CN202004128U - Hybrid TM mode medium filter - Google Patents
Hybrid TM mode medium filter Download PDFInfo
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- CN202004128U CN202004128U CN 201120041743 CN201120041743U CN202004128U CN 202004128 U CN202004128 U CN 202004128U CN 201120041743 CN201120041743 CN 201120041743 CN 201120041743 U CN201120041743 U CN 201120041743U CN 202004128 U CN202004128 U CN 202004128U
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- resonant rod
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- medium
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Abstract
The utility model discloses a hybrid TM mode medium filter, which comprises cover plates (1), a cavity shell (2), radio frequency connectors (3), metal resonant rods (4) and a medium ceramic resonant rod (5), wherein the two ends in the cavity shell (2) are provided with two metal resonant rods (4); at least one medium ceramic resonant rod (5) is arranged between the metal resonant rods (4); the medium ceramic resonant rod (5) is welded on a mounting base (9); the top of the medium ceramic resonant rod (5) is provided with a top medium loading disc (12); the edges (13) of the top medium loading disc (12) are fillets; and the cover plates (1) above each metal resonant rod (4) and the medium ceramic resonant rod (5) are provided with silver-plated screws (10). The hybrid TM mode medium filter has the advantages of low insertion loss, high quality factors, wide bandwidth, low occupied height, small volume and the like.
Description
Technical field
The utility model relates to a kind of hybrid-type TM mould dielectric filter.
Background technology
Along with coming into operation of 3G mobile communication network service, the research and development of following 3.5G, 4G mobile communication technology are also carried out in full preparation, as the transceiving filter of mobile base station radio-frequency front-end Primary Component, and its performance
Quality directly influence the quality of communication.
Traditional metal coaxial resonant cavity filter can't satisfy the needs of technical development in the future, and volume is little, the insertion loss is low and bear characteristics such as power is big owing to having for dielectric filter, more and more obtains the attention of Radio Frequency Engineer.Advantage such as TM mould dielectric resonant chamber has the quality factor height, loss is little and volume is little, but there be the problem of higher mode near signal passband, and the mode of resonance of metal coaxial resonant cavity is the TEM mould, its loss is medium, but its nearest higher mode can be controlled beyond three times or the four times of centre frequencies easily.
Traditional resonant cavity filter has following three kinds:
1, metal coaxial resonant cavity filter as shown in Figure 1, the maximum characteristics of this filter are that the resonant rod of each coaxial resonant cavity inside is silver-plated metal resonant rod, this type of is simple in structure, filter is arranged conveniently, the relative bandwidth maximum can reach more than 20%, and be easy to construct accurate elliptic function filtering waveform, the high-order harmonic wave of himself is generally more than 3 times and 4 times, and is widely used in mobile communication base station, repeater and the indoor overlay network.But because the quality factor of metal coaxial resonant cavity filter are generally between 3000～4500, increase along with filter order, it inserts also increase thereupon of loss, and this moment, the volume of filter was bigger, can't satisfy the following new requirement of base station filter of making rapid progress.
2, microwave-medium ceramics dielectric resonant chamber filter as shown in Figure 2, the resonant rod material in the resonant cavity is a microwave-medium ceramics all, utilizes the high-k of microwave-medium ceramics, low loss characteristic constructs the filter of a class low insertion loss.The shortcoming of the resonant cavity filter of microwave-medium ceramics resonant rod class is: the nearest high-rder mode of the full dielectric resonant chamber filter of (1) TM mould is generally in 2 subharmonic; (2) owing to the special input and output excitation rings structure of the full dielectric resonant chamber filter of TM mould, its relative bandwidth generally in 2%～3%, can't be made broadband filter.
3, conventional hybrid formula resonant cavity filter as shown in Figure 3, the input and output resonant cavity adopts the coaxial metal resonant cavity, all the other resonant cavitys adopt the microwave-medium ceramics dielectric resonant chamber, utilize the Distribution of Magnetic Field similitude of both modes of resonance, two kinds of resonant cavitys are easy to form the novel mixed mode dielectric filter of a class, and combine two kinds of resonant cavitys advantage separately, and loss is low, high-rder mode is far away as inserting, simple in structure, easy to use etc.But in traditional mixing TM mould dielectric filter, because the microwave-medium ceramics resonant rod is even cylinder, the height of filter is all very high, can't satisfy the requirement of present communication base station filter miniaturization.
The utility model content
The purpose of this utility model is to overcome the deficiency of existing resonant cavity filter, provide a kind of have insert that loss is low, the resonant cavity filter of broader bandwidth, characteristics such as the height that takies is low and volume is little.
The purpose of this utility model is achieved through the following technical solutions: a kind of hybrid-type TM mould dielectric filter, it comprises cover plate, the chamber shell, radio frequency connector, metal resonant rod and media ceramic resonant rod, cover plate is fixed on the shell of chamber by the coiled hair screw assemblies, two ends are provided with two metal resonant rods in the shell of chamber, at least be provided with a media ceramic resonant rod between the metal resonant rod, radio frequency connector is installed in two terminations of chamber shell, the metal resonant rod is connected with radio frequency connector by the excitation line, the metal resonant rod is fixed on the inwall bottom of chamber shell by the countersunk head holding screw, the media ceramic resonant rod is welded on the mounting base, mounting base is fixed on the inwall bottom of chamber shell, the top of media ceramic resonant rod is provided with the top medium loading disc, the seamed edge of top medium loading disc is a rounding, the cover plate of the top of each metal resonant rod and media ceramic resonant rod is provided with silver-plated screw, is with nut on the silver-plated screw.
Media ceramic resonant rod described in the utility model is the microwave-medium ceramics resonant rod.
The beneficial effects of the utility model comprise:
(1) compares with the metal coaxial resonant cavity filter of standard, under the prerequisite that physical dimension remains unchanged, the quality factor of the TM mould dielectric filter of mixed mode of the present invention will exceed more than 50%, so the insertion loss of this type of hybrid TM mould dielectric filter reduces more than 1/3rd;
(2) compare with the metal coaxial resonant cavity filter of standard, under the prerequisite that technical indicator remains unchanged, the volume of the TM mould dielectric filter of mixed mode of the present invention will reduce over half;
(3) input of the TM mould dielectric filter of mixed mode of the present invention, output cavity adopt the metal coaxial resonant cavity, and all the other use the microwave-medium ceramics resonant cavity, and its relative bandwidth is increased to more than 10%;
(4) compare with traditional hybrid resonant cavity filter, the height of the TM mould dielectric filter of mixed mode of the present invention is reduced effectively;
(5) the utility model can promote the use of in the middle of similar the miniaturization TM mould dielectric duplexer and multiplexer structure easily.
Description of drawings
Fig. 1 metal coaxial resonant cavity Filter Structures schematic diagram
The structural representation of Fig. 2 microwave-medium ceramics dielectric resonant chamber filter
The structural representation of Fig. 3 conventional hybrid formula resonant cavity filter
The structural representation of the TM mould dielectric filter of Fig. 4 mixed mode
Among the figure, 1-cover plate, 2-chamber shell, 3-radio frequency connector, 4-metal resonant rod, 5-microwave-medium ceramics resonant rod, 6-coiled hair screw assemblies, 7-encourages line, 8-countersunk head holding screw, 9-mounting base, the silver-plated screw of 10-, 11-nut, 12-top medium loading disc, 13-seamed edge.
Embodiment
Further describe the technical solution of the utility model below in conjunction with accompanying drawing: as shown in Figure 4, a kind of hybrid-type TM mould dielectric filter, it comprises cover plate 1, chamber shell 2, radio frequency connector 3, metal resonant rod 4 and microwave-medium ceramics resonant rod 5, cover plate 1 all adopts silver-plated material with chamber shell 2, cover plate 1 is fixed on the chamber shell 2 by coiled hair screw assemblies 6, the input at chamber shell 2 two ends, respectively be provided with a silver-plated metal resonant rod 4 in the output cavity, respectively be provided with a microwave-medium ceramics resonant rod 5 in all the other resonant cavitys, radio frequency connector 3 is installed in two terminations of chamber shell 2, silver-plated metal resonant rod 4 is connected with radio frequency connector 3 by excitation line 7, metal resonant rod 4 is by the inwall bottom of countersunk head holding screw 8 fixed cavities 2, mounting base 9 is fixed on the inwall bottom of chamber shell 2, microwave-medium ceramics resonant rod 5 is welded on the mounting base 9, can bear harsh ambient temperature and impact, guarantee reliability of structure; The input of filter, output cavity adopt silver-plated metal resonant rod 4, and the relative bandwidth of dielectric filter is increased to more than 10%; The use of microwave-medium ceramics resonant rod 5 in all the other resonant cavitys makes that under the prerequisite that physical dimension remains unchanged the quality factor of filter will exceed more than 50%, therefore inserts loss and has reduced more than 1/3rd; The top of microwave-medium ceramics resonant rod 5 is provided with top medium loading disc 12, and the loading disc structure can reduce the height of filter effectively under the prerequisite of loss that guarantees resonator and harmonic characterisitic; The seamed edge 13 of top medium loading disc 12 is a rounding, further guarantees the power capacity of miniaturization TM mould dielectric filter; The cover plate 1 of the top of each metal resonant rod 4 and media ceramic resonant rod 5 is provided with silver-plated screw 10, is socketed with nut 11 on the silver-plated screw 10, rotates silver-plated screw 10 and can regulate distance between silver-plated screw 10 and the resonant rod; The utility model can promote the use of in the middle of similar the miniaturization TM mould dielectric duplexer and multiplexer structure easily.
Claims (2)
1. hybrid-type TM mould dielectric filter, it is characterized in that: it comprises cover plate (1), chamber shell (2), radio frequency connector (3), metal resonant rod (4) and media ceramic resonant rod (5), cover plate (1) is fixed on the chamber shell (2) by coiled hair screw assemblies (6), the interior two ends of chamber shell (2) are provided with two metal resonant rods (4), at least be provided with a media ceramic resonant rod (5) between the metal resonant rod (4), radio frequency connector (3) is installed in two terminations of chamber shell (2), metal resonant rod (4) is connected with radio frequency connector (3) by excitation line (7), metal resonant rod (4) is fixed on the inwall bottom of chamber shell (2) by countersunk head holding screw (8), media ceramic resonant rod (5) is welded on the mounting base (9), mounting base (9) is fixed on the inwall bottom of chamber shell (2), the top of media ceramic resonant rod (5) is provided with top medium loading disc (12), the seamed edge (13) of top medium loading disc (12) is a rounding, the cover plate (1) of the top of each metal resonant rod (4) and media ceramic resonant rod (5) is provided with silver-plated screw (10), is with nut (11) on the silver-plated screw (10).
2. a kind of hybrid-type TM mould dielectric filter according to claim 1, it is characterized in that: described media ceramic resonant rod (5) is the microwave-medium ceramics resonant rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120041743 CN202004128U (en) | 2011-02-18 | 2011-02-18 | Hybrid TM mode medium filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120041743 CN202004128U (en) | 2011-02-18 | 2011-02-18 | Hybrid TM mode medium filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004128U true CN202004128U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120041743 Expired - Fee Related CN202004128U (en) | 2011-02-18 | 2011-02-18 | Hybrid TM mode medium filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202004128U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637928A (en) * | 2012-04-13 | 2012-08-15 | 深圳光启创新技术有限公司 | Dielectric filter |
| CN103107392A (en) * | 2013-02-07 | 2013-05-15 | 江苏贝孚德通讯科技股份有限公司 | Mixed-mode radio frequency/microwave band elimination filter |
| CN103117429A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization comb filter |
| CN103117433A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
-
2011
- 2011-02-18 CN CN 201120041743 patent/CN202004128U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117429A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization comb filter |
| CN103117433A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
| CN103117433B (en) * | 2011-11-17 | 2015-04-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
| CN102637928A (en) * | 2012-04-13 | 2012-08-15 | 深圳光启创新技术有限公司 | Dielectric filter |
| CN102637928B (en) * | 2012-04-13 | 2015-05-27 | 深圳光启创新技术有限公司 | Dielectric filter |
| CN103107392A (en) * | 2013-02-07 | 2013-05-15 | 江苏贝孚德通讯科技股份有限公司 | Mixed-mode radio frequency/microwave band elimination filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hybrid TM (Transverse Magnetic) mode dielectric filter Effective date of registration: 20130910 Granted publication date: 20111005 Pledgee: Bank of Chengdu science and technology branch of Limited by Share Ltd Pledgor: Chengdu Tiger Microwave Technology Co., Ltd. Registration number: 2013510000003 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150707 Granted publication date: 20111005 Pledgee: Bank of Chengdu science and technology branch of Limited by Share Ltd Pledgor: Chengdu Tiger Microwave Technology Co., Ltd. Registration number: 2013510000003 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20150218 |
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| EXPY | Termination of patent right or utility model |