High-power waveguide circulator

Abstract

The utility model relates to a high-power waveguide circulator, which comprises a waveguide cavity and a cover plate, three channels arranged in a Y shape are arranged in the waveguide cavity, the middle parts of the three channels are converged, the angle between two adjacent channels is degree, a boss is arranged at the convergence part of the channels, the boss comprises a bottom table and a surface table, and the bottom table and the surface table are arranged on the waveguide cavity. The bottom table and the surface table are triangular and are overlapped, corners of the surface table and the bottom table directly face the channel, the surface of the surface table is provided with a mounting hole, a spring column is arranged in the mounting hole, the top of the spring column is provided with a connecting buckle, the connecting buckle is inserted into the ferrite, the peripheral surface of the ferrite is attached to the inner wall of the mounting hole, and the cover plate is detachably mounted on the waveguide cavity. A mounting groove is formed in the middle of the cover plate, a permanent magnet is mounted in the mounting groove, and the permanent magnet is magnetically connected with the ferrite. The ferrite is elastically supported by the spring column, hard contact and damage of the ferrite and the permanent magnet are avoided, the spring column can be hung by the connecting buckle, and the spring column is prevented from being taken away by the permanent magnet when the cover plate is disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of waveguide circulator, especially to a high-power waveguide circulator. BACKGROUND

[0002] The circulator is a kind of three-port nonreciprocal device, with the characteristics of one-way transmission of high-frequency signal energy.The circulator is widely used in communication base station system, radar system, etc.In these systems, the main role is as a transmit-receive isolation, power amplifier and low-noise amplifier input-output isolation and decoupling, etc., so as to achieve the purpose of protecting the system, improving the stability and reliability of the system.With the development of the globalization of mobile communication and the determination of 5G communication high frequency spectrum, the demand for circulators, especially high-power waveguide circulators, will be more and more.With the increasing integration of communication base station system, it is necessary to integrate the waveguide circulator directly into the waveguide front-end diplexer in more occasions, and the requirements for mass production, low cost and integration of waveguide circulator are also higher and higher.In the prior art, the commonly used Y-shaped junction three-channel design usually adopts a base cavity and a cover plate to cooperate with packaging, and the permanent magnet and the ferrite are opposite during packaging, but because the ferrite is hard and brittle, the permanent magnet and the ferrite are directly in hard contact during pressing and magnetic attraction, which may cause damage to the ferrite during assembly, resulting in high assembly cost, so it needs to be improved. SUMMARY

[0003] Therefore, it is necessary to provide a high-power waveguide circulator in view of the above problems.

[0004] A high-power waveguide circulator, comprising a waveguide cavity and a cover plate, three channels arranged in Y shape are arranged in the waveguide cavity, the three channels converge in the middle, and the angle between the two adjacent channels is 60 degrees, a boss is arranged at the convergence of the channels, the boss comprises a bottom platform and a surface platform, the bottom platform and the surface platform are both triangular, and the side length of the surface platform is smaller than that of the bottom platform, the surface platform and the bottom platform are overlapped and placed, the edge corners of the surface platform and the bottom platform are opposite to the channels, the surface of the surface platform is provided with a mounting hole, a spring column is arranged in the mounting hole, the top of the spring column is provided with a connecting buckle, the connecting buckle is movably inserted into the bottom of the ferrite, the outer circumferential surface of the ferrite is attached to the inner wall of the mounting hole, the cover plate is detachably mounted on the waveguide cavity, a mounting groove is arranged in the middle of the cover plate, a permanent magnet is mounted in the mounting groove, and the permanent magnet is magnetically connected with the ferrite.

[0005] Preferably, the connecting buckle comprises a ring and an elastic hook, the ring is sleeved on the top of the spring column, the lower end of the two elastic hooks is connected with the ring, and the upper end of the elastic hook is movably clamped in the ferrite.

[0006] Preferably, the outer circumferential surface of the ferrite is sleeved with a rubber ring.

[0007] The utility model discloses the beneficial effect lies in: utilize spring post elastic support ferrite, avoid ferrite and permanent magnet hard contact, damage, and the connecting buckle can hang and connect the spring post, avoid when dismantling the cover, and the spring post is taken away by permanent magnet. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is a kind of high-power waveguide circulator three-dimensional schematic view for one embodiment;

[0009] Fig. 2 It is a kind of high-power waveguide circulator explosion schematic view;

[0010] Fig. 3 It is spring post and connecting buckle assembly three-dimensional schematic view. DETAILED DESCRIPTION

[0011] To make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is explained in detail below with the drawings.In the following description, a lot of specific details are set forth to facilitate a full understanding of the utility model.However, the utility model can be implemented in many other ways different from the description herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the following disclosed specific embodiments.

[0012] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element present.When an element is considered "connected" to another element, it can be directly connected to another element or a middle element can be present simultaneously.The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs.The terms used in the specification of the utility model herein are only for the purpose of describing the specific implementation and are not intended to limit the utility model.The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0014] As Figs. 1-3As shown, a kind of high-power waveguide circulator, including waveguide cavity 1 with cover plate 2, three channels 11 are arranged in the waveguide cavity 1 in Y-shaped arrangement, the middle of three the channel 11 converges, and the angle between adjacent two the channel 11 is 120 degrees, the converging place of the channel 11 is provided with boss 3, the boss 3 includes bottom table 31 with face table 32, the bottom table 31 with face table 32 all are triangle, and the side length of face table 32 is less than the side length of bottom table 31, face table 32 and bottom table 31 overlap and place, the edge corner of face table 32 and bottom table 31 is opposite the channel 11, the table top of face table 32 is provided with mounting hole 321, spring column 4 is provided in the mounting hole 321, the top of spring column 4 is with connecting buckle 41, connecting buckle 41 is movably inserted into the bottom of ferrite 5, the outer circumferential surface of ferrite 5 is attached to the inner wall of mounting hole 321, the cover plate 2 can be detachably installed on waveguide cavity 1, the middle of the cover plate 2 is provided with mounting groove 21, permanent magnet 6 is installed in the mounting groove 21, and the permanent magnet 6 is magnetically connected with ferrite 5.In this embodiment, the waveguide cavity 1 and the cover plate 2 are both made of metal, three channels 11 are hollowed out in the waveguide cavity 1, three channels 11 are distributed in Y-shaped, extend three ports, and at the middle converging place of channel 11, the boss 3 of the overlapped bottom table 31 and face table 32 is arranged, the boss 3 is used for matching other waveguide structure, reducing reflection and loss, and improving transmission efficiency. And the bottom table 31 and the face table 32 are all triangle, due to the existence of the two triangular bosses, the entire circulator frequency response curve meets the second-order Chebyshev response curve, and has relatively wide working bandwidth. The mounting hole 321 is arranged on the face table 32 for mounting the spring column 4 and the ferrite 5, based on the gyromagnetic property of the ferrite 5, under the action of an additional bias magnetic field, the ferrite 5 can make the polarization rotation and energy absorption of the electromagnetic wave propagating therein, so that unidirectional transmission is realized. Because the ferrite 5 is hard and brittle, in order to realize the elastic connection with the permanent magnet 6 mounted on the cover plate 2, the ferrite 5 is mounted in the mounting hole 321 through the spring column 4, so that the ferrite 5 can be lowered when pressed by the permanent magnet 6, to avoid hard contact with the permanent magnet and cause damage. When the cover plate 2 is disassembled, because the permanent magnet 6 and the ferrite 5 are magnetically adsorbed and connected, in order to prevent the ferrite 5 from being adsorbed and taken out of the mounting hole 321 by the permanent magnet 6, the connecting buckle 41 is arranged on the top of the spring column 4, the connecting buckle 41 is movably inserted into the bottom of the ferrite 5, the ferrite 5 can be hung, to avoid the ferrite 5 from being magnetically adsorbed and taken out by the permanent magnet 6.

[0015] As Fig. 3As shown, the connecting buckle 41 includes a ring 411 and elastic hooks 412. The ring 411 is sleeved on the top of the spring post 4, and the lower ends of the two elastic hooks 412 are connected to the ring 411. The upper ends of the elastic hooks 412 are movably engaged inside the ferrite 5. Specifically, the hook portions of the two elastic hooks 412 are opposite to each other and are made of plastic. After the elastic hooks 412 are inserted into the ferrite 5, they are engaged with the trapezoidal structure on the inner wall of the ferrite 5, thereby securing the entire ferrite 5 and preventing the ferrite 5 from being pulled away by the permanent magnet 6 when the cover plate 2 is disassembled.

[0016] like Fig. 2 As shown, a rubber ring 51 is fitted on the outer peripheral surface of the ferrite 5 to fill the gap between the ferrite 5 and the mounting hole 321.

[0017] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-power waveguide circulator, characterized in that: The device includes a waveguide cavity and a cover plate. The waveguide cavity contains three channels arranged in a Y-shape, converging at the center. The angle between adjacent channels is [degrees]. A boss is provided at the converging point of the channels. The boss includes a base platform and a surface platform, both triangular in shape, with the side length of the surface platform being shorter than that of the base platform. The surface platform and base platform overlap, with their corners facing the channels. A mounting hole is provided on the surface of the surface platform, and a spring post is installed within the mounting hole. The top of the spring post has a connecting buckle that movably inserts into the bottom of a ferrite core. The outer circumferential surface of the ferrite core fits against the inner wall of the mounting hole. The cover plate is detachably mounted on the waveguide cavity. A mounting groove is provided in the center of the cover plate, and a permanent magnet is installed within the mounting groove, magnetically connected to the ferrite core.

2. A high-power waveguide circulator as described in claim 1, characterized in that: The connecting buckle includes a ring and elastic hooks. The ring is sleeved on the top of the spring column, and the lower ends of the two elastic hooks are connected to the ring. The upper ends of the elastic hooks are movably engaged in the ferrite body.

3. A high-power waveguide circulator as described in claim 1, characterized in that: A rubber ring is fitted around the outer periphery of the ferrite.

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