Small-size circulator

Abstract

The utility model discloses a small-size circulator, which comprises a shell, a cover plate is connected above the shell, an upper uniform magnetic sheet, a temperature patch, an upper magnet, a lower uniform magnetic sheet, an upper rotating magnetic sheet, a central conductor, a lower rotating magnetic sheet, a grounding sheet and a lower magnet are sequentially arranged in the shell from top to bottom, a plurality of terminals are connected onto the central conductor, and the terminals are connected onto the upper side of the shell. A lower cavity is formed in the inner bottom of the shell, an upper cavity is formed above the lower cavity, a step is arranged between the lower cavity and the upper cavity, the inner diameter of the upper cavity is larger than that of the lower cavity, and the lower magnet is located in the lower cavity. According to the utility model, the upper cavity is arranged above the lower cavity, and the area of the inner cavity is increased on the premise of not changing the boundary dimension of the circulator, so that the diameters of the rotary magnetic sheet and the central conductor can be increased, the contact area of the rotary magnetic sheet and the central conductor is further increased, and the purposes of ensuring small size and small size can be achieved. And the requirements of bandwidth and stability can be met.

Description

Technical Field

[0001] This utility model belongs to the field of circulator technology, and specifically relates to a small-sized circulator. Background Technology

[0002] With the rapid development of the information age, high-frequency communication equipment such as communication base stations has become a necessity. Furthermore, with the application of 5G technology, there are higher requirements for the size of hardware equipment. Therefore, the design performance requirements for components such as circulators and isolators used in these devices are becoming increasingly stringent.

[0003] Chinese Patent Application No. 202023235452.8 discloses an ultra-miniaturized microwave vortex circulator, comprising a housing and, installed inside the housing, sequentially arranged from top to bottom: a compensation plate, a first magnet, a first iron plate, a first ceramic ring ferrite, a central conductor, a second ceramic ring ferrite, a second iron plate, a second magnet, and a dielectric insert; both the first and second ceramic ring ferrites are BiCaVIG ferrites with a dielectric constant greater than or equal to 30. By introducing ferrites with high dielectric constants, since the conductor size is inversely proportional to the square root of the ferrite dielectric constant, the bandwidth of the circulator is not reduced after the size of the microwave vortex circulator is decreased.

[0004] However, using high dielectric constant ceramic rings requires improved assembly precision to ensure the consistency of product waveforms.

[0005] Therefore, there is an urgent need for a circulator housing that can minimize the size of the inner diameter while still meeting the requirements for bandwidth and stability. Utility Model Content

[0006] The purpose of this invention is to provide a small-sized circulator to solve the problems mentioned in the background section. The small-sized circulator provided by this invention has the characteristics of ensuring both small size and meeting bandwidth and stability requirements.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a small-sized circulator, comprising a housing, a cover plate connected to the top of the housing, and inside the housing, from top to bottom, an upper uniform magnetic sheet, a temperature compensation sheet, an upper magnet, a lower uniform magnetic sheet, an upper rotating magnetic sheet, a central conductor, a lower rotating magnetic sheet, a grounding sheet, and a lower magnet, wherein a plurality of terminals are connected to the central conductor, a lower cavity is provided at the bottom of the housing, an upper cavity is provided above the lower cavity, a step is provided between the lower cavity and the upper cavity, and the inner diameter of the upper cavity is larger than that of the lower cavity, and the lower magnet is located in the lower cavity.

[0008] To achieve a limiting connection between the cover plate and the housing, the upper end of the housing is provided with three bent feet arranged in a circular array, and the cover plate is provided with slots corresponding to the bent feet.

[0009] To facilitate the installation of terminals, the lower end of the housing circumference is further provided with three terminal connecting blocks arranged in a ring array. The terminal connecting blocks are provided with terminal holes, the lower end of the terminal is embedded in the terminal hole, and the upper end of the terminal is connected to the center conductor.

[0010] To provide clearance space for the connection between the center conductor and the terminal, the housing is further provided with three clearance slots corresponding to the terminal connection blocks.

[0011] In order to allow the lower magnet to be inserted into the lower cavity, the inner diameter of the lower cavity is larger than the diameter of the lower magnet, and the inner diameter of the lower cavity is smaller than the diameter of the grounding plate.

[0012] To ensure there is no gap between the lower magnet and the grounding plate, the height of the lower cavity is further less than the thickness of the lower magnet.

[0013] To provide clearance for the lower end of the terminal and prevent arcing, the bottom of the housing is further provided with an arc groove located below the terminal connecting block.

[0014] Furthermore, the lower uniform magnetic sheet is a hexagonal uniform magnetic sheet.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model provides an upper cavity above the lower cavity, which increases the area of ​​the inner cavity without changing the outer dimensions of the circulator. This increases the diameter of the rotating magnetic plate and the central conductor, further increasing the contact area between the rotating magnetic plate and the central conductor, thus achieving both small size and meeting the requirements of bandwidth and stability.

[0017] 2. The bottom of the housing of this utility model is provided with an arc groove located below the terminal connecting block, which provides clearance space for the lower end of the terminal, thereby preventing arcing of the terminal.

[0018] 3. The height of the lower cavity of this utility model is less than the thickness of the lower magnet, ensuring that there is no gap between the lower magnet and the grounding plate, and indirectly ensuring that there are no gaps between the grounding plate, the lower rotating magnetic plate, the central conductor, the upper rotating magnetic plate, the lower uniform magnetic plate, the upper magnet, the temperature compensation plate, and the upper uniform magnetic plate. Attached Figure Description

[0019] Figure 1 This is an exploded view of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the shell of this utility model.

[0021] Figure 3 This is a schematic diagram of the main structure of the shell of this utility model.

[0022] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0023] Figure 5 This is a schematic diagram of the bottom of the casing of this utility model.

[0024] Figure 6 This is a cross-sectional view of the lower magnet and the housing after assembly.

[0025] In the diagram: 1. Cover plate; 2. Upper uniform magnetic sheet; 3. Center conductor; 4. Lower rotating magnetic sheet; 5. Grounding sheet; 6. Lower magnet; 7. Housing; 71. Lower cavity; 72. Upper cavity; 73. Step; 74. Bending foot; 75. Terminal connecting block; 76. Terminal hole; 77. Arc groove; 78. Clearance groove; 8. Upper rotating magnetic sheet; 9. Lower uniform magnetic sheet; 10. Upper magnet; 11. Temperature compensation sheet; 12. Terminal. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figures 1-6 This utility model provides the following technical solution: A small-sized ring device includes a shell 7, which is an integrally formed structure. A cover plate 1 is connected to the top of the shell 7. The interior of the shell 7 is provided with an upper uniform magnetic sheet 2, a temperature compensation sheet 11, an upper magnet 10, a lower uniform magnetic sheet 9, an upper rotating magnetic sheet 8, a central conductor 3, a lower rotating magnetic sheet 4, a grounding sheet 5, and a lower magnet 6 from top to bottom. Several terminals 12 are connected to the central conductor 3. A lower cavity 71 is provided at the bottom of the shell 7. An upper cavity 72 is provided above the lower cavity 71. A step 73 is provided between the lower cavity 71 and the upper cavity 72. The inner diameter of the upper cavity 72 is larger than that of the lower cavity 71. The lower magnet 6 is located inside the lower cavity 71. The inner diameter of the upper cavity 72 is 1 mm smaller than the outer diameter of the shell 7. The inner diameter of the lower cavity 71 is 1 mm smaller than the inner diameter of the upper cavity 72. After setting the upper cavity 72, the wall thickness of the shell 7 is 0.5 mm. Experiments have shown that the shell 7 meets the required strength.

[0029] By adopting the above technical solution, the present invention provides an upper cavity 72 above the lower cavity 71, which increases the area of ​​the inner cavity without changing the outer dimensions of the circulator, thereby increasing the diameter of the rotating magnetic plate and the central conductor 3, and further increasing the contact area between the rotating magnetic plate and the central conductor 3, thus achieving both small size and meeting the requirements of bandwidth and stability.

[0030] Specifically, the upper end of the housing 7 is provided with three bending feet 74 arranged in a ring. The cover plate 1 is provided with slots corresponding to the bending feet 74. During assembly, the slots of the cover plate 1 are put into the bending feet 74, and then the bending feet 74 are bent.

[0031] By adopting the above technical solution, the limiting connection between the cover plate 1 and the shell 7 is achieved.

[0032] Specifically, the lower end of the circumference of the housing 7 is provided with three terminal connecting blocks 75 arranged in a ring array. The terminal connecting blocks 75 are provided with terminal holes 76. The lower end of the terminal 12 is embedded in the terminal hole 76, and the upper end of the terminal 12 is connected to the center conductor 3.

[0033] By adopting the above technical solution, the installation of terminal 12 is achieved.

[0034] Specifically, the housing 7 is provided with three clearance grooves 78 corresponding to the terminal connecting blocks 75.

[0035] By adopting the above technical solution, clearance space is provided for the connection end between the center conductor 3 and the terminal 12.

[0036] Specifically, the inner diameter of the lower cavity 71 is slightly larger than the diameter of the lower magnet 6, and the inner diameter of the lower cavity 71 is smaller than the diameter of the grounding piece 5.

[0037] By adopting the above technical solution, the lower magnet 6 can be inserted into the lower cavity 71.

[0038] Example 2

[0039] The difference between this embodiment and embodiment 1 is that, specifically, the bottom of the housing 7 is provided with an arc groove 77 located below the terminal connecting block 75.

[0040] By adopting the above technical solution, clearance space is provided for the lower end of terminal 12, thereby preventing arcing of terminal 12.

[0041] Example 3

[0042] The difference between this embodiment and embodiment 1 is that, specifically, the height of the lower cavity 71 is less than the thickness of the lower magnet 6, that is, after the lower magnet 6 is placed in the lower cavity 71, the upper surface of the lower magnet 6 is higher than the platform of the step 73.

[0043] By adopting the above technical solution, it is ensured that there is no gap between the lower magnet 6 and the grounding plate 5, which indirectly ensures that there are no gaps between the grounding plate 5, the lower rotating magnetic plate 4, the central conductor 3, the upper rotating magnetic plate 8, the lower uniform magnetic plate 9, the upper magnet 10, the temperature compensation plate 11, and the upper uniform magnetic plate 2.

[0044] Example 4

[0045] The difference between this embodiment and embodiment 1 is that, specifically, the lower uniform magnetic sheet 9 is a hexagonal uniform magnetic sheet.

[0046] By adopting the above technical solution, the hexagonal uniform magnetic sheet 9 can effectively increase the contact area with the cavity. When the individual characteristics of the product are poor, the hexagon can be welded to the shell 7, thereby improving the individual poor indicators.

[0047] In summary, this invention provides an upper cavity 72 above the lower cavity 71, increasing the area of ​​the inner cavity without changing the external dimensions of the circulator. This increases the diameter of the rotating magnetic plate and the central conductor 3, further increasing the contact area between them. This achieves both a small size and meets the requirements of bandwidth and stability. The bottom of the housing 7 has an arc groove 77 located below the terminal connecting block 75, providing clearance for the lower end of the terminal 12 and preventing arcing. The height of the lower cavity 71 is less than the thickness of the lower magnet 6, ensuring no gap exists between the lower magnet 6 and the grounding plate 5. This indirectly ensures that there are no gaps between the grounding plate 5, the lower rotating magnetic plate 4, the central conductor 3, the upper rotating magnetic plate 8, the lower uniform magnetic plate 9, the upper magnet 10, the temperature compensation plate 11, and the upper uniform magnetic plate 2.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small size circulator, characterized by: The shell is provided with three bending feet in annular array at the upper end, and the cover is provided with corresponding insertion slots.

2. A small size circulator according to claim 1, characterized in that: The lower end of the shell circumference is provided with three terminal connecting blocks in annular array, and the terminal connecting blocks are provided with terminal holes, the lower end of the terminal is embedded in the terminal hole, and the upper end of the terminal is connected with the center conductor.

3. A small size circulator according to claim 1, characterized in that: The shell is provided with three avoiding slots corresponding to the terminal connecting blocks.

4. A small size circulator according to claim 3, characterized in that: The inner diameter of the lower cavity is greater than the diameter of the lower magnet, and the inner diameter of the lower cavity is less than the diameter of the grounding sheet.

5. A small size circulator according to claim 1, characterized in that: The height of the lower cavity is less than the thickness of the lower magnet.

6. A small size circulator according to claim 1, characterized in that: The bottom of the shell is provided with a circular arc groove below the terminal connecting block.

7. A small size circulator according to claim 1, characterized in that: The lower uniform magnetic sheet is a hexagonal uniform magnetic sheet.

8. A small size circulator according to claim 1, characterized in that: ​

Images