CN209232918U - Cavity body filter and communication radio frequency device - Google Patents
Cavity body filter and communication radio frequency device Download PDFInfo
- Publication number
- CN209232918U CN209232918U CN201822101226.7U CN201822101226U CN209232918U CN 209232918 U CN209232918 U CN 209232918U CN 201822101226 U CN201822101226 U CN 201822101226U CN 209232918 U CN209232918 U CN 209232918U
- Authority
- CN
- China
- Prior art keywords
- band
- resonator
- cavity body
- filter
- coupling
- 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.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
This application discloses a kind of cavity body filter and communication radio frequency device, which includes first port, second port, bandpass filter and bandstop filter；One end of bandpass filter is connect by the first tap line with first port, and the other end of bandpass filter is connect by the second tap line with second port；Bandpass filter includes at least two by the first coupling cascade band-pass resonator of window, and bandstop filter includes and the consistent band resistance resonator of band-pass resonator quantity, wherein band resistance resonator is coupled by the second coupling window with corresponding band-pass resonator.The structure of the cavity body filter is simple, and processing technology is simple, convenient for batch production, meanwhile, there is good consistency and stability.
Description
Technical field
This application involves wave filter technology field more particularly to a kind of cavity body filters and communication radio frequency device.
Background technique
In the base station system, the signal of communication in particular frequency range is usually emitted by transmitting antenna, and passes through reception
Antenna receives signal of communication.
But by not only including the signal of communication in particular frequency range in receiving antenna received signal, but also wrap
Include many clutters or interference signal.It to be obtained in the particular frequency range that transmitting antenna emits from receiving antenna received signal
Signal of communication, it usually needs the receiving antenna received signal is filtered by filter, the signal of communication is specific
Clutter or interference signal outside frequency filter out.
The filter of the prior art realizes that the signal between different resonant cavities is transmitted using fixed structure, not only processes
Complex process, and machining accuracy is restricted by processing conditions and production environment, it is difficult to guarantee that the size of each structural member can
It is consistent, causes the consistency and stability of filter poor, influence the performance of filter.
Utility model content
The application is mainly solving the technical problems that provide a kind of cavity body filter and communication radio frequency device, cavity filter
The structure of wave device is simple, and processing technology is simple, convenient for batch production, meanwhile, there is good consistency and stability.
In order to solve the above technical problems, first technical solution that the application uses is: providing a kind of cavity body filter, institute
Stating cavity body filter includes first port, second port, bandpass filter and bandstop filter；The one of the bandpass filter
End is connect by the first tap line with the first port, the other end of the bandpass filter pass through the second tap line with it is described
Second port connection；The bandpass filter includes at least two by the first coupling cascade band-pass resonator of window, described
Bandstop filter includes and the band-pass resonator quantity consistent band resistance resonator, wherein the band resistance resonator passes through the
Two coupling windows are coupled with the corresponding band-pass resonator.
In order to solve the above technical problems, second technical solution that the application uses is: a kind of communication radio frequency device is provided,
The communication radio frequency device includes any cavity body filter of the application, and the cavity body filter is set to the communication radio frequency
The transceiver circuit part of device, selects signal.
The beneficial effect of the application is: be different from the prior art, the cavity body filter cavity of the application include first port,
Second port, bandpass filter and bandstop filter；One end of bandpass filter is connected by the first tap line and first port
It connects, the other end of bandpass filter is connect by the second tap line with second port；Bandpass filter passes through including at least two
The first coupling cascade band-pass resonator of window, bandstop filter include hindering resonator with the consistent band of band-pass resonator quantity,
Wherein, band resistance resonator is coupled by the second coupling window with corresponding band-pass resonator.In the cavity body filter of the application
Resonator carries out signal energy transmission by coupling window, and structure is simple, and processing technology is simple, convenient for batch production, can be improved
The efficiency of production.Meanwhile the cavity body filter has good consistency and stability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the application cavity body filter；
Fig. 2 is the structural schematic diagram of one embodiment of band-pass resonator in Fig. 1 cavity body filter；
Fig. 3 is the structural schematic diagram with resistance one embodiment of resonator in Fig. 1 cavity body filter；
Fig. 4 is the schematic equivalent circuit of one embodiment of Fig. 1 cavity body filter.
