Ultra-wideband radio frequency coaxial internal and external blocking structure

Abstract

The invention relates to the technical field of radio frequency transmission, in particular to an ultra-wideband radio frequency coaxial internal and external blocking structure. The internal and external blocking structure comprises an outer shell, a first radio frequency mechanism and a second radio frequency mechanism, the first radio frequency mechanism comprises a first radio frequency shell, a first insulating part, a first inner conductor assembly, a threaded sleeve and the like, and the second radio frequency mechanism is coaxially arranged relative to the first radio frequency mechanism. Comprising a second radio frequency shell, a second insulating part, a second inner conductor assembly, a first capacitance part, a second capacitance part and the like, and the first radio frequency shell, the second capacitance part and the second radio frequency shell are matched with the first insulating part and the second insulating part to form a transmission loop with an outer conductor direct current partition. And the first inner conductor assembly, the first capacitor and the second inner conductor assembly are matched with the first insulating part and the second insulating part to form a transmission loop of inner conductor direct current isolation. The protection mode of blocking the direct current of the inner conductor and the outer conductor can be considered at the same time, and the protection performance of the radio frequency coaxial direct current block is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of radio frequency transmission, in particular to an ultra-wideband radio frequency coaxial inner-outer direct-current isolation structure. BACKGROUND

[0002] With the continuous development of the communication industry, the importance of radio frequency and microwave systems is increasingly apparent, and as one of the key passive devices in radio frequency and microwave systems, the demand for radio frequency direct current isolators is also growing in the fields of wireless communication, test and measurement, aerospace, national defense construction, high-frequency scientific research and other engineering applications. At the same time, the requirements for radio frequency and microwave systems are becoming diversified and differentiated, which puts forward more requirements for the development of radio frequency direct current isolators.

[0003] The core concept of a radio frequency direct current isolator is to "block direct current and pass alternating current", and its essence is a high-pass filter with a very low cutoff frequency, which allows radio frequency signals to pass almost without attenuation while blocking direct current components to protect downstream sensitive equipment and improve system performance. The simplest direct current isolator can be realized by connecting a capacitor in series in the signal path, which utilizes the "direct current isolation" characteristic of the capacitor.

[0004] Currently, radio frequency direct current isolators are developing towards high frequency, integration, miniaturization and low power consumption. The application of third-generation semiconductor materials will further improve the power capacity and efficiency of radio frequency direct current isolators. In the field of radio frequency direct current isolators, radio frequency coaxial direct current isolators, as a type of radio frequency direct current isolator, have excellent high-frequency response, wider working frequency, low insertion loss, and a characteristic impedance of 50Ω or 75Ω, which is easy to match the loop of a radio frequency microwave system. By serial connection, installation is simple, and the connection mode can be changed by changing the connection interface. However, on the domestic market, the types of radio frequency coaxial direct current isolators are mostly single protection forms of inner direct current isolation or outer direct current isolation.

[0005] Therefore, how to design an ultra-wideband radio frequency coaxial inner-outer direct current isolation structure that can simultaneously consider the protection form of inner and outer conductor isolation is a technical problem to be solved at present. SUMMARY

[0006] The purpose of the present application is to overcome the above technical problems, and an ultra-wideband radio frequency coaxial inner-outer direct current isolation structure is provided, which can simultaneously consider the protection form of inner and outer conductor isolation and improve the protection performance of the radio frequency coaxial direct current isolator.

[0007] An ultra-wideband radio frequency coaxial inner-outer direct current isolation structure disclosed in the present application specifically adopts the following scheme: An ultra-wideband radio frequency coaxial inner-outer direct current isolation structure comprises an outer shell, a first radio frequency mechanism comprising a first radio frequency shell, a first insulating piece, a first inner conductor assembly and a screw sleeve, one end of the first radio frequency shell is fixed in one end of the outer shell, the first insulating piece is located in the first radio frequency shell, one end of the first inner conductor assembly is located in the first insulating piece, the other end is exposed from the first insulating piece and located in the screw sleeve, and the screw sleeve is sleeved on the other end of the first radio frequency shell away from the outer shell; a second radio frequency mechanism is coaxially arranged relative to the first radio frequency mechanism and comprises a second radio frequency shell, a second insulating piece, a second inner conductor assembly, a first capacitor and a second capacitor, one end of the second radio frequency shell is fixed in the other end of the outer shell relative to the first radio frequency shell, the second insulating piece is located in the second radio frequency shell and one end abuts against the first insulating piece, the second inner conductor assembly is located in the second insulating piece, the first capacitor abuts between the first inner conductor assembly and the second inner conductor assembly, the second capacitor is sleeved on one end of the second insulating piece abutting against the first insulating piece and abuts between the first radio frequency shell and the second radio frequency shell; wherein the first radio frequency shell, the second capacitor and the second radio frequency shell cooperate with the insulation limit of the first insulating piece and the second insulating piece to form a transmission loop for outer conductor direct current isolation; the first inner conductor assembly, the first capacitor and the second inner conductor assembly cooperate with the insulation limit of the first insulating piece and the second insulating piece to constitute a transmission loop for inner conductor direct current isolation.

