SMA connector suitable for 0-6GHZ frequency band

Abstract

The utility model relates to the technical field of connectors, and particularly discloses an SMA connector suitable for a 0-6GHZ frequency band, the SMA connector comprises an outer conductor, a first insulator, a second insulator, an inner conductor and a pin, the outer conductor is internally provided with a first jack and a second jack which are vertically communicated, the first insulator is cooperatively inserted in the first jack, and the second insulator is cooperatively inserted in the second jack. The second insulator is cooperatively inserted into the second jack, and the first insulator abuts against the second insulator; inner hole channels are formed in the first insulator and the second insulator respectively, and the inner conductor is arranged in the inner hole channels of the first insulator and the second insulator in a penetrating mode at the same time; the peripheral wall of one end of the outer conductor is provided with an external thread coaxial with the first jack, the pin is fixedly connected to the other end of the outer conductor, and the pin is parallel to the axis of the second jack. The radio frequency connector has the effect of solving the problem that a radio frequency connector is difficult to meet the transmission requirements of a 5G network at the frequency bands of 3.5 GHZ and 4.9 GHZ.

Description

Technical Field

[0001] This application relates to the technical field of connectors, and in particular to an SMA connector applicable to the 0-6 GHz frequency band. Background Art

[0002] The SMA connector, also known as a radio frequency connector, is an important radio frequency transmission component in the microwave field. Due to its wide frequency band, convenient and reliable connection, excellent performance, and low cost, it is widely used in microwave communication equipment, instruments, and weapon systems. In recent years, with the rapid development of modern communication technology, the technical requirements for radio frequency connectors by the whole machine equipment are getting higher and higher, such as wide frequency band, low standing wave, miniaturization, multi-function, high reliability, fast connection, etc. New connectors have emerged as the times require, putting forward higher requirements for the design of connector products. In addition to ensuring the use functions and reliability requirements of the connectors, there are also higher requirements for the loss and voltage standing wave ratio of the signal transmission part.

[0003] Currently, most of the radio frequency connectors used to connect to the PCB motherboard only meet the frequency of 0-3 GHz. With the popularization of the 5G network, the radio frequency connectors with a frequency of 0-3 GHz are difficult to meet the transmission requirements of the 5G network in the 3.5 GHz and 4.9 GHz frequency bands. Utility Model Content

[0004] In order to solve the problem that it is difficult for radio frequency connectors to meet the transmission requirements of the 5G network in the 3.5 GHz and 4.9 GHz frequency bands, this application provides an SMA connector applicable to the 0-6 GHz frequency band.

[0005] An SMA connector applicable to the 0-6 GHz frequency band provided by this application adopts the following technical solutions:

[0006] An SMA connector applicable to the 0-6 GHz frequency band includes an outer conductor, a first insulator, a second insulator, an inner conductor, and a pin. A first jack and a second jack that are vertically connected are provided in the outer conductor. The first insulator is fitted and inserted into the first jack, the second insulator is fitted and inserted into the second jack, and the first insulator and the second insulator are in contact with each other. Inner hole channels are provided in the first insulator and the second insulator respectively, and the inner conductor passes through the inner hole channels of the first insulator and the second insulator at the same time. An external thread coaxial with the first jack is provided on the peripheral wall at one end of the outer conductor, the pin is fixedly connected to the other end of the outer conductor, and the pin is parallel to the axis of the second jack.

[0007] By adopting the above technical solution, during use, the inner conductor is inserted into the first jack and the second jack inside the outer conductor, and then the first insulator and the second insulator are sleeved on the inner conductor through the inner hole channel. At the same time, the first insulator is press-fitted into the first jack, and the second insulator is press-fitted into the second jack, thereby fixing the inner conductor. Then, the external thread on the outer conductor is connected to the antenna port, and the pin on the outer conductor is welded and fixed on the PCB main board through the jack. The cooperation and mutual abutment of the first insulator and the second insulator can form a relatively perfect support and fixation for the inner conductor. With the setting of the integrated inner conductor, the internal electric field distribution of the connector is more uniform when used in the high-frequency band, effectively reducing signal attenuation and ensuring stable signal transmission. After testing, the VSWR of the connector of this application is good in the frequency range of 0 - 6GHZ, meeting the transmission requirements of the 5G network in the 3.5GHZ and 4.9GHZ frequency bands. Moreover, the overall installation structure of the connector of this application is simple, simplifying the complex structure of the traditional connector and reducing the production cost.