Specific embodiment
The application provides a kind of cavity body filter and communication radio frequency device, for the purpose, technical solution and skill for making the application
Art effect definitely, it is clear, below to the application be further described, it should be understood that specific implementation item described herein
Example is only used for explaining the application, is not used to limit the application.
The cavity body filter of present embodiment includes first port, second port, bandpass filter and bandstop filter.
Wherein, one end of bandpass filter is connect by the first tap line with first port, and the other end of bandpass filter passes through second
Tap line is connect with second port.
Bandpass filter includes at least two by the first coupling cascade band-pass resonator of window, and bandstop filter includes
Resonator is hindered with the consistent band of band-pass resonator quantity, wherein band resistance resonator passes through the second coupling window and corresponding band logical
Resonator coupling.
In order to clearly illustrate the cavity body filter of above embodiment, referring to Fig. 1, Fig. 1 is the application cavity body filter
The structural schematic diagram of one embodiment.
The cavity body filter of present embodiment includes first port 10, second port 11, bandpass filter and filters with resistance
Wave device.In one of them embodiment, first port 10 is input port, for receiving signal to be processed；Second end
Mouth 11 is output port, for exporting the signal after being filtered.
Wherein, one end of bandpass filter is connect by the first tap line 12 with first port 10, bandpass filter it is another
One end is connect by the second tap line 13 with second port 11.Wherein, the first tap line 12 and the second tap line 13 are four points
One of wavelength transmission line.
Specifically, the first tap line 12 is connect by the first connector 14 with first port 10, and the second tap line 13 passes through
Second connector 15 is connect with second port 11.
In the present embodiment, bandpass filter includes at least two by the first coupling cascade band logical resonance of window 16
Device 17, bandstop filter include and the consistent band resistance resonator 18 of 17 quantity of band-pass resonator, wherein band resistance resonator 18 passes through
Second coupling window 19 is coupled with corresponding band-pass resonator 17.Wherein, the first coupling window 16 and the second coupling window 19
For transmitting electromagnetic wave, by the intensity of the size control coupling of control coupling window, the size about coupling window can basis
Actual conditions design.
Optionally, in order to reinforce the stiffness of coupling between the band-pass resonator 17 in bandpass filter, bandpass filter is also
Including coupling muscle 20, also connected by coupling muscle 20 between two neighboring band-pass resonator 17.One of them embodiment
In, adjust the stiffness of coupling of coupling muscle 20 in use for convenience, bandpass filter further includes coupling screw rod 21, couples screw rod
21 are disposed adjacent with coupling muscle 20, with the corresponding stiffness of coupling for adjusting coupling muscle 20.About the performance parameter of coupling muscle 20, such as
Width or material can design according to the actual situation, be not specifically limited herein.
In addition, cavity body filter is also in order to reinforce band-pass resonator 17 and with the stiffness of coupling between resistance resonator 18
Including coupling piece 22, so as to also be coupled by coupling piece 22 with corresponding band-pass resonator 17 with resistance resonator 18, to reinforce
Stiffness of coupling.It can design, not do herein specific according to the actual situation about the performance parameter of coupling piece 22, such as width or material
It limits.
In the present embodiment, band-pass resonator 17 and be metal resonators, and band-pass resonator with resistance resonator 18
17 and with resistance resonator 18 on be provided with frequency modulation screw rod (not shown), with by frequency modulation screw rod adjust resonance frequency.?
In another embodiment, in order to improve the quality factor of resonator, temperature stabilization and the pottery with high quality factor can be selected
Ceramic material replaces metal material, ceramic resonator is made.
Further, in the present embodiment, cavity body filter includes cavity and cover board, band-pass resonator 17 and humorous with hindering
The setting of device 18 shake in the cavity, first port 10 and second port 11 are arranged on the side wall of cavity, and cover board covers cavity, with
Cavity is sealed, and then forms closed space.
Meanwhile for the ease of fixed cover board, and reach better seal effect, in the present embodiment, cavity body filter
Further include cavity wall 23, be correspondingly arranged on screw hole in cavity wall 23, to fix cover board.
Since the performance indicator of cavity body filter may have error after factory or after assembling, for convenience in reality
In the use process of border, cavity body filter is finely adjusted according to the actual situation.Band-pass resonator 17 and with resistance resonator 18 tune
Frequency screw rod exposes outside cover board, so that user adjusts the length that frequency modulation screw rod protrudes into corresponding resonator by turn frequency modulation screw rod, with
Adjust resonance frequency.
Optionally, coupling screw rod 21 exposes outside cover board, so that user, which couples screw rod 21 by turn, adjusts corresponding coupling muscle
20 stiffness of coupling.
In another embodiment, frequency modulation screw rod and coupling screw rod 21 can also expose outside the bottom wall of cavity, herein not
It is specifically limited.
In an actual application scenarios, bandpass filter includes six band-pass resonators 17, and bandstop filter includes
Six band resistance resonators 18.Wherein, the centre frequency of 17 resonance of band-pass resonator is 850MHz, in resistance 18 resonance of resonator
Frequency of heart is 870MHz.In conjunction with Fig. 1 and aforementioned explanatory note, six band-pass resonators 17 and this six band resistance resonators 18 with
Window coupled modes form resonant tank, to form band block cavity fluid filter, the cutoff frequency range with block cavity fluid filter
For 869MHz~879.4MHz.
Specifically, first port 10 is coupled by the first connector 14 and the first tap line 12, the first tap line 12 and band
First band-pass resonator 17 in bandpass filter couples, other band-pass resonators 17 are coupled by the first coupling cascade of window 16,
To form bandpass filter.After end band-pass resonator 17 and the coupling of the second tap line 13 in bandpass filter, then pass through the
Two connectors 15 are coupled with second port 11.Band resistance resonator 18 passes through the second coupling window 19 and corresponding band-pass resonator 17
Coupling.
In order to reinforce the stiffness of coupling between the band-pass resonator 17 in bandpass filter, bandpass filter further includes coupling
Muscle 20 is connected by coupling muscle 20 between two neighboring band-pass resonator 17.In order to reinforce band-pass resonator 17 and with resistance resonance
Stiffness of coupling between device 18, cavity body filter further include coupling piece 22, so as to also pass through coupling piece 22 with resistance resonator 18
It is coupled with corresponding band-pass resonator 17, to reinforce stiffness of coupling.
Here, be signal input port with first port 10, second port 11 is to illustrate for signal output port
The working principle of the cavity body filter.
Signal to be processed enters cavity body filter by first port 10, by band-pass resonator 17 and with resistance resonator
18 resonant tanks formed, select the signal of the different wave length in signal to be processed, in the present embodiment, the cavity
It is the signal of 869MHz~879.4MHz that filter, which inhibits wave-length coverage, with filtering clutter, then signal after treatment is led to
Cross the output of second port 11.
Here, it is emphasized that the openings of sizes of coupling window is not specifically limited, but coupling window need to meet four points
One of wavelength transmission signal.
For the structure of the clear band-pass resonator of any of the above-described embodiment, referring to Fig. 2, Fig. 2 is the filtering of Fig. 1 cavity
The structural schematic diagram of one embodiment of band-pass resonator in device.
The band-pass resonator 17 of present embodiment includes resonant cavity 171 and frequency modulation screw rod 172.Frequency modulation screw rod 172 protrudes into
It, in actual use, can be humorous by adjusting the depth adjustment that frequency modulation screw rod 172 protrudes into resonant cavity 171 in resonant cavity 171
The frequency of vibration.
For the structure with resistance resonator of clear any of the above-described embodiment, referring to Fig. 3, Fig. 3 is the filtering of Fig. 1 cavity
The structural schematic diagram with resistance one embodiment of resonator in device.
The band resistance resonator 18 of present embodiment includes resonant cavity 181 and frequency modulation screw rod 182.Frequency modulation screw rod 182 protrudes into
It, in actual use, can be humorous by adjusting the depth adjustment that frequency modulation screw rod 182 protrudes into resonant cavity 181 in resonant cavity 181
The frequency of vibration.
Further, it for the working principle of the cavity body filter of the clear any of the above-described embodiment of explanation, is filtered with cavity
Wave device includes six band-pass resonators and six band resistance resonators, and coupling is provided between two neighboring band-pass resonator
Muscle, band-pass resonator and with being provided with for coupling piece and illustrate between resistance resonator.Referring to Fig. 4, Fig. 4 is Fig. 1 cavity
The schematic equivalent circuit of one embodiment of filter.Arrow direction indicates the direction of signal stream in figure.
