CN113675555A - Communication device and filter thereof - Google Patents
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- CN113675555A CN113675555A CN202010409073.1A CN202010409073A CN113675555A CN 113675555 A CN113675555 A CN 113675555A CN 202010409073 A CN202010409073 A CN 202010409073A CN 113675555 A CN113675555 A CN 113675555A
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- 238000004891 communication Methods 0.000 title claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 171
- 238000006880 cross-coupling reaction Methods 0.000 claims abstract description 28
- 230000008878 coupling Effects 0.000 claims description 27
- 238000010168 coupling process Methods 0.000 claims description 27
- 238000005859 coupling reaction Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 230000001939 inductive effect Effects 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 230000008093 supporting effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 15
- 230000001629 suppression Effects 0.000 description 8
- 238000010295 mobile communication Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
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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
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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
- H01P1/209—Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide
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Abstract
The application discloses a communication device and a filter thereof, wherein the filter comprises a shell, a first side and a second side, wherein the first side and the second side are perpendicular to each other; the filtering branch is arranged in the shell and consists of twelve filtering cavities which are sequentially coupled, and the twelve filtering cavities of the filtering branch form five cross-coupling zero points; the filter branches are divided into two rows arranged along the second direction, and the bandwidth of each filter branch is located in the range of 2300MHz to 2395 MHz. The filter is regular in arrangement and compact in distribution, and layout and miniaturization are facilitated.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication device and a filter thereof.
Background
In a base station and an antenna feed system for mobile communication, a filter plays a role of frequency selection as one of core components, and becomes an indispensable part of the base station for mobile communication. Generally, different communication base stations have their own specific operating frequency bands, and therefore the base stations must have the capability of selecting various frequency signals for transceiving. The filter has the main function of filtering the transmitting and receiving signals so as to eliminate the unnecessary frequency band signals and ensure the accuracy of the transmitting and receiving signals. The microwave filter is a key radio frequency device at the front end of a modern mobile communication system, and is widely applied to wireless communication base stations and various mobile communication terminals. Under the environment that various spectrum resources are increasingly tense, people have higher and higher requirements on the call quality and the internet access speed, so the requirements on a filter are also stricter and stricter.
The inventor of the present application found in long-term research and development work that the arrangement of a plurality of filter cavities in the current filter is random, which is not favorable for reducing the size of the filter.
Disclosure of Invention
The application provides a communication device and a filter thereof, which are used for solving the problems of the filter in the prior art.
In order to solve the above technical problem, the present application provides a filter, including: a housing having a first direction and a second direction perpendicular to each other; the filtering branch circuit is arranged in the shell and consists of twelve filtering cavities which are sequentially coupled, and the twelve filtering cavities of the filtering branch circuit form five cross-coupling zero points; the filtering branches are divided into two rows arranged along the second direction, and the bandwidth of each filtering branch is located in the range of 2300 MHz-2395 MHz.
Optionally, the filter cavity includes: a cavity; the resonance rod is accommodated in the cavity and comprises a side wall and a hollow inner cavity formed by the side wall; a first tuning rod, one end of the first tuning rod disposed within the hollow interior.
Optionally, two of the coupling in proper order are provided with first window between the filtering chamber, the wave filter still includes the second tuning rod, sets up first window department, the second tuning rod is used for adjusting two of coupling in proper order the coupling bandwidth between the filtering chamber.
Optionally, the first filter cavity, the third filter cavity, the fourth filter cavity, the seventh filter cavity, the eighth filter cavity and the eleventh filter cavity of the filter branch are in a row and are sequentially arranged along the first direction; and the second filtering cavity, the fifth filtering cavity, the sixth filtering cavity, the ninth filtering cavity, the tenth filtering cavity and the twelfth filtering cavity of the filtering branch are in a row and are sequentially arranged along the first direction.
Optionally, the fifth filtering cavity of the filtering branch is further respectively and adjacently disposed to the second filtering cavity, the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity, and the eighth filtering cavity of the filtering branch is further respectively and adjacently disposed to the seventh filtering cavity, the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity.
