CN211404700U

CN211404700U - Miniaturized waveguide circulator

Info

Publication number: CN211404700U
Application number: CN202020405825.2U
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 miniaturized waveguide circulator, including waveguide cavity, ferrite, the last cavity and the lower cavity of arranging about being are drawn together to the waveguide cavity, be equipped with Y shape knot formula structure on the up end of cavity down, be fixed with respectively on going up the cavity and the relative terminal surface of cavity down and match the step, wherein the matching step on the cavity is located the central point of waveguide cavity down, sets up the recess that matches with the ferrite on one of them matching step, the ferrite is placed in the recess. The matching steps are arranged on the upper cavity and the lower cavity, the groove is formed in one of the matching steps, the ferrite is directly pasted in the groove, firmness and reliability are higher, positioning is accurate, the size of the ferrite does not need to be measured by means of a tool or a vernier caliper, and the installation mode is simple and convenient.

Description

Miniaturized waveguide circulator

Technical Field

The utility model relates to a circulator technical field, concretely relates to miniaturized 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. However, in the installation process of the existing circulator, the installation position of the ferrite can be accurately determined only through a tool or a vernier caliper, the operation is complicated, and the installation mode is complex and not quick.

SUMMERY OF THE UTILITY MODEL

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

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

the utility model provides a miniaturized waveguide circulator, includes waveguide cavity, ferrite, the waveguide cavity is including being last cavity and the lower cavity of arranging from top to bottom, be equipped with Y shape knot formula structure on the up end of cavity down, Y shape knot formula structure includes first port, second port and third port, first port and third port are parallel side by side, it matches the step to be fixed with respectively on the relative terminal surface of last cavity and lower cavity, wherein matches the central part that the step is located waveguide cavity on the cavity down, sets up the recess that matches with the ferrite on one of them matches the step, the ferrite is placed in the recess, the ferrite passes through polytetrafluoroethylene piece and matches the step butt with another to it is fixed to the ferrite centre gripping.

Preferably, the matching step is a triangular metal matching step or a circular metal matching step.

In any of the above embodiments, preferably, the ferrite and the teflon sheet are both triangular structures.

In any of the above aspects, preferably, the groove is a triangular groove.

In any of the above schemes, preferably, the upper end surface of the upper cavity is encapsulated with an upper permanent magnet, and the lower end surface of the lower cavity is encapsulated with a lower permanent magnet.

In any of the above schemes, preferably, the upper end surface of the upper cavity and the lower end surface of the lower cavity are both provided with magnetic field cavities.

In any of the above schemes, preferably, the upper cavity encapsulates the upper permanent magnet in the corresponding magnetic field cavity through the upper cover plate.

In any of the above schemes, preferably, the lower cavity encapsulates the lower permanent magnet in the corresponding magnetic field cavity through the lower cover plate.

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

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

1. the upper cavity and the lower cavity are provided with the matching steps, one of the matching steps is provided with the groove, and the ferrite is directly pasted in the groove, so that the ferrite has higher firmness and reliability, is accurate in positioning, does not need to use tools or vernier calipers for measuring the size, and is simple and convenient in installation mode;

2. the ferrite is triangular ferrite and is made of nickel-zinc ferrite material, so that the device has the characteristics of high frequency, wide frequency and good temperature stability;

3. the split waveguide cavity is adopted, the upper cavity and the lower cavity are fixed through screw fastening, the installation and the disassembly are convenient, and the insertion loss of devices can be effectively reduced.

Drawings

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

fig. 2 is a schematic view of the overall structure 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 polytetrafluoroethylene sheets; 5. a ferrite; 6. a lower cavity; 7. matching steps; 8. a lower permanent magnet; 9. a lower cover plate; 10. a second port; 11. a first port; 12. a third port; 13. and (4) a groove.

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 miniaturized waveguide circulator provided by the present invention includes a waveguide cavity and a ferrite 5, the waveguide cavity includes an upper cavity 3 and a lower cavity 6 arranged up and down, a Y-shaped structure is disposed on an upper end surface of the lower cavity 6, the Y-shaped structure includes a first port 11, a second port 10 and a third port 12, the first port 11 and the third port 12 are parallel, matching steps 7 are respectively fixed on opposite end surfaces of the upper cavity 3 and the lower cavity 6, wherein the matching step 7 on the lower cavity 6 is located at a central portion of the waveguide cavity, one of the matching steps 7 is provided with a groove 13 matching with the ferrite 5, the ferrite 5 is placed in the groove 13, the ferrite 5 is abutted against the other matching step 7 through a teflon sheet to clamp and fix the ferrite 5, the top end surface of the ferrite 5 extends above the recess 13.

It should be noted that, the groove 13 can be arranged on the matching step 7 on the upper cavity 3, and also on the matching step 7 on the lower cavity 6, and the ferrite 5 is directly adhered in the groove 13, so that the firmness and reliability are higher, the positioning is accurate, the size of the ferrite does not need to be measured by means of a tool or a vernier caliper, and the installation mode is simple and convenient.

Further, match step 7 and match step 7 for triangle-shaped metal matching step 7 or circular metal, the design that adopts matching step 7 and polytetrafluoroethylene piece not only can play the supporting role to ferrite 5, can also make 5 pieces of ferrite when magnetizing under the magnetic field effect of permanent magnet piece, when guaranteeing 5 pieces of ferrite magnetizing magnetic field intensity, can also effectively expand product frequency bandwidth.

Furthermore, the ferrite 5 and the polytetrafluoroethylene sheet are both in a triangular structure, the ferrite 5 is the triangular ferrite 5, and the nickel zinc ferrite 5 material is adopted, so that the device has the characteristics of high frequency, wide frequency and good temperature stability.

Further, the groove 13 is a triangular groove 13.

Further, an upper permanent magnet 2 is packaged on the upper end face of the upper cavity 3, and a lower permanent magnet is packaged on the lower end face of the lower cavity 6.

Furthermore, magnetic field cavities are arranged on the upper end face of the upper cavity 3 and the lower end face of the lower cavity 6.

Further, the upper cavity 3 encapsulates the upper permanent magnet 2 in the corresponding magnetic field cavity through the upper cover plate 1.

Further, the lower cavity 6 encapsulates the lower permanent magnet 8 in the corresponding magnetic field cavity through the lower cover plate 9.

Further, go up cavity 3 and cavity 6 down and pass through the fix with screw, adopt split type waveguide chamber, it is fixed with cavity 3 and cavity 6 down through the screw-up, be convenient for install and dismantle, can also effectively reduce device inserted loss.

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

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 miniaturized waveguide circulator comprises a waveguide cavity and ferrite, and is characterized in that: the waveguide cavity is including being last cavity and lower cavity of arranging from top to bottom, be equipped with Y shape knot formula structure on the up end of cavity down, Y shape knot formula structure includes first port, second port and third port, first port and third port are parallel side by side, it is fixed with the matching step respectively on the relative terminal surface of cavity with down to go up the cavity, wherein matches the step on the cavity down and is located the central point of waveguide cavity, sets up the recess that matches with the ferrite on one of them matching step, the ferrite is placed in the recess, the ferrite passes through polytetrafluoroethylene piece and another matching step butt to it is fixed to the ferrite centre gripping.

2. The miniaturized waveguide circulator of claim 1, wherein: the matching step is a triangular metal matching step or a circular metal matching step.

3. The miniaturized waveguide circulator of claim 1 or 2, wherein: the ferrite and the polytetrafluoroethylene sheet are both triangular structures.

4. The miniaturized waveguide circulator of claim 3, wherein: the grooves are triangular grooves.

5. The miniaturized waveguide circulator of claim 1, wherein: an upper permanent magnet is packaged on the upper end face of the upper cavity, and a lower permanent magnet is packaged on the lower end face of the lower cavity.

6. The miniaturized waveguide circulator of claim 1, wherein: and the upper end surface of the upper cavity and the lower end surface of the lower cavity are respectively provided with a magnetic field cavity.

7. The miniaturized waveguide circulator of claim 1, wherein: the upper permanent magnet is encapsulated in the corresponding magnetic field cavity through the upper cover plate by the upper cavity.

8. The miniaturized waveguide circulator of claim 7, wherein: the lower cavity encapsulates the lower permanent magnet in the corresponding magnetic field cavity through the lower cover plate.

9. The miniaturized waveguide circulator of any one of claims 4-8, wherein: the upper cavity and the lower cavity are fixed through screws.