Wherein, six band-pass resonators 17 are sequentially communicated to form bandpass filter by coupling muscle 20, to realize the band general character
Energy；Six band resistance resonators 18 form bandstop filter, to realize with resistive energy.
After signal to be processed enters cavity body filter by first port 10, band logical filter is transferred to by the first tap line 12
First band-pass resonator 17 in wave device, it is humorous that first band-pass resonator 17 is transferred to second band logical by coupling muscle 20 again
Shake device 17, and so on, until being transferred to the 6th band-pass resonator 17；Meanwhile each band-pass resonator 17 passes through coupling piece
22 couple with corresponding band resistance resonator 18, to transmit signal.
In the present embodiment, band-pass resonator 17 and the resonant tank formed with resistance resonator 18, to signal to be processed
In the signal of different wave length selected, with filtering clutter.It is again that signal after treatment is defeated by the second tap line 13
Out to second port 11.
It is different from the prior art, the cavity body filter of present embodiment includes first port, second port, bandpass filter
And bandstop filter；One end of bandpass filter is connect by the first tap line with first port, bandpass filter it is another
End is connect by the second tap line with second port；Bandpass filter includes at least two by the first coupling cascade band of window
Bandpass resonator, bandstop filter include and band-pass resonator quantity consistent band resistance resonator, wherein band resistance resonator passes through the
Two coupling windows are coupled with corresponding band-pass resonator.Resonator in the cavity body filter of present embodiment passes through coupling window
Signal energy transmission is carried out, structure is simple, and processing technology is simple, and the efficiency of production can be improved.Meanwhile the cavity body filter has
Good consistency and stability.
The application also provides a kind of communication radio frequency device, and communication radio frequency device includes the cavity filter of any of the above-described embodiment
Wave device, the cavity body filter are set to the transceiver circuit part of communication radio frequency device, select signal.
Wherein, communication radio frequency device is either simplex device, duplexer, splitter, combiner or tower amplifier.
About the structure of cavity body filter, in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4 and aforementioned text, detailed description, herein
It is no longer superfluous to talk.
It is different from the prior art, the cavity body filter in the communication radio frequency device of present embodiment includes first port,
Two-port netwerk, bandpass filter and bandstop filter；One end of bandpass filter is connect by the first tap line with first port,
The other end of bandpass filter is connect by the second tap line with second port；Bandpass filter includes at least two by first
The cascade band-pass resonator of window is coupled, bandstop filter includes and the consistent band resistance resonator of band-pass resonator quantity, wherein
Band resistance resonator is coupled by the second coupling window with corresponding band-pass resonator.It is humorous in the cavity body filter of present embodiment
Device shake by coupling window progress signal energy transmission, structure is simple, and processing technology is simple, and the efficiency of production can be improved.Meanwhile
The cavity body filter has good consistency and stability.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of patent protection of the application, all benefits
The equivalent structure or equivalent flow shift made by present specification and accompanying drawing content is applied directly or indirectly in other phases
The technical field of pass similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of cavity body filter, which is characterized in that the cavity body filter includes first port, second port, bandpass filtering
Device and bandstop filter；One end of the bandpass filter is connect by the first tap line with the first port, the band
The other end of bandpass filter is connect by the second tap line with the second port；
The bandpass filter includes at least two by the first coupling cascade band-pass resonator of window, the bandstop filter
Including hindering resonator with the consistent band of the band-pass resonator quantity, wherein the band resistance resonator passes through the second coupling window
It is coupled with the corresponding band-pass resonator.
2. cavity body filter according to claim 1, which is characterized in that the bandpass filter further includes coupling muscle, phase
It is also connected by the coupling muscle between adjacent two band-pass resonators.
3. cavity body filter according to claim 2, which is characterized in that the bandpass filter further includes coupling screw rod,
The coupling screw rod is disposed adjacent with the coupling muscle, with the corresponding stiffness of coupling for adjusting the coupling muscle.
4. cavity body filter according to claim 1, which is characterized in that the cavity body filter further includes coupling piece, institute
Band resistance resonator is stated also to pass through the coupling piece and couple with corresponding band-pass resonator.
5. cavity body filter according to claim 1, which is characterized in that the band-pass resonator and the band hinder resonator
For metal resonators.