[0008] Optionally, a nut, an internal tooth gasket, and a spring gasket are sequentially sleeved on the external thread of the outer conductor.

[0009] By adopting the above technical solution, the setting of the nut, the internal tooth gasket, and the spring gasket enhances the stability of the threaded connection between the connector of this application and the antenna port, prevents connection looseness during high-frequency signal transmission, and thus ensures the stability of signal transmission.

[0010] Optionally, the outer diameters of the first insulator and the second insulator are the same. The wall surfaces where the first insulator and the second insulator abut are both set as 45° inclined planes, and the connection between the inner hole channels of the first insulator and the second insulator is arc-transitioned.

[0011] By adopting the above technical solution, after the first insulator and the second insulator are respectively press-fitted into the first jack and the second jack inside the outer conductor, the inclined planes on the first insulator and the second insulator abut against each other, enabling rapid positioning. The arc-transition setting at the connection of the inner hole channels of the first insulator and the second insulator helps the smooth transmission of signals inside the inner conductor and reduces signal loss during transmission.

[0012] Optionally, a plurality of positioning bosses are provided on the inclined plane of the first insulator, and positioning grooves corresponding to each positioning boss are provided on the inclined plane of the second insulator.

[0013] By adopting the above technical solution, the cooperation setting of the positioning bosses and the positioning grooves further improves the connection stability and positioning accuracy between the first insulator and the second insulator.

[0014] Optionally, limiting rings are integrally formed on the peripheral walls of the mutually remote ends of the first insulator and the second insulator. Anti-rotation surfaces perpendicular to the end faces of the limiting rings are provided on the limiting rings, and limiting grooves adapted to the limiting rings are provided on the inner walls of the first insertion hole and the second insertion hole.

[0015] By adopting the above technical solution, the design and cooperation of the limiting ring and the limiting groove effectively prevent the rotation and displacement of the insulator during use, and further enhance the structural stability of the connector.

[0016] Optionally, the first insulator includes a front end, a middle end, and a rear end integrally formed in sequence. The front end is used to abut against the second insulator. The outer diameters of the front end and the rear end are the same, and the outer diameter of the middle end is smaller than the outer diameters of the front end and the rear end.

[0017] By adopting the above technical solution, since the processing precision requirements of the first insulator are relatively high, the structural dimensions of the integrally formed front end, middle end, and rear end are set. On the premise of ensuring the overall structural strength, precision, and stability of the first insulator, the production process is simplified, and the assembly difficulty of the first insulator is reduced.

[0018] Optionally, exhaust through grooves are provided on the outer walls of the front end and the rear end along the length direction of the first insulator.

[0019] By adopting the above technical solution, the provision of the exhaust through grooves helps to discharge air in time during the assembly process of the first insulator, reduce the air pressure change inside the insulator, avoid damage to the insulator caused by temperature change or external pressure change, and thus improve the service life of the connector of the present application.

[0020] Optionally, annular grooves are provided on the inner walls of the inner hole channels of the first insulator and the second insulator, and elastic washers are clamped in the annular grooves.

[0021] By adopting the above technical solution, the elastic washer not only enhances the friction between the inner conductor and the insulator, improves the stability of the inner conductor fixation, but also plays a certain buffering role, helping to reduce the damage to the inner conductor caused by vibration and impact during use.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The structural settings of the first insulator, the second insulator, and the inner conductor in the outer conductor enable the internal electric field distribution of the connector of the present application to be more uniform when used in the high-frequency band, effectively reducing signal attenuation, ensuring the stable transmission of signals, and improving the problem that traditional RF connectors are difficult to meet the transmission requirements of the 5G network in the 3.5 GHz and 4.9 GHz frequency bands; moreover, the overall installation structure of the connector of the present application is simple, simplifying the complex structure of traditional connectors and reducing the production cost;

