CN108232386A - A kind of cavity body filter of cross coupling structure - Google Patents
A kind of cavity body filter of cross coupling structure Download PDFInfo
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- CN108232386A CN108232386A CN201810178710.1A CN201810178710A CN108232386A CN 108232386 A CN108232386 A CN 108232386A CN 201810178710 A CN201810178710 A CN 201810178710A CN 108232386 A CN108232386 A CN 108232386A
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- cavity
- dielectric resonant
- cross
- metal
- resonator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
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Abstract
The invention discloses a kind of cavity body filters of cross coupling structure, including three chamber cavity body filters and five chamber cavity body filters, it is connected between cavity and cavity, the dielectric resonant chamber separated by dividing wall is equipped in each cavity, medium is provided on resonator and adjusts cover board, input metal port and output metal port are equipped on its a pair of of adjacent media resonator, metal regulating rod is set between other adjacent media resonant cavities；Cross-couplings connector is equipped between non-conterminous two dielectric resonant chambers, connector is U-shaped metal rod, and cavity and dielectric resonant chamber are carried out cross-couplings with metal regulating rod using cross-couplings connector and connected by it.The electric field formed between resonator can be conveniently adjusted by adjusting the positions and dimensions of U-shaped metal rod.The present invention can be good at enhancing Out-of-band rejection, eliminate clutter；Used coupled structure, cheap, processing is simple, convenient for assembling, is suitable for large-scale mass production and applies.
Description
Technical field
The present invention relates to communication fields, and in particular to a kind of cavity body filter and cavity body filter cross coupling structure and base
It stands.
Background technology
Cavity body filter is widely used in wireless communication link circuit node as a kind of signal of communication processing structure part.It is communicating
During system is completed signal transmitting and received, cavity body filter has through special frequency band signal, rejection band external signal
Effect.
As a part for signal of communication processing, wave filter is often placed in inside of base station or antenna end.Base in recent years
In base station transport installation and the requirement of antenna installation, wave filter miniaturization and inexpensive trend are more apparent.To coordinate other letters
Often there are the appearance and size of wave filter in the installation of number processing component, operator certain requirement.
In traditional cavity body filter, a winged bar is set to realize cross-couplings between two resonators.
In the research and practice process to the prior art, it was found by the inventors of the present invention that as the communications industry is used
Broadband it is more and more narrow, the index of product is also increasingly harsher, the cross-coupled manner realized using winged bar, needs repairing repeatedly
Change the height of the length and winged bar of winged bar in the cavity and carry out optimizing index, the length of winged bar should be considered when optimization flies bar again
Consider the height of winged bar, multiple variables are just produced during optimization, this just determines that optimization needs many times while also increases
Add optimization difficulty, be unfavorable for the batch production of product.
Invention content
In order to solve the deficiency of cross-coupled manner in the prior art, the present invention provides a kind of simple coupled structures of three chambers
Cavity body filter.It includes tri- cavitys of A, B, C, and the dielectric resonant chamber separated by dividing wall, resonator are equipped in each cavity
On be provided with medium adjust cover board, on A, C dielectric resonant chamber be equipped with input metal port and output metal port, in AB, BC
Metal regulating rod is set between adjacent media resonant cavity；In two dielectric resonant chambers of AC equipped with input, output metal port
Between be equipped with cross-couplings connector；
The present invention also provides a kind of simple coupled structure cavity body filters of five chambers.It includes five cavitys of A, B, C, D, E,
The dielectric resonant chamber separated by dividing wall is equipped in each cavity, medium is provided on resonator and adjusts cover board, it is humorous in A, E medium
The chamber that shakes is equipped with input metal port and output metal port, and gold is set between AB, BC, CD, DE adjacent media resonant cavity
Belong to regulating rod；Cross-couplings are equipped between two non-conterminous dielectric resonant chambers of AC or BD or AD or BE or CE
Connector is equipped with cross-couplings connector between the AE dielectric resonant chambers equipped with input, output metal port；
The cross-couplings connector is a U-shaped metallic rod, which is fixed on two dielectric resonant chambers
Dividing wall on, both ends length does not have linear relationship, and the U-shaped metallic rod can be horizontal positioned or be placed on dielectric resonance vertically
It is placed in the slot on resonator dividing wall in slot on chamber dividing wall or at any angle.
The shell cavity is metal material；Dielectric resonant chamber is made of medium ceramic material in the cavity.
It interfering to reduce, coupling ties are intersected on the cavity body filter can only install one to three,
It is advisable with reaching best results.
The present invention provides cavity body filter be by cavity and medium using cross-couplings connector and metal regulating rod
Resonator carries out cross-linked.By change U-shaped bar both ends length and place position, come adjust cross-couplings part with
The electric field formed between resonator, so as to being inhibited well with outer clutter, relative to optimizing repeatedly in the prior art
Cross coupling structure part, it is easy to touch the mark, and simple and practicable, production efficiency can greatly be improved, reduce production cost.
Description of the drawings
Fig. 1 is the cross coupling structure schematic diagram in the circular cavity filter (three chambers) in case study on implementation of the present invention；
Fig. 2 is the cross coupling structure schematic diagram in the square cavity wave filter (five chambers) in case study on implementation of the present invention；
Fig. 3 is the dielectric resonator schematic diagram in case study on implementation of the present invention
Fig. 4 is the U-shaped bar schematic diagram of metal in case study on implementation of the present invention
Wherein, 1---- metal circulars shell cavity, 2---- dielectric resonators, 3---- media adjust cover board, 4---- gold
Category regulating rod, 5---- input metal ports, 6---- output metal ports, the U-shaped bar of 7---- cross-couplings connector metals,
8---- metal square cavity shells,
Specific embodiment
Embodiment 1：
As can be seen from Figure 1, this is a kind of three chamber cavity body filters, and including circular cavity metal shell 1, dielectric resonator 2 is situated between
Matter adjusts the metal regulating rod 4 between cover board 3 and neighboring chambers, input signal metal port 5, output signal metal port
6, AC is connected by cross-couplings connector, and connector is the U-shaped bar 7 of metal, for transmitting the electromagnetic field between non-conterminous chamber.
In three chamber cavity body filter structures, when being coupled as capacitive, low strap can generate a transmission zero, so as to enhance
The Out-of-band rejection of low strap enhances filtering performance.When being coupled as perception, high band can generate a transmission zero, so as to enhance height
The Out-of-band rejection of band enhances filtering performance.
Cross coupling structure part in case study on implementation of the present invention can be used as a kind of capacitive coupling, can also be used as a kind of sense
Property coupling.By changing the length at the U-shaped bar both ends of metal, when length is less than λ/2, U-shaped bar is just used as inductive coupling.Conversely, work as
Length is more than λ/2, and U-shaped bar is just used as capacitive coupling.
Circular cavity filter in case study on implementation of the present invention is 4G base stations medium cavity filter.
Embodiment 2：
From figure 2, it is seen that its shell of this five chambers cavity body filter is the metal side's shell cavity 8 used, remaining and Fig. 1 institutes
Show identical.Including outer cover metal cylindrical cavity body 8, dielectric resonator, 2, for adjusting the medium cover board 3 of electromagnetic field, input and output letter
Number metal port 5 and 6 and neighboring chambers between metal regulating rod 4, cross-couplings connector by CE be connected or will
AC or BD or AD or BE are connected, and connector is the U-shaped bar 7 of metal, for transmitting the electromagnetic field between adjacent chambers.
In this configuration, when being coupled as capacitive, low strap can generate a transmission zero, so as to enhance the outer suppression of the band of low strap
System enhances filtering performance.When being coupled as perception, high band can generate a transmission zero, so as to enhance the Out-of-band rejection of high band,
Enhance filtering performance.
Circular cavity filter in case study on implementation of the present invention is 4G base stations medium cavity filter.
Claims (4)
1. a kind of cavity body filter of cross coupling structure, it includes tri- cavitys of A, B, C, is equipped in each cavity by dividing wall
The dielectric resonant chamber separated, medium is provided on resonator and adjusts cover board, it is characterised in that is equipped on A, C dielectric resonant chamber defeated
Enter metal port and output metal port, metal regulating rod is set between AB, BC adjacent media resonant cavity；Equipped with defeated
Enter, export to be equipped with cross-couplings connector between two dielectric resonant chambers of AC of metal port；
The cross-couplings connector is a U-shaped metallic rod, the U-shaped metallic rod bar be fixed on two dielectric resonant chambers every
From on wall, both ends length does not have linear relationship, and the U-shaped bar can be horizontal positioned or be placed on dielectric resonant chamber dividing wall vertically
On slot in or the slot that is placed at any angle on resonator dividing wall in.
