CN215578999U - Low-frequency high-isolation antenna combiner - Google Patents
Low-frequency high-isolation antenna combiner Download PDFInfo
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- CN215578999U CN215578999U CN202122325730.7U CN202122325730U CN215578999U CN 215578999 U CN215578999 U CN 215578999U CN 202122325730 U CN202122325730 U CN 202122325730U CN 215578999 U CN215578999 U CN 215578999U
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Abstract
The utility model provides a low-frequency high-isolation antenna combiner, and relates to the technical field of communication. In the low-frequency high-isolation antenna combiner, a first group of coaxial resonators form a first filter, the first filter is connected with a first frequency band interface and a common cavity, a second group of coaxial resonators form a second filter, the second filter is connected with a second frequency band interface and the common cavity, the common cavity is connected with a common end interface, and the passband of the first filter is smaller than that of the second filter; the coaxial resonator comprises a first component and a second component which are matched with each other, the first component is tubular, the second component comprises a sleeve with one end sealed and a circular ring extending outwards from the opening side of the sleeve, and the sleeve is sleeved in the first component; the capacitive flying bar forms a cross coupling with two coaxial resonators in the second filter. The technical scheme of the utility model can enable the antenna combiner to realize lower frequency, and the two working channels have higher isolation.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a low-frequency high-isolation antenna combiner.
Background
In a mobile communication system, a large number of transmitting and receiving devices are concentrated in a base station operating in multiple channels, and if each transmitting and receiving device uses one antenna, it is not practical in the aspects of economy, technology, field utilization and the like no matter whether the transmitting and receiving devices are erected on the same pole or arranged on different poles, and therefore, the antenna sharing is widely used in mobile communication. A circuit or device that allows two transmitters to share an antenna without adversely affecting each other is called an antenna combiner.
The inventor finds that the antenna combiner in the prior art cannot realize lower frequency, and the isolation between the two working channels is smaller, so that the requirement of practical application cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low-frequency high-isolation antenna combiner, which can realize lower frequency of the antenna combiner and has higher isolation between two working channels.
The utility model provides a low-frequency high-isolation antenna combiner, which adopts the following technical scheme:
the low frequency high isolation antenna combiner includes: the device comprises a cavity, a cover plate, a common end interface, a first frequency band interface, a second frequency band interface, a plurality of coaxial resonators, a common cavity and at least one capacitive flying rod; wherein the content of the first and second substances,
the cavity comprises a side wall, the cover plate covers the cavity, and the public end interface, the first frequency band interface and the second frequency band interface are all arranged on the side wall of the cavity;
the plurality of coaxial resonators are arranged in the cavity and divided into two groups, the first group of coaxial resonators forms a first filter, the first filter is connected with the first frequency band interface and the common cavity, the second group of coaxial resonators forms a second filter, the second filter is connected with the second frequency band interface and the common cavity, the common cavity is connected with the common end interface, and the pass band of the first filter is smaller than that of the second filter;
the coaxial resonator comprises a first component and a second component which are matched with each other, the first component is tubular, the second component comprises a sleeve with one end sealed and a circular ring extending outwards from the opening side of the sleeve, and the sleeve is sleeved in the first component;
the capacitive flying bar forms a cross coupling with two of the coaxial resonators in the second filter.
Optionally, the coaxial resonator is provided with an adjusting bolt, a first adjusting hole is formed in a sealing position of the sleeve, a second adjusting hole is formed in the cover plate, and the first adjusting hole and the second adjusting hole are used for exposing the adjusting bolt.
Optionally, the low-frequency high-isolation antenna combiner includes 16 coaxial resonators, a first coaxial resonator to an eighth coaxial resonator connected in sequence form the first filter, a ninth coaxial resonator to the sixteenth coaxial resonator connected in sequence form the second filter, the first coaxial resonator and the ninth coaxial resonator are connected to the common cavity, the eighth coaxial resonator is connected to the first frequency band interface, and the sixteenth coaxial resonator is connected to the second frequency band interface.