[0008] By adopting the technical scheme, the first radio frequency mechanism and the second radio frequency mechanism are arranged, and the two are arranged relative to the same coaxial center, one end of the first radio frequency shell in the first radio frequency mechanism is fixed in one end of the outer shell, and one end of the second radio frequency shell of the second radio frequency mechanism is fixed in the other end of the outer shell relative to the first radio frequency shell. This structural layout ensures the stability and coaxiality of the overall structure, and is beneficial to the stable transmission of the radio frequency signal in the frequency band. The first insulating part is located in the first radio frequency shell, and the second insulating part is located in the second radio frequency shell and abuts against the first insulating part, thereby providing an insulating and limiting environment for the inner and outer conductor assemblies. One end of the first inner conductor assembly is located in the first insulating part, the other end is exposed to the first insulating part and located in the screw sleeve, the second inner conductor assembly is located in the second insulating part, the first capacitor part abuts between the first inner conductor assembly and the second inner conductor assembly, and the second capacitor part is sleeved on one end of the second insulating part abutting against the first insulating part and abuts between the first radio frequency shell and the second radio frequency shell. Such arrangement makes the first radio frequency shell, the second capacitor part and the second radio frequency shell cooperate with the insulating and limiting of the first insulating part and the second insulating part, so as to form a transmission loop for the outer conductor direct current interruption, thereby avoiding the direct current interference between the outer conductors. Meanwhile, the first inner conductor assembly, the first capacitor part and the second inner conductor assembly cooperate with the insulating and limiting of the first insulating part and the second insulating part, thereby constituting a transmission loop for the inner conductor direct current interruption, preventing the direct current influence between the inner conductors, and thereby realizing the inner and outer conductor direct current interruption transmission of the ultra-wideband radio frequency signal, effectively improving the quality and stability of the signal transmission, and meeting the requirements of the communication system on the signal transmission in the ultra-wideband frequency band.

[0009] Optionally, the first inner conductor assembly comprises: a first transmission inner conductor, which is arranged in the first insulating part; a first elastic part, which abuts against the first transmission inner conductor away from the screw sleeve; and a first series inner conductor, one end of which is arranged in one end of the first transmission inner conductor and presses the first elastic part, and the other end thereof abuts against one end surface of the first capacitor part through the rebound force of the first elastic part.

[0010] By adopting the technical scheme, the first transmission inner conductor is arranged in the first insulating part, the transmission of the inner conductor signal can be realized, the first elastic part abuts against the first transmission inner conductor, the first series inner conductor presses the first elastic part, and the first series inner conductor abuts against one end surface of the first capacitor part through the rebound force of the first elastic part, thereby ensuring the stable connection between the first inner conductor assembly and the first capacitor part and maintaining the stability of the inner conductor direct current interruption transmission loop.

[0011] Optionally, the second inner conductor assembly comprises: a second transmission inner conductor, which is arranged in the second insulating part; A second elastic member is arranged close to the first capacitor and abuts against the second transmission inner conductor; a second series inner conductor is arranged in the second transmission inner conductor and abuts against the second elastic member at one end and abuts against the other end surface of the first capacitor at the other end through the elastic force of the second elastic member to fix the first capacitor.

[0012] By adopting the above technical scheme, the second transmission inner conductor is arranged in the second insulating member to realize the transmission function of the inner conductor, the second elastic member is arranged close to the first capacitor and abuts against the second transmission inner conductor, the second series inner conductor abuts against the second elastic member at one end and abuts against the other end surface of the first capacitor at the other end through the elastic force, so that the first capacitor can be effectively fixed, the welding design can be avoided, the space can be reduced, and different types of capacitors can be replaced, and the size error of the capacitor can be controlled.