Optionally, the first filtering cavity and the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity, and the eighth filtering cavity and the tenth filtering cavity of the filtering branch are inductively cross-coupled to form three inductive cross-coupling zeros; and capacitive cross coupling is respectively performed between the fourth filtering cavity and the seventh filtering cavity and between the eighth filtering cavity and the eleventh filtering cavity of the filtering branch circuit so as to form two capacitive cross coupling zeros.
Optionally, the filter further includes a metal coupling rib, and the metal coupling rib is disposed between an eleventh filtering cavity and a twelfth filtering cavity of the filtering branch.
Optionally, the filter further includes a flying rod, the flying rod is respectively disposed between a fourth filtering cavity and a seventh filtering cavity of the filtering branch, and between an eighth filtering cavity and an eleventh filtering cavity of the filtering branch, the flying rod includes a coupling probe and a supporting clamping seat, the supporting clamping seat is respectively fixed to a first window between the fourth filtering cavity and the seventh filtering cavity and a first window between the eighth filtering cavity and the eleventh filtering cavity, and the coupling probe is respectively suspended between the fourth filtering cavity and the seventh filtering cavity, and between the eighth filtering cavity and the eleventh filtering cavity.
Optionally, the housing is provided with a first port and a second port, the first port is connected to the first filtering cavity of the filtering branch, and the second port is connected to the twelfth filtering cavity of the filtering branch.
In order to solve the above technical problem, the present application provides a communication device, where the communication device includes an antenna and a radio frequency unit connected to the antenna, the radio frequency unit includes any one of the above filters, and the filter is configured to filter the radio frequency signal.
The filter of the present application includes a housing having a first direction and a second direction perpendicular to each other; the filtering branch is arranged in the shell and consists of twelve filtering cavities which are sequentially coupled, and the twelve filtering cavities of the filtering branch form five cross-coupling zero points; the filter branches are divided into two rows arranged along the second direction, and the bandwidth of each filter branch is located in the range of 2300MHz to 2395 MHz. The filter cavities in the filter are arranged regularly and distributed compactly, and layout and miniaturization are facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic 3D structure of an embodiment of the filter of the present application;
FIG. 2 is a side schematic view of an embodiment of the filter of the present application;
FIG. 3 is a schematic diagram of the topology of the filter branch of the filter of the present application;
FIG. 4 is a schematic diagram of an embodiment of a filter cavity of a filter according to the present application;
FIG. 5 is a schematic diagram of an embodiment of a filter fly rod according to the present application;
FIG. 6 is a schematic diagram of a circuit configuration of an embodiment of the filter of the present application;
FIG. 7 is a diagram illustrating simulation results of an embodiment of the filter of the present application;
FIG. 8 is a schematic block diagram of an embodiment of a communication device of the present application;
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present application, the communication device and the filter thereof provided by the present invention are further described in detail below with reference to the accompanying drawings and the detailed description.
Fig. 1 to 3 show a filter, where fig. 1 is a schematic 3D structure diagram of an embodiment of the filter, fig. 2 is a schematic side view of the embodiment of the filter, and fig. 3 is a schematic topology structure diagram of a filtering branch of the filter.
As shown in fig. 1 and 2, the filter 10 of the present embodiment includes a housing 11 and a filter branch 12. The housing 11 has a first direction L and a second direction D, and the first direction L of the housing 11 is perpendicular to the second direction D of the housing 11. And the filtering branch 12 is arranged in the shell 11 and consists of twelve filtering cavities 121 which are coupled in sequence, and the twelve filtering cavities 121 of the filtering branch 12 form five cross-coupling zeros. The filtering branch 12 is divided into two rows arranged along the second direction D, and the bandwidth of the filtering branch 12 is in the range of 2300MHz to 2395 MHz.
As can be seen from fig. 1 and 2, the filter branches 12 are arranged regularly and distributed compactly, which is beneficial to layout and miniaturization; the filtering branch 12 is provided with five cross-coupling zeros, which can realize zero suppression and facilitate debugging indexes, so that the bandwidth of the filtering branch 12 is in the range of 2300MHz to 2395 MHz.
