CN216902495U

CN216902495U - Novel radio frequency transformer

Info

Publication number: CN216902495U
Application number: CN202220375241.4U
Authority: CN
Inventors: 姚林杰; 蒋伟; 杨金超; 王耀斌
Original assignee: Zhuzhou Hongda Electronics Corp ltd
Current assignee: Zhuzhou Hongda Electronics Corp ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-07-05
Anticipated expiration: 2032-02-23

Abstract

The utility model provides a novel radio frequency transformer, which mainly solves the technical problems of miniaturization design, surface-mounted structure and high density of products, realizes the miniaturization and surface-mounted installation design of the products, saves space and improves the installation efficiency of the products. The utility model realizes the miniaturization design of the product by the structure that the coil is arranged in the shell, and saves the space. The surface-mounted type bonding pad structure of the shell realizes a surface-mounted type mounting structure of a product, and mounting efficiency of the radio frequency transformer is greatly improved.

Description

Novel radio frequency transformer

Technical Field

The utility model relates to a transformer, in particular to a radio frequency transformer, and belongs to the technical field of electronic elements.

Background

The radio frequency transformer works by combining the electromagnetic induction principle and the transmission line principle. The rf transformer is widely applied to various low-power electronic circuits to achieve functions of impedance matching, direct current isolation, common mode rejection and the like, and generally comprises two groups of magnetically coupled coils.

There are many specifications and shapes of radio frequency transformers at home and abroad, but the size of the traditional radio frequency transformer is too large and does not meet the requirements of military electronic components, so that the application range of the radio frequency transformer is limited. In addition, the weldability and the vibration of the existing radio frequency transformer are often not required. The existing product structure technology can not realize the miniaturization and surface-mounted structure design of the product, so that the overall dimension of the product is increased and the efficiency is low when the transformer is installed.

Radio frequency technology has very wide application in the fields of television, broadcasting, mobile phones, radars, automatic identification, intelligent terminal equipment and the like. With the requirement of miniaturization of electronic components, the size of the radio frequency transformer is reduced, and the realization of miniaturization design and surface-mounted mounting design of the radio frequency transformer is also becoming more important.

SUMMERY OF THE UTILITY MODEL

With the development of miniaturization of the radio frequency transformer, in order to reduce the overall dimension of the radio frequency transformer and improve the installation efficiency of the transformer, the surface-mounted pad structure design of the radio frequency transformer is very important. The utility model mainly solves the technical problems of miniaturization design, surface-mounted structure and high density of the product, realizes the miniaturization and surface-mounted mounting design of the product, saves space and improves the mounting efficiency of the product. The utility model realizes the miniaturization design of the product by the structure that the coil is arranged in the shell, and saves the space. The surface-mounted type bonding pad structure of the shell realizes a surface-mounted type mounting structure of a product, and mounting efficiency of the radio frequency transformer is greatly improved.

A novel radio frequency transformer comprises a shell and a coil structure. The coil structure comprises a magnetic ring and a winding. The winding is wound on the outer surface of the magnetic ring. The shell is a cavity structure with an inner cavity. The coil structure is disposed in the inner cavity of the housing. The radio frequency transformer is a built-in structure with a coil structure built in the shell.

In the utility model, the shell is of a cuboid structure. Wherein: the housing of the cuboid structure is a structure with five surfaces provided with side walls and one surface being open. The surface of the side wall at one side of the opening position is provided with a bonding pad.

In the utility model, the shell is of a cylindrical structure. Wherein: the shell of the cylinder structure is a structure with a side wall, a top surface wall and an open bottom surface. The surface of the side wall at one side of the opening position is provided with a bonding pad.

Preferably, the pad is a surface mount pad.

Preferably, the coil structure comprises a primary coil and a secondary coil. The primary coil and the secondary coil are wound on the magnetic ring. The primary coil and the secondary coil are both disposed within the interior cavity of the housing.

Preferably, the housing is a ceramic housing.

Preferably, the pad is of a metal layer structure.

Preferably, the side wall of the housing at the side of the open position has a convex structure, and the pad is disposed on the surface of the convex structure.

Preferably, the side wall of the housing at the side of the opening position is provided with a plurality of independent protruding structures, and the surface of each protruding structure is provided with a pad independently.

Preferably, the ends of the primary coil and the secondary coil are pins, and the pins of the primary coil and the secondary coil are independently arranged on the pads of the convex structures.

In the utility model, the novel radio frequency transformer has the following external dimensions: the length is 5-10mm, the width is 5-10mm, and the height is 4-8 mm.

In the utility model, the coil structure is arranged in the inner cavity of the shell by designing the shell into a cavity structure with the inner cavity; in the coil built-in structure, the size of the shell is the maximum external dimension of the product, so that the external dimension of the product is reduced.

In the utility model, the surface-mounted bonding pad is arranged at the bottom of the side wall of the shell, and the pin of the coil is welded on the bonding pad; the novel radio frequency transformer provided by the utility model achieves the purpose of surface-mounted installation, and improves the installation efficiency of the radio frequency transformer.

In the utility model, the shell of the radio frequency transformer is made of ceramic materials, the high-density design is realized, the bonding pad adopts a surface-mounted bonding pad, and the lead-out wire of the coil is welded on the bonding pad of the ceramic shell, so that the surface-mounted design is realized. In the present invention, in the case of the present invention,

in the present invention, the housing may be of a rectangular parallelepiped shape or a cylindrical shape. The housing can be arranged into different shapes according to the requirements of specific electronic devices.

In the utility model, one side of the side wall of the shell, which is positioned at the opening position, is provided with a convex structure, and the convex structure is used for arranging independent bonding pads, so that each pin of each coil can be independently arranged on different bonding pads to realize the independent control of a circuit; and secondly, the coil in the inner cavity of the shell is convenient to dissipate heat through the convex structure, so that the normal and stable work of the whole radio frequency transformer is ensured.

In the utility model, the coil is designed in a built-in mode, so that the overall dimension of the whole radio frequency transformer is greatly reduced, and the requirement on miniaturization of the radio frequency transformer in the fields of televisions, broadcasting, mobile phones, radars, automatic identification, intelligent terminal equipment and the like is met.

In the utility model, the surface-mounted mounting design is realized through the design of the surface-mounted bonding pad, and the mounting efficiency of the radio-frequency voltage transformer is greatly improved.

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

1. the wound coil is arranged in the shell, and the coil is of a built-in structure, so that the overall dimension of the product is reduced, the miniaturized design is realized, and the space is saved.

2. The shell is made of ceramic materials, and the bonding pad is a surface-mounted bonding pad, so that the surface-mounted mounting design is realized, and the mounting efficiency of the product is improved.

Drawings

Fig. 1 is a schematic perspective view of a novel rf transformer according to the present invention;

FIG. 2 is a top view of a novel RF transformer of the present invention;

FIG. 3 is a side view of a novel RF transformer of the present invention;

FIG. 4 is a schematic view of a cubic housing of the novel radio frequency transformer according to the present invention;

FIG. 5 is a schematic diagram of a three-dimensional structure of a cylinder housing of a novel RF transformer according to the present invention;

fig. 6 is a schematic diagram of a coil structure of a novel rf transformer according to the present invention.

Reference numerals:

1: a housing; 101: a raised structure; 2: a coil structure; 201: a magnetic ring; 202: winding; 203: a primary coil; 204: a secondary coil; 3: and a bonding pad.

Detailed Description

The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.

Example 1

As shown in fig. 1, a novel radio frequency transformer comprises a housing 1 and a coil structure 2. The coil structure 2 includes a magnetic ring 201 and a winding 202. The winding 202 is wound on the outer surface of the magnetic ring 201. The housing 1 is a cavity structure with an inner cavity. The coil structure 2 is arranged in the inner cavity of the housing 1. The radio frequency transformer is a built-in structure with a coil structure 2 built in a shell 1.

Example 2

Example 1 is repeated as shown in fig. 1 to 4, except that the housing 1 has a rectangular parallelepiped structure. Wherein: the housing of the cuboid structure is a structure with five surfaces provided with side walls and one surface being open. The surface of the side wall at one side of the opening position is provided with a bonding pad 3.

Example 3

Example 1 was repeated as shown in fig. 5, except that the housing 1 had a cylindrical structure. Wherein: the shell of the cylinder structure is a structure with a side wall, a top surface wall and an open bottom surface. The surface of the side wall at one side of the opening position is provided with a bonding pad 3.

Example 4

Example 2 was repeated except that the pad 3 was a surface mount pad.

Example 5

Example 2 is repeated as shown in fig. 6, except that the coil structure 2 includes a primary coil 203 and a secondary coil 204. The primary coil 203 and the secondary coil 204 are wound on the magnetic ring 201. Both the primary coil 203 and the secondary coil 204 are built into the inner cavity of the housing 1.

Example 6

Example 2 was repeated except that the housing 1 was a ceramic housing.

Example 7

Example 6 was repeated except that the pad 3 was a metal layer structure.

Example 8

Embodiment 3 is repeated except that the side wall of the housing at the side of the open position has a convex structure 101, and the pad 3 is provided on the surface of the convex structure 101.

Example 9

Example 7 was repeated except that the side wall of the housing at the side of the open position was provided with a plurality of individual bump structures 101, and each bump structure 101 was provided with a pad 3 on its surface independently. The ends of the primary coil 203 and the secondary coil 204 are pins, and the pins of the primary coil 203 and the secondary coil 204 are independently arranged on the bonding pad 3 of the convex structure 101.

The novel radio frequency transformer provided by the utility model adopts a coil structure wound on the magnetic ring, and then the wound coil is arranged in the shell, and the size of the shell is the maximum external size of the product, so that the external size of the product is reduced. The size of the product shell is L (6.35 plus or minus 0.1) multiplied by W (6.1 plus or minus 0.1) multiplied by H (4.5 plus or minus 0.1) mm.

According to the novel radio frequency transformer provided by the utility model, the shell is made of ceramic materials, the high-density design is realized, the surface-mounted bonding pad is adopted as the bonding pad, and the lead-out wire of the coil is welded on the bonding pad of the ceramic shell, so that the surface-mounted design is realized, the overall height of the product is reduced, the purpose of surface-mounted mounting is achieved, and the mounting efficiency of the radio frequency transformer is improved.

Claims

1. A novel radio frequency transformer comprises a shell (1) and a coil structure (2); the method is characterized in that: the coil structure (2) comprises a magnetic ring (201) and a winding (202); the winding (202) is wound on the outer surface of the magnetic ring (201); the shell (1) is a cavity structure with an inner cavity; the coil structure (2) is arranged in the inner cavity of the shell (1); the radio frequency transformer is a built-in structure with a coil structure (2) built in a shell (1).

2. The novel radio frequency transformer of claim 1, characterized in that: the shell (1) is of a cuboid structure; wherein: the shell of the cuboid structure is a structure with five surfaces provided with side walls and one surface being open; the surface of the side wall at one side of the opening position is provided with a bonding pad (3).

3. The novel radio frequency transformer of claim 1, characterized in that: the shell (1) is of a cylindrical structure; wherein: the shell of the cylindrical structure is a structure with a side wall, a top surface wall and an open bottom surface; the surface of the side wall at one side of the opening position is provided with a bonding pad (3).

4. A novel radio frequency transformer according to claim 2 or 3, characterized in that: the bonding pad (3) is a surface-mounted bonding pad.

5. The novel radio frequency transformer of claim 4, characterized in that: the coil structure (2) comprises a primary coil (203), a secondary coil (204); the primary coil (203) and the secondary coil (204) are wound on the magnetic ring (201); the primary coil (203) and the secondary coil (204) are both built into the inner cavity of the housing (1).

6. The novel radio frequency transformer of claim 5, characterized in that: the shell (1) is a ceramic shell; the bonding pad (3) is of a metal layer structure.

7. The novel radio frequency transformer of claim 6, characterized in that: the side wall of the shell is provided with a convex structure (101) at one side of the open position, and the bonding pad (3) is arranged on the surface of the convex structure (101).

8. The novel radio frequency transformer of claim 7, wherein: the side wall of the shell is located at one side of the opening position and provided with a plurality of independent protruding structures (101), and a bonding pad (3) is independently arranged on the surface of each protruding structure (101).

9. The novel radio frequency transformer of claim 8, wherein: the tail ends of the primary coil (203) and the secondary coil (204) are pins, and the pins of the primary coil (203) and the secondary coil (204) are independently arranged on the bonding pad (3) of the convex structure (101).

10. The novel radio frequency transformer of any one of claims 1-9, wherein: the novel radio frequency transformer has the following overall dimensions: the length is 5-10mm, the width is 5-10mm, and the height is 4-8 mm.