CN219371333U - High-power waveguide circulator - Google Patents

Abstract

The utility model discloses a high-power waveguide circulator, which comprises an upper cavity (1) and a lower cavity (2), wherein an upper permanent magnet (5) and an upper cover plate (6), and a lower permanent magnet (7) and a lower cover plate (8) are respectively embedded in a magnetic field cavity (4) of the upper cavity and the lower cavity; the lower end face of the upper cavity (1) and the upper end face of the lower cavity (2) are respectively provided with a matching step (9) and a matching groove (10), and a medium ring (11), a medium wafer (12), an upper ferrite (13) and a lower ferrite (14) are arranged in the matching groove (10); the flange surfaces of the upper cavity (1) and the lower cavity (2) are provided with sealing grooves (15), and the rectangular caliber (16) at the middle part of the sealing grooves is opposite to the Y-shaped waveguide cavity (3); and a group of heat dissipation teeth (17) are respectively arranged on the upper cavity (1) and the lower cavity (2). The utility model has the advantages that the non-gluing technology is adopted, the power and the stability of the device are improved, the heat dissipation area is increased, and the service performance of the circulator is improved.

Description

High-power waveguide circulator

Technical Field

The utility model relates to the technical field of waveguide circulators, in particular to a high-power waveguide circulator.

Background

The circulator is a three-port device with a single transmission characteristic, which controls the transmission of electromagnetic waves in a certain circulating direction. When a bias magnetic field is applied, gyromagnetic characteristics are generated, so that polarization rotation and electromagnetic wave energy absorption of electromagnetic waves propagating in the ferrite occur.

However, the phenomenon of falling and bubbles easily occurs in the existing circulator in the gluing process, so that the quality and stability are reduced, meanwhile, the circulator generates a large amount of heat during high-power operation, the equipment cannot normally work for a long time due to limited heat dissipation effect, and the frequency of the circulator is limited and cannot be further improved along with the increasing requirement of the market on indexes of the circulator.

Disclosure of Invention

The utility model aims to solve the problems that the existing circulator gluing process is easy to fall off, generates bubbles, has poor heat dissipation effect and poor usability, and provides a high-power waveguide circulator.

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

the high-power waveguide circulator comprises an upper cavity and a lower cavity which are matched with each other, wherein a Y-shaped waveguide cavity is formed in the middle of the upper cavity and the lower cavity after the upper cavity and the lower cavity are connected, cylindrical magnetic field cavities are formed in the upper end face of the upper cavity and the lower end face of the lower cavity, an upper permanent magnet and an upper cover plate are embedded in the magnetic field cavities of the upper cavity, the upper permanent magnet is packaged in the corresponding magnetic field cavities through the upper cover plate, a lower permanent magnet and a lower cover plate are embedded in the magnetic field cavities of the lower cavity, and the lower permanent magnet is packaged in the corresponding magnetic field cavities through the lower cover plate;

the lower end face of the upper cavity and the upper end face of the lower cavity are both provided with matching steps, the matching steps are provided with matching grooves, the matching grooves are communicated with the magnetic field cavity, medium rings are arranged in the matching grooves of the upper cavity and the lower cavity, a medium wafer is tightly embedded in the medium rings, two sides of the medium wafer are respectively provided with an upper ferrite and a lower ferrite, and the upper ferrite and the lower ferrite are also tightly embedded in the medium rings;

the flange surface of the upper cavity is provided with a semicircular upper notch, the flange surface of the lower cavity is provided with a semicircular lower notch, the upper notch and the lower notch are correspondingly matched to form a circular sealing groove, the middle part of the sealing groove is provided with a rectangular caliber, and the rectangular caliber is arranged opposite to the Y-shaped waveguide cavity;

and a group of heat dissipation teeth are further arranged on the upper cavity and the lower cavity respectively, so that the heat dissipation area of the product is increased when the product heats under the high-power working condition.

Further, the medium ring is a polytetrafluoroethylene ring.

Further, the dielectric wafer is a ceramic wafer.

Further, the diameter of the magnetic field cavity is larger than that of the matching groove, and the magnetic field cavity and the matching groove are positioned on the same axis.

Further, the upper cover plate, the upper permanent magnet, the upper ferrite, the medium ring, the medium disc, the lower ferrite, the lower permanent magnet and the lower cover plate are positioned on the same axis.

Further, the matching steps and the matching grooves are of round structures, and the matching steps are higher than the horizontal plane where the rectangular caliber is located.

Further, the upper cavity is connected with the lower cavity through the fastening screw, and a group of grooves are formed in the contact surface of the upper cavity and the lower cavity, so that the contact surface is reduced, leakage is prevented, and the upper structure and the lower structure are better grounded.

Further, the heat dissipation teeth are of L-shaped structures and are arranged on two adjacent surfaces of each cavity.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

(1) According to the utility model, the circular matching blocks are arranged on the upper cavity and the lower cavity, the circular grooves are arranged in the centers of the circular matching blocks, and then the medium rings embedded with the medium wafer and ferrite are arranged in the grooves of the upper cavity and the lower cavity, so that the risk of bonding by using glue can be avoided, and the bandwidth of a device can be widened;

(2) The corresponding upper end face and lower end face of the upper cavity and the lower cavity are provided with radiating teeth, so that the radiating area of the circulator is increased when the circulator works at high power to ensure that the circulator works normally;

(3) The flange surfaces of the upper cavity and the lower cavity are provided with sealing grooves, so that good air tightness is ensured during connection and use;

(4) The grooves are arranged on the contact surfaces of the upper cavity and the lower cavity, so that the contact surfaces are reduced, leakage is prevented, and the upper structure and the lower structure are better grounded;

(5) The ferrite used in the utility model is circular high-power ferrite, and a lithium ferrite material is adopted, so that the device has the characteristics of high power and good temperature stability;

(6) The split waveguide cavity is adopted, the upper cavity and the lower cavity are fixed through the screws, so that the split waveguide cavity is convenient to mount and dismount, and the insertion loss of a device can be effectively reduced.

Drawings

FIG. 1 is an exploded view of a high-power waveguide circulator structure of the utility model;

fig. 2 is a diagram of the overall structure of the high-power waveguide circulator of the utility model;

FIG. 3 is a schematic diagram of the dielectric ring and ferrite assembly of the present utility model.

Detailed Description

Example 1

In order that the utility model may be more clearly understood, a high power waveguide circulator of the utility model will be further described with reference to the accompanying drawings, the specific embodiments described herein being for purposes of illustration only and not for limitation.

Referring to fig. 1 and 2, the high-power waveguide circulator of the utility model comprises a waveguide cavity, wherein the waveguide cavity comprises an upper cavity 1 and a lower cavity 2 which are arranged up and down, circular matching steps 9 are respectively arranged on the end surfaces of the upper cavity 1 and the lower cavity 2, circular matching grooves 10 are respectively arranged on the matching steps 9, the matching steps 9 on the upper cavity 1 and the lower cavity 2 are positioned at the central part of the Y-shaped waveguide cavity 3, and the matching grooves 10 are positioned at the central part of the matching steps 9.

Referring to fig. 1 and 3, a dielectric disc 12 is placed at the center of a dielectric ring 11, and an upper ferrite 13 and a lower ferrite 14 are tightly embedded in the dielectric ring 11, and are respectively disposed at both sides of the dielectric disc 12.

Referring to fig. 1, the upper end surface of the upper cavity 1 and the lower end surface of the lower cavity 2 are both provided with cylindrical magnetic field cavities 4, an upper permanent magnet 5 and an upper cover plate 6 are embedded in the magnetic field cavities 4 of the upper cavity 1, the upper permanent magnet 5 is encapsulated in the corresponding magnetic field cavity 4 by the upper cover plate 6 in the upper cavity 1, a lower permanent magnet 7 and a lower cover plate 8 are embedded in the magnetic field cavity of the lower cavity 2, and the lower permanent magnet 7 is encapsulated in the corresponding magnetic field cavity by the lower cover plate 8 in the lower cavity 2;

in the utility model, the upper ferrite 13 and the lower ferrite 14 are magnetized under the action of the magnetic fields of the upper permanent magnet 5 and the lower permanent magnet 7, so that the magnetizing magnetic field intensity of the upper ferrite and the lower ferrite is ensured, and meanwhile, various electric performance indexes can be effectively ensured.

The ferrite used in the embodiment is circular ferrite, and high-power materials are adopted, so that the device has the characteristics of high power, high frequency, wide frequency and good temperature stability.

Referring to fig. 1 and 2, the upper cavity 1 and the lower cavity 2 are fixed by fastening screws 18, and a split waveguide cavity is adopted, so that the device is convenient to install and disassemble by screw fixation, and the insertion loss of the device can be effectively reduced.

Referring to fig. 1 and 2, sealing grooves 15 are formed in flange surfaces of the upper cavity 1 and the lower cavity 2, so that good air tightness is ensured during connection and use.

The working principle of the waveguide circulator of the utility model is as follows:

the Y-shaped junction structure adopted by the waveguide cavity, namely a three-terminal waveguide Y-junction circulator, can be regarded as three devices with the same waveguide and the waveguide cavity coupled through larger coupling holes. The TE10 wave input by the first port enters the waveguide cavity to excite TM110 standing waves of the upper magnetic field cavity and the lower magnetic field cavity, if no external bias field exists, the TM110 standing waves are not magnetized, equal amount of energy can be coupled to the second port and the load port, if the pair of ferrites are proper in size, the external bias field is proper in direction and size, the field distribution in the cavity can rotate 30 degrees around the central axis due to gyromagnetic effect, two transverse magnetic closed curves of the standing waves in the cavity are in constant amplitude inversion at the load port, at the moment, the microwave electromagnetic field is only coupled to the second port, and similarly, the electromagnetic wave input by the second port is only coupled to the third port, and the electromagnetic wave input by the third port is only coupled to the first port, so that the annular function is realized.

The waveguide circulator comprises an upper cavity, a lower cavity, two gyromagnetic ferrites, two permanent magnets, a medium ring of high-temperature resistant material and a medium wafer, wherein the ferrites are wrapped by the medium ring, and the two ferrites are separated by the medium wafer, so that the waveguide circulator is free from gluing, the phenomena of falling, bubbles and the like in the gluing process are avoided, and the purpose of being more stable is achieved by adopting the design of the non-gluing process; the medium ring and the medium disc are made of high-temperature resistant materials, and the ferrite is made of round and high-power materials, so that the high-power characteristic is achieved; the upper end face and the lower end face of the upper cavity and the lower cavity are provided with heat dissipation teeth, so that the heat dissipation area of the product is increased when the product heats under the high-power working condition.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims (8)

1. The utility model provides a high-power waveguide circulator, includes cavity (1) and lower cavity (2) on mutually supporting, and wherein forms Y waveguide cavity (3), its characterized in that after the two link to each other:

the upper end face of the upper cavity (1) and the lower end face of the lower cavity (2) are both provided with cylindrical magnetic field cavities (4), an upper permanent magnet (5) and an upper cover plate (6) are embedded in the magnetic field cavities of the upper cavity (1), the upper permanent magnet (5) is packaged in the corresponding magnetic field cavity through the upper cover plate (6), a lower permanent magnet (7) and a lower cover plate (8) are embedded in the magnetic field cavity of the lower cavity (2), and the lower permanent magnet (7) is packaged in the corresponding magnetic field cavity through the lower cover plate (8) by the lower cavity (2);

the lower end face of the upper cavity (1) and the upper end face of the lower cavity (2) are both provided with matching steps (9), the matching steps (9) are provided with matching grooves (10), the matching grooves (10) are communicated with the magnetic field cavity (4), medium rings (11) are arranged in the matching grooves (10) of the upper cavity and the lower cavity, a medium wafer (12) is tightly embedded in the medium rings (11), two sides of the medium wafer (12) are respectively provided with an upper ferrite (13) and a lower ferrite (14), and the upper ferrite and the lower ferrite are also tightly embedded in the medium rings (11);

a semicircular upper notch (1 a) is formed in the flange surface of the upper cavity (1), a semicircular lower notch (2 a) is formed in the flange surface of the lower cavity (2), the upper notch (1 a) and the lower notch (2 a) are correspondingly matched to form a circular sealing groove (15), a rectangular caliber (16) is arranged in the middle of the circular sealing groove, and the rectangular caliber (16) is opposite to the Y-shaped waveguide cavity (3);

and a group of heat dissipation teeth (17) are respectively arranged on the upper cavity (1) and the lower cavity (2).

2. The high power waveguide circulator of claim 1, wherein:

the medium ring (11) is a polytetrafluoroethylene ring.

3. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the dielectric wafer (12) is a ceramic wafer.

4. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the diameter of the magnetic field cavity (4) is larger than that of the matching groove (10), and the magnetic field cavity (4) and the matching groove (10) are positioned on the same axis.

5. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the upper cover plate (6), the upper permanent magnet (5), the upper ferrite (13), the dielectric ring (11), the dielectric disc (12), the lower ferrite (14), the lower permanent magnet (7) and the lower cover plate (8) are positioned on the same axis.

6. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the matching steps (9) and the matching grooves (10) are of round structures, and the matching steps (9) are higher than the horizontal plane where the rectangular caliber (16) is located.

7. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the upper cavity (1) is connected with the lower cavity (2) through a fastening screw (18), and a group of grooves (19) are formed in the contact surface of the upper cavity and the lower cavity.

8. The high-power waveguide circulator according to claim 1 or 2, characterized in that:

the heat dissipation teeth (17) are of L-shaped structures and are arranged on two adjacent surfaces of each cavity.