[0013] Optionally, the first transmission inner conductor and the second transmission inner conductor are respectively provided with a boss abutting against the inner wall of the first insulating member and the second insulating member, and one end of the boss is arranged as a plane and the other end is arranged as an inclined surface along the length direction of the first transmission inner conductor or the second transmission inner conductor.

[0014] By adopting the above technical scheme, the boss abutting against the inner wall of the first insulating member and the second insulating member is arranged on the first transmission inner conductor and the second transmission inner conductor, and one end of the boss is arranged as a plane and the other end is arranged as an inclined surface, so that the first transmission inner conductor and the second transmission inner conductor can be stably positioned in the first insulating member and the second insulating member respectively, and the inclined surface facilitates the installation and adjustment of the positions of the first transmission inner conductor and the second transmission inner conductor. In combination with the arrangement of the first transmission inner conductor, the first elastic member, the second transmission inner conductor, the second elastic member and the first capacitor, a transmission loop with inner conductor DC blocking can be formed.

[0015] Optionally, an inner thread is arranged in the outer shell, and an adapted outer thread is arranged on the outer side of the first radio frequency shell and the second radio frequency shell.

[0016] By adopting the above technical scheme, the outer shell, the first radio frequency shell and the second radio frequency shell are connected through the adapted inner and outer threads, so that the first radio frequency mechanism and the second radio frequency mechanism can be stably installed and positioned in the outer shell, and the overall stability and reliability of the ultra-wideband radio frequency coaxial inner and outer DC blocking structure are ensured.

[0017] Optionally, a positioning step is arranged on the inner side of the outer shell, and the first radio frequency shell and the second radio frequency shell are located on the two sides of the positioning step.

[0018] By adopting the technical scheme, the positioning step can play a role of assembling and positioning the first radio frequency shell and the second radio frequency shell, so that the two are accurately installed at corresponding positions in the outer shell, position deviation is avoided, the stability and accuracy of the structure are ensured, and the normal formation of the DC blocking transmission loop of the inner and outer conductors is facilitated.

[0019] Optionally, a plurality of dot holes are arranged on the first radio frequency shell and the second radio frequency shell through a dotting process, and the plurality of dot holes are used for limiting the movement of the first insulating part and the second insulating part respectively.

[0020] By adopting the technical scheme, a plurality of dot holes are arranged on the first radio frequency shell and the second radio frequency shell through a dotting process, the movement of the first insulating part and the second insulating part can be limited respectively, the stability of the first insulating part and the second insulating part at the corresponding positions is ensured, and the normal operation and performance stability of the ultra-wideband radio frequency coaxial inner-outer DC blocking structure are ensured.

[0021] Optionally, an outer thread is arranged on the outer side of the end of the second radio frequency shell away from the first radio frequency shell, and is used for connecting an external component.

[0022] By adopting the technical scheme, the connection of the ultra-wideband radio frequency coaxial inner-outer DC blocking structure and the external component can be realized, the continuity of signal transmission is ensured, the structure can work cooperatively with external equipment, and the use range is expanded.

[0023] Optionally, a groove along is arranged on the end of the second insulating part abutting against the first insulating part, the groove along is used for sleeving a second capacitor, and the groove along abutting against the first insulating part forms a containing space for containing the second capacitor.

[0024] By adopting the technical scheme, the second capacitor is sleeved on the groove along, and the groove along abutting against the first insulating part forms the containing space for containing the second capacitor, so that the second capacitor can be positioned and protected, the second capacitor is stably installed at the abutting position of the first insulating part and the second insulating part, and the stable operation of the DC blocking transmission loop of the outer conductor is ensured.

[0025] Optionally, the outer shell is made of hard insulating material, and the first insulating part and the second insulating part are made of soft insulating material.

[0026] By adopting the technical scheme, the outer shell is made of hard insulating material, so that the stability and overall strength of the structure are ensured, the first insulating part and the second insulating part are made of soft insulating material, so that the installation of each component is better adapted, the close fit is realized, the insulation effect is improved, and the stable operation of the DC blocking transmission loop of the inner and outer conductors is ensured.