6. cavity body filter according to claim 1, which is characterized in that the band-pass resonator and the band hinder resonator
On be provided with frequency modulation screw rod, with pass through the frequency modulation screw rod adjust resonance frequency.
7. cavity body filter according to claim 1, which is characterized in that the centre frequency of the band-pass resonator resonance is
The centre frequency of 850MHz, the band resistance resonator resonance are 870MHz.
8. cavity body filter according to claim 7, which is characterized in that the bandpass filter includes six band logicals
Resonator, the bandstop filter include that six bands hinder resonator.
9. cavity body filter according to claim 8, which is characterized in that the cavity body filter is that band block cavity body filters
Device, the cutoff frequency range with block cavity fluid filter are 869MHz~879.4MHz.
10. a kind of communication radio frequency device, which is characterized in that the communication radio frequency device includes that claim 1~9 is any described
Cavity body filter, the cavity body filter are set to the transceiver circuit part of the communication radio frequency device, select signal
It selects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822101226.7U CN209232918U (en) | 2018-12-14 | 2018-12-14 | Cavity body filter and communication radio frequency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822101226.7U CN209232918U (en) | 2018-12-14 | 2018-12-14 | Cavity body filter and communication radio frequency device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209232918U true CN209232918U (en) | 2019-08-09 |
Family
ID=67507677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822101226.7U Active CN209232918U (en) | 2018-12-14 | 2018-12-14 | Cavity body filter and communication radio frequency device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209232918U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509338A (en) * | 2020-06-03 | 2020-08-07 | 广东国华新材料科技股份有限公司 | Dielectric duplexer and small duplexer based on stepped impedance transformation tap |
-
2018
- 2018-12-14 CN CN201822101226.7U patent/CN209232918U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509338A (en) * | 2020-06-03 | 2020-08-07 | 广东国华新材料科技股份有限公司 | Dielectric duplexer and small duplexer based on stepped impedance transformation tap |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209357889U (en) | Cavity body filter, duplexer and radio-frequency devices | |
| CN106301516B (en) | Diversity receiver and terminal | |
| CN209691919U (en) | Cavity body filter and communication radio frequency device | |
| CN105490733B (en) | Signal transmitting and receiving machine | |
| CN106450600B (en) | Steep plane duplexer of sideband based on band-pass band elimination mixed structure | |
| CN208444927U (en) | A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load | |
| CN104900948B (en) | A kind of line of rabbet joint couple feed band logical unit of multifrequency balance filter/duplexer | |
| KR100976251B1 (en) | Non-contacting cavity filter using for matching tuning bar | |
| KR101919456B1 (en) | Dielectric ceramic waveguide duplexer | |
| CN110808440A (en) | Dielectric waveguide duplexer | |
| WO2020125344A1 (en) | Radio frequency piezoelectric multiplexer for improving isolation based on phase-shift network and electronic device | |
| CN209232918U (en) | Cavity body filter and communication radio frequency device | |
| CN204651440U (en) | A kind of line of rabbet joint couple feed band of multifrequency balance filter/duplexer leads to unit | |
| CN105633520B (en) | A kind of double frequency narrow-band bandpass dielectric filter | |
| CN207624877U (en) | A kind of bandstop filter and communication equipment | |
| CN208970708U (en) | Cavity body filter and communication radio frequency device | |
| US20200076032A1 (en) | Transmission-Line Filtering with Enhanced Frequency Response | |
| CN206116567U (en) | Precipitous plane of side band duplexer based on band -pass band stop mixed structure | |
| CN111146539B (en) | Ceramic dielectric waveguide duplexer | |
| CN107293832A (en) | A kind of four-port microstrip line duplexer | |
| CN208986181U (en) | A kind of plane omnidirectional dipole duplexed antenna | |
| CN111224209A (en) | Waveguide band-pass filter based on waveguide re-cut-off characteristic and design method thereof | |
| CN106252795A (en) | A kind of LTE duplexer and coupling window design method thereof | |
| CN213905562U (en) | Cavity duplexer with additional zero point introduced | |
| TWM596461U (en) | Internet-of-things duplexer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole street, oyster Road, manhole Industrial Company Third Industrial Zone, A1, A2, A3 101, A4 first, second, third layers Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |