CN214124078U

CN214124078U - High-power waveguide isolator

Info

Publication number: CN214124078U
Application number: CN202022918889.5U
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: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-03
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a high-power waveguide isolator, including waveguide cavity, matching step, ferrite, absorber, the waveguide cavity is including last cavity and the lower cavity of being range from top to bottom, it matches the recess to go up the cavity and seted up Y type respectively on the relative terminal surface of cavity down, Y type matches the step and puts into Y type respectively and matches the recess in, matches the circular recess of seting up respectively with the ferrite on the step center, the ferrite directly pastes in circular recess. The opposite end surfaces of the upper cavity and the lower cavity are respectively provided with a load cavity, and the absorbers are respectively placed in the load cavities. The utility model has the advantages of higher firmness and reliability of the installation and bonding mode, accurate positioning, no need of tools or vernier caliper measurement, simple and convenient installation mode; meanwhile, different matching blocks can be replaced for products with different frequencies.

Description

High-power waveguide isolator

Technical Field

The utility model relates to an isolator technical field especially relates to a be applied to technical field's such as high power microwave radar, microwave communication, electronic countermeasure, microwave energy application waveguide isolator specifically is a high-power waveguide isolator.

Background

The isolator is a non-reciprocal two-port microwave ferrite device. The electromagnetic wave feed source only allows electromagnetic waves to pass in a single direction, electromagnetic waves transmitted in the opposite direction can generate great attenuation, and the electromagnetic wave feed source is usually used for isolating a feed source and a load and eliminating the influence of frequency drift and the like caused by electromagnetic wave reflection. In practical application, the standing wave coefficient of the whole machine system can be effectively improved, the feed source is protected, and the functions of receiving and transmitting duplex and the like are effectively improved.

Aiming at the innovation direction of the current broadband and high-performance isolator, China with publication number CN209561593U specially facilitates 2019, 10 and 29, discloses a K-waveband waveguide isolator, which comprises: the waveguide cavity comprises an upper cavity and a lower cavity, the lower end face of the upper cavity is opposite to the upper end face of the lower cavity, a pair of ferrites are arranged at opposite positions respectively, an upper permanent magnet is tightly pressed in an upper magnetic field cavity of the upper cavity through an upper piece of a magnetic loop, a lower permanent magnet is tightly pressed in a lower magnetic field cavity of the lower cavity through a lower piece of the magnetic loop, the absorber is arranged in a load port, and the absorber is tightly pressed in the load port through the load cavity. This patent adopts the design that metal matches the step and circular metal matches the step not only can play the supporting role to this a pair of ferrite, can also make the ferrite piece when magnetizing under the magnetic field effect of permanent magnet piece, when guaranteeing ferrite piece magnetic field intensity, has increased the electric distance between two ferrite pieces to effectively expand product frequency bandwidth.

With the continuous development of microwave technology, the power index requirements of the waveguide isolator are higher and higher, the frequency is diversified, and the existing waveguide isolator cannot meet the requirements.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model provides a high-power waveguide isolator.

The utility model discloses a realize through following technical scheme:

a high-power waveguide isolator comprises a waveguide cavity, matching steps, ferrites and an absorber, wherein the waveguide cavity comprises an upper cavity and a lower cavity which are arranged up and down, matching grooves matched with the matching steps are respectively formed in the opposite end surfaces of the upper cavity and the lower cavity, the matching steps are directly pasted in the matching grooves, grooves matched with the ferrites are formed in the centers of the matching steps, and the ferrites are directly pasted in the grooves; the opposite end surfaces of the upper cavity and the lower cavity are respectively provided with a load cavity, and the absorber is placed in the load cavity; the upper cavity and the lower cavity are respectively provided with a magnetic field cavity, a permanent magnet is arranged in the magnetic field cavity, and the permanent magnet is packaged in the upper cavity and the lower cavity through a cover plate.

In any of the above schemes, preferably, the matching groove is a Y-shaped metal matching groove, and the matching step is a Y-shaped metal matching step.

In any of the above aspects, preferably, the Y-shaped metal matching step is embedded in the Y-shaped metal matching groove.

In any of the above schemes, preferably, a circular groove is provided at the center of the Y-shaped metal matching step.

In any of the above solutions, preferably, a circular ferrite is disposed in the circular groove.

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, an upper permanent magnet is encapsulated on the upper end face of the upper cavity, and a lower permanent magnet is encapsulated on the lower end face of the lower cavity.

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; 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.

In any of the above aspects, preferably, the absorber has a ramp-like structure.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a set up Y type metal matching groove on upper chamber body and lower chamber body to in placing the matching groove with Y type metal matching step, directly paste the ferrite in the circular recess of Y type metal matching step again, different Y type matching steps are changed to the device of different frequencies, and fastness and reliability are higher, and the location is accurate, need not rely on frock or vernier caliper size, and the mounting means is simple and convenient;

the ferrite is round high-power ferrite and adopts a lithium ferrite material, so that the device has the characteristics of high power and good temperature stability;

the utility model discloses a split type waveguide cavity, it is fixed with last cavity and lower cavity through the screw-up, be convenient for installation and dismantlement can also effectively reduce device male loss.

Drawings

Fig. 1 is an overall exploded view of a high power waveguide isolator according to an embodiment of the present invention;

fig. 2 is a schematic view of the overall structure of the installed high-power waveguide isolator according to the present invention.

In the figure: 1. an upper cavity; 2. an absorbent body; 3. a circular groove; 4. a Y-shaped groove; 5. a load chamber; 6. a lower cavity; 7. an upper cover plate; 8. an upper permanent magnet; 9. a magnetic field cavity; 10. a Y-shaped matching step; 11. a ferrite; 12. a lower permanent magnet; 13. a lower cover plate.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

As shown in fig. 1-2, according to the utility model provides a pair of an embodiment of high-power waveguide isolator, including waveguide cavity, ferrite 11, the waveguide cavity is including last cavity 1 and lower cavity 6 that are arranged from top to bottom, be equipped with Y type recess 4 on the terminal surface of last cavity 1 and lower cavity 6 respectively, it matches step 10 to install the Y type respectively on the terminal surface that goes up cavity 1 and lower cavity 6 are relative, and goes up the Y type on cavity 1 and the lower cavity 6 and match step 10 and be located the central part of waveguide cavity, wherein set up the circular recess 3 that matches with ferrite 11 on the Y type matches step 10, ferrite 11 places in circular recess 3, and absorber 2 places and fixes in load cavity 5 between last cavity 1 and lower cavity 6.

Further, the matching block 12 is a Y-shaped metal matching step, and is respectively embedded in the upper cavity 1 and the lower cavity 6.

Furthermore, the ferrite 11 is a circular ferrite and is made of a high-power material, so that the device has the characteristics of high power, high frequency, wide frequency and good temperature stability.

Further, the circular ferrites 11 are respectively embedded in the circular grooves 3 at the centers of the Y-shaped metal matching steps. When the ferrite 11 is magnetized under the action of the magnetic field of the permanent magnet sheet, the intensity of the magnetized magnetic field of the ferrite 11 is ensured, and various electrical performance indexes can be effectively ensured.

Further, the absorber 2 is packaged in the upper cavity 1 and the lower cavity 6 and fixed.

Further, the absorber is a slope-shaped absorber.

Further, the absorber is a high power material: silicon carbide.

Further, an upper permanent magnet 8 is packaged on the upper end face of the upper cavity 1, and a lower permanent magnet 12 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 1 and the lower end face of the lower cavity 6.

Further, the upper cavity 1 encapsulates an upper permanent magnet 8 in a corresponding magnetic field cavity 9 through an upper cover plate 7.

Further, the lower cavity 6 encapsulates the lower permanent magnet 12 in the corresponding magnetic field cavity through the lower cover plate 13.

Further, go up cavity 1 and cavity 6 down and pass through the fix with screw, adopt split type waveguide chamber, it is fixed with cavity 6 down to go up cavity 1 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, due to the gyromagnetic effect, the field distribution in the cavity can rotate around the central axis by 30 degrees, 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, the electromagnetic wave input from the third port is only coupled to the first port, thereby realizing the function of circulating, and the isolator is formed by connecting the load to the third port.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a high-power waveguide isolator, includes waveguide cavity, matching step, ferrite, absorber, its characterized in that: the waveguide cavity comprises an upper cavity and a lower cavity which are arranged up and down, matching grooves matched with the matching steps are respectively formed in the opposite end faces of the upper cavity and the lower cavity, the matching steps are directly pasted in the matching grooves, a groove matched with ferrite is formed in the center of each matching step, and the ferrite is directly pasted in the grooves; the opposite end surfaces of the upper cavity and the lower cavity are respectively provided with a load cavity, and the absorber is placed in the load cavity; the upper cavity and the lower cavity are respectively provided with a magnetic field cavity, a permanent magnet is arranged in the magnetic field cavity, and the permanent magnet is packaged in the upper cavity and the lower cavity through a cover plate.

2. The high power waveguide isolator of claim 1, wherein: the matching groove is a Y-shaped metal matching groove, and the matching step is a Y-shaped metal matching step.

3. The high power waveguide isolator of claim 2, wherein: the Y-shaped metal matching step is embedded into the Y-shaped metal matching groove.

4. The high power waveguide isolator of claim 2, wherein: and a circular groove is formed in the center of the Y-shaped metal matching step.

5. The high power waveguide isolator of claim 4, wherein: and a circular ferrite is arranged in the circular groove.

6. The high power waveguide isolator 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 high power waveguide isolator 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.

8. The high power waveguide isolator of claim 7, wherein: the upper permanent magnets are encapsulated in the corresponding magnetic field cavities by the upper cavity body through the upper cover plate; the lower cavity encapsulates the lower permanent magnet in the corresponding magnetic field cavity through the lower cover plate.

9. The high power waveguide isolator of claim 1, wherein: the absorber is of a slope type structure.

10. The high power waveguide isolator according to any one of claims 1-9, wherein: the upper cavity and the lower cavity are fixed through screws.