[0027] In summary, the present application has at least one of the following beneficial technical effects: 1. The first radio frequency housing, the second capacitor, and the second radio frequency housing, together with the insulation limit of the first insulating component and the second insulating component, form a transmission circuit with DC blocking of the outer conductor. The first inner conductor assembly, the first capacitor, and the second inner conductor assembly, together with the insulation limit of the first insulating component and the second insulating component, constitute a transmission circuit with DC blocking of the inner conductor, thereby achieving protection against both internal and external DC blocking. 2. The first elastic element of the first inner conductor assembly and the second elastic element of the second inner conductor assembly can respectively cause the first series inner conductor and the second series inner conductor to abut against the first capacitor through the rebound force, so as to ensure the connection stability. At the same time, it can eliminate the need for welding design of the capacitor, reduce space, facilitate the replacement of different models of capacitors, and control the dimensional error of the capacitor. 3. The bosses on the first and second series inner conductors can abut against the inner walls of the first and second insulating components, and the combination of a flat end and a beveled end on the bosses helps with installation positioning and structural stability. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an ultra-wideband radio frequency coaxial internal and external DC blocking structure disclosed in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of a partially exploded structure of an ultrawideband radio frequency coaxial internal and external DC blocking structure. Figure 3 for Figure 1 A schematic cross-sectional view of an ultrawideband radio frequency coaxial internal and external DC blocking structure is disclosed. Figure 4 for Figure 1 A fully exploded structural diagram of an ultrawideband radio frequency coaxial internal and external DC blocking structure is disclosed.

[0029] Explanation of reference numerals in the attached figures: 10. Outer shell; 101. Positioning step; 20. First radio frequency mechanism; 201. Dot hole; 21. First radio frequency housing; 211. First embedding groove; 22. First insulating element; 23. First inner conductor assembly; 231. First transmission inner conductor; 2311. Boss; 232. First elastic element; 233. First series inner conductor; 24. Screw sleeve; 241. Second embedding groove; 30. Second radio frequency mechanism; 31. Second radio frequency housing; 32. Second insulating element; 321. Groove edge; 33. Second inner conductor assembly; 331. Second transmission inner conductor; 332. Second elastic element; 333. Second series inner conductor; 34. First capacitor; 35. Second capacitor; 40. Connecting fastener. Detailed Implementation

[0030] The terminology used in the following embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the description of the embodiments of the application and the appended claims, the singular forms "a," "an" and "the" are intended to include both singular and plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used in the description of the embodiments of the application, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0031] Hereinafter, the terms "first", "second" are used only for the purpose of description, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0032] The technical solutions of the embodiments of the present application are described in detail below in conjunction with the drawings.

[0033] Referring to Figure 1 , Figure 2 and Figure 3 , an ultra-wideband radio frequency coaxial inner and outer direct current isolation structure disclosed in the embodiments of the present application includes an outer shell 10, a first radio frequency mechanism 20 and a second radio frequency mechanism 30, wherein the first radio frequency mechanism 20 and the second radio frequency mechanism 30 are arranged relative to the coaxial center, and one end of a first radio frequency shell 21 of the first radio frequency mechanism 20 is fixed in one end of the outer shell 10, and one end of a second radio frequency shell 31 of the second radio frequency mechanism 30 is fixed in the other end of the outer shell 10 relative to the first radio frequency shell 21, achieving the effect of a protective form that simultaneously considers the inner and outer conductor direct current isolation.

[0034] Specifically, the first radio frequency mechanism 20 includes a first radio frequency shell 21, a first insulating part 22, a first inner conductor assembly 23 and a screw sleeve 24, the first insulating part 22 is located in the first radio frequency shell 21, one end of the first inner conductor assembly 23 is located in the first insulating part 22, the other end is exposed to the first insulating part 22 and located in the screw sleeve 24, the screw sleeve 24 is sleeved on the end of the first radio frequency shell 21 away from the outer shell 10, and is used as an input or output port of the ultra-wideband radio frequency coaxial inner and outer direct current isolation structure.

[0035] The first inner conductor assembly 23 comprises a first transmission inner conductor 231, a first elastic member 232 and a first series inner conductor 233. The first transmission inner conductor 231 is arranged in the first insulating member 22. The first elastic member 232 is arranged in the first transmission inner conductor 231 away from the sleeve 24. The first series inner conductor 233 is arranged in one end of the first transmission inner conductor 231 to press the first elastic member 232. The other end of the first series inner conductor 233 is arranged to abut against one end surface of the first capacitor member 34 through the elastic force of the first elastic member 232.

