CN211404701U

CN211404701U - Waveguide circulator

Info

Publication number: CN211404701U
Application number: CN202020406738.9U
Authority: CN
Inventors: 程锦
Original assignee: Nanjing Guangshun Electronic Technology Research Institute Co ltd
Current assignee: Nanjing Guangshun Electronic Technology Research Institute Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-09-01
Anticipated expiration: 2030-03-26

Abstract

The utility model relates to a waveguide circulator, including waveguide cavity, ferrite, the waveguide cavity includes cavity, well cavity and lower cavity, well cavity is located go up between cavity and the lower cavity, upward be equipped with the second port on the cavity, be equipped with first port and the third port that is parallel to each other on the cavity down, the central point of well cavity is equipped with the T die cavity that link up. The utility model discloses an adopt the components of a whole that can function independently design with the waveguide cavity, divide into the three-layer with it, make first port and third port be located same side, the second port makes on another face send-receive signal and meets no longer with the one side of antenna, conveniently connects, need not the switching, and whole size is little, dismantles simple to operate, and device insertion loss is little.

Description

Waveguide circulator

Technical Field

The utility model relates to a circulator technical field, concretely relates to waveguide circulator.

Background

The circulator is a three-port device which enables electromagnetic waves to be transmitted in a unidirectional ring mode, and is formed by combining a cavity, ferrite and a permanent magnet in a physical structure, so that single transmission of specified frequency is achieved. In the modern radar and microwave multi-path communication system, a device with a unidirectional ring characteristic is used. With the continuous development of microwave technology, the index requirements for waveguide circulators are higher and higher, and the existing circulator structure is inconvenient to mount and dismount and affects the use.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a waveguide circulator.

In order to achieve the above object, the utility model adopts the following technical scheme:

a waveguide circulator comprises a waveguide cavity and a ferrite, wherein the waveguide cavity comprises an upper cavity, a middle cavity and a lower cavity, the middle cavity is located between the upper cavity and the lower cavity, a second port is arranged on the upper cavity, a first port and a third port which are parallel to each other are arranged on the lower cavity, a through T-shaped cavity is arranged at the center of the middle cavity, a T-shaped structure formed by the first port, the second port and the third port is correspondingly matched with the T-shaped cavity, a pair of supporting blocks are arranged in the T-shaped cavity, the ferrite is placed between the supporting blocks, the ferrite is located at the center of the T-shaped cavity, and the ferrite is fixed through the compression of the upper cavity and the lower cavity.

Preferably, an upper matching step is fixed at a position corresponding to the second port in the T-shaped cavity, and the second port is turned out through the upper matching step.

In any of the above schemes, preferably, lower matching steps are respectively fixed at positions corresponding to the first port and the third port in the T-shaped cavity, and the first port and the third port are turned out through the corresponding lower matching steps.

In any of the above schemes, preferably, the top of the upper cavity is provided with an upper magnetic field cavity, and a permanent magnet is encapsulated in the upper magnetic field cavity.

In any of the above schemes, preferably, the top of the lower cavity is provided with a lower magnetic field cavity, and a lower permanent magnet is encapsulated in the lower magnetic field cavity.

In any of the above schemes, preferably, the positions of the upper magnetic field cavity and the lower magnetic field cavity correspond to each other, and neither of the upper magnetic field cavity and the lower magnetic field cavity penetrates through the corresponding upper cavity and the corresponding lower cavity.

In any of the above aspects, preferably, the upper chamber, the middle chamber and the lower chamber are fixed by screws.

In any of the above solutions, it is preferable that the center lines of the upper magnetic field cavity, the lower magnetic field cavity and the ferrite are on the same straight line.

In any of the above schemes, preferably, the supporting block is made of polytetrafluoroethylene.

In any of the above aspects, preferably, the ferrite has a cylindrical structure.

