CN202871951U - Dielectric filter - Google Patents
Dielectric filter Download PDFInfo
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- CN202871951U CN202871951U CN 201220380022 CN201220380022U CN202871951U CN 202871951 U CN202871951 U CN 202871951U CN 201220380022 CN201220380022 CN 201220380022 CN 201220380022 U CN201220380022 U CN 201220380022U CN 202871951 U CN202871951 U CN 202871951U
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- electrode
- dielectric
- dielectric filter
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Abstract
The utility model relates to a dielectric filter which comprises a cavity (210) and a dielectric resonator (220). The dielectric resonator (220) is fixed into the cavity (210). The dielectric resonator (220) comprises a cylindrical dielectric body which is provided with a through hole (222) in the center. One transverse plane of the cylindrical dielectric body is provided with a transverse plane electrode (223) and a coupling electrode (224). The transverse plane electrode (223) is positioned around the through hole (222). The coupling electrode (224) is separated from the coupling electrode (224). A protective layer (225), a metal layer (226), the transverse plane electrode (223) and the coupling electrode (224) cover on an outer surface of the cylindrical dielectric body. The protective layer (225) is positioned on the transverse plane, equipped with the transverse plane electrode (223) and the coupling electrode (224), of the cylindrical dielectric body. The metal layer (226) covers a peripheral surface of the cylindrical dielectric body and is separated from the coupling electrode (224). The dielectric filter allows transmission zero points to be easily realized, enables outband inhibition to be enhanced and enables a Q value to be improved.
Description
[technical field]
The utility model relates to the microwave communication field, relates in particular to a kind of dielectric filter.
[background technology]
Filter is the critical component in the various mobile communication system, is used for filtering communication signal frequency outer clutter or interference signal.The continuous lifting of communication system performance is had higher requirement to filter, requires that filter loss is little, volume is little, lightweight.TEM mould dielectric filter is owing to can use the dielectric material of high-k, and that volume can be done is very little, is widely used in the various device.
Existing TEM(transverse electromagnetic) the mould dielectric filter is general adopts single silver electrode assembled, and as shown in Figure 1, and there are a lot of inferior positions in actual applications in the unitary electrode filter, can't satisfy simultaneously the Performance And Reliability requirement.Silver electrode design of filter mode is single, can't realize diversity, realizes the transmission zero difficulty, and Out-of-band rejection is relatively poor, and the Q value is on the low side, and requirement on machining accuracy is high, and debug difficulties is difficult to satisfy the filter high performance requirements.
[summary of the invention]
The utility model provides a kind of dielectric filter, comprise cavity and dielectric resonator, described dielectric resonator is fixed to described cavity, described dielectric resonator comprises the Cylindric medium body, the centre has through hole, one end face of described Cylindric medium body is provided with end electrode and coupling electrode, and described end electrode is positioned at around the described through hole, and described coupling electrode separates with described end electrode.
In a preferred embodiment of the present utility model, the outer surface protected seam of described Cylindric medium body, metal level and described end electrode, coupling electrode cover; Described protective layer is positioned at the end face of the described end electrode of being provided with of described Cylindric medium body, coupling electrode.
In a preferred embodiment of the present utility model, described metal level covers the outer surface of described Cylindric medium body, separates with described coupling electrode.
In a preferred embodiment of the present utility model, described cavity has resonant cavity and is used for dielectric resonator is installed, and described resonant cavity comprises step through-hole, and described dielectric resonator is installed to the step of described step through-hole.
In a preferred embodiment of the present utility model, be communicated with by coupling window between the described resonant cavity.
In a preferred embodiment of the present utility model, the electroplate of described step through-hole.
In a preferred embodiment of the present utility model, described dielectric filter has cover plate, and described cover plate is fastening by screw and described cavity, and described cover plate is provided with tuning screw and is used for frequency tuning.
In a preferred embodiment of the present utility model, the two ends of described cavity are provided with joint.
In a preferred embodiment of the present utility model, described end electrode is annular electrode, be looped around described through hole around.
In a preferred embodiment of the present utility model, described dielectric filter is transverse electric and magnetic mode (TEM) dielectric filter.
