CN201966312U - TM (Transverse Magnetic) mode dielectric filter - Google Patents
TM (Transverse Magnetic) mode dielectric filter Download PDFInfo
- Publication number
- CN201966312U CN201966312U CN 201020643211 CN201020643211U CN201966312U CN 201966312 U CN201966312 U CN 201966312U CN 201020643211 CN201020643211 CN 201020643211 CN 201020643211 U CN201020643211 U CN 201020643211U CN 201966312 U CN201966312 U CN 201966312U
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- mould dielectric
- magnesium
- screw
- dielectric resonator
- mould
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Abstract
The utility model relates to a TM (Transverse Magnetic) mode dielectric filter comprising a metal resonant cavity, a cover plate, a tuning screw and a TM mode dielectric resonator, wherein the TM mode dielectric resonator is fixed in the metal resonant cavity through a blot. The TM mode dielectric filter is characterized in that a screw rod part of the bolt is screwed on the bottom or the side wall of the metal resonant cavity after passing through a locating hole of the TM mode dielectric resonator and is not in contact with the wall of the locating hole, and a transition washer for separating the bolt and the TM mode dielectric resonator is arranged between the head of the bolt and the end surface of the locating hole of the TM mode dielectric resonator. The transition washer with a high Q value and a low dielectric constant is adopted to separate the TM mode dielectric resonator and the blot so that the head of the bolt is in contact with a material with the high Q value and the low dielectric constant, and the reduction of the Q value of the material cannot influence the Q value of the entire TM mode dielectric resonator, therefore, the problem that the TM mode dielectric resonator is fixed by using a metal bolt is solved.
Description
Technical field
The utility model belongs to passive antenna feeder device, is specifically related to TM mould dielectric filter.
Background technology
For a long time, filter plays an important role in the processing of electronic signal always, and it has signal that filters frequency of utilization and the function that suppresses interference signal.Fast development along with microwave wireless communication, the resource of frequency range in short supply, performance and volume to filter have proposed more and more higher requirement, and traditional wire chamber filter can not satisfy these requirements, so want to improve the property of ripple device and reduce its volume by TM mould dielectric resonator.
Traditional TM mould dielectric filter (referring to Fig. 1), the installation of its resonator all are by behind the silver on resonator one end burns, and are installed to filter (duplexer) lining with the method for wire chamber by welding again.But because the coefficient of expansion of ceramic resonator differs greatly with metal, the reliability of this installation method is very poor, after high low temperature variation, the phenomenon that resonator will occur rupturing, filter (duplexer) was lost efficacy, therefore, above-mentioned this TM mould dielectric filter (duplexer) is difficult to promote on market.
The another kind of installation method of resonator is exactly directly to fix TM mould dielectric resonator by metallic screw, but because the introducing of metallic screw, the Q value of TM mould medium is sharply descended, do not have advantage with common metal chamber ratio, even be inferior to the common metal chamber, so can't use yet.Also has a kind of fixing means at last, just adopt plastic screw to fix TM mould dielectric resonator, because the loss of general plastics is big, insufficient strength, can cause that also the Q value descends and the not good situation of frequency stability, this also determined its can't be on market large-area applications.
The utility model content
The purpose of this utility model is in order to solve the deficiency that the above-mentioned background technology exists, a kind of dielectric filter that can directly fix TM mould dielectric resonator with metallic screw is proposed, its Q value that can not cause TM mould dielectric resonator is descended, to improve the reliability of TM mould dielectric resonator.
For achieving the above object, the utility model adopts following technical scheme: TM mould dielectric filter, comprise metal resonant cavity, cover plate, tuning screw and TM mould dielectric resonator, described TM mould dielectric resonator by screw in the metal resonant cavity, it is characterized in that, the location hole that the screw mandrel of described screw partly passes TM mould dielectric resonator is tightened on the bottom or sidewall of metal resonant cavity, the screw mandrel part of screw does not contact with above-mentioned location hole hole wall, is provided with the transition packing ring that the two is separated between the location hole end face of the head of described screw and TM mould dielectric resonator.
Preferably, the Q*F value of this transition packing ring is 50000～700000, and dielectric constant is 2～25, and wherein F is frequency (GHz).
In such scheme, the preferred 1.5-5mm of described transition gasket thickness, optimum thickness is 3mm.
