CN2598164Y - Electromagnetic coupling structure for coaxial cavity resonator - Google Patents
Electromagnetic coupling structure for coaxial cavity resonator Download PDFInfo
- Publication number
- CN2598164Y CN2598164Y CNU032193645U CN03219364U CN2598164Y CN 2598164 Y CN2598164 Y CN 2598164Y CN U032193645 U CNU032193645 U CN U032193645U CN 03219364 U CN03219364 U CN 03219364U CN 2598164 Y CN2598164 Y CN 2598164Y
- Authority
- CN
- China
- Prior art keywords
- tuning
- coupling
- disk
- window
- coaxial
- Prior art date
- 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
Links
Images
Abstract
The utility model provides an electromagnetic coupling structure between the coaxial cavity resonators. A coupling window is opened at the separated wall between the two adjacent coaxial cavities which are separately placed with resonators; a coupling turning screw enters the coupling window from outside. The utility model is characterized in that: the head of the turning screw which enters the coupling window is provided with a turning round disk which consists of a best electric conductor or a disk which is plated with a best electric conductor on surface, when the thickness of the disk is greatly increased, the plate can form a cylinder structure, so as to become a cylinder returning end. The utility model is used for the indoor distributing system mixer in the mobile communication network, can well solve the electromagnetic coupling problem which causes the double increase of the width of the filter band, so that the coaxial cavity resonator do not generate other side-effects at the same time of increasing coupling amount.
Description
Technical field
The utility model relates to radio frequency and the microwave filter in the wireless communication field, more specifically says so based on the electromagnetic coupled structure in the filter of coaxial cavity resonator.Utilize coupling tuning structure provided by the utility model, can significantly increase the electromagnetic coupled amount between coaxial cavity and the tuning range of coupling amount, thus the filtering of easier realization ultra broadband.
Background technology
10 years of past are 10 years of wireless mobile telecommunication technology develop rapidly, especially in China.Indispensable a kind of device during filter is built as wireless mobile communications, its performance index are also more and more challenging.On this, because the Frequency Distribution of China Mobile has certain particularity, the filter that many times needs some can cover several frequency ranges, this just has higher requirement to the design of product.
The frequency range of China Mobile has CDMA (825MHz-880MHz) at present, GSM (890MHz-960MHz), DCS (1710MHz-1880MHz), and the 3G frequency range systems such as (1920MHz-2170MHz) that announces recently.When each system worked independently, its whole frequency is divided into and transmits and receives two frequency ranges, and was just passable as long as the bandwidth of employed filter satisfies these two frequency ranges.Even the performance requirement of filter is higher, internal structure more complicated (as containing cross-couplings etc.) also all realizes than being easier to, and does not have the not enough problem of coupling amount.
Yet because the natural weakness of radio communication, signal often is subjected to stopping of building and produces in a lot of dead angles, especially some buildings this phenomenon in indoor distribution will be more serious.In order to overcome this difficulty, indoor distributed system is widely used in indoor expansion as entire wireless communication system.But if need a cover indoor distributed system to arrange by frequency band, that will have a plurality of indoor distributed systems to exist simultaneously could thoroughly to deal with problems.Such scheme had both been destroyed the outward appearance of interior of building, increased a lot of costs again.Thereby the notion of mixer is widely adopted.
So-called mixer lumps together two or more frequency ranges exactly, enjoys an indoor distributed system jointly.The problem of Chan Shenging is exactly that the bandwidth of filter/duplexer is multiplied therefrom, especially at the 3G primary band, transmits and receives the bandwidth of having only 60MHz (2.9%) originally, and has just become 250MHz (12.2%) now.This has just brought a lot of extra difficulties for the design of filter/duplexer.This difficulty is embodied in following two aspects:
The firstth: as shown in Figure 1, two coaxial cavity resonators are coupled together by a marginal window.It is big more that window is opened, and it is strong more to be coupled.For the filter that is generally less than 10% bandwidth, there is not any problem in such structure.By enough big (just identical during maximum) that window is opened with the width of cavity outer conductor, add the effect of coupling tuning screw, can get a desired effect.When bandwidth greater than 10% the time, just might not reach expected effect, or tuning screw enter very dark, down to causing very much tuning sensitivity to make the performance of filter instability too greatly near cavity bottom.