In a preferred embodiment of the present utility model, described end electrode and coupling electrode form at the surface metalation of dielectric resonator, perhaps are made from silver.
The cavity of the dielectric filter that the utility model preferred embodiment provides is provided with some resonant cavitys; each resonant cavity is equipped with dielectric resonator; have through hole in the middle of the dielectric resonator; the end face of dielectric resonator one end is provided with end electrode; coupling electrode; end electrode and coupling electrode are by making in the dielectric surface metallization; for example be made from silver; covering metal layer except protective surface; form shield; wherein form cross-couplings between the partial resonance chamber, be provided with coupling window between at least one pair of resonator, by coupling piece the coupling electrode on the dielectric resonator is linked to each other; carry out the Energy Coupling between resonator; the cavity outside is provided with cover plate, and cover plate is provided with tuner, can carry out frequency tuning.This kind mould dielectric filter flexible design can be arranged arbitrarily, is easy to realize transmission zero, improves Out-of-band rejection, can significantly improve the Q value, has increased debugging apparatus, reduces requirement on machining accuracy, realizes high performance filter.
[description of drawings]
Fig. 1 is a kind of TEM mould dielectric filter schematic diagram of prior art;
Fig. 2 is the TEM mould dielectric filter structural representation of an embodiment of the utility model;
Fig. 3 is the structural representation of the dielectric resonator of dielectric filter shown in Figure 2;
Fig. 4 is the structural representation of the cavity of dielectric filter shown in Figure 2;
Fig. 5 is the structural representation of the cover plate of dielectric filter shown in Figure 2.
[embodiment]
With reference to figure 2, the TEM mould dielectric filter that embodiment of the utility model provides comprises cavity 210 and cover plate 240, dielectric resonator 220, coupling line 230 and resonant column 250 etc.Cavity 210 has some resonant cavitys and is used for installing dielectric resonator 220.Each dielectric resonator 220 represents a resonant element, dielectric resonator 220 can be fixed on the cavity 210 by welding or other modes, link to each other by coupling line 230 between the dielectric resonator 220, carry out the energy transmission, by screw that cover plate 240 and cavity 210 is fastening, cover plate 240 is provided with tuning screw 250, can carry out frequency tuning.
With reference to figure 3, the TEM mould dielectric resonator 220 that present embodiment provides comprises: dielectric 221, centre have through hole 222.Tuning screw 250 stretches into through hole 222, to carry out frequency tuning.The end face of dielectric 221 1 ends is provided with end electrode 223, coupling electrode 224.Electrode 223 and 224 is made in the dielectric surface metallization.Preferably, dielectric 221 is except the protective surface 225 that is positioned at end face, and other places are covering metal layer 226 all, forms shield.Dielectric 221 generally is ceramic material, and column can be cylindric but it is cylindric to be not limited to, and hole 222 is opened in the centre.End electrode 223 be looped around through hole 222 around, and coupling electrode 223 is in the periphery of end electrode 223.Through hole 222 as filter unit carries out filtering with end electrode 223 formation electromagnetic coupled, and its shape and size are determined by the performance index of filter.Coupling electrode 224 by making in the dielectric surface metallization, is arranged at the periphery of the described end face of described dielectric, does not link to each other with end electrode 223 with metal level 226.Each dielectric resonator has at least a slice coupling electrode 224, but is not limited to a slice, and coupling electrode 224 quantity and shape are decided according to performance of filter; Electrode can by with the needs formation pattern of metal slurry silk screen printing according to the performance of filter design, then burn attached fixing.
With reference to figure 4, cavity 210 has circular resonant chamber 211, is through hole, and dielectric resonator 220 is corresponding one by one.Resonant cavity 211 is stepped holes, and top hole 212 diameters are larger than the external diameter of dielectric resonator, and lower face 213 diameters are less than the external diameter of dielectric resonator, is used for placing dielectric resonator.Cavity 210 materials are metal or nonmetal and surface metalation, and for improving conductance, the surface can be silver-plated, has coupling window 214 between the resonant cavity.
With reference to figure 5, the cover plate 240 of the utility model embodiment is provided with screwed hole 241 above the resonant element of correspondence on the cover plate 240, can place tuning screw 250 in the screwed hole, is used for frequency tuning.Cover plate 240 materials are metal or nonmetal and surface metalation, and for improving conductance, the surface can be silver-plated, generally link to each other the shielding electromagnetic energy with cavity by screw.
For the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. dielectric filter, comprise cavity (210) and dielectric resonator (220), described dielectric resonator (220) is fixed to described cavity (210), it is characterized in that, described dielectric resonator (220) comprises the Cylindric medium body, the centre has through hole (222), one end face of described Cylindric medium body is provided with end electrode (223) and coupling electrode (224), described end electrode (223) is positioned at described through hole (222) on every side, and described coupling electrode (224) separates with described end electrode (223).
2. dielectric filter according to claim 1 is characterized in that, the outer surface protected seam (225) of described Cylindric medium body, metal level (226) and described end electrode (223), coupling electrode (224) cover; Described protective layer (225) is positioned at the end face of the described end electrode of being provided with of described Cylindric medium body (223), coupling electrode (224).
3. dielectric filter according to claim 2 is characterized in that, described metal level (226) covers the outer surface of described Cylindric medium body, separates with described coupling electrode (224).
4. described dielectric filter according to claim 1, it is characterized in that, described cavity (210) has resonant cavity and is used for dielectric resonator (220) is installed, and described resonant cavity comprises step through-hole, and described dielectric resonator (220) is installed to the step of described step through-hole.
5. dielectric filter according to claim 4 is characterized in that, is communicated with by coupling window (214) between the described resonant cavity.
6. dielectric filter according to claim 4 is characterized in that, the electroplate of described step through-hole.
7. dielectric filter according to claim 1, it is characterized in that, described dielectric filter has cover plate (240), and described cover plate (240) is fastening by screw and described cavity (210), and described cover plate (240) is provided with tuning screw (250) and is used for frequency tuning.
8. dielectric filter according to claim 1 is characterized in that, described end electrode (223) is annular electrode, be looped around described through hole around.
9. the described dielectric filter of any one in 8 according to claim 1 is characterized in that described dielectric filter is transverse (TEM) dielectric filter.
10. the described dielectric filter of any one in 8 according to claim 1 is characterized in that described end electrode (223) and coupling electrode (224) form at the surface metalation of dielectric resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380022 CN202871951U (en) | 2012-08-02 | 2012-08-02 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380022 CN202871951U (en) | 2012-08-02 | 2012-08-02 | Dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202871951U true CN202871951U (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220380022 Expired - Lifetime CN202871951U (en) | 2012-08-02 | 2012-08-02 | Dielectric filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202871951U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760923A (en) * | 2012-08-02 | 2012-10-31 | 深圳市国人射频通信有限公司 | Medium filter |
| CN110224206A (en) * | 2013-06-04 | 2019-09-10 | 华为技术有限公司 | Dielectric resonator, dielectric filter, transceiver and base station using it |
| WO2021102852A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Dielectric filter and communication device |
-
2012
- 2012-08-02 CN CN 201220380022 patent/CN202871951U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760923A (en) * | 2012-08-02 | 2012-10-31 | 深圳市国人射频通信有限公司 | Medium filter |
| CN102760923B (en) * | 2012-08-02 | 2015-04-29 | 深圳市国人射频通信有限公司 | Medium filter |
| CN110224206A (en) * | 2013-06-04 | 2019-09-10 | 华为技术有限公司 | Dielectric resonator, dielectric filter, transceiver and base station using it |
| US11018405B2 (en) | 2013-06-04 | 2021-05-25 | Huawei Technologies Co., Ltd. | Dielectric resonator, dielectric filter using dielectric resonator, transceiver, and base station |
| WO2021102852A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Dielectric filter and communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 5th floor, building 1, Guoren science and Technology Park, the intersection of Jinxiu middle road and Cuijing Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Guoren Technology Co.,Ltd. Address before: 518000. B building 1F, three national building, science and technology, Shizhong District, Nanshan District hi tech Zone, Guangdong, Shenzhen Patentee before: SHENZHEN GRENTECH RF COMMUNICATION Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |