).
2. low-expansion coefficient resonant column according to claim 1, it is characterized in that: the bottom of described metal resonant rod (1) is provided with annular protrusion (1.1), and described metal resonant rod (1) is connected with the top of alundum (Al2O3) ground loop (2) by annular protrusion (1.1).
3. low-expansion coefficient resonant column according to claim 1 and 2 is characterized in that: described the first through hole (3) and the second through hole (5) are coaxial arrangement, and the equal diameters of the first through hole (3) and the second through hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220421871.7U CN202737082U (en) | 2012-08-23 | 2012-08-23 | Resonant post with low expansion coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220421871.7U CN202737082U (en) | 2012-08-23 | 2012-08-23 | Resonant post with low expansion coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737082U true CN202737082U (en) | 2013-02-13 |
Family
ID=47662750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220421871.7U Expired - Lifetime CN202737082U (en) | 2012-08-23 | 2012-08-23 | Resonant post with low expansion coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202737082U (en) |
-
2012
- 2012-08-23 CN CN201220421871.7U patent/CN202737082U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
|
| CX01 | Expiry of patent term |