[0024] 2. The provision of beveled surfaces on the first insulator and the second insulator facilitates the quick positioning and abutment of the two, reducing the assembly difficulty. Moreover, the provision of an arc transition at the connection of the inner hole channels of the first insulator and the second insulator makes the posture of the inner conductor in the first insulator and the second insulator smoother, improving the smoothness of signal transmission in the inner conductor and reducing signal loss during transmission;

[0025] 3. The structure and dimension settings of the front end, middle end, and rear end of the first insulator formed integrally simplify the production process and reduce the assembly difficulty of the first insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0028] Figure 2 is the exploded structural schematic diagram of the embodiment of the present application;

[0029] Figure 3 is the sectional structural schematic diagram of the embodiment of the present application;

[0030] Figure 4 is the standing wave ratio diagram of the connector of the present application.

[0031] Reference numerals: 1, outer conductor; 11, first jack; 111, limit groove; 12, second jack; 13, external thread; 14, spring washer; 15, internal tooth washer; 16, nut; 2, first insulator; 21, inner hole channel; 22, annular groove; 23, elastic washer; 24, beveled surface; 241, positioning boss; 242, positioning groove; 25, limit ring; 251, anti-rotation surface; 26, front end; 261, exhaust through groove; 27, middle end; 28, rear end; 3, second insulator; 4, inner conductor; 5, pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following is a more detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0033] The embodiment of the present application discloses an SMA connector applicable to the 0 - 6 GHz frequency band. Refer to Figures 1-2, the SMA connector applicable to the 0-6 GHz frequency band includes an outer conductor 1, a first insulator 2, a second insulator 3, an inner conductor 4, and a pin 5.

[0034] Referring to Figure 3 , on the end face of the front end 26 of the outer conductor 1, a first jack 11 is provided, and on the end face of the rear end 28 of the outer conductor 1, a second jack 12 is provided. The first jack 11 and the second jack 12 are vertically connected. The first insulator 2 is closely fitted and inserted into the first jack 11, the second insulator 3 is closely fitted and inserted into the second jack 12, and the first insulator 2 and the second insulator 3 are in contact. Inner hole channels 21 are provided in both the first insulator 2 and the second insulator 3, and the inner hole channels 21 of the two are connected. The inner conductor 4 is simultaneously inserted through the two inner hole channels 21 and is closely fitted with the inner wall of the inner hole channels 21. The inner conductor 4 is used for signal transmission.

[0035] During assembly, first place the inner conductor 4 inserted through in the first jack 11 and the second jack 12, then sleeved the second insulator 3 on one end of the inner conductor 4 through the inner hole channel 21 of the second insulator 3, and closely fit and insert the second insulator 3 into the second jack 12; then sleeved the first insulator 2 on the other end of the inner conductor 4 through the inner hole channel 21 of the first insulator 2, and closely fit and insert the first insulator 2 into the first jack 11 until the first insulator 2 abuts against the second insulator 3, completing the fixation of the inner conductor 4.

[0036] In order to reduce the probability of the inner conductor 4 sliding within the inner hole channel 21, annular grooves 22 are provided on the inner walls of the inner hole channels 21 of the first insulator 2 and the second insulator 3. Elastic washers 23 are clamped in the annular grooves 22. When the inner conductor 4 is inserted through the inner hole channel 21, the elastic washers 23 tightly embrace the peripheral wall of the inner conductor 4 under the action of their own elastic force, increasing the frictional force of the relative sliding of the inner conductor 4.

[0037] In addition, referring to Figure 1, on the peripheral wall of the front end 26 of the outer conductor 1, an external thread 13 coaxial with the first jack 11 is provided. The front end 26 of the outer conductor 1 is threadedly connected to the antenna port through the external thread 13. The inner conductor 4 passing through the first insulator 2 is connected to the antenna and is used for transmitting electrical signals. In order to improve the stability of the threaded connection between the outer conductor 1 and the antenna port, before the outer conductor 1 is threadedly connected to the antenna port, a spring washer 14, an internal tooth washer 15 and a nut 16 are successively sleeved. After the antenna port is threadedly connected to the external thread 13 of the outer conductor 1, the common setting of the nut 16, the internal tooth washer 15 and the spring washer 14 plays a role in preventing rotation and stable connection of the antenna port, preventing the antenna port and the connector of the present application from loosening and falling off during use. The pin 5 is integrally formed at the rear end 28 of the outer conductor 1 and is parallel to the axis of the second jack 12. Exemplarily, four pins 5 are symmetrically arranged. The pin 5 is used for plugging and fixing on the PCB main board. At the same time, the inner conductor 4 passes through the second insulator 3 and is used for communicating with the circuit on the PCB main board.

