CN219610713U

CN219610713U - Coaxial waveguide isolator

Info

Publication number: CN219610713U
Application number: CN202320818916.2U
Authority: CN
Inventors: 张伟; 彭华
Original assignee: Shenzhen Huayang Technology Development Co Ltd
Current assignee: Shenzhen Huayang Technology Development Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-08-29
Anticipated expiration: 2033-04-06

Abstract

The utility model discloses a coaxial waveguide isolator, which comprises an upper cavity and a lower cavity which are oppositely arranged, wherein an upper ferrite, an upper medium ring, a central conductor, a lower medium ring and a lower ferrite are sequentially arranged between the upper cavity and the lower cavity; the upper cavity is provided with a first groove, and an upper permanent magnet and an upper magnetic homogenizing sheet are arranged in the first groove; the lower cavity is provided with a second groove, and the second groove is provided with a lower permanent magnet and a lower even magnetic sheet; the center conductor is a double Y-shaped center conductor. The utility model adopts the design of the strip line lamination form, thereby being convenient for the installation and the debugging of the whole device; meanwhile, chamfering is carried out at the corner of the center conductor, and a dielectric film is arranged between the ferrite and the center conductor, so that the ferrite and the center conductor are effectively separated, the phenomena of breakdown or edge ignition in the ferrite and the center conductor are prevented under the holding, and the running stability of the device is improved; the waveguide load device is designed, and the power capacity of the whole device is improved through the design of the waveguide load and the radiating fins.

Description

Coaxial waveguide isolator

Technical Field

The utility model relates to the technical field of isolators, in particular to a coaxial waveguide isolator

Background

Ferrite isolators are a type of microwave ferrite device with non-reciprocal properties. One end of the ferrite isolator is connected with a matched load, and the other two ports are respectively used as an input port and an output port; the working principle of the ferrite isolator is as follows: the ferrite generates gyromagnetic effect by an externally applied magnetic field, and electromagnetic waves propagating in the ferrite generate polarization rotation and electromagnetic wave energy is strongly absorbed by utilizing the gyromagnetic characteristic, so that the electromagnetic waves are controlled to be transmitted along a certain annular direction, the effect of unidirectional transmission and isolation reverse transmission is achieved, and the gyromagnetic electromagnetic wave is often applied to microwave systems.

At present, the size of the isolator is relatively large in the market, and because the size of the cavity is relatively large compared with that of the traditional surface-mounted or embedded circulator, when the device is designed, the design mode of the magnetic field with the working area of the magnetic field lower than the resonance field is generally selected, and the design mode is simply called low-field design (the magnetic field is higher than the resonance field and is called high-field). However, the low-field design has many problems in the background, for example, with increasing input power, the secondary absorption peak and the ferromagnetic resonance curve width in the low-field region are larger and larger, resulting in the increase of low-field loss, poor electrical performance (electrical performance refers to return loss, insertion loss, isolation and the like), and unstable gyromagnetic characteristics of ferrite in the low-field environment.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the coaxial waveguide isolator is suitable for the environment background of high fields, and improves the electrical performance of the isolator under the condition of high-power signal clamping.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the coaxial waveguide isolator comprises an upper cavity and a lower cavity which are oppositely arranged, wherein an upper ferrite, an upper medium ring, a central conductor, a lower medium ring and a lower ferrite are sequentially and coaxially arranged between the upper cavity and the lower cavity;

a first groove is formed in one side, far away from the lower cavity, of the upper cavity, and an upper permanent magnet and an upper magnetic homogenizing sheet are arranged in the first groove; a second groove is formed in one side, far away from the upper cavity, of the lower cavity, and a lower permanent magnet and a lower magnetic homogenizing sheet are arranged in the second groove; the center conductor is a double Y-shaped center conductor.

Further, corner of the double Y-shaped central conductor is rounded.

Further, an upper dielectric film is arranged between the upper dielectric ring and the central conductor, and a lower dielectric film is arranged between the lower dielectric ring and the central conductor.

Further, the upper dielectric film and the lower dielectric film are polytetrafluoroethylene dielectric films.

Further, the device also comprises a waveguide load device, wherein the waveguide load device comprises a load integration and a coaxial connector integration, and one end of the coaxial connector integration is connected with one branch of the central conductor in a fitting way;

the load integration comprises a waveguide load device and a waveguide flange plate, wherein the waveguide flange plate is connected with an opening of the waveguide load device in an assembling mode, a plurality of groups of radiating fins and connector interfaces are arranged on the waveguide load device, and the connector interfaces are connected with the other end of the coaxial connector integration in an assembling mode.

Further, the coaxial connector assembly comprises an N-type female radio frequency coaxial connector and an N-type male radio frequency coaxial connector which are assembled and connected with each other, the other end of the N-type female radio frequency coaxial connector is assembled and connected with the connector interface, and the other end of the N-type male radio frequency coaxial connector is assembled and connected with one branch of the central conductor.

Further, the N-type female radio frequency coaxial connector comprises a connector flange, an insulating medium and a PIN needle, wherein the PIN needle is arranged on the outer surface of the connector flange, the insulating medium is arranged on the outer side of the PIN needle, and the connector flange is connected with the connector interface in an assembling mode.

Further, the device further comprises an upper cover plate and a lower cover plate, wherein the upper cover plate is located on one side, far away from the lower cavity, of the upper cavity, the lower cover plate is located on one side, far away from the upper cavity, of the lower cavity, the upper cover plate is connected with the upper cavity in an assembling mode, and the lower cover plate is connected with the lower cavity in an assembling mode.

Further, the outer surfaces of the upper cover plate and the lower cover plate are respectively provided with a plurality of groups of cooling fins.

Further, the upper cover plate is connected with the upper cavity in an assembling manner through a screw, and the lower cover plate is connected with the lower cavity in an assembling manner through a screw.

The utility model has the beneficial effects that: the utility model provides a coaxial waveguide isolator, which has the following advantages under the background of high-field design and input environment:

(1) The whole device is convenient to install and debug by the design of the strip line lamination form;

(2) The center conductor adopts double Y-shaped design, chamfering is performed at the corner of the double Y-shaped center conductor, and a dielectric film is arranged between the ferrite and the center conductor, so that the ferrite and the center conductor are effectively separated, the phenomenon of breakdown or edge ignition in the center conductor under the condition of holding is prevented, and the running stability of the device is improved.

(3) The waveguide load device is designed, and the power capacity of the whole device is improved through the design of the waveguide load and the radiating fins.

Drawings

FIG. 1 is a general diagram of a coaxial waveguide isolator according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a coaxial waveguide isolator according to an embodiment of the present utility model;

FIG. 3 is a partial enlarged view A of FIG. 2;

FIG. 4 is an exploded view of a waveguide loading apparatus of a coaxial waveguide isolator according to an embodiment of the present utility model;

fig. 5 is a front view of a coaxial waveguide isolator according to an embodiment of the present utility model;

FIG. 6 is a bottom view of a coaxial waveguide isolator according to an embodiment of the present utility model;

FIG. 7 is a data diagram of a chamfered center conductor of a coaxial waveguide isolator in accordance with an embodiment of the present utility model;

FIG. 8 is a data diagram of a center conductor of a coaxial waveguide isolator without chamfering in accordance with an embodiment of the present utility model;

FIG. 9 is a diagram of operational data of a coaxial waveguide isolator according to an embodiment of the present utility model;

description of the reference numerals:

100. a coaxial waveguide isolator; 200. A waveguide loading device;

101. an upper cavity; 102. A lower cavity; 103. An upper ferrite; 104. A medium ring is arranged on the upper part; 105. A center conductor; 106. A lower dielectric ring; 107. A lower ferrite; 108. An upper permanent magnet; 109. A magnetic sheet is uniformly arranged; 110. A lower permanent magnet; 111. A lower magnetic sheet; 112. A dielectric film is arranged on the substrate; 113. A lower dielectric film; 114. An upper cover plate; 115. A lower cover plate;

210. load integration; 220. A coaxial connector is integrated;

211. a waveguide loader; 212. A waveguide flange; 213. A heat sink; 214. A connector interface;

221. an N-type female radio frequency coaxial connector; 222. N-type male radio frequency coaxial connector; 223. A connector flange; 224. An insulating medium; 225. PIN needle.

Detailed Description

In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 and fig. 2, in an embodiment of the present utility model, a coaxial waveguide isolator 100 includes an upper cavity 101 and a lower cavity 102 that are disposed opposite to each other, and an upper ferrite 103, an upper dielectric ring 104, a central conductor 105, a lower dielectric ring 106 and a lower ferrite 107 are coaxially disposed between the upper cavity 101 and the lower cavity 102 in sequence;

a first groove is formed in one side, far away from the lower cavity 102, of the upper cavity 101, and an upper permanent magnet 108 and an upper magnetic homogenizing sheet 109 are arranged in the first groove; a second groove is formed in one side, far away from the upper cavity 101, of the lower cavity 102, and a lower permanent magnet 110 and a lower magnetic homogenizing sheet 111 are arranged in the second groove; the center conductor 105 is a double Y-shaped center conductor 105.

The device is designed according to a strip line lamination mode, wherein the strip line mode is a transmission line mode in which a dielectric medium is filled between an upper grounding surface and a lower grounding surface, and a conductor is embedded in the dielectric medium. The assembly sequence of the materials of the internal structure of the cavity is in the form of a strip line, the upper and lower magnetic uniform sheets serve as the grounding surface of the strip line, the combination of the ferrite-medium ring serves as a dielectric medium, and the conductor is the central conductor.

From the above description, the beneficial effects of the utility model are as follows: the coaxial waveguide isolator 100 is designed according to a strip line lamination mode, and when the coaxial waveguide isolator is assembled, the assembly can be completed by coaxially placing corresponding materials in sequence, and the coaxial waveguide isolator is of a symmetrical structure and is simple in assembly and disassembly processes; besides, the central conductor 105 adopts a double-Y-shaped structural design, so that impedance in the working process of the isolator can be matched conveniently, the frequency range can be adjusted, branches of the double-Y-shaped central conductor 105 are wider, the field intensity of an electric field generated by the edges of the branches is smaller, and the operation safety of the device is improved.

Further, the corner of the double-Y-shaped center conductor 105 is rounded; further, an upper dielectric film 112 is provided between the upper dielectric ring 104 and the center conductor 105, and a lower dielectric film 113 is provided between the lower dielectric ring 106 and the center conductor 105.

As can be seen from the above description, since the device is under the input working environment, the power born by the central conductor 105 is extremely high, and particularly the power is between 800W and 2000W, in order to prevent the point discharge at the corner of the branch of the central conductor 105, the corner of the whole central conductor 105 is rounded; in addition, in order to prevent the problem of edge ignition in the isolator and damage the ferrite, dielectric films are respectively arranged between the central conductor 105 and the upper ferrite 107 and between the upper ferrite 107, so that the ferrite and the central conductor 105 are effectively isolated; specifically, the dielectric film is a polytetrafluoroethylene dielectric film.

Further, the waveguide loading device 200 comprises a loading assembly 210 and a coaxial connector assembly 220, wherein one end of the coaxial connector assembly 220 is assembled and connected with one branch of the central conductor 105;

the load assembly 210 includes a waveguide load 211 and a waveguide flange 212, the waveguide flange 212 is assembled and connected with an opening of the waveguide load 211, the waveguide load 211 is provided with a plurality of groups of cooling fins 213 and a connector interface 214, and the connector interface 214 is assembled and connected with the other end of the coaxial connector assembly 220.

As can be seen from the above description, for matching the working environment, the waveguide load device 200 is disposed on one branch of the central conductor 105, and the waveguide load device 200 includes a load assembly 210 and a coaxial connector assembly 220, wherein the coaxial connector assembly 220 connects the waveguide load assembly 210 and the central conductor 105; the load integration comprises a waveguide load 211 and a waveguide flange 212, the waveguide flange 212 seals the opening of the waveguide load 211, and a plurality of groups of cooling fins 213 are arranged on the waveguide load 211 to prevent the isolator from overheating in the working process and causing shutdown.

Still further, the coaxial connector assembly 220 includes an N-type female rf coaxial connector 221 and an N-type male rf coaxial connector 222 that are assembled and connected to each other, wherein the other end of the N-type female rf coaxial connector 221 is assembled and connected to the connector interface 214, and the other end of the N-type male rf coaxial connector 222 is assembled and connected to one branch of the central conductor 105.

Still further, the N-type female rf coaxial connector 221 includes a connector flange 223, an insulating medium 224 and a PIN 225, the PIN 225 is disposed on the outer surface of the connector flange 223, the insulating medium 224 is disposed on the outer side of the PIN 225, and the connector flange 223 is assembled with the connector interface 214. The PIN 225 is a metal substance in the separator that is used to perform electrical conduction (transmission) of electricity (signals).

As can be seen from the above description, the coaxial connector assembly 220 includes an N-type female rf coaxial connector 221 and an N-type male rf coaxial connector 222 that are assembled and connected to each other; specifically, the N-type female rf coaxial connector 221 includes a connector flange 223, an insulating medium 224 and a PIN 225, the PIN 225 is disposed on an outer surface of the connector flange 223, the insulating medium 224 is disposed on an outer side of the PIN 225, the insulating medium 224 and the PIN 225 are inserted into the connector interface 214 to be conducted with the waveguide load device 211, and the connector flange 223 is assembled and connected with the connector interface 214. In addition, an N-type male rf coaxial connector 222 is coupled to one of the branches of the center conductor 105 to provide communication between the waveguide loading device 200 and the center conductor 105.

Further, the device further comprises an upper cover plate 114 and a lower cover plate 115, wherein the upper cover plate 114 is positioned on one side of the upper cavity 101 away from the lower cavity 102, the lower cover plate 115 is positioned on one side of the lower cavity 102 away from the upper cavity 101, the upper cover plate 114 is in assembled connection with the upper cavity 101, and the lower cover plate 115 is in assembled connection with the lower cavity 102.

Further, the outer surfaces of the upper cover plate 114 and the lower cover plate 115 are provided with a plurality of sets of cooling fins 213.

Further, the upper cover 114 is assembled and connected with the upper cavity 101 by a screw, and the lower cover 115 is assembled and connected with the lower cavity 102 by a screw.

As can be seen from the above description, in order to facilitate the assembly of the entire isolator device, the outer surfaces of the upper and lower chambers 101 and 102 are respectively provided with an upper cover plate 114 and a lower cover plate 115, while in order to satisfy the operation performance, the outer sides of the upper and lower cover plates 114 and 115 are simultaneously provided with a plurality of sets of cooling fins 213.

The coaxial waveguide isolator is suitable for an input working environment in a high-field background.

The first embodiment of the utility model is as follows:

referring to fig. 1 to 9, a coaxial waveguide isolator 100 includes an upper cavity 101 and a lower cavity 102 which are disposed opposite to each other, and an upper ferrite 103, an upper dielectric ring 104, a central conductor 105, a lower dielectric ring 106 and a lower ferrite 107 are coaxially disposed between the upper cavity 101 and the lower cavity 102 in order; a first groove is formed in one side, far away from the lower cavity 102, of the upper cavity 101, and an upper permanent magnet 108 and an upper magnetic homogenizing sheet 109 are arranged in the first groove; a second groove is formed in one side, far away from the upper cavity 101, of the lower cavity 102, and a lower permanent magnet 110 and a lower magnetic homogenizing sheet 111 are arranged in the second groove; the central conductor 105 is double Y-shaped, and an input branch and an output branch of the central conductor are respectively connected with an N-type radio frequency coaxial connector for connecting with the peripheral equipment; the upper cavity 101 and the lower cavity 102 are specifically assembled and connected in a manner of adopting a screw with a specification of PM2.5X6.

Namely, in the present embodiment, the coaxial waveguide isolator 100 is designed according to the ribbon-line stacking form, and when assembling, the assembling can be completed only by placing the corresponding materials in sequence, and the structure is a symmetrical structure, and the assembling and disassembling processes are simple; besides, the central conductor 105 adopts a double-Y-shaped structural design, so that impedance in the working process of the isolator can be matched conveniently, the frequency range can be adjusted, branches of the double-Y-shaped central conductor 105 are wider, the field intensity of an electric field generated by the edges of the branches is smaller, and the operation safety of the device is improved.

The second embodiment of the utility model is as follows: referring to fig. 1 to 9, on the basis of the first embodiment, the working environment of the coaxial waveguide isolator 100 is between 800W and 2000W, and in order to prevent the tip discharge at the corners of the branches of the center conductor 105, the corners of the entire center conductor 105 are rounded; meanwhile, an upper dielectric film 112 is arranged between the upper dielectric ring 104 and the central conductor 105, and a lower dielectric film 113 is arranged between the lower dielectric ring 106 and the central conductor 105, so that the problem of edge ignition in the isolator is prevented, and ferrite is prevented from being damaged; specifically, the dielectric film is a polytetrafluoroethylene dielectric film. Specifically, under the condition of 2000W power input, when a center conductor is added with a round angle, individual sharp corner points on the conductor are taken for electric field (E) distribution data analysis, under the condition of the round angle, the electric field (E) is obviously lower, breakdown is less likely to happen in the use process of the device, the performance is more stable and reliable, and details are shown in fig. 7 to 8.

The third embodiment of the utility model is as follows: referring to fig. 1 to 9, in the second embodiment, a coaxial waveguide isolator 100 further includes a waveguide load device 200, where the waveguide load device 200 includes a load assembly 210 and a coaxial connector assembly 220, and the coaxial connector assembly 220 connects the load assembly 210 and the center conductor 105, and where the coaxial connector assembly 220 includes an N-type female rf coaxial connector 221 and an N-type male rf coaxial connector 222 that are assembled and connected with each other, and the other end of the N-type female rf coaxial connector 221 is assembled and connected with the connector interface 214, and the other end of the N-type male rf coaxial connector 222 is assembled and connected with one branch of the center conductor 105; specifically, the N-type female rf coaxial connector 221 includes a connector flange 223, an insulating medium 224 and a PIN 225, the PIN 225 is disposed on an outer surface of the connector flange 223, the insulating medium 224 is disposed on an outer side of the PIN 225, the insulating medium 224 and the PIN 225 are inserted into the connector interface 214 to be conducted with the waveguide load device 211, and the connector flange 223 is assembled and connected with the connector interface 214. The load assembly 210 comprises a waveguide load 211 and a waveguide flange 212, the waveguide flange 212 is assembled and connected with an opening of the waveguide load 211, a plurality of groups of cooling fins 213 and a connector interface 214 are arranged on the waveguide load 211, and the connector interface 214 is assembled and connected with the other end of the coaxial connector assembly 220. In addition, an N-type male rf coaxial connector 222 is coupled to one of the branches of the center conductor 105 to provide communication between the waveguide loading device 200 and the center conductor 105.

That is, in the present embodiment, for matching the working environment, the waveguide load device 200 is provided on one branch of the center conductor 105, and the waveguide load device 200 includes a load integration 210 and a coaxial connector integration 220, wherein the coaxial connector integration 220 connects the waveguide load integration 210 and the center conductor 105; the load integration comprises a waveguide load 211 and a waveguide flange 212, the waveguide flange 212 seals the opening of the waveguide load 211, and a plurality of groups of cooling fins 213 are arranged on the waveguide load 211 to prevent the isolator from overheating in the working process and causing shutdown.

The fourth embodiment of the utility model is as follows: referring to fig. 1 to 9, on the basis of the third embodiment, a coaxial waveguide isolator 100 further includes an upper cover plate 114 and a lower cover plate 115, the upper cover plate 114 is located at a side of the upper cavity 101 away from the lower cavity 102, the lower cover plate 115 is located at a side of the lower cavity 102 away from the upper cavity 101, the upper cover plate 114 is assembled and connected with the upper cavity 101 by screws, the lower cover plate 115 is assembled and connected with the lower cavity 102 by screws, thereby fixing all components of the entire waveguide, and simultaneously, the outer surfaces of the upper cover plate 114 and the lower cover plate 115 are provided with a plurality of groups of cooling fins 213; specifically, the upper cover plate 114 and the lower cover plate 115 are respectively connected with the upper cavity 102 and the lower cavity 102 through screws with the specification of KM2X4, and specifically, the working data of the coaxial waveguide isolator provided by the utility model is shown in fig. 9 in detail under the operation environment of requiring power reaching 2000W.

In summary, the present utility model provides a coaxial waveguide isolator 100, which has the following advantages in the context of high-field design and input environment:

(2) The center conductor 105 adopts a double-Y-shaped design, chamfering is carried out at the corner of the double-Y-shaped center conductor 105, and a dielectric film is arranged between the ferrite and the center conductor 105, so that the ferrite and the center conductor 105 are effectively separated, the phenomena of breakdown or edge ignition in the ferrite and the center conductor 105 are prevented from occurring under the condition of clamping, and the running stability of the device is improved.

(3) The waveguide loading apparatus 200 is designed to increase the power capacity of the entire apparatus by the design of the waveguide loading and the heat sink 213.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.

Claims

1. A coaxial waveguide isolator, characterized by: the device comprises an upper cavity and a lower cavity which are oppositely arranged, wherein an upper ferrite, an upper medium ring, a central conductor, a lower medium ring and a lower ferrite are coaxially arranged between the upper cavity and the lower cavity in sequence;

2. A coaxial waveguide isolator as claimed in claim 1, wherein the corners of the double Y-shaped center conductor are rounded.

3. A coaxial waveguide isolator as claimed in claim 2, wherein an upper dielectric film is disposed between the upper dielectric ring and the center conductor, and a lower dielectric film is disposed between the lower dielectric ring and the center conductor.

4. A coaxial waveguide isolator as in claim 3, wherein the upper dielectric film and the lower dielectric film are polytetrafluoroethylene dielectric films.

5. The coaxial waveguide isolator of claim 1, further comprising a waveguide loading means comprising a loading assembly, a coaxial connector assembly, one end of the coaxial connector assembly being in assembled connection with one leg of the center conductor;

6. The coaxial waveguide isolator of claim 5, wherein the coaxial connector assembly comprises an N-type female rf coaxial connector and an N-type male rf coaxial connector that are fittingly connected to each other, the other end of the N-type female rf coaxial connector being fittingly connected to the connector interface, the other end of the N-type male rf coaxial connector being fittingly connected to one leg of the center conductor.

7. The coaxial waveguide isolator of claim 6, wherein the N-type female rf coaxial connector comprises a connector flange, an insulating medium and a PIN, the PIN is disposed on an outer surface of the connector flange, the insulating medium is disposed on an outer side of the PIN, and the connector flange is assembled with the connector interface.

8. The coaxial waveguide isolator of claim 1, further comprising an upper cover plate and a lower cover plate, wherein the upper cover plate is positioned on a side of the upper cavity away from the lower cavity, the lower cover plate is positioned on a side of the lower cavity away from the upper cavity, the upper cover plate is in assembled connection with the upper cavity, and the lower cover plate is in assembled connection with the lower cavity.

9. The coaxial waveguide isolator of claim 8, wherein the outer surfaces of the upper and lower cover plates are each provided with a plurality of sets of fins.

10. The coaxial waveguide isolator of claim 8, wherein the upper cover plate is assembled with the upper cavity by screws and the lower cover plate is assembled with the lower cavity by screws.