Microwave combiner based on waveguide bridge

Abstract

The utility model provides a microwave combiner based on a waveguide bridge, which relates to the technical field of microwave passive devices and comprises a lower cavity and an upper cover plate which are detachably connected. The lower cavity is divided into a first waveguide cavity and a second waveguide cavity through a central wall, and the first waveguide cavity and the second waveguide cavity form a waveguide bridge; the lower cavity is provided with a first port, a second port and a third port, the first port is set as an output port, and the second port and the third port are set as input ports; one end of the first waveguide cavity is connected with the first port, and the other end is connected with the third port; the second waveguide cavity is connected with the second port. According to the utility model, the technical problems of many matching steps, complex product structure, small power capacity, poor product performance consistency and difficult structure sealing of a microwave combiner in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave passive devices, in particular to a microwave combiner based on a waveguide bridge. Background Art

[0002] Microwave devices are often used in microwave relay communications. Since they are used on outdoor towers for a long time, their reliability requirements are very high, and their size and weight must be as small as possible.

[0003] Microwave combiners based on waveguide bridges are one such type of device, and they are in high market demand. Waveguide microwave devices offer the advantages of low loss, high power capacity, and sufficient reliability for outdoor use. However, this requires adequate sealing, so they are often used in microwave relay communications. For microwave devices, the higher the frequency and the shorter the wavelength, the more limited the processing tolerances must be to meet the electrical performance losses caused by these tolerances. However, while meeting the required bandwidth and performance requirements, fewer internal cavity matching steps and a simpler structure reduce the processing difficulty. This also results in smaller cumulative tolerances, which in turn minimizes the impact on the product's electrical performance.

[0004] Microwave combiners often use a variety of interfaces, such as different types of coaxial interfaces or waveguide interfaces of different standards. Therefore, in order to achieve wide application, we set the input and output ports to standard waveguide ports. If the interface needs to be changed, it is only necessary to install the corresponding interface conversion device, such as coaxial waveguide conversion, or matrix conversion, circular matrix conversion, etc.

[0005] However, in the existing technology, the number of matching steps inside the cavity is usually large and its structure is relatively complex. Therefore, for mass production, the product performance consistency is poor and a lot of debugging work is required, which results in reduced product production efficiency and increased production costs. Utility Model Content

[0006] The purpose of the utility model is to provide a microwave combiner based on a waveguide bridge to alleviate the technical problems existing in the prior art of microwave combiners, such as many matching steps, complex product structure, small power capacity, poor product performance consistency and difficult structural sealing.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] In a first aspect, the utility model provides a microwave combiner based on a waveguide bridge, comprising a lower cavity and an upper cover, wherein the lower cavity and the upper cover are detachably connected;

[0009] The lower cavity is divided into a first waveguide cavity and a second waveguide cavity by a central wall, and the first waveguide cavity and the second waveguide cavity form a waveguide bridge;

[0010] The lower cavity is provided with a first port, a second port and a third port, the first port is set as an output port, and the second port and the third port are both set as input ports;

[0011] One end of the first waveguide cavity is connected to the first port, and the other end is connected to the third port;

[0012] The second waveguide cavity is connected to the second port.

[0013] Furthermore, a first matching step is provided on the cavity wall of the first waveguide cavity, and a second matching step is provided on the first matching step, and the first matching step and the second matching step are used to couple microwave signals to the second waveguide cavity.

[0014] Furthermore, a third matching step matching the first matching step is provided on the cavity wall of the second waveguide cavity, and a fourth matching step matching the second matching step is provided on the third matching step, and the third matching step and the fourth matching step are used to couple microwave signals to the first waveguide cavity.

[0015] Furthermore, the central wall includes a first barrier body and a second barrier body, one end of the first barrier body is connected to the lower cavity, and a coupling gap is provided between the other end and the second barrier body;

[0016] One end of the second barrier body away from the first barrier body is connected to the lower cavity.

[0017] Furthermore, the lower cavity is provided with a matching platform, and the matching platform is arranged at the coupling gap.

[0018] Furthermore, the first port is connected to the lower cavity through a first connector, and the first port is communicated with the first waveguide cavity through the first connector.

[0019] Furthermore, the second port is connected to the lower cavity through a second connecting piece, and the second port is communicated with the second waveguide cavity through the second connecting piece.

[0020] Furthermore, the third port is connected to the lower cavity through a third connecting piece, and the third port is communicated with the first waveguide cavity through the third connecting piece.

[0021] Furthermore, the first port, the second port and the third port are all rectangular waveguide ports.

[0022] Furthermore, the upper cover plate is provided with an annular sealing groove, an annular sealing ring is provided in the annular sealing groove, and the annular sealing ring is used to seal the connection between the upper cover plate and the lower cavity.

[0023] The utility model can achieve the following beneficial effects:

[0024] In the first aspect, the utility model provides a microwave combiner based on a waveguide electrical bridge, comprising a lower cavity and an upper cover plate, wherein the lower cavity is detachably connected to the upper cover plate; the lower cavity is divided into a first waveguide cavity and a second waveguide cavity by a central wall, and the first waveguide cavity and the second waveguide cavity form a waveguide electrical bridge; the lower cavity is provided with a first port, a second port and a third port, the first port is set as an output port, and the second port and the third port are both set as input ports; one end of the first waveguide cavity is connected to the first port, and the other end is connected to the third port; the second waveguide cavity is connected to the second port.

[0025] In the utility model, the microwave combiner based on the waveguide bridge includes a detachably connected lower cavity and an upper cover, that is, the upper cover is covered on the lower cavity, and preferably, the upper cover and the lower cavity are respectively provided with a plurality of threaded holes and fixed by screws; and in the lower cavity, a first waveguide cavity and a second waveguide cavity are separated by a central wall, and a waveguide bridge is formed by the first waveguide cavity and the second waveguide cavity; a first port and a third port are respectively provided on the left and right sides of the lower cavity, and a second port is provided on the top of the lower cavity, wherein the first port and the third port are both connected to the first waveguide cavity, and the second port is connected to the second waveguide cavity.

[0026] Compared with the prior art, the microwave combiner based on the waveguide bridge provided by the present invention forms a waveguide bridge by opening a first waveguide cavity and a second waveguide cavity that are interconnected in the lower cavity, so as to couple the microwave signal in the first waveguide cavity to the second waveguide cavity; and since the number of steps processed in the present application is small, the product structure is simplified and the consistency of product performance is improved.

[0027] In summary, the present invention at least alleviates the technical problems existing in the prior art of microwave combiners, such as multiple matching steps, complex product structure, small power capacity, poor product performance consistency, and difficulty in structural sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a microwave combiner based on a waveguide bridge provided in an embodiment of the present utility model;

[0030] Figure 2 A three-dimensional schematic diagram of the lower cavity portion of a microwave combiner based on a waveguide bridge provided in an embodiment of the present utility model;

[0031] Figure 3 A schematic top view of the lower cavity portion of a microwave combiner based on a waveguide bridge provided in an embodiment of the present utility model;

[0032] Figure 4 This is a bottom-up structural schematic diagram of the upper cover plate of a microwave combiner based on a waveguide bridge provided in an embodiment of the utility model.

[0033] Icons: 1-lower cavity; 11-first waveguide cavity; 111-first matching step; 112-second matching step; 12-second waveguide cavity; 121-third matching step; 122-fourth matching step; 13-coupling gap; 14-matching platform; 151-first partition body; 152-second partition body; 16-first port; 161-first connecting piece; 162-first sinking section; 17-second port; 171-second connecting piece; 172-second sinking section; 18-third port; 181-third connecting piece; 182-third sinking section; 2-upper cover; 21-annular sealing groove. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0039] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0040] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0041] Example 1

[0042] This embodiment provides a microwave combiner based on a waveguide bridge. Figure 1 and Figure 2 The microwave combiner based on the waveguide bridge includes a lower cavity 1 and an upper cover plate 2, and the lower cavity 1 is detachably connected to the upper cover plate 2; the lower cavity 1 is divided into a first waveguide cavity 11 and a second waveguide cavity 12 by a central wall, and the first waveguide cavity 11 and the second waveguide cavity 12 form a waveguide bridge; the lower cavity 1 is provided with a first port 16, a second port 17 and a third port 18, the first port 16 is set as an output port, and the second port 17 and the third port 18 are both set as input ports; one end of the first waveguide cavity 11 is connected to the first port 16, and the other end is connected to the third port 18; the second waveguide cavity 12 is connected to the second port 17.

[0043] The embodiments of the present utility model at least alleviate the technical problems existing in the prior art of microwave combiners, such as multiple matching steps, complex product structure, small power capacity, poor product performance consistency, and difficulty in structural sealing.

[0044] In an embodiment of the present invention, a microwave combiner based on a waveguide bridge includes a detachably connected lower cavity 1 and an upper cover plate 2, that is, the upper cover plate 2 covers the lower cavity 1, and preferably, the upper cover plate 2 and the lower cavity 1 are respectively provided with a plurality of threaded holes and fixed by screws; and in the lower cavity 1, a first waveguide cavity 11 and a second waveguide cavity 12 are separated by a central wall, and a waveguide bridge is formed by the first waveguide cavity 11 and the second waveguide cavity 12; a first port 16 and a third port 18 are respectively provided on the left and right sides of the lower cavity 1, and a second port 17 is provided on the top of the lower cavity 1, wherein the first port 16 and the third port 18 are both connected to the first waveguide cavity 11, and the second port 17 is connected to the second waveguide cavity 12.

[0045] Compared with the prior art, the microwave combiner based on the waveguide bridge provided in the embodiment of the present invention forms a waveguide bridge by opening a first waveguide cavity 11 and a second waveguide cavity 12 that are interconnected in the lower cavity 1, so as to couple the microwave signal in the first waveguide cavity 11 to the second waveguide cavity 12. In addition, since the number of steps processed in the present application is small, the product structure is simplified and the consistency of product performance is improved.

[0046] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3 A first matching step 111 is provided on the cavity wall of the first waveguide cavity 11 , and a second matching step 112 is provided on the first matching step 111 . The first matching step 111 and the second matching step 112 are used to couple microwave signals to the second waveguide cavity 12 .

[0047] Specifically: a first matching step 111 is provided on the cavity wall of the first waveguide cavity 11 away from the second waveguide cavity 12, and a second matching step 112 is provided on the first matching step 111. The first matching step 111 and the second matching step 112 are both used to transmit the coupled microwave signal to the second waveguide cavity 12 through the coupling slot 13.

[0048] Further, refer to Figure 2 or Figure 3 A third matching step 121 matching the first matching step 111 is provided on the cavity wall of the second waveguide cavity 12, and a fourth matching step 122 matching the second matching step 112 is provided on the third matching step 121. The third matching step 121 and the fourth matching step 122 are used to couple the microwave signal to the first waveguide cavity 11.

[0049] Specifically, a third matching step 121 is provided on the cavity wall of the second waveguide cavity 12 away from the first waveguide cavity 11, and a fourth matching step 122 is provided on the third matching step 121. The third matching step 121 is distributed correspondingly to the first matching step 111, and the fourth matching step 122 is distributed correspondingly to the second matching step 112.

[0050] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3 The central wall includes a first partition body 151 and a second partition body 152. One end of the first partition body 151 is connected to the lower cavity 1, and a coupling seam 13 is provided between the other end and the second partition body 152; the end of the second partition body 152 away from the first partition body 151 is connected to the lower cavity 1.

[0051] Specifically, one end of the first barrier 151 is connected to an end of the lower cavity 1 near the first port 16, while one end of the second barrier 152 is connected to an end of the lower cavity 1 near the third port 18. A coupling slot 13 is provided between the free ends of the first barrier 151 and the second barrier 152, so that the first waveguide cavity 11 and the second waveguide cavity 12 are connected through the coupling slot 13.

[0052] Further, refer to Figure 2 or Figure 3 The lower cavity 1 is provided with a matching platform 14 , and the matching platform 14 is provided at the coupling gap 13 .

[0053] Specifically, a matching platform 14 with a square structure is provided at the coupling slot 13 , and preferably, the matching platform 14 can be provided in the middle of the coupling slot 13 .

[0054] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3 The first port 16 is connected to the lower cavity 1 through the first connecting piece 161 , and the first port 16 is communicated with the first waveguide cavity 11 through the first connecting piece 161 .

[0055] Specifically: the first port 16 is connected to the lower cavity 1 through a first connecting piece 161, and preferably, the lower cavity 1 is provided with a first sinking section 162 at the connection with the first connecting piece 161, which can prevent the top side of the first port 16 from being pierced when the lower cavity 1 is opened. When the annular sealing ring is tightly attached to the upper cover plate 2 and the lower cavity 1, a gap appears at the first port 16, and a sealing ring cannot be set, resulting in poor sealing, which affects signal coupling transmission.

[0056] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3The second port 17 is connected to the lower cavity 1 through the second connecting piece 171 , and the second port 17 is communicated with the second waveguide cavity 12 through the second connecting piece 171 .

[0057] Specifically: the second port 17 is connected to the lower cavity 1 through a second connecting piece 171, and preferably, the lower cavity 1 is provided with a second sinking section 172 at the connection with the second connecting piece 171, which can prevent the top side of the second port 17 from being pierced when the lower cavity 1 is opened. When the annular sealing ring is tightly attached to the upper cover plate 2 and the lower cavity 1, a gap appears at the second port 17, and a sealing ring cannot be set, resulting in poor sealing, which affects signal coupling transmission.

[0058] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3 The third port 18 is connected to the lower cavity 1 through the third connecting piece 181 , and the third port 18 is communicated with the first waveguide cavity 11 through the third connecting piece 181 .