Compared with the prior art, the utility model provides a pair of waveguide circulator has following beneficial effect:

1. the waveguide cavity is divided into three layers by adopting a split design, so that the first port and the third port are positioned on the same surface, and the second port is positioned on the other surface, so that the transmitting and receiving signals and the receiving antenna are not positioned on the same surface any more, the connection is convenient, the switching is not needed, the integral size is small, the disassembly and the assembly are convenient, and the insertion loss of a device is small;

2. supporting blocks made of polytetrafluoroethylene materials are arranged on the lower end face of the upper cavity and the upper end face of the lower cavity and used for fixing the ferrite, so that the supporting blocks can support the ferrite, and the frequency bandwidth of a product can be effectively expanded while the magnetizing field intensity of the ferrite sheet is ensured when the ferrite is magnetized under the action of the magnetic fields of the upper permanent magnet and the lower permanent magnet;

3. do the utility model discloses a curie temperature that makes the device is high, and temperature stability is good, is cylindrical structure with the ferrite design for the device has high frequency, wide band, low-loss characteristics.

Drawings

Fig. 1 is an exploded view of the overall structure of a waveguide circulator provided by the present invention;

fig. 2 is a schematic structural view of the embodiment shown in fig. 1 after installation.

The figures are labeled as follows: 1. an upper cover plate; 2. an upper permanent magnet; 3. an upper cavity; 4. a middle cavity; 5. a support block; 6. a ferrite; 7. a lower cavity; 8. a lower permanent magnet; 9. a lower cover plate; 10. a second port; 11. a first port; 12. a third port; 13. an upper matching step; 14. and (5) descending a matching step.

Detailed Description

In order to further understand the inventive content of the present invention, the present invention will be explained in detail with reference to the specific embodiments.

As shown in fig. 1-2, an embodiment of a waveguide circulator according to the present invention includes a waveguide cavity, a ferrite 6, the waveguide cavity comprises an upper cavity 3, a middle cavity 4 and a lower cavity 7, the middle cavity 4 is positioned between the upper cavity 3 and the lower cavity 7, a second port 10 is arranged on the upper cavity 3, a first port 11 and a third port 12 which are parallel to each other are arranged on the lower cavity 7, a through T-shaped cavity is arranged at the central part of the middle cavity 4, the first port 11, the second port 10 and the third port 12 form a T-shaped structure and are correspondingly matched with the T-shaped cavity, a pair of supporting blocks 5 are arranged in the T-shaped cavity, a ferrite 6 is arranged between the supporting blocks 5, the ferrite 6 is located in the center of the T-shaped cavity, and the ferrite 6 is fixed through the compression of the upper cavity 3 and the lower cavity 7. When the ferrite 6 is fixed, the upper cavity 3 and the lower cavity 7 are pressed against the corresponding supporting blocks 5, and the ferrite 6 is located between the supporting blocks 5, so that the fixing is performed by clamping the supporting blocks 5. The first port 11 and the third port 12 are used for transmitting and receiving signals, and the second port 10 is used for connecting an antenna. Through adopting the components of a whole that can function independently design with the waveguide cavity, divide into the three-layer with it, make first port 11 and third port 12 be located same side, second port 10 makes on another side send-receive signal and meet antenna no longer same side on, conveniently connects, need not the switching, and whole size is little, dismantles simple to operate, and device insertion loss is little.

Be equipped with supporting shoe 5 that the polytetrafluoroethylene material was made on the lower terminal surface of last cavity 3 and the up end of cavity 7 down, supporting shoe 5 is used for fixed ferrite 6, not only can play the supporting role to ferrite 6, can also make ferrite 6 when magnetizing under the magnetic field effect of upper permanent magnet 2 and lower permanent magnet 8, when guaranteeing 6 pieces of magnetized magnetic field intensity of ferrite, effectively expand product frequency bandwidth.

An upper matching step 13 is fixed at a position corresponding to the second port 10 in the T-shaped cavity, and the second port 10 is turned out through the upper matching step 13.

Lower matching steps 14 are respectively fixed at the positions corresponding to the first port 11 and the third port 12 in the T-shaped cavity, and the first port 11 and the third port 12 are turned out through the corresponding lower matching steps 14.

The magnetic field-increasing device is characterized in that an upper magnetic field cavity is arranged at the top of the upper cavity 3, a permanent magnet 2 is packaged in the upper magnetic field cavity, an upper cover plate 1 is fixed in the upper magnetic field cavity, and the upper cover plate 1 is used for packaging the permanent magnet 2.

The top of the lower cavity 7 is provided with a lower magnetic field cavity, the lower magnetic field cavity is internally provided with a lower permanent magnet 8 in an encapsulating manner, a lower cover plate 9 is fixed in the lower magnetic field cavity, and the lower cover plate 9 is used for encapsulating the lower permanent magnet 8.

The upper magnetic field cavity and the lower magnetic field cavity are corresponding in position and do not penetrate through the corresponding upper cavity 3 and the corresponding lower cavity 7.

The upper cavity 3, the middle cavity 4 and the lower cavity 7 are fixed through screws.

The central lines of the upper magnetic field cavity, the lower magnetic field cavity and the ferrite 6 are on the same straight line.

The working principle of the embodiment is as follows: the first port, the second port and the third port form a T-shaped structure together, the T-shaped structure is a three-port waveguide Y-junction circulator, and can be regarded as a device in which three identical waveguides and a waveguide cavity are coupled through a larger coupling hole, namely TE10 waves input from the first port enter the waveguide cavity and then excite TM110 standing waves of an upper magnetic field cavity and a lower magnetic field cavity, if no external bias field exists, the ferrite is not magnetized, the TM110 standing waves can be coupled with equal energy at the second port and a load port, if the ferrite is proper in size, the direction and the size of the external bias magnetic field are proper, due to the gyromagnetic effect, field distribution in the cavity can rotate around a central shaft by 30 degrees, so that two transverse magnetic closing curves of the standing waves in the cavity are in equal amplitude and opposite phase at the load port, at the moment, a microwave electromagnetic field is only coupled to the second port, and in the same way, electromagnetic waves input from the second port are only coupled to the third port, and electromagnetic waves input from, thereby realizing the circulating function.

It will be understood by those skilled in the art that any combination of the elements of the present invention, including the summary and detailed description of the invention provided in the foregoing description and illustrated in the accompanying drawings, is not to be considered limiting in scope and in order to make the description more concise, and not to describe every element of the combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waveguide circulator comprises a waveguide cavity and ferrite, and is characterized in that: the waveguide cavity comprises an upper cavity, a middle cavity and a lower cavity, the middle cavity is located between the upper cavity and the lower cavity, a second port is arranged on the upper cavity, a first port and a third port which are parallel to each other are arranged on the lower cavity, a through T-shaped cavity is arranged in the center of the middle cavity, a T-shaped structure is formed by the first port, the second port and the third port and is correspondingly matched with the T-shaped cavity, a pair of supporting blocks are arranged in the T-shaped cavity, ferrite is placed between the supporting blocks, is located in the center of the T-shaped cavity, and is fixed through compression of the upper cavity and the lower cavity.

2. A waveguide circulator as claimed in claim 1, wherein: an upper matching step is fixed at a position corresponding to the second port in the T-shaped cavity, and the second port is turned out through the upper matching step.

3. A waveguide circulator as claimed in claim 2, wherein: lower matching steps are respectively fixed at the positions corresponding to the first port and the third port in the T-shaped cavity, and the first port and the third port are turned out through the corresponding lower matching steps.

4. A waveguide circulator as claimed in claim 1, wherein: an upper magnetic field cavity is arranged at the top of the upper cavity, and an upper permanent magnet is packaged in the upper magnetic field cavity.

5. A waveguide circulator as claimed in claim 4, wherein: the top of cavity is equipped with down the magnetic field chamber down, the interior permanent magnet that encapsulates of magnetic field chamber down.

6. A waveguide circulator as claimed in claim 5, wherein: the upper magnetic field cavity and the lower magnetic field cavity are corresponding in position and do not penetrate through the corresponding upper cavity and the corresponding lower cavity.

7. A waveguide circulator as claimed in claim 1, wherein: the upper cavity, the middle cavity and the lower cavity are fixed through screws.

8. A waveguide circulator as claimed in claim 5, wherein: the central lines of the upper magnetic field cavity, the lower magnetic field cavity and the ferrite are on the same straight line.

9. A waveguide circulator as claimed in claim 1, wherein: the supporting block is made of polytetrafluoroethylene materials.

10. A waveguide circulator as claimed in claim 1, wherein: the ferrite is a cylindrical structure.