[0036] The outer shell 10 is cylindrical in shape, solid in structure, made of hard insulating material, and has good insulation performance and high hardness. The first radio frequency shell 21 is shown in the structure, made of metal material, such as copper alloy, which has good electrical conductivity and mechanical strength. The first insulating member 22 is cylindrical in shape and is located in the first radio frequency shell 21. It is made of soft insulating material, such as polytetrafluoroethylene, which has good insulation performance and certain toughness, and can well play the role of insulation and buffering. Figure 4

[0037] Referring to Figure 4 , one end of the first transmission inner conductor 231 is a solid metal rod, and the other end is provided with a space for accommodating the first elastic member 232. The material of the first transmission inner conductor 231 can be copper, which has good electrical conductivity. Of course, it is not limited here, and can be selected according to actual needs. The first elastic member 232 is a spring, which cooperates with the pressing of the first series inner conductor 233 to provide elastic force for the first series inner conductor 233, so that the end surface of the first series inner conductor 233 can better contact the first capacitor member 34.

[0038] In order to facilitate the first transmission inner conductor 231 to be arranged and fixed in the first insulating member 22, a boss 2311 is arranged on the first transmission inner conductor 231. One end of the boss 2311 is arranged as a flat surface along the length direction of the first transmission inner conductor 231, and the other end is arranged as an inclined surface. The first insulating member 22 is made of soft insulating material, which can better assemble with the first insulating member 22, and has the functions of facilitating assembly, positioning and stability.

[0039] ​Specifically, the second radio frequency mechanism 30 comprises a second radio frequency shell 31, a second insulating piece 32, a second inner conductor assembly 33, a first capacitor 34 and a second capacitor 35. The second insulating piece 32 is located in the second radio frequency shell 31 and abuts against the first insulating piece 22 at one end. The second inner conductor assembly 33 is located in the second insulating piece 32. The first capacitor 34 is fixed by abutting between the first inner conductor assembly 23 and the second inner conductor assembly 33. The second capacitor 35 is sleeved on the end of the second insulating piece 32 abutting against the first insulating piece 22 and abuts between the first radio frequency shell 21 and the second radio frequency shell 31. The end of the corresponding second insulating piece 32 abutting against the first insulating piece 22 is provided with a groove along 321 for sleeving the second capacitor 35. The groove along 321 abutting against the first insulating piece 22 forms a containing space for containing the second capacitor 35. Here, the first capacitor 34 and the second capacitor 35 use the characteristics of capacitive "direct current through intersection" to block direct current components and allow radio frequency signals to pass through.

[0040] The second inner conductor assembly 33 comprises a second transmission inner conductor 331, a second elastic piece 332 and a second series inner conductor 333. The second transmission inner conductor 331 is provided in the second insulating piece 32. The second elastic piece 332 is close to the first capacitor 34 and abuts in the second transmission inner conductor 331. The second series inner conductor 333 is provided in one end of the second transmission inner conductor 331 to press the second elastic piece 332. The other end of the second series inner conductor 333 abuts the other end surface of the first capacitor 34 through the elastic force of the second elastic piece 332. In combination with the elastic force of the first elastic piece 232, the second series inner conductor 333 abuts the opposite end of the first capacitor 34, which can more stably abut the first capacitor 34. Based on the structure, the capacitors with different size errors can be applied. The ultra-wideband radio frequency coaxial inner and outer direct current isolation structure is convenient to disassemble and assemble to replace parts.

[0041] The second radio frequency shell 31 has an outer shape as shown in Figure 4 The second radio frequency shell 31 has an outer shape as shown in

[0042] At the same time, referring to Figure 4The second transmission inner conductor 331 has one end of a solid metal rod and the other end has a space for accommodating the second elastic member 332. The second transmission inner conductor 331 can be made of copper and has good conductivity. Of course, silver alloy material can also be used to further improve the conductivity. The second elastic member 332 is a spring that cooperates with the second series inner conductor 333 to provide elastic force to the second series inner conductor 333, so that the end surface of the second series inner conductor 333 is in better contact with the first capacitor 34.

[0043] In order to facilitate the second transmission inner conductor 331 to be arranged in the second insulating member 32, a boss 2311 is arranged on the second transmission inner conductor 331. One end of the boss 2311 is arranged as a flat surface along the length direction of the second transmission inner conductor 331, and the other end is arranged as an inclined surface. The second insulating member 32 is made of soft insulating material, so that the second insulating member 32 can be better assembled with the second insulating member 32, and the assembly, positioning and stability are facilitated.