Wherein the cross-coupling zero may also be referred to as a transmission zero. The transmission zero is the transmission function of the filter 10 equal to zero, that is, the electromagnetic energy at the frequency point corresponding to the transmission zero cannot pass through the network, so that the complete isolation effect is achieved, the suppression effect on the signals outside the passband is achieved, and the high isolation among a plurality of passbands can be better achieved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a filter cavity of a filter according to an embodiment of the present application. The filter cavity 121 may include a cavity 401, a resonant rod 402 and a first tuning rod 403. The first tuning rod 403 may be used to adjust the frequency of the filter cavity. The housing 11 may form a plurality of cavities 401. The housing 11, the resonant rod 402 and the first tuning rod 403 may be made of metal, such as copper, iron, etc.
Specifically, the resonant rod 402 may be housed in the cavity 401, and the resonant rod 402 may include a side wall 4021, a hollow inner cavity 4022, and a flange structure 4023; sidewall 4021 may form a hollow interior cavity 4022 and one end of first tuning rod 403 may be disposed within hollow interior cavity 4022. The cuff structure 4023 is disposed at one end of the sidewall 4021, and the cuff structure 4023 may be integrally disposed with the sidewall 4021, that is, the cuff structure 4023 may be regarded as being formed by extending and bending one end of the sidewall 4021 in a direction away from the hollow cavity 4022.
The filter cavity 121 may further comprise a fixing member 404, and the other end of the side wall 4021 may be fixed in the cavity 401 by the fixing member 404, that is, the fixing member 404 may be used to fix the position of the resonant rod 402 in the cavity 401.
In this embodiment, the size of the filter cavity 121 may be 39mm by 24 mm. In order to meet the requirement of high-power bearing, a large chamfer structure can be used in the disc of the filter cavity 121, and the resonance rod 402 can adopt a disc structure with the thickness of 2.5mm, namely the flanging structure 4023.
In addition, a first window (not shown) may be disposed between two filter cavities 121 coupled in sequence, and the filter 10 may further include a second tuning rod 13. As shown in fig. 1 and 2, a second tuning rod 13 is disposed at the first window, and the second tuning rod 13 can be used to adjust the coupling bandwidth between two filter cavities 121 coupled in sequence. The first window may be a metal window, and electromagnetic coupling between the resonant modes may be achieved through the metal window between the sequentially coupled filter cavities 121.
The filter branches 12 are divided into two columns arranged in the second direction D. Specifically, as shown in fig. 2, the first filter cavity a1, the third filter cavity A3, the fourth filter cavity a4, the seventh filter cavity a7, the eighth filter cavity A8 and the eleventh filter cavity a11 of the filter branch 12 are in a row and are sequentially arranged along the first direction L.
The second filtering cavity a2, the fifth filtering cavity a5, the sixth filtering cavity a6, the ninth filtering cavity a9, the tenth filtering cavity a10 and the twelfth filtering cavity a12 of the filtering branch 12 are in a row and are sequentially arranged along the first direction L.
The fifth filtering cavity a5 of the filtering branch 12 is further respectively disposed adjacent to the second filtering cavity a2, the third filtering cavity A3, the fourth filtering cavity a4 and the sixth filtering cavity a6, and the eighth filtering cavity A8 of the filtering branch 12 is further respectively disposed adjacent to the seventh filtering cavity a7, the ninth filtering cavity a9, the tenth filtering cavity a10 and the eleventh filtering cavity a 11. Twelve filter cavities 121 of the filter branch 12 are regularly arranged and compactly distributed, so that the layout and miniaturization are facilitated, and the stability is high.
With continued reference to fig. 2, the first filtering cavity a1 and the third filtering cavity A3, the fourth filtering cavity a4 and the sixth filtering cavity a6, and the eighth filtering cavity A8 and the tenth filtering cavity a10 of the filtering branch 12 are inductively cross-coupled to form three inductive cross-coupling zeros, respectively.