[0059] Specifically: the third port 18 is connected to the lower cavity 1 through a third connecting piece 181, and preferably, the lower cavity 1 is provided with a third sinking section 182 at the connection with the third connecting piece 181, which can prevent the top side of the third port 18 from being pierced when the lower cavity 1 is opened. When the annular sealing ring is tightly attached to the upper cover plate 2 and the lower cavity 1, a gap appears at the third port 18, and a sealing ring cannot be set, resulting in poor sealing, which affects signal coupling transmission.

[0060] And preferably, the first port 16, the second port 17 and the third port 18 are all provided with flanges for connecting to external structures through the flanges.

[0061] In an optional implementation manner of this embodiment, refer to Figure 2 The first port 16, the second port 17 and the third port 18 are all rectangular waveguide ports.

[0062] Specifically: the first port 16, the second port 17 and the third port 18 are all rectangular waveguide ports; preferably, the rectangular waveguide ports are provided with standard flange holes, and the flange holes can connect the corresponding ports to external devices.

[0063] In an optional implementation manner of this embodiment, refer to Figure 4 The upper cover plate 2 is provided with an annular sealing groove 21 , and an annular sealing ring is provided in the annular sealing groove 21 , and the annular sealing ring is used to seal the connection between the upper cover plate 2 and the lower cavity 1 .

[0064] Specifically: the upper cover plate 2 is provided with an annular sealing groove 21. Preferably, the shape of the annular sealing groove 21 matches the edge of the lower cavity 1, so that after the annular sealing ring is set in this annular sealing groove 21, the upper cover plate 2 and the lower cavity 1 are connected, and the joint between the two is sealed.

[0065] It should be emphasized that the operating frequency band of the microwave combiner based on the waveguide bridge can be 5.925-7.125 GHz, the combiner power splitting ratio is 3 dB, the flatness reaches ±0.15 dB, the standing wave of each port is less than 1.2, and the isolation is ≥30 dB, which meets the combiner index requirements for microwave relay communication.

[0066] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the various embodiments of the utility model.

Claims

1. A microwave combiner based on a waveguide bridge, characterized in that: It comprises a lower cavity (1) and an upper cover plate (2), wherein the lower cavity (1) and the upper cover plate (2) are detachably connected; The lower cavity (1) is divided into a first waveguide cavity (11) and a second waveguide cavity (12) by a central wall, and the first waveguide cavity (11) and the second waveguide cavity (12) form a waveguide bridge; The lower cavity (1) is provided with a first port (16), a second port (17) and a third port (18), the first port (16) being set as an output port, and the second port (17) and the third port (18) being set as input ports; One end of the first waveguide cavity (11) is connected to the first port (16), and the other end is connected to the third port (18); The second waveguide cavity (12) is connected to the second port (17).

2. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: A first matching step (111) is provided on the cavity wall of the first waveguide cavity (11), and a second matching step (112) is provided on the first matching step (111), and the first matching step (111) and the second matching step (112) are used to couple microwave signals to the second waveguide cavity (12).

3. The microwave combiner based on the waveguide bridge according to claim 2, characterized in that: A third matching step (121) matching the first matching step (111) is provided on the cavity wall of the second waveguide cavity (12), and a fourth matching step (122) matching the second matching step (112) is provided on the third matching step (121), and the third matching step (121) and the fourth matching step (122) are used to couple microwave signals to the first waveguide cavity (11).

4. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: The central wall comprises a first barrier body (151) and a second barrier body (152); one end of the first barrier body (151) is connected to the lower cavity (1), and a coupling seam (13) is provided between the other end and the second barrier body (152); One end of the second barrier body (152) away from the first barrier body (151) is connected to the lower cavity (1).

5. The microwave combiner based on the waveguide bridge according to claim 4, characterized in that: The lower cavity (1) is provided with a matching platform (14), and the matching platform (14) is arranged at the coupling gap (13).

6. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: The first port (16) is connected to the lower cavity (1) via a first connecting piece (161), and the first port (16) is communicated with the first waveguide cavity (11) via the first connecting piece (161).

7. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: The second port (17) is connected to the lower cavity (1) via a second connecting piece (171), and the second port (17) is communicated with the second waveguide cavity (12) via the second connecting piece (171).

8. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: The third port (18) is connected to the lower cavity (1) via a third connecting piece (181), and the third port (18) is communicated with the first waveguide cavity (11) via the third connecting piece (181).

9. The microwave combiner based on the waveguide bridge according to claim 1, characterized in that: The first port (16), the second port (17) and the third port (18) are all rectangular waveguide ports.

10. The microwave combiner based on the waveguide bridge according to any one of claims 1 to 9, characterized in that: The upper cover plate (2) is provided with an annular sealing groove (21), an annular sealing ring is provided in the annular sealing groove (21), and the annular sealing ring is used to seal the connection between the upper cover plate (2) and the lower cavity (1).

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