Anti-interference combiner

Abstract

The utility model relates to the technical field of combiners, and discloses an anti-interference combiner which comprises a cavity, a cover plate, a GSM-R filter A, a band-pass filter A and a band-pass filter B. The cover plate is mounted at a box opening of the box body; the GSM-R filter A, the band-pass filter A and the band-pass filter B are all installed on the cover plate and located in the cavity, and a three-in-one combiner is formed by the combination of the GSM-R filter A, the band-pass filter A and the band-pass filter B. The GSM-R filter A, the band-pass filter A and the band-pass filter B are used for filtering signals of different frequency bands, and the GSM-R filter A, the band-pass filter A and the band-pass filter B are integrated on the cover plate and in the box body, so that the problem of frequency band interference of a public mobile GSM network is solved, and space occupation is reduced. Therefore, the anti-interference combiner can be conveniently installed in the rail car communication cabinet, and the mode of connecting the anti-interference combiner together through a jumper wire is avoided, so that the line loss is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of combiners, for example, to an anti-interference combiner. Background Art

[0002] At present, railway communications need to meet the requirements of multiple communication standards, so a combiner is needed in the cabinet to combine multiple signals and complete the communication through a shared antenna. The GSM-R frequency band used by the railway is 800MHz, of which 930-934MHz is used for downlink and 885-889MHz is used for uplink. The GSM network frequency band used by public mobile stations is 900MHZ, of which 935-954MHz is used for downlink and 890-909MHz is used for uplink. The two frequencies are very close, with only a 1MHz interval at the closest point. Therefore, in some areas, the railway GSM-R frequency band is very susceptible to interference from the public mobile GSM network frequency band. In order to solve this problem, an external GSM-R filter is generally used to solve this problem.

[0003] In the process of implementing the above embodiments, it is found that there are at least the following problems in the related art:

[0004] Although the problem of interference in the public mobile GSM network frequency band has been solved by external GSM-R filters, it has brought new problems. On the one hand, due to the compact space inside the rail vehicle communication cabinet, it is difficult to install the GSM-R filter inside and outside the railway communication equipment cabinet. On the other hand, since the GSM-R filter and the combiner need to be connected together through a jumper, the line loss is increased.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The disclosed embodiment provides an anti-interference combiner to solve new problems caused by interference in the public mobile GSM network frequency band.

[0008] In some embodiments, the anti-interference combiner includes: a cavity, the cavity including a box body and two first partitions connected to the inner wall of the box body, the two first partitions divide the interior of the box body into a connected first chamber, a second chamber and a third chamber; a cover plate, installed at the box mouth of the box body; a GSM-R filter A, installed on the cover plate and located inside the first chamber; a bandpass filter A, installed on the cover plate and located inside the second chamber; a bandpass filter B, installed on the cover plate and located inside the third chamber; wherein the GSM-R filter A, the bandpass filter A and the bandpass filter B are combined into a three-in-one combiner.

[0009] Optionally, the cavity also includes: a second partition connected to the inner wall of the box body, the second partition dividing the interior of the box body into independent two-way combining areas and three-way combining areas; a third partition connected to the inner wall of the box body and located in the two-way combining area, the third partition dividing the two-way combining area into a connected fourth chamber and a fifth chamber; wherein the first chamber, the second chamber and the third chamber are all located in the three-way combining area.

[0010] Optionally, it also includes: a GSM-R filter B, installed on the cover plate and located inside the fourth chamber; a bandpass filter C, installed on the cover plate and located inside the fifth chamber; wherein the GSM-R filter A, the GSM-R filter B, the bandpass filter A, the bandpass filter B and the bandpass filter C are combined into a five-in-two combiner.

[0011] Optionally, the GSM-R filter A and the GSM-R filter B both receive GSM-R frequency band signals; the bandpass filter A and the bandpass filter C both receive 400 / 450MHz frequency band signals; the bandpass filter B receives 800MHz frequency band signals; wherein the GSM-R filter A, the bandpass filter A and the bandpass filter B complete the signal combination of GSM-R, 400 / 450MHz and 800MHz frequency bands, and the GSM-R filter B and the bandpass filter C complete the signal combination of GSM-R and 400 / 450MHz frequency bands.

[0012] Optionally, the operating frequency range of the GSM-R filter A and the GSM-R filter B is 885-934 MHz; the operating frequency range of the bandpass filter A and the bandpass filter C is 403-469 MHz; and the operating frequency range of the bandpass filter B is 821-869 MHz.

[0013] Optionally, the GSM-R filter A, the GSM-R filter B, the bandpass filter A, the bandpass filter B and the bandpass filter C all include: resonant rods, which are evenly installed on the cover plate and are respectively located in the first chamber, the second chamber, the third chamber, the fourth chamber and the fifth chamber.

[0014] Optionally, it further includes: a dielectric sheet, which is respectively located in the second chamber and the fifth chamber and is respectively installed on each of the resonant rods.

[0015] Optionally, it also includes: a first SMA connector installed on the side wall of the box body, and the GSM-R filter A, the bandpass filter A and the bandpass filter B are connected to the first SMA connector after being combined through a tap piece; a second SMA connector installed on the side wall of the box body, and the GSM-R filter B and the bandpass filter C are connected to the second SMA connector after being combined through a tap piece; an N-to-SMA cable, respectively connected to the first SMA connector and the second SMA connector; an N-type connector, respectively connected to the receiving ends of the bandpass filter A, the bandpass filter B and the bandpass filter C and the two N-to-SMA cables.

[0016] Optionally, it further includes: a fixing plate connected to the bottom wall of the box body and located outside the box body; and a box body installed on the fixing plate and located inside and covering the box body.

[0017] Optionally, it also includes: a support plate connected to the bottom wall of the box body and located outside the box body; a shell installed on the support plate; and a panel installed between the support plate and the shell; wherein the support plate, the shell and the panel jointly surround the box body.

[0018] The anti-interference combiner provided in the embodiments of the present disclosure can achieve the following technical effects:

[0019] An anti-interference combiner provided by an embodiment of the present disclosure includes a cavity, a cover plate, a GSM-R filter A, a bandpass filter A and a bandpass filter B. The cavity is used to support, install and accommodate other components. The cavity includes a box body and two first partitions connected to the inner wall of the box body, and the two first partitions are used to divide the interior of the box body into different chambers. The two first partitions divide the interior of the box body into a connected first chamber, a second chamber and a third chamber, and the first chamber, the second chamber and the third chamber are respectively used to accommodate different components and prevent mutual interference between components in different chambers. The cover plate is installed at the box mouth of the box body, which is used to seal and support the installation of the GSM-R filter A, the bandpass filter A and the bandpass filter B. The GSM-R filter A is installed on the cover plate and is located inside the first chamber. It is used to receive frequency band signals and play a filtering role. The bandpass filter A is installed on the cover plate and is located inside the second chamber. It is also used to receive frequency band signals and play a filtering role. The bandpass filter B is installed on the cover plate and is located inside the third chamber. It is also used to receive frequency band signals and play a filtering role. Among them, the GSM-R filter A, the bandpass filter A and the bandpass filter B are combined into a three-in-one combiner.

[0020] The embodiment of the present disclosure provides an anti-interference combiner, which uses GSM-R filter A, bandpass filter A and bandpass filter B to filter signals of different frequency bands, and integrates GSM-R filter A, bandpass filter A and bandpass filter B on the cover plate and in the box body, thereby solving the problem of interference in the frequency band of the public mobile GSM network and reducing space occupation. That is, the anti-interference combiner can be easily installed inside the rail vehicle communication cabinet, and the method of connecting together through jumpers is avoided, thereby reducing line loss.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are considered similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 It is a structural schematic diagram of an anti-interference combiner provided by an embodiment of the present disclosure when a three-in-one combiner is used;

[0024] Figure 2 It is a structural schematic diagram of an anti-interference combiner provided by an embodiment of the present disclosure when a five-in-two combiner is used;

[0025] Figure 3is an internal functional diagram of an anti-interference combiner provided by an embodiment of the present disclosure when a five-in-two combiner is used;

[0026] Figure 4 is a functional principle diagram of an anti-interference combiner provided by an embodiment of the present disclosure when a three-in-one combiner is used;

[0027] Figure 5 It is a functional principle diagram of an anti-interference combiner provided by an embodiment of the present disclosure when a five-in-two combiner is used.

[0028] Reference numerals:

[0029] 1: cavity; 01: box body; 02: first partition; 03: second partition; 04: third partition; 2: cover plate; 3: GSM-R filter A; 4: band-pass filter A; 5: band-pass filter B; 6: GSM-R filter B; 7: band-pass filter C; 8: dielectric sheet; 9: first SMA connector; 10: second SMA connector; 11: N to SMA cable; 12: N-type connector; 13: fixing plate; 14: box body; 15: support plate; 16: shell; 17: panel. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0038] Combination Figures 1 to 5As shown, an embodiment of the present disclosure provides an anti-interference combiner, including a cavity 1, a cover plate 2, a GSM-R filter A3, a bandpass filter A4 and a bandpass filter B5. Cavity 1 is used to support, install and accommodate other components. Cavity 1 includes a box body 01 and two first partitions 02 connected to the inner wall of the box body 01, and the two first partitions 02 are used to divide the interior of the box body 01 into different chambers. The two first partitions 02 divide the interior of the box body 01 into a connected first chamber, a second chamber and a third chamber, and the first chamber, the second chamber and the third chamber are respectively used to accommodate different components and prevent mutual interference between components in different chambers. The cover plate 2 is installed at the box mouth of the box body 01 for sealing and supporting the installation of the GSM-R filter A3, the bandpass filter A4 and the bandpass filter B5. The GSM-R filter A3 is installed on the cover plate 2 and is located inside the first chamber for receiving frequency band signals and filtering. Bandpass filter A4 is installed on cover plate 2 and located inside the second chamber, and is also used to receive frequency band signals and play a filtering role. Bandpass filter B5 is installed on cover plate 2 and located inside the third chamber, and is also used to receive frequency band signals and play a filtering role. Among them, GSM-R filter A3, bandpass filter A4 and bandpass filter B5 are combined into a three-in-one combiner.

[0039] The anti-interference combiner provided in the embodiment of the present disclosure adopts GSM-R filter A3, bandpass filter A4 and bandpass filter B5 to filter signals of different frequency bands, and adopts the method of integrating GSM-R filter A3, bandpass filter A4 and bandpass filter B5 on cover plate 2 and in box body 01, thereby solving the problem of interference in the frequency band of public mobile GSM network and reducing space occupation. That is, the anti-interference combiner can be easily installed inside the communication cabinet of the rail vehicle, and the method of connecting together through jumpers is avoided, thereby reducing line loss.

[0040] Optionally, combined Figure 2 and Figure 3 As shown, the cavity 1 also includes a second partition 03 and a third partition 04. The second partition 03 is connected to the inner wall of the box body 01, and the second partition 03 divides the interior of the box body 01 into independent two-way merging areas and three-way merging areas. The third partition 04 is connected to the inner wall of the box body 01 and is located in the two-way merging area, and the third partition 04 divides the two-way merging area into a fourth chamber and a fifth chamber that are connected. Among them, the first chamber, the second chamber, and the third chamber are all located in the three-way merging area.

[0041] In the disclosed embodiment, the cavity 1 also includes a second partition 03 and a third partition 04 connected to the inner wall of the box body 01. The second partition 03 is used to separate the interior of the box body 01 into an independent two-way combining area and a three-way combining area. The two first partitions 02 are located in the three-way combining area and separate it into a connected first chamber, a second chamber, and a third chamber. The third partition 04 is located in the two-way combining area and separates it into a connected fourth chamber and a fifth chamber. The fourth chamber and the fifth chamber are respectively used to accommodate other components, while realizing other functions, avoiding interference with the GSM-R filter A3, the bandpass filter A4, and the bandpass filter B5.

[0042] Optionally, combined Figure 2 and Figure 3 As shown, it also includes a GSM-R filter B6 and a bandpass filter C7. The GSM-R filter B6 is installed on the cover plate 2 and is located inside the fourth chamber. The bandpass filter C7 is installed on the cover plate 2 and is located inside the fifth chamber. Among them, the GSM-R filter A3, the GSM-R filter B6, the bandpass filter A4, the bandpass filter B5 and the bandpass filter C7 are combined into a five-in-one two-way combiner.

[0043] In the disclosed embodiment, a GSM-R filter B6 and a bandpass filter C7 are also included which are installed on the cover plate 2 and are respectively located in the fourth chamber and the fifth chamber. The GSM-R filter B6 is also used to receive frequency band signals and plays a filtering role. The bandpass filter C7 is also used to receive frequency band signals and plays a filtering role. The GSM-R filter B6 and the bandpass filter C7 are combined with the GSM-R filter A3, the bandpass filter A4 and the bandpass filter B5 to form a five-in-two combiner. The five-in-two combiner is composed of two combiners in parallel, one of which is a three-in-one combiner and the other is a two-in-one combiner.

[0044] Optionally, combined Figure 4 and Figure 5 As shown, GSM-R filter A3 and GSM-R filter B6 both receive GSM-R frequency band signals. Bandpass filter A4 and bandpass filter C7 both receive 400 / 450MHz frequency band signals. Bandpass filter B5 receives 800MHz frequency band signals. Among them, GSM-R filter A3, bandpass filter A4 and bandpass filter B5 complete the signal combination of GSM-R, 400 / 450MHz and 800MHz frequency bands, and GSM-R filter B6 and bandpass filter C7 complete the signal combination of GSM-R and 400 / 450MHz frequency bands.

[0045] In the disclosed embodiment, the GSM-R filter A3, the bandpass filter A4 and the bandpass filter B5 complete the signal combination of the GSM-R, 400 / 450MHz and 800MHz frequency bands, so as to combine the three signals into one signal. The GSM-R filter B6 and the bandpass filter C7 complete the signal combination of the GSM-R and 400 / 450MHz frequency bands, so as to combine the two signals into one signal.

[0046] Optionally, combined Figure 4 and Figure 5 As shown, the operating frequency range of GSM-R filter A3 and GSM-R filter B6 is 885-934 MHz. The operating frequency range of bandpass filter A4 and bandpass filter C7 is 403-469 MHz. The operating frequency range of bandpass filter B5 is 821-869 MHz.

[0047] In the disclosed embodiment, GSM-R band signals are used for voice services and general packet data services, etc. 400 / 450MHz band signals are used for train wireless dispatch communication services and tail device data transmission services, etc. 800MHz band signals are used for tail and train safety warning services, etc.

[0048] Optionally, combined Figures 1 to 3 As shown, GSM-R filter A3, GSM-R filter B6, bandpass filter A4, bandpass filter B5 and bandpass filter C7 all include resonant rods. The resonant rods are evenly mounted on the cover plate 2 and are respectively located in the first cavity, the second cavity, the third cavity, the fourth cavity and the fifth cavity.

[0049] In the disclosed embodiment, the GSM-R filter A3, the GSM-R filter B6, the bandpass filter A4, the bandpass filter B5 and the bandpass filter C7 all include a resonant rod mounted on the cover plate 2. The resonant rods are respectively located in the first chamber, the second chamber, the third chamber, the fourth chamber and the fifth chamber, and are in the shape of a metal mushroom head. Together with the closed metal cavity 1, a resonant frequency is generated to achieve the frequency required by the filter. In the first chamber, there are six resonant rods in the uplink, a group of CQ combination structures, and two transmission zeros are generated on the left side of the passband to achieve suppression of the 800MHz frequency band. There are also six resonant rods in the downlink, a group of CQ combination structures, and two transmission zeros are generated on the right side of the passband to achieve suppression of public network mobile signals. In the second chamber, it is composed of a total of six resonant rods and a group of CQ combination structures, which generate two transmission zeros on the right side of the passband to achieve suppression of GSM-R signals. In the fourth chamber, it is composed of a total of four resonant rods, and a group of four completes filtering in the 400MHz / 450MHz frequency band. The fourth chamber is the same as the first chamber, and the fifth chamber is the same as the second chamber.

[0050] Optionally, combined Figures 1 to 3 As shown, it also includes a dielectric sheet 8. The dielectric sheet 8 is respectively located in the second chamber and the fifth chamber, and is respectively installed on each resonant rod.

[0051] In the disclosed embodiment, the bandpass filter A4 and the bandpass recorder C both include dielectric sheets 8 respectively located in the second chamber and the fifth chamber and respectively installed on each resonant rod. The operating frequency of the bandpass filter A4 and the bandpass filter C7 is 403-469 MHz, which is relatively low. Therefore, in order to reduce the operating frequency in a limited space, a dielectric sheet 8 made of polytetrafluoroethylene is installed on the resonant rod 4. Thereby shortening the height of the corresponding resonant rod to reduce the thickness of the cavity 1.

[0052] Optionally, combined Figure 1 and Figure 2 As shown, it also includes a first SMA connector 9, a second SMA connector 10, an N-to-SMA cable 11 and an N-type connector 12. The first SMA connector 9 is installed on the side wall of the box body 01, and the GSM-R filter A3, the bandpass filter A4 and the bandpass filter B5 are connected to the first SMA connector 9 after being combined through a tap. The second SMA connector 10 is installed on the side wall of the box body 01, and the GSM-R filter B6 and the bandpass filter C7 are connected to the second SMA connector 10 after being combined through a tap. The N-to-SMA cable 11 is connected to the first SMA connector 9 and the second SMA connector 10 respectively. The N-type connector 12 is connected to the receiving ends of the bandpass filter A4, the bandpass filter B5 and the bandpass filter C7 and the two N-to-SMA cables 11 respectively.

[0053] In the disclosed embodiment, a first SMA connector 9, a second SMA connector 10, an N-to-SMA cable 11 and an N-type connector 12 are also included. The tap piece is made of metal, and its shape is based on microwave three-dimensional electromagnetic simulation, and is used for combining. The first SMA connector 9 and the second SMA connector 10 are both used to transmit combined signals. The N-to-SMA cable 11 is used for connector conversion. So that the three signal receiving ends and the two signal output ends of the five-in-two combiner are all transmitted by the N-type connector 12, which is convenient for external cables or antennas.

[0054] Optionally, combined Figure 1 As shown, it also includes a fixing plate 13 and a box body 14. The fixing plate 13 is connected to the bottom wall of the box body 01 and is located outside the box body 01. The box body 14 is installed on the fixing plate 13 and is located and covered on the box body 01.

[0055] In the embodiment of the present disclosure, it also includes a fixing plate 13 connected to the bottom wall of the box body 01 and located outside the box body 01, and a box body 14 installed on the fixing plate 13 and located and covered on the box body 01. When it is a three-in-one combiner, the fixing plate 13 and the box body 14 jointly surround the cavity 1 and the cover plate 2 to protect the cavity 1 and the cover plate 2.

[0056] Optionally, combined Figure 3 As shown, the box body 01 further includes a support plate 15, a shell 16 and a panel 17. The support plate 15 is connected to the bottom wall of the box body 01 and is located outside the box body 01. The shell 16 is installed on the support plate 15. The panel 17 is installed between the support plate 15 and the shell 16. The support plate 15, the shell 16 and the panel 17 surround the box body 01 together.

[0057] In the embodiment of the present disclosure, it also includes a support plate 15 connected to the bottom wall of the box body 01 and located outside the box body 01, a shell 16 installed on the support plate 15, and a panel 17 installed between the support plate 15 and the shell 16. When it is in the form of a five-in-two combiner, the support plate 15, the shell 16 and the panel 17 jointly surround the cavity 1 and the cover plate 2 to protect the cavity 1 and the cover plate 2.

[0058] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An anti-interference combiner, characterized in that: include: A cavity, the cavity comprising a box body and two first partitions connected to the inner wall of the box body, the two first partitions dividing the interior of the box body into a first chamber, a second chamber and a third chamber that are connected; A cover plate, mounted on the box opening of the box body; A GSM-R filter A is mounted on the cover plate and is located inside the first chamber; A bandpass filter A, mounted on the cover plate and located inside the second chamber; a bandpass filter B, mounted on the cover plate and located inside the third chamber; The GSM-R filter A, the bandpass filter A and the bandpass filter B are combined into a three-in-one combiner.

2. The anti-interference combiner according to claim 1, characterized in that: The cavity further comprises: A second partition is connected to the inner wall of the box body, and the second partition divides the interior of the box body into an independent two-way combining area and a three-way combining area; A third partition plate is connected to the inner wall of the box body and is located in the two-way junction area, and the third partition plate divides the two-way junction area into a fourth chamber and a fifth chamber that are connected; Wherein, the first chamber, the second chamber and the third chamber are all located in the three-way combining area.

3. The anti-interference combiner according to claim 2, characterized in that: Also includes: A GSM-R filter B is mounted on the cover plate and is located inside the fourth chamber; a bandpass filter C, mounted on the cover plate and located inside the fifth chamber; The GSM-R filter A, the GSM-R filter B, the bandpass filter A, the bandpass filter B and the bandpass filter C are combined into a five-in-two combiner.

4. The anti-interference combiner according to claim 2, characterized in that: The GSM-R filter A and the GSM-R filter B both receive GSM-R frequency band signals; The band-pass filter A and the band-pass filter C both receive 400 / 450MHz frequency band signals; The bandpass filter B receives 800MHz frequency band signals; Among them, the GSM-R filter A, the bandpass filter A and the bandpass filter B complete the signal combination of GSM-R, 400 / 450MHz and 800MHz frequency bands, and the GSM-R filter B and the bandpass filter C complete the signal combination of GSM-R and 400 / 450MHz frequency bands.

5. The anti-interference combiner according to claim 2, characterized in that: The operating frequency range of the GSM-R filter A and the GSM-R filter B is 885-934 MHz; The operating frequency range of the bandpass filter A and the bandpass filter C is 403-469 MHz; The operating frequency range of the bandpass filter B is 821-869 MHz.

6. The anti-interference combiner according to claim 2, characterized in that: The GSM-R filter A, the GSM-R filter B, the bandpass filter A, the bandpass filter B and the bandpass filter C all include: The resonant rods are evenly mounted on the cover plate and are respectively located in the first chamber, the second chamber, the third chamber, the fourth chamber and the fifth chamber.

7. The anti-interference combiner according to claim 6, characterized in that: Also includes: The dielectric sheets are respectively located in the second chamber and the fifth chamber and are respectively installed on each of the resonant rods.

8. The anti-interference combiner according to claim 2, characterized in that: Also includes: A first SMA connector is installed on the side wall of the box body, and the GSM-R filter A, the bandpass filter A and the bandpass filter B are connected to the first SMA connector after being combined through a tap sheet; A second SMA connector is installed on the side wall of the box body, and the GSM-R filter B and the bandpass filter C are connected to the second SMA connector after being combined through a tap plate; N-to-SMA cables, connected to the first SMA connector and the second SMA connector respectively; The N-type connector is respectively connected to the receiving ends of the bandpass filter A, the bandpass filter B, and the bandpass filter C and the two N-to-SMA cables.

9. The anti-interference combiner according to claim 1, characterized in that: Also includes: A fixing plate connected to the bottom wall of the box body and located outside the box body; The box body is installed on the fixing plate and is located on and covers the box body.

10. The anti-interference combiner according to claim 2, characterized in that: Also includes: A support plate connected to the bottom wall of the box body and located outside the box body; A housing, mounted on the support plate; A panel, installed between the support plate and the shell; Wherein, the support plate, the shell and the panel together surround the box body.

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