Specifically, first windows are respectively disposed between the first filter cavity a1 and the third filter cavity A3, between the fourth filter cavity a4 and the sixth filter cavity A6, and between the eighth filter cavity A8 and the tenth filter cavity a10, so that inductive cross coupling is respectively realized between the first filter cavity a1 and the third filter cavity A3, between the fourth filter cavity a4 and the sixth filter cavity A6, and between the eighth filter cavity A8 and the tenth filter cavity a10, so as to form an inductive cross coupling zero point.
Capacitive cross coupling is respectively formed between the fourth filter cavity a4 and the seventh filter cavity a7, and between the eighth filter cavity A8 and the eleventh filter cavity a11 of the filter branch 12, so that two capacitive cross coupling zeros are formed.
Specifically, first windows may be respectively disposed between the fourth filter cavity a4 and the seventh filter cavity a7, and between the eighth filter cavity A8 and the eleventh filter cavity a11, and capacitive cross-coupling elements 14 may be disposed in the first windows, and capacitive cross-coupling may be implemented between the fourth filter cavity a4 and the seventh filter cavity a7, and between the eighth filter cavity A8 and the eleventh filter cavity a11 through the capacitive cross-coupling elements 14, so as to form capacitive cross-coupling zeros.
The capacitive cross-coupling element 14 may be a flying rod 14, i.e. the filter 10 further comprises a flying rod 14. The flying bar 14 may be a dumbbell-shaped metal bar, as shown in fig. 2 and 5, and fig. 5 is a schematic structural diagram of an embodiment of the filter flying bar of the present application. The flying rods 14 are respectively disposed between the fourth filter cavity a4 and the seventh filter cavity a7, and between the eighth filter cavity A8 and the eleventh filter cavity a11 of the filtering branch 12, as shown in fig. 5, each flying rod 14 may include a coupling probe 141 and a supporting clamping seat 142, each supporting clamping seat 142 may be respectively fixed to a first window between the fourth filter cavity a4 and the seventh filter cavity a7 and a first window between the eighth filter cavity A8 and the eleventh filter cavity a11, and each coupling probe 141 is respectively suspended between the fourth filter cavity a4 and the seventh filter cavity a7, and between the eighth filter cavity A8 and the eleventh filter cavity a 11.
The inductive cross coupling and the capacitive cross coupling can realize zero point suppression, so that the debugging index is convenient, and the designed filter meets the parameter requirement.
In addition, as shown in fig. 1 and 2, the filter 10 further includes a metal coupling rib 15, the metal coupling rib 15 may be disposed between the eleventh filter cavity a11 and the twelfth filter cavity a12 of the filter branch 12, and the metal coupling rib 15 may enhance the coupling effect between the eleventh filter cavity a11 and the twelfth filter cavity a 12.
Optionally, the housing 11 is further provided with a first port (not shown) and a second port (second port), the first port is connected to the first filter cavity a1 of the filter branch 12, and the second port is connected to the twelfth filter cavity a12 of the filter branch 12. Wherein the first port and the second port may both be taps of the filter 10.
Referring to fig. 6 and 7, fig. 6 is a schematic circuit diagram of an embodiment of the filter of the present application, and fig. 7 is a schematic simulation result diagram of the embodiment of the filter of the present application. The filter in this embodiment may first establish the topology shown in fig. 3, then establish a circuit model (shown in fig. 6) corresponding to the topology, and then perform circuit diagram simulation on the circuit model, and adjust the frequency of the filter cavity and the coupling frequency between the filter cavities, so that the result of the circuit simulation satisfies that the bandwidth of the filter branch 12 is in the range of 2300MHz to 2395 MHz.
As shown in fig. 7, the filter branch is shown as a first curve 20 in fig. 7, with a bandwidth between 2300MHz and 2395 MHz. The first curve 20 includes four cross-coupling zeros, which are a zero B1, a zero B2, a zero B3, and a zero B4, so that 4 strong suppression transmission zeros can be formed in the filtering branch 12, and the high end and the low end of the passband of the filter 10 have a strong suppression function, so that the strong anti-interference capability on the environmental noise can be realized, and the communication system is ensured not to be interfered by the spurious signals in the environment.
