CN217035945U

CN217035945U - Ultra-wideband high-power dual directional coupler

Info

Publication number: CN217035945U
Application number: CN202220857732.2U
Authority: CN
Inventors: 胡南; 谢文青; 刘建睿; 刘爽; 赵丽新
Original assignee: Beijing Xingyinglian Microwave Technology Co ltd
Current assignee: Beijing Xingyinglian Microwave Technology Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-07-22
Anticipated expiration: 2032-04-14

Abstract

The utility model discloses an ultra-wideband high-power dual-directional coupler, and relates to the technical field of couplers. The coupler comprises an upper shell and a lower shell, wherein an upper cavity groove and a lower cavity groove are formed in two opposite surfaces of the upper shell and the lower shell respectively, the upper cavity groove and the lower cavity groove form a cavity structure, a coaxial coupling structure is arranged in the cavity structure, and a strip line coupling structure is clamped between the upper shell and the lower shell on two sides of the coaxial coupling structure respectively. The coupler has the advantages of wide frequency band range, small standing wave, small insertion loss and the like.

Description

Ultra-wideband high-power dual directional coupler

Technical Field

The utility model relates to the technical field of couplers, in particular to an ultra-wideband high-power dual-directional coupler.

Background

Directional couplers are important microwave devices and are often used in various communication/radar/satellite systems. The coupler functions to split the signal in a certain proportion. There are many different forms of couplers. Common couplers have strip line and microstrip line structures, which are difficult to apply in high power conditions. Waveguide couplers are another common coupler type, which has the advantage of simple structure and high power capacity. Waveguide couplers may be used in high power applications. The aperture coupling is a common coupling structure of a waveguide coupler, and power distribution is realized through a series of apertures between a main waveguide and an auxiliary waveguide. The coupler needs high directivity, and the design of the broadband high directivity coupler achieves remarkable results at present.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is how to provide an ultra-wideband high-power dual-directional coupler with wide frequency band range, small standing wave and small insertion loss.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: an ultra-wideband high-power dual directional coupler, characterized in that: the coaxial coupling structure comprises an upper shell and a lower shell, wherein an upper cavity groove and a lower cavity groove are respectively formed on two opposite surfaces of the upper shell and the lower shell, the upper cavity groove and the lower cavity groove form a cavity structure, a coaxial coupling structure is arranged in the cavity structure, and a strip line coupling structure is respectively clamped between the upper shell and the lower shell at two sides of the coaxial coupling structure;

the coaxial coupling structure comprises a central column assembly positioned in a cavity structure, the central column assembly comprises a central column positioned at the axis center and a medium barrel positioned at the periphery of the central column, the periphery of the medium barrel is in contact with the inner wall of the cavity structure, two ends of the central column assembly are respectively connected with a first connector, the first connectors are positioned on the outer sides of the upper shell and the lower shell and are electrically connected with the central column;

the strip line coupling structure comprises an upper layer printed board and a lower layer printed board, the upper layer printed board comprises a first medium layer, a first metal layer is formed on the upper surface of the first medium layer, the lower layer printed board comprises a second medium layer, a second metal layer is formed on the lower surface of the second medium layer, a metal foil structure in a micro-strip line form is formed on the upper surface of the second medium layer, the metal foil is in a U-shaped structure, the two ends of the U-shaped metal foil are located on the front side face and the rear side face of the directional coupler, one end of each U-shaped metal foil is connected with a second connector, the other end of each U-shaped metal foil is connected with a third connector, a coaxial load is arranged on the third connector, and the coaxial load is electrically connected with the U-shaped metal foil.

The further technical scheme is as follows: the strip line coupling structure comprises a first strip line coupling structure located on the front side of the coupler and a second strip line coupling structure located on the rear side of the coupler, wherein a second connector in the first strip line coupling structure is arranged close to a first connector on the left side, and a second connector in the second strip line coupling structure is arranged close to a first connector on the right side.

The further technical scheme is as follows: and the upper layer printed board and the lower layer printed board are provided with protruding parts extending outwards, and two free ends of the metal foil structure in the form of the microstrip line extend to the edges of the protruding parts and are used for being connected with the second connector and the third connector.

The further technical scheme is as follows: through holes are formed in the upper printed board and the lower printed board, and screws on the outer sides penetrate through the lower shell and the through holes to fix the upper printed board and the lower printed board to the upper shell.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the main line structure in the directional coupler is a coaxial coupling structure, and the auxiliary line structure is a strip line coupling structure. To increase the peak power of the coupler, the main and secondary line structures use different dielectrics and the dimension of the strip line satisfies the chebyshev inequality. The working frequency band of the directional coupler is 0.7GHz-6GHz, the simulation result of the standing wave of the main line is below 1.05, the secondary line is below 1.15, the coupling degree is 40dB, the directivity is less than-20 dB, and the insertion loss is less than 0.1 dB.

Drawings

The utility model is described in further detail below with reference to the drawings and the detailed description.

Fig. 1 is a schematic perspective view of a directional coupler according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a directional coupler according to an embodiment of the present invention;

fig. 3 is a schematic front view of a directional coupler according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a side view of a directional coupler according to an embodiment of the present invention;

fig. 5 is a schematic top view of a directional coupler according to an embodiment of the present invention;

FIG. 6 is a schematic bottom view of a directional coupler according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a directional coupler according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a directional coupler according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of a directional coupler according to an embodiment of the present invention with the upper housing and the lower housing removed;

FIG. 10 is an exploded view of a directional coupler according to an embodiment of the present invention;

fig. 11 is an exploded schematic view of an upper printed board and a lower printed board in the directional coupler according to the embodiment of the present invention;

wherein: 1. an upper housing; 2. a lower housing; 3. an upper cavity groove; 4. a lower cavity groove; 5. a central column; 6. a media cartridge; 7. a first connector; 8. a first dielectric layer; 9. a first metal layer; 10. a second dielectric layer; 11. a second metal layer; 12. a metal foil structure in the form of a microstrip line; 13. a second connector; 14. a third connector; 15. and (4) carrying out coaxial loading.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 11, an embodiment of the present invention discloses an ultra wide band high power dual directional coupler, which includes an upper housing 1 and a lower housing 2, wherein an upper cavity groove 3 and a lower cavity groove 4 are respectively formed on two opposite surfaces of the upper housing 1 and the lower housing 2, and the upper cavity groove 3 and the lower cavity groove 4 form a cavity structure. The coaxial coupling structure is characterized in that a coaxial coupling structure is arranged in the cavity structure, a strip line coupling structure is clamped between the upper shell 1 and the lower shell 2 on two sides of the coaxial coupling structure respectively, and the coaxial coupling structure can be a round coaxial coupling structure or a square coaxial coupling structure. It should be noted that, as can be seen from fig. 8, when the upper cavity groove 3 and the lower cavity groove 4 are oppositely arranged in the present application, the cavity structure is a structure having a gap on both the front side and the rear side, the gap is used for assembling the strip line coupling structure, and the assembly of the coupler can be made simpler by the above arrangement.

Further, as shown in fig. 7 to 9, the coaxial coupling structure includes a center post assembly located in the cavity structure, the center post assembly includes a center post 5 located at the axis and a medium cylinder 6 located at the periphery of the center post 5, and the center post 5 is completely wrapped by the medium cylinder 6, so that the signal transmission is more stable; the periphery of the medium cylinder 6 is in contact with the inner wall of the cavity structure (including the whole upper cavity groove 3 and the whole lower cavity groove 4), two ends of the center column assembly are respectively connected with a first connector 7, the first connectors 7 are located on the outer sides of the upper shell 1 and the lower shell 2, the first connectors 7 are electrically connected with the center column 5, and it should be noted that the connectors are provided with corresponding center column structures for being conveniently connected with the center column. The center post 5 and the first connector 7 are made of metal material.

Further, as shown in fig. 7 to 11, the strip line coupling structures between the upper housing and the lower housing on the front and rear sides of the coaxial coupling structure have the same structure, one of the strip line coupling structures includes an upper printed board and a lower printed board, the upper printed board includes a first dielectric layer 8, a first metal layer 9 is formed on the upper surface of the first dielectric layer 8, the lower printed board includes a second dielectric layer 10, a second metal layer 11 is formed on the lower surface of the second dielectric layer 10, and a metal foil structure 12 in the form of a microstrip line is formed on the upper surface of the second dielectric layer 10. The metal foil is U type structure, U type metal foil's both ends to directional coupler's leading flank or trailing flank extend, and the one end of every U type metal foil is connected with a second connector 13, and the other end of every U type metal foil is connected with third connector 14, be provided with coaxial load 15 on the third connector 14, coaxial load 15 with U type metal foil electricity is connected. Preferably, the first metal layer 9 and the second metal layer 11 are made of metal copper materials, the metal foil structure in the form of a microstrip line is also made of a copper material, and the size of the metal foil structure in the form of a microstrip line in the present application satisfies the chebyshev inequality.

It should be noted that, in the present application, the first connector 7, the second connector 13, and the third connector 14 are fixed to the upper case 1 and the lower case 2 by screws. Through holes are formed in the upper layer printed board and the lower layer printed board, and screws on the outer side penetrate through the lower shell 2 and the through holes to fix the upper layer printed board and the lower layer printed board to the upper shell 1.