Optionally, the low frequency high isolation antenna combiner comprises two capacitive booms; one of the capacitive fly rods is positioned between a tenth coaxial resonator and a twelfth coaxial resonator and forms cross coupling with the tenth coaxial resonator and the twelfth coaxial resonator; and the other capacitive flying bar is positioned between the fourteenth coaxial resonator and the sixteenth coaxial resonator and forms cross coupling with the fourteenth coaxial resonator and the sixteenth coaxial resonator.
Optionally, the capacitive flybar is dumbbell-shaped.
Optionally, the passband of the first filter is 703MHz to 803MHz, and the passband of the second filter is 905MHz to 960 MHz.
Optionally, the common port, the first band port, and the second band port each include an RG402 coaxial cable and a cable connector; the three cable joints are all connected outside the side wall of the cavity in a threaded manner; a first one of the RG402 coaxial cables passes through a first one of the cable lugs, connects to the common cavity, and is soldered to the first one of the cable lugs; a second of said RG402 coaxial cables is routed through a second of said cable connectors, connected to said first filter, and soldered to a second of said cable connectors; a third of the RG402 coaxial cables is routed through a third of the cable lugs, connected to the second filter, and soldered to a third of the cable lugs.
Optionally, the cable connector is made of brass silver plating.
Optionally, the cavity, the cover plate, the common port, the first band port, the second band port, the coaxial resonator, and the common cavity are all made of aluminum alloy.
The utility model provides a low-frequency high-isolation antenna combiner, which comprises a plurality of coaxial resonators, wherein the plurality of coaxial resonators are divided into two groups, the first group of coaxial resonators form a first filter, the second group of coaxial resonators form a second filter, on one hand, the coaxial resonators comprise a first part and a second part which are matched with each other, the first part is tubular, the second part comprises a sleeve with one end sealed and a ring which extends outwards from the opening side of the sleeve, the sleeve is sleeved in the first part, compared with the coaxial resonators in the prior art, a larger capacitor can be formed between the ring and a cavity and/or a cover plate of the coaxial resonators, and the passing frequency of the filter formed by the coaxial resonators can be further reduced, therefore, the antenna combiner can realize lower frequency, on the other hand, the low-frequency high-isolation antenna combiner comprises at least one capacitive flying rod, the capacitive flying rod and the two coaxial resonators in the second filter with the higher passband form cross coupling, the working channel of the second filter can be steeper through the cross coupling, and then the isolation of the working channel of the second filter to the working channel of the first filter is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective structural view of a low-frequency high-isolation antenna combiner according to an embodiment of the present invention;
fig. 2 is a top view of an internal structure of a cavity of the outdoor broadband combiner according to the embodiment of the present invention;
fig. 3 is a bottom view of an internal structure of a cavity of the outdoor broadband combiner according to the embodiment of the present invention;
fig. 4 is a block diagram of a first component of a coaxial resonator provided by an embodiment of the utility model;
fig. 5 is a perspective view of a second component of the coaxial resonator provided by the embodiment of the present invention;
fig. 6 is a top view of a second component of a coaxial resonator provided by an embodiment of the utility model;
FIG. 7 is a diagram illustrating the position relationship between a capacitive fly rod and a coaxial resonator according to an embodiment of the present invention;
FIG. 8 is a block diagram of a cover plate provided in an embodiment of the present invention;
FIG. 9 is a block diagram of a capacitive fly rod provided by an embodiment of the present invention;
FIG. 10 is a block diagram of a fly rod support provided by an embodiment of the utility model;
fig. 11 is a block diagram of a common port according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
It should be noted that the technical features in the embodiments of the present invention may be combined with each other without conflict.
An embodiment of the present invention provides a low-frequency high-isolation antenna combiner, specifically, as shown in fig. 1 to 7, fig. 1 is a three-dimensional structural diagram of a low-frequency high-isolation antenna combiner provided in an embodiment of the present invention, fig. 2 is a top view of an internal structure of a cavity of an outdoor wideband combiner provided in an embodiment of the present invention, fig. 3 is a bottom view of an internal structure of a cavity of an outdoor wideband combiner provided in an embodiment of the present invention, fig. 4 is a structural diagram of a first component of a coaxial resonator provided in an embodiment of the present invention, fig. 5 is a three-dimensional structural diagram of a second component of a coaxial resonator provided in an embodiment of the present invention, fig. 6 is a top view of a second component of a coaxial resonator provided in an embodiment of the present invention, fig. 7 is a positional relationship diagram of a capacitive flying bar and a coaxial resonator provided in an embodiment of the present invention, and the low-frequency high-isolation antenna combiner includes: the capacitive flying bar comprises a cavity body 10, a cover plate 20, a public end interface 30, a first frequency band interface 40, a second frequency band interface 50, a plurality of coaxial resonators 60, a public cavity 70 and at least one capacitive flying bar 80; wherein the content of the first and second substances,
the cavity 10 comprises a side wall, the cover plate 20 covers the cavity 10, and the common port interface 30, the first frequency band interface 40 and the second frequency band interface 50 are all arranged on the side wall of the cavity 10;
the plurality of coaxial resonators 60 are arranged in the cavity 10, the plurality of coaxial resonators 60 are divided into two groups, the first group of coaxial resonators 60 form a first filter, the first filter is connected with the first frequency band interface 40 and the common cavity 30, the second group of coaxial resonators 60 form a second filter, the second filter is connected with the second frequency band interface 50 and the common cavity 70, the common cavity 70 is connected with the common end interface 30, and the passband of the first filter is smaller than that of the second filter;
the coaxial resonator 60 comprises a first part 61 and a second part 62 which are matched with each other, wherein the first part 61 is tubular, the second part 62 comprises a sleeve 621 with one end sealed and a circular ring 622 extending outwards from the open side of the sleeve 621, and the sleeve 621 is sleeved in the first part 61;
the capacitive fly rod 80 forms a cross coupling with the two coaxial resonators 60 in the second filter.
On the one hand, the coaxial resonator in the prior art does not include the circular ring, and compared with the coaxial resonator in the prior art, the circular ring 622 of the coaxial resonator 60 having the above structure and the cavity 10 and/or the cover plate 20 can form a larger capacitance, and thus the pass frequency of the filter composed of the circular ring 622 and the cavity can be reduced, and therefore, the antenna combiner can realize a lower frequency.
On the other hand, because the low-frequency high-isolation antenna combiner comprises at least one capacitive flying rod 80, the capacitive flying rod 80 and the two coaxial resonators 60 in the second filter with a higher passband form cross coupling, the working channel of the second filter can be steeper through the cross coupling, and the isolation of the working channel of the second filter to the working channel of the first filter is further improved. Experiments prove that the isolation between the working channel of the second filter and the working channel of the first filter can reach 85 dB.
The following embodiments of the present invention will describe each structure of the above low-frequency high-isolation antenna combiner in detail. For reasons of space limitation, details of the structure not mentioned may be referred to in the prior art and will not be described herein.
Optionally, as shown in fig. 1, fig. 2, fig. 6, and fig. 8, fig. 8 is a structural diagram of a cover plate according to an embodiment of the present invention, in the embodiment of the present invention, an adjusting bolt 63 is disposed on a coaxial resonator 60, a first adjusting hole 623 is disposed at a sealing position of a sleeve 621, a second adjusting hole 21 is disposed on the cover plate 20, the first adjusting hole 623 and the second adjusting hole 21 are used for exposing the adjusting bolt 63, a relative position between the second part 62 of the coaxial resonator 60 and the cavity 10 and/or the cover plate 20 can be adjusted by changing the adjusting bolt 63 without detaching the cover plate 20, and then a size of a capacitance formed between the ring 622 of the coaxial resonator 60 and the cavity 10 and/or the cover plate 20 is adjusted, so as to adjust a coupling effect between the coaxial resonators 60, and adjust a pass frequency of a filter formed by the coaxial resonator 60.
Optionally, the first part 61 and the cavity 10 are integrally formed, so that the process is simple, the interface stability between the first part and the cavity can be improved, and the consistency of the low-frequency high-isolation antenna combiner is improved.
Optionally, as shown in fig. 2, the low-frequency high-isolation antenna combiner in the embodiment of the present invention includes 16 coaxial resonators, where a first coaxial resonator to an eighth coaxial resonator (8 coaxial resonators 60 located at the top in fig. 2) connected in sequence form a first filter, a ninth coaxial resonator to a sixteenth coaxial resonator (8 coaxial resonators 60 located at the bottom in fig. 2) connected in sequence form a second filter, the first coaxial resonator and the ninth coaxial resonator are connected to the common cavity 70, the eighth coaxial resonator is connected to the first frequency band interface 40, and the sixteenth coaxial resonator is connected to the second frequency band interface 50.
Optionally, the passband of the first filter is 703MHz to 803MHz, and the passband of the second filter is 905MHz to 960 MHz.
Alternatively, as shown in fig. 7 and 9, fig. 9 is a structural diagram of the capacitive fly bar provided in the embodiment of the present invention, and the capacitive fly bar 80 is dumbbell-shaped, that is, the capacitive fly bar 80 includes two cylinders connected by a connecting rod, and the bottom surfaces of the two cylinders far from the connecting rod are disposed near the coaxial resonator 60. The relative area between the capacitive flying bar 80 with the structure and the coaxial resonator 60 is large, and the cross coupling effect is more obvious.
Illustratively, as shown in fig. 7 and 10, fig. 10 is a structural diagram of a fly rod support according to an embodiment of the present invention, in which a capacitive fly rod 80 is fixed between two coaxial resonators 60 by a fly rod support 90 to form a cross coupling. Specifically, the flying bar support 90 may cooperate with an insulating base to secure the capacitive flying bar 80.
Optionally, as shown in fig. 2 and 3, in the embodiment of the present invention, the low-frequency high-isolation antenna combiner includes two capacitive flying rods 80; a capacitive fly rod 80 is positioned between the tenth coaxial resonator and the twelfth coaxial resonator and forms cross coupling with the tenth coaxial resonator and the twelfth coaxial resonator; and the other capacitive flying bar is positioned between the fourteenth coaxial resonator and the sixteenth coaxial resonator and forms cross coupling with the fourteenth coaxial resonator and the sixteenth coaxial resonator. That is, one capacitive flying bar 80 is located between two originally non-interacting coaxial resonators 60 on the side of the second filter close to the common cavity 70, and the other capacitive flying bar 80 is located between two originally non-interacting coaxial resonators 60 on the side of the second filter close to the second band port 50, so that the isolation of the working channel of the second filter to the working channel of the first filter can be further improved.
Alternatively, as shown in fig. 2 and 11, fig. 11 is a structural diagram of the common-end interface provided by the embodiment of the present invention, the common-end interface 30 includes an RG402 coaxial cable 31 and a cable connector 32, the cable connector 32 is screwed outside the sidewall of the cavity 10, the RG402 coaxial cable 31 passes through the cable connector 32 and is connected with the common cavity 70, and the RG402 coaxial cable 31 is fixed to the cable connector 32 by welding. Similarly, the first frequency band interface 40 also includes an RG402 coaxial cable and a cable connector, the cable connector is screwed outside the sidewall of the cavity 10, the RG402 coaxial cable passes through the cable connector to connect with the first filter, and the RG402 coaxial cable is soldered to the cable connector. The second band interface 50 also includes an RG402 coaxial cable and a cable connector, the cable connector is screwed outside the sidewall of the cavity 10, the RG402 coaxial cable passes through the cable connector and is connected to the second filter, and the RG402 coaxial cable is soldered to the cable connector. Because RG402 coaxial cable passes through cable joint and is connected with cavity 10 inner structure (public chamber, first wave filter or second wave filter), if when the in-process such as debugging, test goes wrong, directly tear cable joint down can, can not lead to the fact destruction to cavity 10, can help reduction in production cost.
Optionally, in the embodiment of the present invention, the cable connector is made of silver-plated brass material, which not only has better conductivity, but also is easy to weld.
Optionally, in the embodiment of the present invention, the cavity 10, the cover plate 20, the common port 30, the first band port 40, the second band port 50, the coaxial resonator 60, and the common cavity 70 are all made of an aluminum alloy. The aluminum alloy has lower cost, better conductivity and no magnetism, is favorable for ensuring that the outdoor broadband combiner has better performance and has lower cost.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A low frequency high isolation antenna combiner, comprising: the device comprises a cavity, a cover plate, a common end interface, a first frequency band interface, a second frequency band interface, a plurality of coaxial resonators, a common cavity and at least one capacitive flying rod; wherein the content of the first and second substances,
the cavity comprises a side wall, the cover plate covers the cavity, and the public end interface, the first frequency band interface and the second frequency band interface are all arranged on the side wall of the cavity;
the plurality of coaxial resonators are arranged in the cavity and divided into two groups, the first group of coaxial resonators forms a first filter, the first filter is connected with the first frequency band interface and the common cavity, the second group of coaxial resonators forms a second filter, the second filter is connected with the second frequency band interface and the common cavity, the common cavity is connected with the common end interface, and the pass band of the first filter is smaller than that of the second filter;
the coaxial resonator comprises a first component and a second component which are matched with each other, the first component is tubular, the second component comprises a sleeve with one end sealed and a circular ring extending outwards from the opening side of the sleeve, and the sleeve is sleeved in the first component;
the capacitive flying bar forms a cross coupling with two of the coaxial resonators in the second filter.
2. The low frequency high isolation antenna combiner of claim 1, wherein the coaxial resonator is provided with an adjusting bolt, a first adjusting hole is provided at a sealing of the sleeve, a second adjusting hole is provided on the cover plate, and the first adjusting hole and the second adjusting hole are used for exposing the adjusting bolt.
3. The low frequency high isolation antenna combiner of claim 1, wherein the low frequency high isolation antenna combiner comprises 16 of the coaxial resonators, a first coaxial resonator through an eighth coaxial resonator connected in sequence form the first filter, a ninth coaxial resonator through the sixteenth coaxial resonator connected in sequence form the second filter, the first coaxial resonator and the ninth coaxial resonator are connected to the common cavity, the eighth coaxial resonator is connected to the first band interface, and the sixteenth coaxial resonator is connected to the second band interface.
4. The low frequency high isolation antenna combiner of claim 3, wherein the low frequency high isolation antenna combiner comprises two of the capacitive booms; one of the capacitive fly rods is positioned between a tenth coaxial resonator and a twelfth coaxial resonator and forms cross coupling with the tenth coaxial resonator and the twelfth coaxial resonator; and the other capacitive flying bar is positioned between the fourteenth coaxial resonator and the sixteenth coaxial resonator and forms cross coupling with the fourteenth coaxial resonator and the sixteenth coaxial resonator.
5. The low frequency high isolation antenna combiner of claim 4, wherein the capacitive fly bars are dumbbell shaped.
6. The low frequency high isolation antenna combiner of claim 1, wherein the passband of the first filter is 703MHz to 803MHz, and the passband of the second filter is 905MHz to 960 MHz.
7. The low frequency high isolation antenna combiner of claim 1, wherein the common port interface, the first band interface, and the second band interface each comprise an RG402 coaxial cable and cable connector; the three cable joints are all connected outside the side wall of the cavity in a threaded manner; a first one of the RG402 coaxial cables passes through a first one of the cable lugs, connects to the common cavity, and is soldered to the first one of the cable lugs; a second of said RG402 coaxial cables is routed through a second of said cable connectors, connected to said first filter, and soldered to a second of said cable connectors; a third of the RG402 coaxial cables is routed through a third of the cable lugs, connected to the second filter, and soldered to a third of the cable lugs.
8. The low frequency, high isolation antenna combiner of claim 7, wherein the cable tabs are brass silver plated.
9. The low frequency high isolation antenna combiner of claim 1, wherein the cavity, the cover plate, the common port interface, the first band interface, the second band interface, the coaxial resonator, and the common cavity are all made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325730.7U CN215578999U (en) | 2021-09-24 | 2021-09-24 | Low-frequency high-isolation antenna combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325730.7U CN215578999U (en) | 2021-09-24 | 2021-09-24 | Low-frequency high-isolation antenna combiner |
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| Publication Number | Publication Date |
|---|---|
| CN215578999U true CN215578999U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122325730.7U Active CN215578999U (en) | 2021-09-24 | 2021-09-24 | Low-frequency high-isolation antenna combiner |
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| CN (1) | CN215578999U (en) |
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- 2021-09-24 CN CN202122325730.7U patent/CN215578999U/en active Active
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