The secondth: Fig. 2 provides a kind of common cavity coupled structure.Cavity (I) 4 and cavity (II) 5 are coupled together by coupling window (I) 7, and cavity (II) 5 and cavity (III) 6 then are coupled by coupling window (II) 8.Cavity (I) 4 and cavity (III) 6 should not have coupling, or have only very little coupling and can ignore.When coupling window (I) 7 and coupling window (II) 8 are constantly expanded, cavity (I) 4 and (III) the coupling amount between 6 just can't ignore again.This has just brought difficulty can't reach the performance of expection for Filter Design with realizing.
In the prior art, coaxial cavity filter (claiming comb filter again) is present the most general a kind of filter construction aspect the base station of mobile communication and repeater.As the expansion of mobile radio communication, the mixer of indoor distributed system adopts this kind structure too.Common two cavitys are to be coupled by a window of opening, and as shown in Figure 3, the coupling amount can be carried out tuning by a screw 10 that is fixed on the cover plate 9 within the specific limits.The window of being opened 1 is big more, and the coupling between cavity is just big more, and it is dark more that while tuning screw 10 enters window 1, and the coupling between cavity is also big more.When the wall of isolating two cavitys is all opened, and when making the termination of tuning screw 10 almost touch cavity bottom, it is maximum that the coupling amount will reach.Certainly, increase the diameter of tuning screw 10, also can play the effect that increases coupling.But in the middle of practical application, coupling window 1 does not wish to reach the limit, because this might introduce unnecessary coupling; And that tuning screw 10 does not wish to be transferred to yet is the darkest, because this can reduce the reliability of performance of filter; The diameter of tuning screw is not wished different with other tuning screws yet, because this inconvenience can bring actual debugging the time, may bring the trouble of size aspect simultaneously yet.How could not only increase the coupling amount but also above three kinds of situations do not occur? problem that the utility model will answer that Here it is.
The utility model is exactly in order to solve above because being multiplied of filter bandwidht makes its design and realize taking place difficulty to put forward.
Summary of the invention
For achieving the above object, the technical solution adopted in the utility model is: the electromagnetic coupled structure between a kind of coaxial cavity resonator, on the dividing wall between two adjacent coaxial cavities of placing resonator respectively, offer coupling window, one coupling tuning screw stretches into this coupling window from the outside, different is: the tuning screw head that gos deep in the window is provided with a tuning disk, and this tuning disk is made of the disk body that good conductor of electricity or surface are coated with good conductive layer.This tuning disk can greatly strengthen between adjacent two coaxial cavity resonators and is coupled.
Related content in the technique scheme and being explained as follows:
1, in the such scheme, described " coaxial cavity " also is called coaxial cavity, is a kind of coaxial configuration that adopts existing coaxial art designs, and this cavity constitutes a shielding cavity by outer conductor, chamber coaxial arrangement one inner wire.
2, the electromagnetic coupled structure between this programme coaxial cavity resonator is meant a kind of coupled structure between two adjacent coaxial cavity resonators, wherein, comprises two cavity coupled structures, three cavity coupled structures, even the coupled structure between the multi-cavity body more.
3, in the such scheme, described tuning disk must be the favorable conductive material, as fine copper etc., or at the other materials electroplate.
4, in the such scheme, when the thickness of described tuning disk increases greatly, develop into cylindrical structure, thereby become the tuning termination of a cylinder.
5, in the such scheme, adopt between described tuning disk and the tuning screw seamlessly fixedly to be electrically connected, to reach best conductive effect.But, do not get rid of the structure of non-conductive connection, adopt non-conductive fixed connection structure between promptly tuning disk and the tuning screw.
6, in the such scheme, described two coaxial cavities are made of adjacent two uncovered cavitys and cover plate amalgamation, and the bottom of cavity also can be reached in certain position in the middle of window is down reached by cavity dividing wall top always always.The width of window can increase always, and until identical with the width of cavity, the width of window is less than or equal to housing width greater than tuning disk diameter generally speaking.
The utility model operation principle is: the end of going deep into window at tuning screw is provided with a tuning disk, strengthen between adjacent two coaxial cavity resonators with this tuning disk and to be coupled, can solve preferably like this because of being multiplied of filter bandwidht, and Solution of Electromagnetic Field Penetration Problems such as the window aperture of bringing, reliability and stability.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1, the utility model is provided with tuning disk in the termination that tuning screw gos deep into window can significantly increase between adjacent two coaxial cavity resonators and be coupled, the needs that are multiplied with the adaptive filter bandwidth.
2, the utility model is provided with tuning disk in the termination that tuning screw gos deep into window can significantly increase the tuning range that is coupled between coaxial cavity, solved preferably that filter bandwidht is multiplied and window aperture and tuning range between contradiction aspect the coupling reliability and stability.
3, the utility model obviously improves in the filter because of the too big unnecessary cross-couplings of bringing that is coupled.
Description of drawings
In the above accompanying drawing: 1, coupling window; 2, outer conductor; 3, inner wire; 4, cavity (I); 5, cavity (II); 6, cavity (III); 7, coupling window (I); 8, coupling window (II); 9, cover plate; 10, tuning screw; 11, nut; 12, tuning disk; 13, tuning cylinder.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: referring to accompanying drawing 1 and shown in Figure 4, electromagnetic coupled structure between a kind of coaxial cavity resonator, similar with common coupled structure, on the dividing wall between two adjacent coaxial cavity (I) 4 and the cavity (II) 5, offer coupling window 1, one coupling tuning screw 10 stretches into this coupling window 1 from the cover plate 9 at outer conductor 2 tops, different is, tuning screw 10 heads that go deep in the window 1 are provided with a tuning disk 12, and this tuning disk 12 is made of the disk body that good conductor of electricity or surface are coated with good conductive layer.Tuning generally speaking disk 12 is made and at its electroplate by red copper or with brass.Tuning disk 12 generally with between the tuning screw 10 adopts seamless the connection, to reach best conductive effect.But, do not get rid of the structure of non-conductive connection.The radius of disk 12 can depend on the needs.Radius is big more, and the coupling amount is just big more.The thickness of disk 12 is another parameters that can increase coupling, and when the thickness of disk 12 was increased, tuning disk 12 developed into cylindrical structure, thereby becomes a tuning cylinder 13 terminations, shown in accompanying drawing 5.From increasing the angle of coupling amount, the raising coupling that tuning cylinder 13 can be bigger, but because its scope that moves up and down is restricted, the tuning range of coupling amount has certain restriction.And when adopting tuning disk 12, though it is big not as tuning cylinder 13 terminations to reach maximum coupling amount, the tuning range of its coupling amount is then bigger.Described window 1 is certain position in the middle of down always being reached by the top of cavity, also can reach the bottom of cavity always.The width of window 1 can increase always, and until identical with the width of cavity, but in the practical application, coupling window 1 does not wish to reach the limit, because this might introduce unnecessary coupling.The termination of this programme in tuning screw 10 gos deep into window 1 is provided with a tuning disk 12 and can greatly strengthens between adjacent two coaxial cavity resonators and be coupled, can solve preferably simultaneously because of being multiplied of filter bandwidht, and the Solution of Electromagnetic Field Penetration Problems of bringing.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection range of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (5)
1, the electromagnetic coupled structure between a kind of coaxial cavity resonator, on the dividing wall between two adjacent coaxial cavities of placing resonator respectively, offer coupling window, one coupling tuning screw stretches into this coupling window from the outside, it is characterized in that: the tuning screw head that gos deep in the window is provided with a tuning disk, and this tuning disk is made of the disk body that good conductor of electricity or surface are coated with good conductive layer.
2, the electromagnetic coupled structure between coaxial cavity resonator according to claim 1 is characterized in that: described tuning disk can develop into cylindrical structure, thereby becomes the tuning termination of a cylinder.
3, the electromagnetic coupled structure between coaxial cavity resonator according to claim 1 is characterized in that: adopt between described tuning disk and the tuning screw seamlessly fixedly to be electrically connected.
4, the electromagnetic coupled structure between coaxial cavity resonator according to claim 1 is characterized in that: adopt non-conductive fixed connection structure between described tuning disk and the tuning screw.
5, the electromagnetic coupled structure between coaxial cavity resonator according to claim 1, it is characterized in that: described two coaxial cavities are made of adjacent two uncovered cavitys and cover plate amalgamation, window is down offered by cavity dividing wall top, the width of window is less than or equal to housing width greater than tuning disk diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032193645U CN2598164Y (en) | 2003-01-13 | 2003-01-13 | Electromagnetic coupling structure for coaxial cavity resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032193645U CN2598164Y (en) | 2003-01-13 | 2003-01-13 | Electromagnetic coupling structure for coaxial cavity resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2598164Y true CN2598164Y (en) | 2004-01-07 |
Family
ID=34161198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032193645U Expired - Fee Related CN2598164Y (en) | 2003-01-13 | 2003-01-13 | Electromagnetic coupling structure for coaxial cavity resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2598164Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714686A (en) * | 2009-12-21 | 2010-05-26 | 成都赛纳赛德科技有限公司 | Ultra wide band cavity filter |
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102176526A (en) * | 2010-12-31 | 2011-09-07 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102361117A (en) * | 2011-09-29 | 2012-02-22 | 武汉虹信通信技术有限责任公司 | Capacitive cross coupling flying bar and coaxial cavity resonator thereof |
| CN101630768B (en) * | 2009-08-11 | 2013-02-13 | 京信通信系统（中国）有限公司 | Cavity medium filter |
| CN104241752A (en) * | 2014-09-10 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Dielectric filter |
| CN111384496A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384521A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
| CN111384511A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
| CN111384488A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384564A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384575A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
| CN111384567A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384565A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384491A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
-
2003
- 2003-01-13 CN CNU032193645U patent/CN2598164Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630768B (en) * | 2009-08-11 | 2013-02-13 | 京信通信系统（中国）有限公司 | Cavity medium filter |
| CN101714686A (en) * | 2009-12-21 | 2010-05-26 | 成都赛纳赛德科技有限公司 | Ultra wide band cavity filter |
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102176526A (en) * | 2010-12-31 | 2011-09-07 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102176526B (en) * | 2010-12-31 | 2013-08-14 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102361117A (en) * | 2011-09-29 | 2012-02-22 | 武汉虹信通信技术有限责任公司 | Capacitive cross coupling flying bar and coaxial cavity resonator thereof |
| CN102361117B (en) * | 2011-09-29 | 2014-04-02 | 武汉虹信通信技术有限责任公司 | Capacitive cross coupling flying bar and coaxial cavity resonator thereof |
| CN104241752B (en) * | 2014-09-10 | 2016-08-24 | 江苏贝孚德通讯科技股份有限公司 | A kind of dielectric filter |
| CN104241752A (en) * | 2014-09-10 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Dielectric filter |
| CN111384496A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384488A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384564A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384567A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384565A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384491A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter and communication equipment |
| CN111384521A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
| CN111384511A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
| CN111384575A (en) * | 2018-12-31 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter, communication equipment, dielectric resonator and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2598164Y (en) | Electromagnetic coupling structure for coaxial cavity resonator | |
| CN203377357U (en) | A miniaturized built-in micro-strip combiner for an LTE base station antenna | |
| CN2877054Y (en) | Step cavity directional coupler | |
| CN107946706B (en) | Double frequency band-pass filter and its design method based on micro-strip and substrate integration wave-guide | |
| CN2879537Y (en) | Filter reinforced coupling structure | |
| CN109273806A (en) | Miniaturization low-pass filter based on hexagonal T-type resonator | |
| CN2924808Y (en) | WLAN single-face two-frequency PCB antenna | |
| CN105514544B (en) | Compact three mode filter of screw type of plane | |
| CN201204256Y (en) | Multi-stopband ultra-wideband antenna for short distance wireless communication and data transmission | |
| CN114744382B (en) | Waveguide transmission channel turning structure | |
| CN1949588A (en) | Dielectric device | |
| CN103151610A (en) | Small unsymmetrical plane ultra-wideband antenna | |
| CN203180064U (en) | Mini-sized asymmetric plane ultra-wideband antenna | |
| CN116130915A (en) | Multi-passband balance filter and power divider based on EBG structure | |
| CN202839916U (en) | Coaxial cavity filter | |
| CN202084620U (en) | Novel band stop structure combiner | |
| CN112563743A (en) | Novel mobile phone antenna | |
| CN107171044A (en) | A kind of hybrid coupled micro-strip duplexer | |
| CN208753482U (en) | A kind of cavity bandstop filter that performance is stable | |
| CN109638440B (en) | Metamaterial-based 5G communication miniaturized broadband MIMO antenna | |
| CN202712383U (en) | Dual-pass band ultra-wideband filter based on stepped impedance resonator | |
| CN1159940C (en) | Composite medium filter device and communication equipment including said device | |
| CN200997431Y (en) | Sensitive coupling structure between coaxial cavity resonater and filter therewith | |
| CN112086717A (en) | Capacitive patch loaded dual-mode substrate integrated waveguide band-pass filter | |
| CN101557033B (en) | Band-notched UWB antenna with reflection zero |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |