CN115051133B - Waveguide broadside broadband coupling bridge - Google Patents
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- CN115051133B CN115051133B CN202210848290.XA CN202210848290A CN115051133B CN 115051133 B CN115051133 B CN 115051133B CN 202210848290 A CN202210848290 A CN 202210848290A CN 115051133 B CN115051133 B CN 115051133B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The application discloses a waveguide broadside broadband coupling bridge, and relates to the technical field of coupling bridges. The bridge comprises an upper shell, a middle plate and a lower shell, a first waveguide coupling cavity is formed between the upper shell and the middle plate, two ports of the first waveguide coupling cavity are located on the long side face of the same side of the rectangular broadside coupling bridge, a second waveguide coupling cavity is formed between the middle plate and the lower shell, two ports of the second waveguide coupling cavity are located on the long side face of the other side of the rectangular broadside coupling bridge, the middle parts of the first waveguide coupling cavity and the second waveguide coupling cavity are overlapped in the upper projection direction and the lower projection direction, the overlapped parts are arranged along the broadsides of the coupling bridge, and the first waveguide coupling cavity and the second waveguide coupling cavity are in coupling communication through a coupling hole located on the middle plate. The bridge has the advantages of simple structure, wide working bandwidth and the like.
Description
Technical Field
The application relates to the technical field of coupling bridges, in particular to a waveguide broadside broadband coupling bridge.
Background
The waveguide 3dB bridge is a widely used microwave element in radar feeders, satellite ground station feeders, and microwave test equipment. A distinction can be made between narrow-side coupling and wide-side coupling. The narrow-side coupling type can be classified into a capacitive matching type and an inductive matching type. Broadside coupling can be categorized into no-inner conductor type and inner conductor type. For radar and communication systems, an increase in system output power means that the system has a larger radius of action and a stronger interference rejection. But the output power generated in the millimeter wave band is limited by the device fabrication process, impedance matching, and device heat dissipation.
Disclosure of Invention
The application aims to solve the technical problem of providing a waveguide broadside broadband coupling bridge which has a simple structure and can widen the working bandwidth.
In order to solve the technical problems, the application adopts the following technical scheme: a waveguide broadside broadband coupling bridge, characterized by: the whole structure of broadside coupling bridge is the cuboid, including the last casing of cuboid structure, the intermediate lamella of cuboid structure and the lower casing of cuboid structure, go up casing, intermediate lamella and lower casing from the top down in proper order and fix together, be formed with first waveguide coupling cavity between last casing and the intermediate lamella, just two ports of first waveguide coupling cavity are located the long limit side of the broadside coupling bridge of rectangle on the same side, be formed with the second waveguide coupling cavity between intermediate lamella and the lower casing, just two ports of second waveguide coupling cavity are located the long limit side of the opposite side of the broadside coupling bridge of rectangle, the intermediate part of first waveguide coupling cavity and second waveguide coupling cavity has the overlap in the upper and lower projection direction, and this overlap portion is followed the broadside setting of coupling bridge, carry out the coupling intercommunication through the coupling hole that is located the intermediate lamella between first waveguide coupling cavity and the second waveguide coupling cavity.
The further technical proposal is that: an upper first coupling groove is formed in the lower surface of the upper shell, a lower first coupling groove is formed in the upper surface of the middle plate corresponding to the upper first coupling groove, and the upper first coupling groove and the lower first coupling groove are oppositely arranged to form the first waveguide coupling cavity.
The further technical proposal is that: the upper first coupling groove and the lower first coupling groove are U-shaped in overall structure, the two structures are similar, openings at two ends of the upper first coupling groove are located on the front side surface of the upper shell, openings at two ends of the lower first coupling groove are located on the front side surface of the middle plate, the upper first coupling groove comprises a first connecting section, a second connecting section and a third connecting section, the first connecting section and the third connecting section are arranged along the short side direction of the upper shell, the second connecting section is arranged along the long side direction of the upper shell, the widths of the first connecting section and the third connecting section are gradually reduced and then kept unchanged after being kept unchanged, the widths of the second connecting section are unchanged, and the first connecting section and the second connecting section and the third connecting section are connected through a rounding mode.
The further technical proposal is that: an upper second coupling groove is formed in the lower surface of the middle plate, a lower second coupling groove is formed in the upper surface of the lower shell corresponding to the upper second coupling groove, the upper second coupling groove and the lower second coupling groove are oppositely arranged to form the second waveguide coupling cavity, and the coupling hole is located in the middle of the lower first coupling groove and enables the lower first coupling groove to be communicated with the upper second coupling groove through the coupling hole.
The further technical proposal is that: the upper second coupling groove and the lower second coupling groove are U-shaped in overall structure, the two structures are similar, openings at two ends of the upper second coupling groove are located on the rear side face of the middle plate, openings at two ends of the lower second coupling groove are located on the rear side face of the lower shell, the lower second coupling groove comprises a fourth connecting section, a fifth connecting section and a sixth connecting section, the fourth connecting section and the sixth connecting section are arranged along the short side direction of the lower shell, the second connecting section is arranged along the long side direction of the lower shell, the widths of the fourth connecting section and the sixth connecting section are gradually reduced after being unchanged, the widths of the fourth connecting section are unchanged, and the fourth connecting section and the fifth connecting section are connected in a rounded corner mode.
The further technical proposal is that: the parts of the first waveguide coupling cavity and the second waveguide coupling cavity extending inwards from the openings at the two ends are treated in a mode of narrowing the inner diameters, so that the cavities at the two side ends are gradually reduced from outside to inside.
The application also discloses a waveguide broadside broadband coupling bridge, which is characterized in that: the whole structure of the broadside coupling bridge is cuboid, and comprises an upper shell of the cuboid structure, a middle plate of the cuboid structure and a lower shell of the cuboid structure, wherein the upper shell, the middle plate and the lower shell are sequentially fixed together from top to bottom, a first waveguide coupling cavity is formed between the upper shell and the middle plate, two ports of the first waveguide coupling cavity are respectively positioned on the short side surfaces of two sides of the rectangular broadside coupling bridge, a second waveguide coupling cavity is formed between the middle plate and the lower shell, and two ports of the second waveguide coupling cavity are respectively positioned on the short side surfaces of two sides of the rectangular broadside coupling bridge; the middle parts of the first waveguide coupling cavity and the second waveguide coupling cavity are overlapped in the vertical projection direction, the overlapped parts are arranged along the broadsides of the coupling bridges, and the first waveguide coupling cavity and the second waveguide coupling cavity are coupled and communicated through a coupling hole positioned on the middle plate.
The application also discloses a waveguide broadside broadband coupling bridge, which is characterized in that: the whole structure of the broadside coupling bridge is cuboid, and comprises an upper shell of the cuboid structure, a middle plate of the cuboid structure and a lower shell of the cuboid structure, wherein the upper shell, the middle plate and the lower shell are sequentially fixed together from top to bottom, a first waveguide coupling cavity is formed between the upper shell and the middle plate, one of two ports of the first waveguide coupling cavity is positioned on one short side surface of the broadside coupling bridge of the rectangle, the other port is positioned on one long side surface of the broadside coupling bridge of the rectangle, a second waveguide coupling cavity is formed between the middle plate and the lower shell, one of two ports of the second waveguide coupling cavity is positioned on one short side surface of the broadside coupling bridge of the rectangle, and the other port is positioned on one long side surface of the broadside coupling bridge of the rectangle; the middle parts of the first waveguide coupling cavity and the second waveguide coupling cavity are overlapped in the vertical projection direction, the overlapped parts are arranged along the broadsides of the coupling bridges, and the first waveguide coupling cavity and the second waveguide coupling cavity are coupled and communicated through a coupling hole positioned on the middle plate.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the bridge structure adopts broadside (broadside refers to the length of a rectangular bridge) coupling, and the waveguide cavity is transited from the standard waveguide size to the small waveguide size (the inner diameter of the cavity is gradually reduced), so that the working bandwidth can be widened, and the bandwidth of the bridge greatly exceeds that of the traditional bridge. By controlling the size, the number and the arrangement mode of the coupling holes, indexes such as the coupling degree, the directivity, the phase and the amplitude flatness can be in a good state. In addition, the width of the coupling bridge is reduced by overlapping the wide edge parts in the two coupling waveguide cavities, so that the size of the coupling bridge can be reduced.
Drawings
The application will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a first waveguide coupling cavity and a second waveguide coupling cavity inside a coupling bridge according to an embodiment of the present application;
FIG. 2 is a schematic perspective view of a first waveguide coupling cavity and a second waveguide coupling cavity inside the coupling bridge according to an embodiment of the present application;
FIG. 3 is a schematic perspective view of a coupling bridge according to an embodiment of the present application;
FIG. 4 is a schematic perspective view of a coupling bridge according to an embodiment of the present application;
FIG. 5 is a schematic perspective view of a coupling bridge according to an embodiment of the present application;
FIG. 6 is a schematic perspective view of a coupling bridge according to an embodiment of the present application;
FIG. 7 is a schematic side view of a coupling bridge according to an embodiment of the present application;
FIG. 8 is a schematic view of a middle plate of the coupling bridge according to the embodiment of the present application;
FIG. 9 is a schematic view of the structure of the upper housing (lower housing) in the coupling bridge according to the embodiment of the present application;
FIG. 10 is a schematic diagram of an exploded structure of a coupling bridge according to an embodiment of the present application;
FIG. 11 is a schematic structural diagram of a first waveguide coupling cavity and a second waveguide coupling cavity inside a coupling bridge according to a second embodiment of the present application;
FIG. 12 is a schematic structural diagram of a first waveguide coupling cavity and a second waveguide coupling cavity inside a coupling bridge according to a third embodiment of the present application;
FIG. 13 is a schematic structural diagram of a first waveguide coupling cavity and a second waveguide coupling cavity inside a coupling bridge according to a fourth embodiment of the present application;
wherein: 1. an upper housing; 2. an intermediate plate; 3. a lower housing; 4. a first waveguide coupling cavity; 5. a second waveguide coupling cavity; 6. a coupling hole; 7. an upper first coupling groove; 7-1, a first connection section; 7-2, a second connecting section; 7-3, a third connecting section; 8. a lower first coupling groove; 9. a second coupling groove is formed; 10. a lower second coupling groove; 10-1, a fourth connecting section; 10-2, a fifth connecting section; 10-3, a sixth connecting section.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Example 1
As shown in fig. 1 to 10, the embodiment of the application discloses a waveguide broadside broadband coupling bridge, which can be a waveguide 3dB bridge, wherein the whole structure of the broadside coupling bridge is a cuboid, and comprises an upper shell 1 with a cuboid structure, a middle plate 2 with a cuboid structure and a lower shell 3 with a cuboid structure, and the upper shell 1, the middle plate 2 and the lower shell 3 are all made of metal materials. The upper shell 1, the middle plate 2 and the lower shell 3 are fixed together through mutually matched screws, screw holes and the like from top to bottom in sequence. A first waveguide coupling cavity is formed between the upper shell 1 and the middle plate 2, two ports of the first waveguide coupling cavity 4 are located on the long side face of the same side of the rectangular broadside coupling bridge, a second waveguide coupling cavity 5 is formed between the middle plate 2 and the lower shell 3, two ports of the second waveguide coupling cavity 5 are located on the long side face of the other side of the rectangular broadside coupling bridge, preferably, ports on the outer sides of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are standard WR28 interfaces, of course, ports on the outer sides of the waveguide coupling cavities can be interfaces of other sizes, and related selections can be made by a person skilled in the art according to use requirements. In order to enable the two waveguide cavities to have corresponding coupling effect, the middle parts of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are overlapped in the vertical projection direction, the overlapped parts are arranged along the wide edge of the coupling bridge, and the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are in coupling communication through a coupling hole 6 positioned on the middle plate 2.
Further, as shown in fig. 9 and 10, an upper first coupling groove 7 is formed on the lower surface of the upper housing 1, a lower first coupling groove 8 is formed on the upper surface of the intermediate plate 2 corresponding to the upper first coupling groove 7, and the upper first coupling groove 7 and the lower first coupling groove 8 are disposed opposite to each other to form the first waveguide coupling cavity 4. It should be noted that, in the present application, the structures of the upper case 1 and the lower case 3 are the same, and different names are used for convenience of description.
Further, as shown in fig. 8-10, the overall structure of the upper first coupling groove 7 and the lower first coupling groove 8 is U-shaped, and the two structures are similar, the openings at both ends of the upper first coupling groove 7 are located on the front side surface of the upper housing 1, and the openings at both ends of the lower first coupling groove 8 are located on the front side surface of the middle plate 2. The upper first coupling groove 7 comprises a first connecting section 7-1, a second connecting section 7-2 and a third connecting section 7-3, wherein the first connecting section 7-1 and the third connecting section 7-3 are arranged along the short side direction of the upper shell 2, the second connecting section 7-2 is arranged along the long side direction of the upper shell 2, the widths of the first connecting section 7-1 and the third connecting section 7-3 from outside to inside are firstly kept unchanged, then gradually reduced, and finally kept unchanged; the width of the second connecting section 7-2 is unchanged, and the first connecting section 7-1 and the second connecting section 7-2 and the third connecting section 7-3 are connected in a rounding mode.
Different from the traditional narrow-side coupling mode, the wide-side coupling mode is adopted, and the waveguide cavity is transited from the standard waveguide size to the small waveguide size, so that the working bandwidth can be widened, and the bandwidth of the traditional bridge is greatly exceeded. The bridge structure is coupled in a broadside mode, the output port needs to use the standard WR28 size, but the working frequency band is higher, so that the rectangular waveguide size is reduced at the coupling hole structure part to match the working bandwidth.
Further, as shown in fig. 7 to 9, of the three sides of the first connection section 7-1 and the third connection section 7-3, the side located at the outer side is kept vertical, while the other two sides are partially inclined, so that the outer side port of the waveguide cavity is in a necking form.
Further, as shown in fig. 8 and 10, an upper second coupling groove 9 is formed on the lower surface of the middle plate 2, a lower second coupling groove 10 is formed on the upper surface of the lower housing 3 corresponding to the upper second coupling groove 9, the upper second coupling groove 9 and the lower second coupling groove 10 are disposed opposite to each other to form the second waveguide coupling cavity 5, the coupling hole 6 is located in the middle of the lower first coupling groove 8, and the lower first coupling groove 7 is communicated with the upper second coupling groove 9 through the coupling hole 6.
Since miniaturization is required in design, in order to reduce the longitudinal dimension and ensure that a sufficient electromagnetic field is coupled into the sub-line waveguide, the coupling hole area is required to be large enough, the structure is simple and easy to process, and the rectangular coupling hole is closest to the requirements in various types of coupling holes. When the coupling hole is selected, the coupling hole is ensured to have a large enough area to enable enough electromagnetic waves to be coupled into the auxiliary line waveguide, and the longitudinal size, the isolation index and the enough working bandwidth are ensured. According to the principle of small hole coupling, the more the number of the coupling holes is, the better the isolation and the working bandwidth performance are, and the double-row 6-hole coupling hole form is selected after comprehensive consideration. In the case where the coupling hole size and the number are limited, reducing the coupling hole thickness and the b-side dimension of the waveguide can effectively increase the energy coupled into the sub-line waveguide. Further, the coupling holes 6 are arranged in an array in the middle of the lower first coupling groove 8.
The indexes such as the coupling degree, the isolation degree, the amplitude/phase balance and the like of the waveguide bridge are important to pay attention to. The influence degree of each parameter in the corresponding structure on different indexes is also different. The hole thickness mainly affects the coupling degree, the hole spacing and the excessive length of the port mainly affect the amplitude balance and the phase balance.
Further, as shown in fig. 10, the overall structure of the upper second coupling groove 9 and the lower second coupling groove 10 is U-shaped, and the two structures are similar, the two end openings of the upper second coupling groove 9 are located on the rear side surface of the middle plate 2, and the two end openings of the lower second coupling groove 10 are located on the rear side surface of the lower housing 3. The lower second coupling groove 10 comprises a fourth connecting section 10-1, a fifth connecting section 10-2 and a sixth connecting section 10-3, wherein the fourth connecting section 10-1 and the sixth connecting section 10-3 are arranged along the short side direction of the lower shell 3, the second connecting section 10-2 is arranged along the long side direction of the lower shell 3, and the widths of the fourth connecting section 10-1 and the sixth connecting section 10-3 from outside to inside are firstly kept unchanged, then gradually reduced and finally kept unchanged; the width of the fourth connecting section 10-1 is unchanged, and the fourth connecting section 10-1 and the fifth connecting section 10-2 and the sixth connecting section 10-3 are connected in a rounded form.
According to the application, through the arrangement of the structure, the parts, extending inwards from the openings at the two ends, of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are treated in a mode of narrowing the inner diameters, so that the cavities at the two end parts are gradually reduced from outside to inside.
In summary, the bridge structure of the application adopts broadside (broadside refers to the length of the rectangular bridge) coupling, and the waveguide cavity is transited from the standard waveguide size to the small waveguide size (the inner diameter of the cavity is gradually reduced), so that the working bandwidth can be widened, and the bandwidth of the bridge greatly exceeds that of the traditional bridge.
Example two
As shown in fig. 11, the embodiment of the application further discloses a waveguide broadside broadband coupling bridge, the whole structure of the broadside coupling bridge is cuboid, and the waveguide broadside broadband coupling bridge comprises an upper shell 1 with a cuboid structure, a middle plate 2 with a cuboid structure and a lower shell 3 with a cuboid structure, wherein the upper shell 1, the middle plate 2 and the lower shell 3 are fixed together from top to bottom in sequence, and a first waveguide coupling cavity is formed between the upper shell 1 and the middle plate 2. Two ports of the first waveguide coupling cavity 4 are respectively positioned on the short side surfaces of two sides of the rectangular broadside coupling bridge, a second waveguide coupling cavity 5 is formed between the middle plate 2 and the lower shell 3, two ports of the second waveguide coupling cavity 5 are respectively positioned on the short side surfaces of two sides of the rectangular broadside coupling bridge, two ports on the first waveguide coupling cavity 4 are arranged upwards, and two ports on the second waveguide coupling cavity 5 are arranged downwards; the middle parts of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are overlapped in the vertical projection direction, the overlapped parts are arranged along the broadsides of the coupling bridges, and the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are in coupling communication through a coupling hole 6 positioned on the middle plate 2. It should be noted that, the present embodiment mainly differs from the first embodiment mainly in that: the positions of the ports on the first waveguide coupling cavity 4 and the positions of the ports on the second waveguide coupling cavity 5 are different, and other structures are similar to those of the embodiment, and will not be described herein.
Example III
As shown in fig. 12, the embodiment of the application discloses a waveguide broadside broadband coupling bridge, the whole structure of the broadside coupling bridge is cuboid, and the waveguide broadside broadband coupling bridge comprises an upper shell 1 with a cuboid structure, a middle plate 2 with a cuboid structure and a lower shell 3 with a cuboid structure, wherein the upper shell 1, the middle plate 2 and the lower shell 3 are fixed together from top to bottom in sequence. A first waveguide coupling cavity is formed between the upper shell 1 and the middle plate 2, one of two ports of the first waveguide coupling cavity 4 is positioned on the left side surface of the rectangular broadside coupling bridge, the other port is positioned on the long side surface of the front side of the rectangular broadside coupling bridge, a second waveguide coupling cavity 5 is formed between the middle plate 2 and the lower shell 3, one of two ports of the second waveguide coupling cavity 5 is positioned on the left side surface of the rectangular broadside coupling bridge, and the other port is positioned on the long side surface of the rear side of the rectangular broadside coupling bridge; the middle parts of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are overlapped in the vertical projection direction, the overlapped parts are arranged along the broadsides of the coupling bridges, and the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are in coupling communication through a coupling hole 6 positioned on the middle plate 2. It should be noted that, the present embodiment mainly differs from the first embodiment mainly in that: the positions of the ports on the first waveguide coupling cavity 4 and the positions of the ports on the second waveguide coupling cavity 5 are different, and other structures are similar to those of the embodiment, and will not be described herein.
Example IV
As shown in fig. 13, the embodiment of the application discloses a waveguide broadside broadband coupling bridge, the whole structure of the broadside coupling bridge is cuboid, and the waveguide broadside broadband coupling bridge comprises an upper shell 1 with a cuboid structure, a middle plate 2 with a cuboid structure and a lower shell 3 with a cuboid structure, wherein the upper shell 1, the middle plate 2 and the lower shell 3 are fixed together from top to bottom in sequence. A first waveguide coupling cavity is formed between the upper shell 1 and the middle plate 2, one of two ports of the first waveguide coupling cavity 4 is positioned on the short side surface of the left side of the rectangular broadside coupling bridge, the other port is positioned on the long side surface of the front side of the rectangular broadside coupling bridge, a second waveguide coupling cavity 5 is formed between the middle plate 2 and the lower shell 3, one of two ports of the second waveguide coupling cavity 5 is positioned on the short side surface of the right side of the rectangular broadside coupling bridge, and the other port is positioned on the long side surface of the front side of the rectangular broadside coupling bridge; the middle parts of the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are overlapped in the vertical projection direction, the overlapped parts are arranged along the broadsides of the coupling bridges, and the first waveguide coupling cavity 4 and the second waveguide coupling cavity 5 are in coupling communication through a coupling hole 6 positioned on the middle plate 2. It should be noted that, the present embodiment mainly differs from the first embodiment mainly in that: the positions of the ports on the first waveguide coupling cavity 4 and the positions of the ports on the second waveguide coupling cavity 5 are different, and other structures are similar to those of the embodiment, and will not be described herein.