It should be noted that the parameters (e.g., frequency point and suppression) of two or more coupling zeros of the present application may be the same; in the simulation diagram, the coupling zeros of the same parameters are shown as the same coupling zeros.
In addition, the parameter index of the filter 10 in this embodiment may satisfy the following characteristics, except that the passband range is 2300MHz to 2395 MHz: 1) the average insertion loss is small, and the average insertion loss of any 5MHz is less than 1.42 dB; 2) the temperature drift fluctuation is small, and the passband offset within the range of-15 to 100 ℃ is less than 100 KHz; 3) the power capacity is large, and the bearing power at normal temperature and normal pressure is greater than 3700W. The filter 10 of the present embodiment has a small loss and a large power capacity, and therefore can ensure efficient and stable operation of the communication module.
According to the parameters, the filter of the embodiment has stable performance, low insertion loss and high suppression degree, can be applied to a mobile communication base station, and can meet the characteristics of high-speed and high-efficiency signal transmission of the current novel 5G mobile communication system.
The embodiment provides the filter, the filter branches are divided into two rows arranged along the second direction, the filter cavities are regularly arranged and compactly distributed, and the maximum utilization rate of space is realized; the structure design is simple, the stability of the structure and the electrical property is good, the cost is low, and the mass production is facilitated; five cross coupling zero points are formed on the filtering branch, so that zero point suppression can be realized, and the debugging index is convenient; the filter is also provided with a first tuning rod and a second tuning rod respectively, and the first tuning rod and the second tuning rod are used for adjusting the frequency of the filter cavity and the coupling frequency between the filter cavities respectively, so that parameter indexes can be flexibly adjusted, and the intermodulation of the zero point is improved.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a communication device according to the present application. The communication device 30 may include an antenna 31 and a Radio frequency Unit 32 (RRU) connected to the antenna 31, where the Radio frequency Unit 32 includes the filter 10 shown in the above embodiment, and the filter 10 may be used to filter a Radio frequency signal. Therefore, the bandwidth of the filtering branch 12 of the communication device 30 is in the range of 2300MHz to 2395MHz, which can meet the design requirement.
The communication device 30 may be a base station through which a terminal may communicate with other terminals. In other embodiments, the rf Unit 32 and the Antenna 31 may be integrally designed to form an Active Antenna Unit (AAU).
Some embodiments of the present application are filters, which may also be referred to as combiners, i.e., dual-frequency combiners. It is understood that in other embodiments, the duplexer may be referred to as a duplexer.
It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. In addition, for convenience of description, only a part of structures related to the present application, not all of the structures, are shown in the drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A filter, characterized in that the filter comprises:
a housing having a first direction and a second direction perpendicular to each other;
the filtering branch circuit is arranged in the shell and consists of twelve filtering cavities which are sequentially coupled, and the twelve filtering cavities of the filtering branch circuit form five cross-coupling zero points;
the filtering branches are divided into two rows arranged along the second direction, and the bandwidth of each filtering branch is located in the range of 2300 MHz-2395 MHz.
2. The filter of claim 1, wherein the filter cavity comprises:
a cavity;
the resonance rod is accommodated in the cavity and comprises a side wall and a hollow inner cavity formed by the side wall;
a first tuning rod, one end of the first tuning rod disposed within the hollow interior.
3. The filter of claim 2,
two of coupling in proper order be provided with first window between the filtering chamber, the wave filter still includes the second tuning rod, sets up first window department, the second tuning rod is used for adjusting two of coupling in proper order coupling the coupling bandwidth between the filtering chamber.