A kind of 2. cavity body filter of cross coupling structure according to claim 1, it is characterised in that the shell cavity
For metal material；Dielectric resonant chamber is made of medium ceramic material in the cavity.
3. a kind of cavity body filter of cross coupling structure, it includes five cavitys of A, B, C, D, E, be equipped in each cavity by every
From the dielectric resonant chamber that wall separates, medium is provided on resonator and adjusts cover board, it is characterised in that is set on A, E dielectric resonant chamber
There are input metal port and output metal port, metal regulating rod is set between AB, BC, CD, DE adjacent media resonant cavity；
Between two non-conterminous dielectric resonant chambers of AC or BD or AD or BE or CE be equipped with cross-couplings connector or
Person is equipped with cross-couplings connector between the AE dielectric resonant chambers equipped with input, output metal port；
The cross-couplings connector is a U-shaped metallic rod, the U-shaped metallic rod bar be fixed on two dielectric resonant chambers every
From on wall, both ends length does not have linear relationship, and the U-shaped bar can be horizontal positioned or be placed on dielectric resonant chamber dividing wall vertically
On slot in or the slot that is placed at any angle on resonator dividing wall in.
A kind of 4. cavity body filter of cross coupling structure according to claim 3, it is characterised in that the shell cavity
For metal material；Dielectric resonant chamber is made of medium ceramic material in the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810178710.1A CN108232386A (en) | 2018-03-05 | 2018-03-05 | A kind of cavity body filter of cross coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810178710.1A CN108232386A (en) | 2018-03-05 | 2018-03-05 | A kind of cavity body filter of cross coupling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108232386A true CN108232386A (en) | 2018-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810178710.1A Pending CN108232386A (en) | 2018-03-05 | 2018-03-05 | A kind of cavity body filter of cross coupling structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN108232386A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| CN110534858A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of changeover mechanism of filter |
| WO2020014980A1 (en) * | 2018-07-20 | 2020-01-23 | 深圳市大富科技股份有限公司 | Cross-coupling structure and cavity filter |
| CN112436260A (en) * | 2020-11-25 | 2021-03-02 | 苏州灿勤通讯技术有限公司 | Novel TE mode dielectric resonator |
| CN112544012A (en) * | 2019-07-23 | 2021-03-23 | 深圳市大富科技股份有限公司 | Filter, communication and radio frequency remote equipment, transceiver and tower top amplifier |
| CN110534858B (en) * | 2019-07-26 | 2024-06-04 | 苏州诺泰信通讯有限公司 | Switching mechanism of filter |
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| CN2847557Y (en) * | 2005-11-28 | 2006-12-13 | 浙江三维通信股份有限公司 | Chamber filter with adjustable capacitor coupling structure |
| CN101626101A (en) * | 2009-08-11 | 2010-01-13 | 京信通信系统（中国）有限公司 | Cavity medium filter and out-band rejection method |
| CN102544658A (en) * | 2012-01-10 | 2012-07-04 | 深圳市大富科技股份有限公司 | Cavity filter and cross-coupling structure of cavity filter |
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2018
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| CN2847557Y (en) * | 2005-11-28 | 2006-12-13 | 浙江三维通信股份有限公司 | Chamber filter with adjustable capacitor coupling structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020014980A1 (en) * | 2018-07-20 | 2020-01-23 | 深圳市大富科技股份有限公司 | Cross-coupling structure and cavity filter |
| CN111033886A (en) * | 2018-07-20 | 2020-04-17 | 深圳市大富科技股份有限公司 | Cross coupling structure and cavity filter |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| CN109687073B (en) * | 2019-03-01 | 2024-04-12 | 江苏德是和通信科技有限公司 | Digital television adjacent channel star-shaped duplexer |
| CN112544012A (en) * | 2019-07-23 | 2021-03-23 | 深圳市大富科技股份有限公司 | Filter, communication and radio frequency remote equipment, transceiver and tower top amplifier |
| CN110534858A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of changeover mechanism of filter |
| CN110534858B (en) * | 2019-07-26 | 2024-06-04 | 苏州诺泰信通讯有限公司 | Switching mechanism of filter |
| CN112436260A (en) * | 2020-11-25 | 2021-03-02 | 苏州灿勤通讯技术有限公司 | Novel TE mode dielectric resonator |
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Application publication date: 20180629 |
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