In such scheme, described transition packing ring can adopt the high Q dielectric materials of aluminium oxide, zinc silicate, magnesium silicate, niobic acid magnesium, zinc aluminate, aluminium titanium zinc, artificial schellite, calcium zinc tantalum titanium, magnesium barium tungstate, tantalic acid magnesium, barium copper nickel acid yttrium, barium magnesium tungsten titanium, barium zincic acid yttrium, barium zinc-copper acid yttrium niobium, cobalt titanate magnesium, magnesium titanate, magnesium tantalum titanium material or its compound institute level one-tenth.
In such scheme, described TM mould dielectric filter comprises band pass filter, band resistance filter.
The utility model finds a kind of high Q value, and the transition packing ring of low-k directly contacts with TM mould dielectric resonator, and then contact this transition packing ring by metallic screw by it, and TM mould dielectric resonator is fixed.Owing to what touch with screw is high Q value, the material of low-k, and the decline of its Q value can not have influence on the Q value of whole TM mould dielectric resonator, thereby has solved the problem that TM mould dielectric resonator is installed with metallic screw.
The utility model is by after introducing new material and mounting means, make when can directly fix TM mould dielectric resonator with metallic screw, the Q value that can not cause TM mould dielectric resonator descends, thereby has improved the reliability of TM mould dielectric resonator, has given full play to the advantage of TM mould.
Description of drawings
Fig. 1 has typical TM mould dielectric filter resonator fixed structure profile now;
The described TM mould of Fig. 2 present embodiment dielectric filter resonator fixed structure profile.
In the drawings, 1-metal resonant cavity, 2-cover plate, 3-tuning screw, 4-TM mould dielectric resonator, 5-screw, 6-transition packing ring, 7-locking nut.
Embodiment
The described TM mould of present embodiment dielectric filter as shown in Figure 2, comprise metal resonant cavity 1, cover plate 2, tuning screw 3 and TM mould dielectric resonator 4, described TM mould dielectric resonator is fixed in the metal resonant cavity by screw 5, concrete fixed form is: the location hole that the screw mandrel of screw 5 partly passes TM mould dielectric resonator is tightened in the bottom of metal resonant cavity 1, also can be tightened on the sidewall.The screw mandrel part of screw 5 does not contact with above-mentioned location hole hole wall.Be provided with transition packing ring 6 between the location hole upper surface of the head of described screw 5 and TM mould dielectric resonator, the Q*F value of this transition packing ring is 50000～700000, and dielectric constant is 2～25, and wherein F is frequency (GHz).
The preferred 1.5-5mm of transition packing ring 6 thickness, optimum thickness is 3mm.The transition packing ring can adopt aluminium oxide, zinc silicate, magnesium silicate, niobic acid magnesium, zinc aluminate, aluminium titanium zinc, artificial schellite, calcium zinc tantalum titanium, magnesium barium tungstate, tantalic acid magnesium, barium copper nickel acid yttrium, barium magnesium tungsten titanium, barium zincic acid yttrium, barium zinc-copper acid yttrium niobium, cobalt titanate magnesium, magnesium titanate, magnesium tantalum titanium material or its compound integrated high Q dielectric materials make.Present embodiment can extend to other by the TM mould dielectric filter that this mounting means is realized, comprises band pass filter, band resistance filter.
The described cover plate 5 of present embodiment covers on metal resonant cavity 1, and tuning screw 3 usefulness locking nuts 7 are fixed on the cover board, and the position of tuning screw 3 is corresponding with TM mould dielectric resonator 4.
TM mould dielectric filter described in the utility model (duplexer), adopt the transition packing ring 6 of high Q, low-k that TM mould dielectric resonator 4 and screw 5 are separated, what make that screw 5 heads touch is high Q value, the material of low-k, the decline of its Q value can not have influence on the Q value of whole TM mould dielectric resonator, thereby has solved the problem that fixes TM mould dielectric resonator with metallic screw.
Claims (6)
1.TM mould dielectric filter, comprise metal resonant cavity, cover plate, tuning screw and TM mould dielectric resonator, described TM mould dielectric resonator by screw in the metal resonant cavity, it is characterized in that, the location hole that the screw mandrel of described screw partly passes TM mould dielectric resonator is tightened on the bottom or sidewall of metal resonant cavity, the screw mandrel part of screw does not contact with above-mentioned location hole hole wall, is provided with the transition packing ring that the two is separated between the location hole end face of the head of described screw and TM mould dielectric resonator.
