WO2023061092A1

WO2023061092A1 - Sma connector

Info

Publication number: WO2023061092A1
Application number: PCT/CN2022/116497
Authority: WO
Inventors: 朱魏; 郭嘉帅
Original assignee: 深圳飞骧科技股份有限公司
Priority date: 2021-10-15
Filing date: 2022-09-01
Publication date: 2023-04-20
Also published as: CN215933970U

Abstract

The present utility model provides an SMA connector, comprising: a flange; a dielectric material, the dielectric material being provided in the flange; a center conductor, the center conductor running through the dielectric material to be fixedly connected; a connection head, which is fixed on the upper surface of the flange and is located outside the dielectric material, the flange being provided with leg fixing grooves which run through the flange, a plurality of legs being detachably arranged in each leg fixing groove, the plurality of legs being capable of moving along the leg fixing groove, and the legs being located on the lower surface of the flange; and fixing clamp pieces, which are oppositely provided on two sides of the connection head and fixed on the upper surface of the flange, each clamp piece comprising a fixing clamp piece body, a fastening portion protruding and extending from one end of the fixing clamp piece body in a direction close to the connection head, and a button protruding and extending from one side of the fixing clamp piece body in a direction distant from the connection head. The present utility model facilitates fixing, and has a wide application range.

Description

A kind of SMA connector

【Technical field】

The utility model relates to the technical field of electronic equipment, in particular to an SMA connector.

【Background technique】

SMA (Sub-Miniature-A) connector is a widely used coaxial connector with small threaded connection. It has the characteristics of wide frequency band, excellent performance, reliability and long life. SMA connectors are suitable for connecting radio frequency cables or microstrip lines in radio frequency circuits of microwave equipment and digital communication systems in the 0-26.5GHz frequency band. Applications such as telecommunications, networking, wireless communications, and testing and measuring instruments.

Due to the different test environments, the structure of the SMA connector used will be different, such as positive foot, deflection seat, flange seat and other specifications. Each specification of SMA connector is only suitable for one test environment, which has great limitations. In addition, the traditional coaxial cable is fixed by screwing, which is cumbersome to use, and the effect of disassembly and assembly is not good.

Therefore, it is necessary to provide a new SMA connector to solve the above technical problems.

【Content of utility model】

The purpose of the utility model is to overcome at least one of the above-mentioned technical problems, and provide an SMA connector that is easy to fix, has a wide range of application, and is easy to replace.

In order to achieve the above purpose, the utility model provides an SMA connector, including:

flange;

a dielectric material, the dielectric material is arranged in the flange;

a central conductor, the central conductor is fixedly connected through the dielectric material;

a connecting head, the connecting head is fixed on the upper surface of the flange and is located outside the dielectric material;

The flange plate is penetrated with a column foot fixing groove, and a plurality of column feet are detachably arranged in the column foot fixing groove, and the plurality of column feet can move along the column foot fixing groove, and the column foot The feet are located on the lower surface of the flange;

a fixing clip, the fixing clip is relatively arranged on both sides of the connecting head and fixed on the upper surface of the flange;

The fixing clip includes a fixing clip body, a locking part formed by protruding from one end of the fixing clip body in a direction close to the connecting head, and a protrusion extending from one side of the fixing clip body in a direction away from the connecting head. out of the button formed by the extension.

Furthermore, one side of the flange is recessed to form a mounting groove, and a probe is provided in the mounting groove, and the probe is connected to the flange through a stretchable metal wire.

Furthermore, the flange surface forming the installation groove is arranged parallel to a side surface of the fixing clip body.

Furthermore, the probe is a 50 ohm probe.

Furthermore, there are two column foot fixing grooves arranged oppositely, there are four column feet, and two column feet are installed in each of the column foot fixing grooves.

Furthermore, the column feet are installed in the fixing grooves of the column feet by screws.

Furthermore, one side of the flange is oppositely provided with a plurality of installation holes, and the plurality of installation holes are used for placing the removed screws.

Furthermore, the fixing groove of the column foot includes a positioning groove, the positioning groove is located on the lower surface of the flange, and the column foot is snapped into the positioning groove.

Furthermore, the cross-section of the column foot is square.

Furthermore, an external thread structure is provided on the outer wall of the connector.

Compared with the related technology, the utility model makes the SMA connector applicable to different application scenarios by detachably installing a plurality of columns on the flange; the columns can be moved along the fixing grooves of the columns to match different The test requirements of the thickness test board; when the column foot is aging, the column foot can be replaced by disassembly, which is convenient for maintenance; the fixed frame set opposite to the two sides of the connector is used to fix the coaxial line, and the fixed clip does not need to be screwed. , you only need to press down to be locked by the fixing clip. There are two buttons on both sides of the fixing clip that can be tightened, which is easy to use.

【Description of drawings】

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is the overall structural representation of the SMA connector provided by the utility model;

Fig. 2 is the structural representation of the SMA connector provided by the utility model;

Fig. 3 is a structural schematic diagram of the SMA connector provided by the utility model without installing column feet;

Fig. 4 is the structural diagram of the SMA connector partial foot provided by the utility model;

Fig. 5 is a structural diagram of the positive pin of the SMA connector provided by the utility model;

Fig. 6 is the structural representation of the SMA connector provided by the utility model;

Fig. 7 is a diagram 1 of the use state of the fixing clip of the SMA connector provided by the utility model;

Fig. 8 is the second view of the use state of the fixing clip of the SMA connector provided by the utility model;

Fig. 9 is a diagram of the probe usage state of the SMA connector provided by the present invention;

Fig. 10 is a circuit diagram of the test impedance provided by the utility model.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1-9, the utility model provides an SMA connector, including: a flange 1, a dielectric material 2, a central conductor 3, a connector 4 and a fixing clip. The dielectric material 2 is arranged in the flange 1; the central conductor 3 is fixedly connected through the dielectric material 2; the connector 4 is fixed on the upper surface of the flange 1 and is located on the The outer side of the dielectric material 2; the flange 1 is provided with a column foot fixing groove 11, and a plurality of column feet 5 are detachably arranged in the column foot fixing groove 11, and a plurality of the column feet 5 can be arranged along the The column pin fixing groove 11 moves, and the column pin 5 is located on the lower surface of the flange plate 1; the fixing clip 6 is relatively arranged on both sides of the connector 4 and fixed on the flange plate 1 The upper surface of the fixed clip includes a fixed clip body 61, a clamping portion 62 formed by protruding from one end of the fixed clip body 61 in a direction close to the connecting head 4, and a clamping portion 62 formed by one end of the fixed clip body 61 A button 63 formed to protrude in a direction away from the connecting head 4 .

Specifically, the shape of the flange 1 is roughly square, and it is made of gold-plated copper. A through dielectric material hole is provided at the center of the flange 1, and the dielectric material 2 is fixed in the dielectric material hole. The central conductor 3 is a long and thin cylinder, the central conductor 3 runs through the dielectric material 2 , one end of the central conductor 3 extends out of the upper surface of the flange 1 , and the other end extends out of the lower surface of the flange 1 . When the SMA connector is used for connection, the central conductor 3 plays a role of signal transmission. The dielectric material 2 outside the central conductor 3 can ensure that the impedance of the central conductor 3 for transmitting signals is 50 ohms. Optionally, the dielectric material 2 is made of polytetrafluoroethylene (PTFE), and the center conductor 3 is made of gold-plated copper.

Connector 4 can connect an external signal source to the SMA connector. The connector 4 is cylindrical in shape, hollow inside, and made of gold-plated copper. The inner diameter of the connecting head 4 is the same as the outer diameter of the dielectric material 2 , and the connecting head 4 fixes the upper surface of the flange 1 and is located outside the dielectric material 2 . When the connector 4 is connected to an external signal source, the central conductor 3 contacts the signal end of the signal source to realize signal transmission.

The clipping portion 62 is a triangular clipping structure, which is convenient for clipping and fixing.

The flange 1 is provided with through screw holes 12 , and the screw holes 12 can be used for fixing the flange 1 .

In this embodiment, one side of the flange 1 is recessed to form a mounting groove 14, and a probe 7 is arranged in the mounting groove 14, and the probe 7 and the flange 1 are connected through a telescopic The metal wire 8 is connected. After the probe 7 is pulled out from the installation groove 14, the probe 7 is placed on the EVB test board 9, and the impedance of the EVB can be calculated by using the connecting vector. By accommodating the probe pen 7 in the installation groove 14, the whole is small and exquisite, does not take up space, and at the same time, it can also protect the probe pen 7 and increase the service life of the probe pen 7.

Optionally, the flange surface forming the installation groove 14 is arranged parallel to a side surface of the fixing clip body 61 . It is convenient for the setting of the installation groove 14 and the installation and use of the probe pen 7 .

Optionally, the probe 7 is a 50 ohm probe.

In this embodiment, there are two column foot fixing grooves 11 arranged oppositely, and there are four column foot fixing grooves 11 , and two column feet 5 are installed in each column foot fixing groove 11 . The column foot 5 can move along the column foot fixing groove 11, so that the SMA connector can be applied to different application scenarios. The position of the column foot 5 can be conveniently adjusted by the screw 53 .

Optionally, the column foot 5 is installed in the column foot fixing groove 11 through a screw 53 . The number of column feet 5 is multiple, and the column feet 5 are detachably installed on the lower surface of the flange 1 through the column foot fixing grooves 11 . The column foot 5 can be connected with the test board by welding. In this embodiment, the column foot 5 is installed on the column foot fixing groove 11 through a screw 53 . The column foot 5 can also be connected to the column foot fixing groove 11 in other ways, such as buckle, which is not limited in the present invention.

As shown in FIG. 3 , the SMA connector does not have a column pin 5 , which corresponds to a traditional SMA connector that does not need a column pin. The applicable test environment for the SMA connector without the column pin 5 is when the SMA connector is used in a metal shielding cavity. In order to transmit the signal in the metal shielding cavity, the SMA connector is often fixed on the side wall of the metal shielding cavity, and the central conductor 3 for transmitting signals goes deep into the metal shielding cavity. At this time, remove the column foot 5 of the SMA connector, and fix it on the metal shielding cavity through the screw hole 12 .

As shown in FIG. 4 , four pins 5 are installed on the SMA connector, wherein the pin 51 is located at the end of the pin fixing slot 11 , and the pin 52 is located in the middle of the pin fixing slot 11 . Such an SMA connector corresponds to a traditional offset-pin SMA connector. The off-pin SMA connector is mostly used in R&D and testing. The column foot 51 is fixed at the end of the column foot fixing groove 11 by screws, and the position of the column foot 52 moves according to the thickness of the test board. After the position of the column foot 52 is determined, the column foot is welded to the test board.

As shown in FIG. 5 , four pins are installed on the SMA connector. The pin 51 is located at one end of the pin fixing slot 11 , and the pin 52 is located at the other end of the pin fixing slot 11 . Such SMA connectors correspond to traditional positive-pin SMA connectors. Positive-pin SMA connectors are mostly used in mass production testing. The positions of equipment and connecting wires are mostly vertical, and in order not to occupy an area, it is often necessary to use positive-pin soldering on the test board.

In this embodiment, one side of the flange 1 is oppositely provided with a plurality of installation holes 13 , and the plurality of installation holes 13 are used for placing the removed screws 53 .

In this embodiment, the column base fixing groove 11 includes a positioning slot 111 , the positioning slot 111 is located on the lower surface of the flange 1 , and the column base 5 is snapped into the positioning slot 111 . When the column foot 5 needs to be installed, the column foot 5 is snapped into the positioning groove 111, and the positioning groove 111 can avoid unnecessary rotation of the column foot 5.

Optionally, the section of the column foot 5 is square. The square column foot 5 is convenient for processing and manufacturing. The column foot 5 can also be in other shapes, and the comparison of the present invention is not limited.

In this embodiment, an external thread structure is provided on the outer wall of the connecting head 4 . The external thread structure can be used for connection with other components.

In this embodiment, as shown in Figure 10, the term 50 ohms on the left side of the figure is the SMA connector, the Mlin in the middle is the EVB to be tested, and the 50 ohms on the right is the probe pen, forming a circuit for testing impedance. The real and imaginary parts of the impedance value can be obtained by connecting the vector net to the SMA. In this way, the impedance of the EVB is optimized.

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims

A kind of SMA connector, is characterized in that, comprises:

flange;

a dielectric material, the dielectric material is arranged in the flange;

a central conductor, the central conductor is fixedly connected through the dielectric material;

a connecting head, the connecting head is fixed on the upper surface of the flange and is located outside the dielectric material;

The flange plate is penetrated with a column foot fixing groove, and a plurality of column feet are detachably arranged in the column foot fixing groove, and the plurality of column feet can move along the column foot fixing groove, and the column foot The feet are located on the lower surface of the flange;

a fixing clip, the fixing clip is relatively arranged on both sides of the connecting head and fixed on the upper surface of the flange;

The fixing clip includes a fixing clip body, a locking part formed by protruding from one end of the fixing clip body in a direction close to the connecting head, and a protrusion extending from one side of the fixing clip body in a direction away from the connecting head. out of the button formed by the extension.
The SMA connector according to claim 1, wherein one side of the flange is recessed to form a mounting groove, and a probe is provided in the mounting groove, and the probe passes through the flange. A retractable wire connection.
The SMA connector according to claim 2, wherein the flange surface forming the installation groove is arranged parallel to a side surface of the fixing clip body.
The SMA connector according to claim 2, wherein the probe is a 50 ohm probe.
The SMA connector according to claim 1, characterized in that, there are two column pin fixing grooves oppositely arranged, and there are four column pins, and two of the column pin fixing grooves are installed in each of the column pin fixing grooves. Pillars.
The SMA connector according to claim 5, wherein the column foot is installed in the column foot fixing groove by screws.
The SMA connector according to claim 6, wherein one side of the flange is oppositely provided with a plurality of installation holes, and the plurality of installation holes are used for placing the removed screws.
The SMA connector according to claim 1, wherein the fixing groove of the column foot includes a positioning groove, the positioning groove is located on the lower surface of the flange, and the column foot is snapped into the positioning groove .
The SMA connector according to claim 8, wherein the cross-section of the column pin is square.
The SMA connector according to claim 1, wherein an external thread structure is provided on the outer wall of the connecting head.