[0038] Referring to Figure 3 , further, the outer diameters of the first insulator 2 and the second insulator 3 are the same to reduce the manufacturing complexity and improve the convenience of assembly. The abutting wall surfaces of the first insulator 2 and the second insulator 3 are provided with 45° beveled surfaces 24 to reduce the concentration of the electric field at the junction of the insulators and further reduce the signal attenuation. The inner hole channels 21 of the first insulator 2 and the inner hole channels 21 of the second insulator 3 adopt arc transitions at the connected parts to ensure that the inner conductor 4 passes through more smoothly and reduce the resistance of signal transmission.

[0039] The structural settings of the first insulator 2, the second insulator 3 and the inner conductor 4 can not only form a good fixing and supporting effect on the inner conductor 4, but also make the signal transmission of the connector of the present application relatively stable during high-frequency transmission. Referring to Figure 4 , after testing, the connector of the present application has a good voltage standing wave ratio (VSWR) in the frequency range of 0 - 6 GHz and meets the transmission requirements of the 5G network in the 3.5 GHz and 4.9 GHz frequency bands; and the overall installation structure of the connector of the present application is simple, simplifies the complex structure of the traditional connector, and reduces the production cost.

[0040] Referring to Figure 2 , at the mutually remote ends, the first insulator 2 and the second insulator 3 are integrally formed with limiting rings 25. The limiting rings 25 are provided with anti-rotation surfaces 251 perpendicular to the end faces of the limiting rings 25 to prevent the rotation of the insulators during use. Correspondingly, on the inner walls of the first jack 11 and the second jack 12, matching limiting grooves 111 are provided corresponding to the limiting rings 25 to cooperate with these limiting rings 25, so as to ensure the fixed position of the insulators and improve the stability and durability of the connector.

[0041] Furthermore, a plurality of positioning bosses 241 are provided on the inclined section 24 of the first insulator 2. The cross-section of the positioning boss 241 is frustum-shaped. A plurality of positioning grooves 242 are provided on the inclined section 24 of the second insulator 3 corresponding to each positioning boss 241. When the inclined sections 24 of the first insulator 2 and the second insulator 3 are fitted together, the positioning bosses 241 on the first insulator 2 are engaged in the positioning grooves 242 of the second insulator 3. The matching design of the positioning boss 241 and the positioning groove 242 can significantly improve the positioning accuracy between the insulators, ensuring the stability and performance of the connector when used in the high-frequency band.

[0042] In addition, to facilitate the insertion of the first insulator 2 into the first jack 11, the first insulator 2 includes a front end 26, a middle end 27, and a rear end 28 that are integrally formed in sequence. The inclined section 24 is provided on the front end 26. The outer diameters of the front end 26 and the rear end 28 are the same, while the outer diameter of the middle end 27 is smaller than the outer diameters of the front end 26 and the rear end 28. The setting of the three diameters of the first insulator 2 simplifies the production process and reduces the assembly difficulty of the first insulator 2 without affecting the overall structural strength, accuracy, and stability of the first insulator 2.

[0043] Further, in order to exhaust the air in the outer conductor 1 in time when assembling the first insulator 2 and reduce the assembly difficulty, exhaust through grooves 261 are provided on the outer walls of the front end 26 and the rear end 28 of the first insulator 2 along the length direction of the first insulator 2.

[0044] The implementation principle of the SMA connector applicable to the 0 - 6 GHz frequency band in the embodiments of the present application is as follows: When assembling the connector of the present application, first insert the inner conductor 4 into the first jack 11 and the second jack 12 of the outer conductor 1, then sleeved the second insulator 3 on one end of the inner conductor 4, and closely fit and insert the second insulator 3 into the second jack 12. Then sleeved the first insulator 2 on the other end of the inner conductor 4, and closely fit and insert the first insulator 2 into the first jack 11 until the inclined section 24 of the first insulator 2 is closely fitted with the inclined section 24 of the second insulator 3. Thus, the support and fixation of the inner conductor 4 are completed. The structural settings of the first insulator 2, the second insulator 3, and the inner conductor 4 enable the connector of the present application to have relatively stable signal transmission during high-frequency transmission. In the 0 - 6 GHz frequency range, the voltage standing wave ratio (VSWR) is good, meeting the transmission requirements of the 5G network in the 3.5 GHz and 4.9 GHz frequency bands. And the overall installation structure of the connector is simple, simplifying the complex structure of the traditional connector and reducing the production cost.

[0045] The above are all optional embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An SMA connector applicable to the 0 - 6 GHz frequency band, characterized in that: It includes an outer conductor (1), a first insulator (2), a second insulator (3), an inner conductor (4) and a pin (5). A first jack (11) and a second jack (12) which are vertically communicated are formed in the outer conductor (1). The first insulator (2) is fitted and inserted into the first jack (11), the second insulator (3) is fitted and inserted into the second jack (12), and the first insulator (2) and the second insulator (3) are in contact with each other. Inner hole channels (21) are respectively formed in the first insulator (2) and the second insulator (3), and the inner conductor (4) passes through the inner hole channels (21) of the first insulator (2) and the second insulator (3) at the same time. An external thread (13) coaxial with the first jack (11) is formed on the peripheral wall at one end of the outer conductor (1), the pin (5) is fixedly connected to the other end of the outer conductor (1), and the pin (5) is parallel to the axis of the second jack (12).

2. The SMA connector applicable to the 0-6 GHz frequency band according to claim 1, characterized in that: A nut (16), an internal tooth gasket (15) and a spring gasket (14) are sequentially sleeved on the external thread (13) of the outer conductor (1).

3. The SMA connector applicable to the 0-6 GHz frequency band according to claim 1, wherein: The first insulator (2) and the second insulator (3) have the same outer diameter. The wall surfaces where the first insulator (2) and the second insulator (3) are in contact are both set as 45° inclined cutting surfaces (24), and the connection between the inner hole channel (21) of the first insulator (2) and the inner hole channel (21) of the second insulator (3) has an arc transition.

4. The SMA connector applicable to the 0-6 GHz frequency band according to claim 3, wherein: A plurality of positioning bosses (241) are arranged on the inclined cutting surface (24) of the first insulator (2), and positioning grooves (242) corresponding to the positioning bosses (241) are formed on the inclined cutting surface (24) of the second insulator (3).

5. The SMA connector applicable to the 0-6 GHz frequency band according to claim 3, characterized in that: Limiting rings (25) are integrally formed on the peripheral walls at the mutually remote ends of the first insulator (2) and the second insulator (3). A rotation stopping surface (251) perpendicular to the end surface of the limiting ring (25) is formed on the limiting ring (25), and limiting grooves (111) adapted to the limiting ring (25) are formed on the inner walls of the first jack (11) and the second jack (12).

6. The SMA connector applicable to the 0-6 GHz frequency band according to claim 1, wherein: The first insulator (2) includes a front end (26), a middle end (27) and a rear end (28) which are integrally formed in sequence. The front end (26) is used for contacting with the second insulator (3). The front end (26) and the rear end (28) have the same outer diameter, and the outer diameter of the middle end (27) is smaller than the outer diameters of the front end (26) and the rear end (28).

7. The SMA connector applicable to the 0-6 GHz frequency band according to claim 6, characterized in that: Exhaust through grooves (261) are formed on the outer walls of the front end (26) and the rear end (28) along the length direction of the first insulator (2).

8. The SMA connector applicable to the 0-6 GHz frequency band according to claim 1, wherein: Annular grooves (22) are formed on the inner walls of the inner hole channels (21) of the first insulator (2) and the second insulator (3), and elastic gaskets (23) are clamped in the annular grooves (22).

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