2. TM mould dielectric filter according to claim 1 is characterized in that the Q*F value of described transition packing ring is 50000～700000, and dielectric constant is 2～25, and wherein F is frequency (GHz).
3. TM mould dielectric filter according to claim 2 is characterized in that described transition gasket thickness is 1.5-5mm.
4. TM mould dielectric filter according to claim 2 is characterized in that described transition gasket thickness is 3mm.
5. TM mould dielectric filter according to claim 2, it is characterized in that, described transition packing ring adopt aluminium oxide, zinc silicate, magnesium silicate, niobic acid magnesium, zinc aluminate, aluminium titanium zinc, artificial schellite, calcium zinc tantalum titanium, magnesium barium tungstate, tantalic acid magnesium, barium copper nickel acid yttrium, barium magnesium tungsten titanium, barium zincic acid yttrium, barium zinc-copper acid yttrium niobium, cobalt titanate magnesium, magnesium titanate, magnesium tantalum titanium material or its compound integrated high Q dielectric materials.
6. according at least one described TM mould dielectric filter among the claim 1-5, it is characterized in that described TM mould dielectric filter comprises band pass filter, band resistance filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020643211 CN201966312U (en) | 2010-12-06 | 2010-12-06 | TM (Transverse Magnetic) mode dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020643211 CN201966312U (en) | 2010-12-06 | 2010-12-06 | TM (Transverse Magnetic) mode dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966312U true CN201966312U (en) | 2011-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020643211 Expired - Lifetime CN201966312U (en) | 2010-12-06 | 2010-12-06 | TM (Transverse Magnetic) mode dielectric filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN201966312U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044730A (en) * | 2010-12-06 | 2011-05-04 | 武汉凡谷电子技术股份有限公司 | Transverse magnetic (TM) mode dielectric filter |
| GB2499725A (en) * | 2012-02-24 | 2013-08-28 | Radio Design Ltd | Cavity filter with dielectric rod attached to a wall of the cavity housing via securing means |
| CN107331935A (en) * | 2015-01-13 | 2017-11-07 | 日本电业工作株式会社 | Resonator and wave filter |
| CN109216839A (en) * | 2018-09-28 | 2019-01-15 | 西南应用磁学研究所 | A kind of interdigital ceramic tube medium cavity body filter of novel miniaturization |
-
2010
- 2010-12-06 CN CN 201020643211 patent/CN201966312U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044730A (en) * | 2010-12-06 | 2011-05-04 | 武汉凡谷电子技术股份有限公司 | Transverse magnetic (TM) mode dielectric filter |
| CN102044730B (en) * | 2010-12-06 | 2014-11-26 | 武汉凡谷电子技术股份有限公司 | Transverse magnetic (TM) mode dielectric filter |
| GB2499725A (en) * | 2012-02-24 | 2013-08-28 | Radio Design Ltd | Cavity filter with dielectric rod attached to a wall of the cavity housing via securing means |
| GB2499725B (en) * | 2012-02-24 | 2019-11-13 | Radio Design Ltd | Filter apparatus and method of manufacture thereof |
| CN107331935A (en) * | 2015-01-13 | 2017-11-07 | 日本电业工作株式会社 | Resonator and wave filter |
| CN107331935B (en) * | 2015-01-13 | 2019-11-01 | 日本电业工作株式会社 | Resonator and filter |
| CN109216839A (en) * | 2018-09-28 | 2019-01-15 | 西南应用磁学研究所 | A kind of interdigital ceramic tube medium cavity body filter of novel miniaturization |
| CN109216839B (en) * | 2018-09-28 | 2024-03-22 | 西南应用磁学研究所 | Novel miniaturized interdigital ceramic tube medium cavity filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN FAN GU CERAMIC MATERIALS CO., LTD. Free format text: FORMER OWNER: WUHAN FANGU ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20140930 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430205 WUHAN, HUBEI PROVINCE TO: 430200 WUHAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140930 Address after: 430200, No. two, East Industrial Park, East Lake Development Zone, Hubei, Wuhan Patentee after: WUHAN FINGU CERAMIC MATERIAL CO., LTD. Address before: 430205 Hubei Province, Wuhan city Jiangxia District Guan Feng Lu canglongdao fingu Industrial Park, building 4, floor 2 Patentee before: Wuhan Fingu Electronic Technology Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110907 Effective date of abandoning: 20141126 |
|
| RGAV | Abandon patent right to avoid regrant |