The strip line coupling structure comprises a first strip line coupling structure located on the front side of the coupler and a second strip line coupling structure located on the rear side of the coupler, and although the first strip line coupling structure and the second strip line coupling structure are identical in structure, the installation modes of connectors on the first strip line coupling structure and the second strip line coupling structure are different.

Furthermore, as shown in fig. 11, the upper and lower printed boards are formed with outwardly extending protrusions, and both free ends of the metal foil structure in the form of a microstrip line extend to edges of the protrusions for connection with the second and

third connectors

13 and 14.

In summary, in the directional coupler described in the present application, the main line structure is a coaxial coupling structure, and the secondary line structure is a strip line coupling structure. To increase the peak power of the coupler, the main and secondary line structures use different dielectrics and the dimension of the strip line satisfies the chebyshev inequality. The working frequency band of the directional coupler is 0.7GHz-6GHz, the simulation result of the standing wave of the main line is below 1.05, the secondary line is below 1.15, the coupling degree is 40dB, the directivity is less than-20 dB, and the insertion loss is less than 0.1 dB.

Claims

1. An ultra-wideband high-power dual directional coupler, characterized in that: the coaxial coupling structure comprises an upper shell (1) and a lower shell (2), wherein an upper cavity groove (3) and a lower cavity groove (4) are formed in two opposite surfaces of the upper shell (1) and the lower shell (2) respectively, the upper cavity groove (3) and the lower cavity groove (4) form a cavity structure, a coaxial coupling structure is arranged in the cavity structure, and a strip line coupling structure is clamped between the upper shell (1) and the lower shell (2) at two sides of the coaxial coupling structure respectively;

the coaxial coupling structure comprises a central column assembly positioned in a cavity structure, the central column assembly comprises a central column (5) positioned at the axis center and a medium barrel (6) positioned at the periphery of the central column (5), the periphery of the medium barrel (6) is in contact with the inner wall of the cavity structure, two ends of the central column assembly are respectively connected with a first connector (7), the first connectors (7) are positioned at the outer sides of the upper shell (1) and the lower shell (2), and the first connectors (7) are electrically connected with the central column (5);

the strip line coupling structure comprises an upper layer printed board and a lower layer printed board, the upper layer printed board comprises a first medium layer (8), a first metal layer (9) is formed on the upper surface of the first dielectric layer (8), the lower printed board comprises a second dielectric layer (10), a second metal layer (11) is formed on the lower surface of the second dielectric layer (10), a metal foil structure (12) in the form of a microstrip line is formed on the upper surface of the second dielectric layer (10), the metal foils are U-shaped structures, two ends of each U-shaped metal foil extend to the front side or the rear side of the directional coupler, one end of each U-shaped metal foil is connected with a second connector (13), the other end of each U-shaped metal foil is connected with a third connector (14), a coaxial load (15) is arranged on the third connector (14), and the coaxial load (15) is electrically connected with the U-shaped metal foil.

2. The ultra-wideband high-power bi-directional coupler of claim 1, wherein: the first connector (7), the second connector (13), and the third connector (14) are fixed to the upper case (1) and the lower case (2) by screws.

3. The ultra-wideband high-power dual directional coupler of claim 1, wherein: the strip line coupling structure comprises a first strip line coupling structure located on the front side of the coupler and a second strip line coupling structure located on the rear side of the coupler, wherein a second connector (13) in the first strip line coupling structure is arranged close to a first connector (7) on the left side, and a second connector (13) in the second strip line coupling structure is arranged close to a first connector (7) on the right side.

4. The ultra-wideband high-power bi-directional coupler of claim 1, wherein: the first metal layer (9) and the second metal layer (11) are copper foil layers.

5. The ultra-wideband high-power dual directional coupler of claim 1, wherein: the metal foil structure in the form of the microstrip line is made of copper.

6. The ultra-wideband high-power dual directional coupler of claim 1, wherein: the dimensions of the metal foil structure in the form of microstrip lines satisfy the chebyshev inequality.

7. The ultra-wideband high-power bi-directional coupler of claim 1, wherein: and the upper layer printed board and the lower layer printed board are provided with outwards extending protruding parts, and two free ends of the metal foil structure in the form of the microstrip line extend to the edges of the protruding parts and are used for being connected with the second connector (13) and the third connector (14).

8. The ultra-wideband high-power bi-directional coupler of claim 1, wherein: through holes are formed in the upper layer printed board and the lower layer printed board, and screws passing through the outer sides penetrate through the lower shell (2) and the through holes to fix the upper layer printed board and the lower layer printed board to the upper shell (1).