CN216312020U

CN216312020U - Isolator and antenna

Info

Publication number: CN216312020U
Application number: CN202122678885.9U
Authority: CN
Inventors: 钱仁杰
Original assignee: Wuxi Gaoyusheng New Material Technology Co ltd
Current assignee: Wuxi Gaoyusheng New Material Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-15
Anticipated expiration: 2031-11-03

Abstract

The utility model provides an isolator and an antenna, and relates to the technical field of communication. The uniform magnetic sheet in the isolator provided by the utility model is provided with the plurality of uniformly arranged through grooves, magnetic steel can directly supply magnetism to the first ferrite component, the magnetic field of the part has higher magnetic field intensity, samarium-cobalt magnetic steel with stronger magnetic field and higher cost is not required to be used, the improvement of the overall cost is avoided, and the uniformity of the magnetic field can be ensured.

Description

Isolator and antenna

Technical Field

The utility model relates to the technical field of communication, in particular to an isolator and an antenna.

Background

The isolator is a radio frequency device which enables incident waves entering any port of the isolator to generate gyromagnetic force through a bias magnetic field and propagate to the next port according to a certain direction (clockwise or anticlockwise). When the signal reversely propagates in the device, the signal is absorbed by a load connected to a third port of the device except the incident port and the reflection port, so that the signal cannot be transmitted from the incident port to influence the whole signal transmission process. The isolator enables the ferrite to have gyromagnetic performance through a static magnetic field provided by the internal magnetic steel, and signals can circulate in the ferrite according to a certain direction through the central conductor; the magnetic field generated by a common cylindrical magnet in the normal direction has poor uniformity, and when ferrite is in the magnetic field with poor uniformity, the generated ring performance is also poor, and the index of the isolator can be greatly influenced; in order to solve the problem of poor uniformity of the magnetic field, a uniform magnetic sheet is generally arranged between a magnet and a ferrite, the uniform magnetic sheet is made of iron, and a coating is arranged on the surface of the uniform magnetic sheet; the magnetic field of the magnetic steel can be weakened after passing through the uniform magnetic sheets, but the uniformity is obviously improved, and the gyromagnetic performance of the ferrite is improved.

The uniform magnetic sheets used by the current isolator are generally circular iron sheets with the area larger than that of magnetic steel and ferrite; during assembly, the assembly position of the uniform magnetic sheet is positioned between the magnetic steel and the ferrite, and the magnetic steel is generally made of C8B. The general isolator uses two pieces of magnetic steel for magnetism, which are respectively positioned at two sides of two pieces of ferrite, and two pieces of even magnetic sheets are needed at the moment; if a single piece of magnetic steel is used for supplying magnetism, a piece of even magnetic sheet is needed; the circular even magnetic sheet with the area larger than that of the magnetic steel and the ferrite can provide relatively even magnetic field distribution. However, the use of such circular shimming pieces has drawbacks in certain situations: for some isolators with higher magnetic field requirements, the C8B magnetic steel with higher cost performance cannot meet the magnetic field requirements of the device under the above conditions, and the samarium cobalt magnetic steel with stronger magnetic field can bring several times higher cost. In this case, the use of a C8B magnet with a circular shim does not provide the desired results.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an isolator and an antenna, which can improve the magnetic field intensity and reduce the cost.

In order to achieve the purpose, the utility model provides the following technical scheme:

in a first aspect, the utility model provides an isolator which comprises a special-shaped uniform magnetic sheet and an isolator body, wherein the isolator body comprises magnetic steel and a first ferrite component, the special-shaped uniform magnetic sheet is arranged between the magnetic steel and the first ferrite component, the special-shaped uniform magnetic sheet is provided with a plurality of through grooves, and the through grooves are uniformly distributed around the axis of the special-shaped uniform magnetic sheet.

Further, the through groove is formed from the outer edge of the special-shaped uniform magnetic sheet to the center of the special-shaped uniform magnetic sheet.

Further, the cross section of the through groove is arched, elongated or triangular.

Further, when the cross section of the through groove is in the shape of a long strip, the central line of the long strip extends along the radial direction of the special-shaped uniform magnetic sheet.

Furthermore, the end part of the through groove, which is far away from the special-shaped uniform magnetic sheet, is spaced from the outer edge of the special-shaped uniform magnetic sheet.

Further, the isolator body still includes checkpost, compensation piece and the apron that sets gradually outside sending by interior, the checkpost lid is located the top of magnet steel.

Further, the isolator body still includes load piece, central conductor, second ferrite subassembly and shell, the central conductor, the second ferrite subassembly with the shell and by interior outer setting in proper order that causes, the load piece install in the shell and with a pin of central conductor is connected, the apron lid is located the top of shell.

Further, the first ferrite assembly and the second ferrite assembly each comprise a ferrite sheet and a polytetrafluoroethylene ring wrapped at the edge of the ferrite sheet.

In a second aspect, the present invention further provides an antenna, including the isolator in the above aspect.

The isolator provided by the utility model can produce the following beneficial effects:

compared with the prior art, the uniform magnetic sheet in the isolator provided by the first aspect of the utility model gets rid of the traditional circular uniform magnetic sheet, the uniform magnetic sheet is provided with the plurality of through grooves, the magnetic steel can directly supply magnetism to the first ferrite component, the part of magnetic field has higher magnetic field intensity compared with the magnetic field using the traditional uniform magnetic sheet for supplying magnetism, and meanwhile, the plurality of through grooves are uniformly distributed on the special-shaped uniform magnetic sheet around the axis of the special-shaped uniform magnetic sheet, so that the uniformity degree of the whole magnetism supply cannot be influenced. Use even magnetic sheet of dysmorphism to replace and can continue to use C8B material magnet after the even magnetic sheet of tradition, need not to use the samarium cobalt magnet steel that the magnetic field is stronger, the cost is higher, avoided the improvement of overall cost.

The antenna provided by the second aspect of the present invention has the isolator provided by the first aspect of the present invention, thereby having all the advantages of the isolator provided by the first aspect of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of an isolator according to an embodiment of the present invention;

FIG. 2 is an exploded view of another isolator according to one embodiment of the present invention;

FIG. 3 is an index value of any three points in the magnetic field of the isolator provided by the embodiment of the utility model at different frequencies;

fig. 4 is an index value of the magnetic field of the conventional isolator corresponding to three points at different frequencies.

Icon: 1-special-shaped uniform magnetic sheets; 11-a through slot; 2-magnetic steel; 3-a first ferrite component; 4-a clip; 5-a compensation sheet; 6-cover plate; 7-a load sheet; 8-a center conductor; 9-a second ferrite component; 10-shell.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The embodiment of the first aspect of the utility model provides an isolator, as shown in fig. 1 and fig. 2, comprising a special-shaped uniform magnetic sheet 1 and an isolator body, wherein the isolator body comprises a magnetic steel 2 and a first ferrite component 3, the special-shaped uniform magnetic sheet 1 is arranged between the magnetic steel 2 and the first ferrite component 3, the special-shaped uniform magnetic sheet 1 is provided with a plurality of through grooves 11, and the plurality of through grooves 11 are uniformly distributed around the axis of the special-shaped uniform magnetic sheet 1.

The even magnetic sheet of dysmorphism has a plurality of logical grooves 11 in the isolator that this embodiment provided, magnet steel 2's magnetic field sees through each and leads to groove 11 and can have higher magnetic field intensity when conducting to first ferrite subassembly 3, simultaneously a plurality of logical grooves 11 around the even magnetic sheet 1's of dysmorphism axis evenly distributed on the even magnetic sheet 1 of dysmorphism, it is very little to magnet steel 2 through the even degree influence in magnetic field that the even magnetic sheet 1 of dysmorphism supplied magnetism, can guarantee the degree of consistency in magnetic field.

The first ferrite assembly 3 comprises a ferrite sheet and a polytetrafluoroethylene ring coated on the edge of the ferrite sheet; the magnetic steel 2 is a magnet with silver-plated surface.

The irregular magnetic leveling sheet 1 is specifically explained below:

the base material of the irregular magnetic homogenizing sheet 1 is iron, and the material of the coating comprises but is not limited to silver.

According to the distribution of the through slots 11, the following two embodiments can be divided:

example one

In the first embodiment, as shown in fig. 1 and 2, the through groove 11 is formed from the outer edge of the irregular magnetic homogenizing sheet 1 to the center of the irregular magnetic homogenizing sheet 1, so that the through groove 11 can be more conveniently processed.

The number of the through grooves 11 can be two, three, four, five, six, etc.

In the first embodiment, as shown in fig. 1, the cross section of the through groove 11 may be a long strip, and the number of the through grooves 11 is four. As shown in fig. 2, the cross section of the through grooves 11 is arched, and the number of the through grooves 11 is six. The cross section of the through groove can also be triangular and the like.

In the first embodiment, the cross section of the through groove 11 is preferably in an axisymmetric structure, and the symmetry axis of the through groove passes through the center of the irregular magnetic homogenizing sheet 1.

Taking fig. 1 as an example for specific explanation, the cross section of the through groove 11 is a strip shape, and the central line of the strip shape extends along the radial direction of the special-shaped magnet homogenizing sheet 1. The through groove 11 is formed by enclosing a first plane, a first arc surface and a second plane which are connected in sequence, the first plane and the second plane are arranged in parallel relatively, so that a long edge of the through groove 11 is formed, and the axis corresponding to the arc surface coincides with the axis of the special-shaped uniform magnetic sheet 1.

Taking fig. 2 as an example for specific explanation, the cross section of the through groove 11 is arched, and the arched central line extends along the radial direction of the irregular magnetic homogenizing sheet 1. The through groove 11 is formed by enclosing a third plane, a second arc surface and a fourth plane which are connected in sequence, the third plane and the fourth plane are arranged in parallel relatively, and the second arc surface is a semi-arc surface.

Example two

In the second embodiment, the end of the through groove 11 far away from the irregular magnet homogenizing sheet 1 is spaced from the outer edge of the irregular magnet homogenizing sheet 1. During machining, the through groove 11 needs to be machined through a drilling device.

The number of the through grooves 11 can be two, three, four, five, six, etc.

In the second embodiment, the cross section of the through slot 11 may be an arch, a long bar, a triangle, or the like.

In the second embodiment, the cross section of the through groove 11 is preferably in an axisymmetric structure, and the symmetry axis of the through groove passes through the center of the irregular magnetic homogenizing sheet 1.

When the cross section of the through groove 11 is in a strip shape, the central line of the strip shape extends along the radial direction of the special-shaped magnet homogenizing sheet 1; when the cross section of the through groove 11 is arched, the arched central line extends along the radial direction of the irregular magnetic homogenizing sheet 1.

The following specifically explains the structure of the separator body:

in some embodiments, as shown in fig. 1 and fig. 2, the isolator body further includes a clip 4, a compensation plate 5 and a cover plate 6, which are sequentially arranged from inside to outside, and the clip 4 covers the magnetic steel 2.

The clips 4 are made of iron, namely the clips 4 are iron clips 4; the compensating plate 5 is made of iron-nickel alloy; the base material of the cover plate 6 is copper, and the surface is plated with silver.

In some embodiments, as shown in fig. 1 and 2, the isolator body further comprises a load sheet 7, a central conductor 8, a second ferrite assembly 9 and a shell 10, wherein the central conductor 8, the second ferrite assembly 9 and the shell 10 are arranged in sequence from inside to outside, the load sheet 7 is mounted on the shell 10 and connected with one pin of the central conductor 8, and the cover plate 6 is covered on the top of the shell 10.

The base material of the central conductor 8 includes but is not limited to beryllium copper alloy, and the plating material includes but is not limited to silver; the second ferrite component 9 comprises ferrite and a polytetrafluoroethylene ring coated on the edge of the ferrite; the housing 10 has a receiving cavity, the base material of the housing 10 includes but is not limited to stainless steel, and the plating material includes but is not limited to nickel, silver, etc.

During assembly, the second ferrite component 9, the central conductor 8, the first ferrite component 3, the special-shaped magnetic homogenizing sheet 1, the magnetic steel 2, the clamp 4 and the compensating sheet 5 are sequentially placed in the shell 10; after the structures are assembled according to the process operation requirements of the devices, the cover plate 6 is placed at the top of the shell 10 and is screwed into the shell 10 through threads between the cover plate and the shell 10, and the cover plate is screwed by using a torque wrench with proper torque, so that the structures in the isolator are in a state of close contact; after the cover plate 6 is assembled, a load sheet 7 with a proper amount of soldering paste adhered to the back surface is placed at the welding load position of the shell 10 (the amount of the soldering paste is based on that the melted solder paste can completely cover the back surface of the load sheet but does not overflow from the back surface of the load sheet to form spherical soldering particles), and a metal layer on the upper surface of the load sheet 7 is connected with a central conductor pin extending out of a third port of the isolator; placing the isolator on a heating platform at 230 ℃ and heating to 230 ℃, and completing welding at the joint of a solder wire light point conductor pin and a solder joint of a load sheet 7; and naturally cooling the device to normal temperature, and finishing the assembly process.

Fig. 3 shows the index values of any three points in the magnetic field of the isolator provided in the above embodiment at different frequencies, and it can be seen from the graph that the absolute value of the index is 29.145dB at the 960MHZ point, i.e., the 3 rd point in fig. 3. Fig. 4 is an index value of a magnetic field of the prior art corresponding to three points at different frequencies, and it can be seen from the figure that at the point 960MHZ, i.e., the 3 rd point in fig. 4, the absolute value of the index is 21.682dB, and since 29.145dB is greater than 21.682dB, it can be seen that the isolator provided by the above embodiment has a better index, and when the magnetic field of the device is insufficient, the area of the shim can be changed to change the magnetic field without changing the thickness of the shim.

The antenna provided by the second aspect of the present invention has the isolator provided by the embodiment of the first aspect of the present invention, thereby having all the advantages of the isolator provided by the embodiment of the first aspect of the present invention.

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 the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an isolator, its characterized in that, includes even magnetic sheet (1) of dysmorphism and isolator body, the isolator body includes magnet steel (2) and first ferrite subassembly (3), even magnetic sheet (1) of dysmorphism install in magnet steel (2) with between first ferrite subassembly (3), even magnetic sheet (1) of dysmorphism has a plurality of logical grooves (11), and is a plurality of lead to groove (11) and center on the axis evenly distributed of the even magnetic sheet (1) of dysmorphism.

2. An isolator as claimed in claim 1, wherein said through slot (11) opens from the outer edge of said shaped shim (1) to the center of said shaped shim (1).

3. An insulator according to claim 2, wherein the through slot (11) is arcuate, oblong or triangular in cross-section.

4. A spacer as claimed in claim 3, characterized in that when the cross section of the through slot (11) is the elongated shape, the elongated center line extends in the radial direction of the shaped shim (1).

5. An isolator as claimed in claim 1, characterized in that the end of the through slot (11) remote from the shaped shim (1) is spaced from the outer edge of the shaped shim (1).

6. An insulator according to claim 5, wherein the through slot (11) is arched, elongated or triangular in cross-section.

7. The isolator according to claim 6, characterized in that the isolator body further comprises a clip (4), a compensation sheet (5) and a cover plate (6) which are sequentially arranged from inside to outside, wherein the clip (4) is covered on the magnetic steel (2).

8. The isolator according to claim 7, characterized in that the isolator body further comprises a load sheet (7), a central conductor (8), a second ferrite component (9) and a housing (10), the central conductor (8), the second ferrite component (9) and the housing (10) are arranged in sequence from inside to outside, the load sheet (7) is mounted on the housing (10) and connected with one pin of the central conductor (8), and the cover plate (6) is covered on the top of the housing (10).

9. An isolator as claimed in claim 8, wherein the first ferrite assembly (3) and the second ferrite assembly (9) each comprise a ferrite sheet and a teflon ring wrapped around the edge of the ferrite sheet.

10. An antenna comprising an isolator as claimed in any one of claims 1 to 9.