CN202662760U - Novel strong coupling filter - Google Patents
Novel strong coupling filter Download PDFInfo
- Publication number
- CN202662760U CN202662760U CN 201220184142 CN201220184142U CN202662760U CN 202662760 U CN202662760 U CN 202662760U CN 201220184142 CN201220184142 CN 201220184142 CN 201220184142 U CN201220184142 U CN 201220184142U CN 202662760 U CN202662760 U CN 202662760U
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- CN
- China
- Prior art keywords
- cylinder
- resonant
- housing
- coupling
- filter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a novel strong coupling filter, which comprises a housing and a cover plate. Two cylindrical cavities inside the housing are resonant cavities, wherein a resonant rod is arranged in each resonant cavity; and a cylinder is arranged in the gap between the two resonant cavities, wherein the cylinder is fixed to the bottom of the housing, the cylinder is hollow, a screw is fixedly connected to the top of the cylinder via a nut which is inside the cylinder, the screw protrudes from the top of the cylinder, and a coupling head is installed in the top of the screw. The novel strong coupling filter has the advantages including simple structure, compact and beautiful appearance, and convenient assembling; and compared with the prior art, the filter can improve the coupling amount, reduce the resonant frequency, and carry out fine tuning on the coupling amount between the two resonant rods, thereby improving reliability while reducing the production cost.
Description
Technical field
The utility model relates to the mobile communication technology field, relates in particular to a kind of novel close coupling filter.
Background technology
In existing filter, complex structure, assembling is inconvenient, and production process is many, and production cost is high, and reliability is bad, and the coupling amount between two resonant rods needs fine setting, but can not implementation procedure in the prior art, and resonance frequency is high, and properties of product are not high.
The utility model content
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of novel close coupling filter that can reduce resonance frequency and can finely tune two coupling amounts between resonant rod to be provided.
The utility model is achieved through the following technical solutions:
A kind of novel close coupling filter, comprise a housing, cover plate, it is resonant cavity that described enclosure interior has two cylindrical cavities, two resonant rods are installed on the cover plate to be extend into respectively in two resonant cavitys, it is characterized in that: place a cylinder two resonant cavity intermediate gaps positions, cylinder is fixed on the bottom of described housing, described column body hollows out, there is a screw rod to be fixedly connected with described cylinder top by nut, nut is in column body, and screw rod stretches out the cylinder top, on the top of screw rod coupling head is installed.
At mobile communication equipment, some frequency ratio is lower in the filter, the coupling amount is large and can design realization with this close coupling filter in the product that structure is little, in actual production, debug the coupling amount that needs between two resonant rods of fine setting for convenience, but can not add coupling bar again from top, so add cylinder in two resonant rod centre positions, hollow out in the middle of the cylinder, place a nut in the position of sky and connect a screw rod, on screw rod, add a large coupling head, just reached the purpose that not only can reduce resonance frequency but also can finely tune two coupling amounts between resonant rod.
The utility model has the advantages that: the utility model is simple in structure, and compact profile is attractive in appearance, and is easy to assembly, can improve on original basis the coupling amount of product, reduce resonance frequency, and can finely tune two coupling amounts between resonant rod, when increasing reliability, reduced again production cost.
Description of drawings
Fig. 1 is end view of the present utility model.
Fig. 2 is vertical view of the present utility model.
Embodiment
As depicted in figs. 1 and 2, a kind of novel close coupling filter, comprise a housing 1, cover plate, it is resonant cavity that described enclosure interior has two cylindrical cavities, described cover plate has two resonant rods 2 and 3 to extend into respectively in two resonant cavitys, place a cylinder 4 two resonant cavity intermediate gaps positions, cylinder 4 is fixed on the bottom of described housing 1, described cylinder 4 inside hollow out, and have a screw rod 6 to be fixedly connected with described cylinder 4 tops by nut 5, and nut 5 is in cylinder 4 inside, screw rod 6 stretches out cylinder 4 tops, on the top of screw rod 6 coupling head 7 is installed.
Claims (1)
1. novel close coupling filter, comprise a housing, cover plate, it is resonant cavity that described enclosure interior has two cylindrical cavities, two resonant rods are installed on the cover plate to be extend into respectively in two resonant cavitys, it is characterized in that: place a cylinder two resonant cavity intermediate gaps positions, cylinder is fixed on the bottom of described housing, described column body hollows out, there is a screw rod to be fixedly connected with described cylinder top by nut, nut is in column body, and screw rod stretches out the cylinder top, on the top of screw rod coupling head is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220184142 CN202662760U (en) | 2012-04-26 | 2012-04-26 | Novel strong coupling filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220184142 CN202662760U (en) | 2012-04-26 | 2012-04-26 | Novel strong coupling filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202662760U true CN202662760U (en) | 2013-01-09 |
Family
ID=47457643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220184142 Expired - Fee Related CN202662760U (en) | 2012-04-26 | 2012-04-26 | Novel strong coupling filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202662760U (en) |
-
2012
- 2012-04-26 CN CN 201220184142 patent/CN202662760U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150426 |
|
| EXPY | Termination of patent right or utility model |