Claims (2)
1. A waveguide broadside broadband coupling bridge, characterized by: the whole structure of the broadside broadband coupling bridge is cuboid, and comprises an upper shell (1) with a cuboid structure, a middle plate (2) with a cuboid structure and a lower shell (3) with a cuboid structure, wherein the upper shell (1), the middle plate (2) and the lower shell (3) are fixed together from top to bottom in sequence, a first waveguide coupling cavity is formed between the upper shell (1) and the middle plate (2), two ports of the first waveguide coupling cavity (4) are positioned on the long side face of the same side of the rectangular broadside coupling bridge, a second waveguide coupling cavity (5) is formed between the middle plate (2) and the lower shell (3), and two ports of the second waveguide coupling cavity (5) are positioned on the long side face of the other side of the rectangular broadside coupling bridge; the middle parts of the first waveguide coupling cavity (4) and the second waveguide coupling cavity (5) are overlapped in the vertical projection direction, the overlapped parts are arranged along the wide edge of the coupling bridge, and the first waveguide coupling cavity (4) and the second waveguide coupling cavity (5) are in coupling communication through a coupling hole (6) positioned on the middle plate (2);
an upper first coupling groove (7) is formed in the lower surface of the upper shell (1), a lower first coupling groove (8) is formed in the upper surface of the middle plate (2) corresponding to the upper first coupling groove (7), and the upper first coupling groove (7) and the lower first coupling groove (8) are oppositely arranged to form the first waveguide coupling cavity (4);
an upper second coupling groove (9) is formed on the lower surface of the middle plate (2), a lower second coupling groove (10) is formed on the upper surface of the lower shell (3) corresponding to the upper second coupling groove (9), the upper second coupling groove (9) and the lower second coupling groove (10) are oppositely arranged to form the second waveguide coupling cavity (5), the coupling hole (6) is positioned in the middle of the lower first coupling groove (8), and the lower first coupling groove (8) is communicated with the upper second coupling groove (9) through the coupling hole (6);
the upper first coupling groove (7) and the lower first coupling groove (8) are U-shaped in overall structure, and are similar in structure, two end openings of the upper first coupling groove (7) are arranged on the front side surface of the upper shell (1), two end openings of the lower first coupling groove (8) are arranged on the front side surface of the middle plate (2), the upper first coupling groove (7) comprises a first connecting section (7-1), a second connecting section (7-2) and a third connecting section (7-3), the first connecting section (7-1) and the third connecting section (7-3) are arranged along the short side direction of the upper shell (1), the second connecting section (7-2) is arranged along the long side direction of the upper shell (1), and the widths of the first connecting section (7-1) and the third connecting section (7-3) from outside to inside are firstly kept unchanged, then gradually reduced, and finally kept unchanged; the width of the second connecting section (7-2) is unchanged, and the first connecting section (7-1) and the second connecting section (7-2) and the third connecting section (7-3) are connected in a rounding mode;
the whole structure of the upper second coupling groove (9) and the lower second coupling groove (10) is U-shaped, and the two structures are similar, two end openings of the upper second coupling groove (9) are positioned on the rear side surface of the middle plate (2), two end openings of the lower second coupling groove (10) are positioned on the rear side surface of the lower shell (3), the lower second coupling groove (10) comprises a fourth connecting section (10-1), a fifth connecting section (10-2) and a sixth connecting section (10-3), the fourth connecting section (10-1) and the sixth connecting section (10-3) are arranged along the short side direction of the lower shell (3), the fifth connecting section (10-2) is arranged along the long side direction of the lower shell (3), and the widths of the fourth connecting section (10-1) and the sixth connecting section (10-3) from outside to inside are firstly kept unchanged, then gradually reduced, and finally kept unchanged; the width of the fourth connecting section (10-1) is unchanged, and the fourth connecting section (10-1) and the fifth connecting section (10-2) and the sixth connecting section (10-3) are connected in a rounding mode; the coupling holes (6) are rectangular holes and are arranged in the middle of the lower first coupling groove (8) in an array mode; two ports on the outer side of the first waveguide coupling cavity (4) and two ports on the outer side of the second waveguide coupling cavity (5) are standard waveguide interfaces; the parts of the first waveguide coupling cavity (4) and the second waveguide coupling cavity (5) extending inwards from the openings at the two ends are treated in a mode of narrowing the inner diameters, so that the cavities at the two side ends are gradually reduced from outside to inside.
2. The waveguide broadside broadband coupling bridge of claim 1, wherein: the coupling holes (6) are provided with two rows and three columns; the upper shell (1), the middle plate (2) and the lower shell (3) are fixed together through screws.
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| CN115051133A (en) | 2022-09-13 |
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