4. The filter of claim 3,
the first filtering cavity, the third filtering cavity, the fourth filtering cavity, the seventh filtering cavity, the eighth filtering cavity and the eleventh filtering cavity of the filtering branch are in a row and are sequentially arranged along the first direction;
and the second filtering cavity, the fifth filtering cavity, the sixth filtering cavity, the ninth filtering cavity, the tenth filtering cavity and the twelfth filtering cavity of the filtering branch are in a row and are sequentially arranged along the first direction.
5. The filter of claim 4,
the fifth filtering cavity of the filtering branch is further respectively adjacent to the second filtering cavity, the third filtering cavity, the fourth filtering cavity and the sixth filtering cavity, and the eighth filtering cavity of the filtering branch is further respectively adjacent to the seventh filtering cavity, the ninth filtering cavity, the tenth filtering cavity and the eleventh filtering cavity.
6. The filter of claim 5,
inductive cross coupling is respectively carried out between the first filtering cavity and the third filtering cavity, between the fourth filtering cavity and the sixth filtering cavity and between the eighth filtering cavity and the tenth filtering cavity of the filtering branch circuit so as to form three inductive cross coupling zero points;
and capacitive cross coupling is respectively performed between the fourth filtering cavity and the seventh filtering cavity and between the eighth filtering cavity and the eleventh filtering cavity of the filtering branch circuit so as to form two capacitive cross coupling zeros.
7. The filter of claim 6, further comprising a metal coupling rib, wherein the metal coupling rib is disposed between the eleventh filtering cavity and the twelfth filtering cavity of the filtering branch.
8. The filter according to claim 7, wherein the filter further comprises a flying bar, the flying bar is respectively disposed between the fourth filtering cavity and the seventh filtering cavity, and between the eighth filtering cavity and the eleventh filtering cavity of the filtering branch, the flying bar comprises a coupling probe and a supporting clamping seat, the supporting clamping seat is respectively fixed on a first window between the fourth filtering cavity and the seventh filtering cavity and a first window between the eighth filtering cavity and the eleventh filtering cavity, and the coupling probe is respectively suspended between the fourth filtering cavity and the seventh filtering cavity, and between the eighth filtering cavity and the eleventh filtering cavity.
9. The filter according to claim 8, characterized in that the housing is provided with a first port connected with the first filter cavity of the filter branch and a second port connected with the twelfth filter cavity of the filter branch.
10. A communication device, characterized in that the communication device comprises an antenna and a radio frequency unit connected to the antenna, the radio frequency unit comprising a filter according to any of claims 1-9 for filtering the radio frequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010409073.1A CN113675555A (en) | 2020-05-14 | 2020-05-14 | Communication device and filter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010409073.1A CN113675555A (en) | 2020-05-14 | 2020-05-14 | Communication device and filter thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113675555A true CN113675555A (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010409073.1A Pending CN113675555A (en) | 2020-05-14 | 2020-05-14 | Communication device and filter thereof |
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| CN (1) | CN113675555A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208782003U (en) * | 2018-07-20 | 2019-04-23 | 深圳市大富科技股份有限公司 | A kind of cross coupling structure and cavity body filter |
| CN209691911U (en) * | 2018-12-31 | 2019-11-26 | 深圳市大富科技股份有限公司 | A kind of duplexer and communication equipment |
| CN210015937U (en) * | 2019-07-23 | 2020-02-04 | 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 |
| CN210182538U (en) * | 2018-12-31 | 2020-03-24 | 深圳市大富科技股份有限公司 | Duplexer and communication equipment |
-
2020
- 2020-05-14 CN CN202010409073.1A patent/CN113675555A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208782003U (en) * | 2018-07-20 | 2019-04-23 | 深圳市大富科技股份有限公司 | A kind of cross coupling structure and cavity body filter |
| CN209691911U (en) * | 2018-12-31 | 2019-11-26 | 深圳市大富科技股份有限公司 | A kind of duplexer and communication equipment |
| CN210182538U (en) * | 2018-12-31 | 2020-03-24 | 深圳市大富科技股份有限公司 | Duplexer and communication equipment |
| CN210015937U (en) * | 2019-07-23 | 2020-02-04 | 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 |
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Application publication date: 20211119 |