[0044] Therefore, the ultra-wideband radio frequency coaxial inner and outer direct current isolation structure can form a transmission loop for breaking the direct current of the outer conductor by cooperation of the first radio frequency shell 21, the second capacitor 35 and the second radio frequency shell 31 with the insulating limit of the first insulating member 22 and the second insulating member 32. The transmission loop for breaking the direct current of the inner conductor can be formed by cooperation of the first transmission inner conductor 231, the first elastic member 232 and the first series inner conductor 233, the first capacitor 34, the second transmission inner conductor 331, the second elastic member 332 and the second series inner conductor 333 with the insulating limit of the first insulating member 22 and the second insulating member 32.

[0045] Further, referring to Figure 4 In order to facilitate the assembly and firm connection of the overall structure, an internal thread is arranged in the outer shell 10, and an external thread is arranged on the outer side of the first radio frequency shell 21 and the second radio frequency shell 31. The first radio frequency shell 21 and the second radio frequency shell 31 are fixed in the outer shell 10 by the threaded connection, which is convenient to install and firm to connect.

[0046] In order to ensure that the first radio frequency shell 21 and the second radio frequency shell 31 can be accurately installed into the outer shell 10, referring to Figure 3 An positioning step 101 is arranged on the inner side of the outer shell 10. The first radio frequency shell 21 and the second radio frequency shell 31 are located on both sides of the positioning step 101 after assembly, which serves as a positioning function to ensure the accurate relative position of the first radio frequency mechanism 20 and the second radio frequency mechanism 30, and to avoid position deviation caused by threaded rotation fluctuation.

[0047] In order to ensure the position stability of the first insulating part 22 and the second insulating part 32, in the embodiment, after the first radio frequency mechanism 20 and the second radio frequency mechanism 30 are assembled, the first radio frequency shell 21 and the second radio frequency shell 31 are marked by using a marking process, and a plurality of dot holes 201 are formed, which can limit the displacement of the first insulating part 22 in the first radio frequency shell 21 and the second insulating part 32 in the second radio frequency shell 31, and affect the direct current blocking effect.

[0048] In order to strengthen the connection stability between the first radio frequency shell 21 and the screw sleeve 24, the ultra-wideband radio frequency coaxial inner-outer direct current blocking structure further comprises a connecting fastener 40 located between the first radio frequency shell 21 and the screw sleeve 24, and the first radio frequency shell 21 is provided with a first embedded groove 211 at the end away from the second radio frequency shell 31, and the screw sleeve 24 is provided with a second embedded groove 241.

[0049] The connecting fastener 40 is a C-shaped ring with resilience, which is installed in the first embedded groove 211 and the second embedded groove 241, and can play a role in connecting and fixing the first radio frequency shell 21 and the screw sleeve 24, thereby ensuring the stability of the connection.

[0050] In addition, the end of the second radio frequency shell 31 away from the first radio frequency shell 21 is used as an input or output port of the ultra-wideband radio frequency coaxial inner-outer direct current blocking structure, and is provided with external threads on the outside for connecting an external source connector, thereby facilitating the connection with other devices.

[0051] The implementation principle of the embodiment is that: by setting the first radio frequency shell 21, the second capacitor 35, the second radio frequency shell 31, and the first insulating part 22 and the second insulating part 32, an outer conductor direct current blocking transmission loop is formed; by setting the first inner conductor assembly 23, the first capacitor 34, the second inner conductor assembly 33, and the first insulating part 22 and the second insulating part 32, an inner conductor direct current blocking transmission loop is formed, so as to realize the inner-outer conductor direct current blocking, and give consideration to the inner conductor direct current blocking and outer conductor direct current blocking protection, and at the same time, the damage protection capability of the abnormal arterial pulse power signal of the input end of the precision radio frequency instrument can be improved; the first elastic member 232 of the first inner conductor assembly 23 and the second elastic member 332 of the second inner conductor assembly 33 generate a resilient force, so that the first series inner conductor 233 and the second series inner conductor 333 abut against the first capacitor 34, thereby ensuring the connection stability, and without welding the capacitor, the occupied space of the capacitor can be reduced, the replacement of capacitors of different sizes is facilitated, and the size error of the capacitor is controlled; the boss 2311 on the first series inner conductor 233 and the second series inner conductor 333 abuts against the inner wall of the first insulating part 22 and the second insulating part 32, and one end of the boss 2311 is a flat surface and the other end is an inclined surface, which is beneficial to installation and positioning, and the structure is stable; in addition, the connection mode between the components, such as threaded connection and C-shaped ring connection, ensures the stability and reliability of the structure, and improves the service life and use effect of the product.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An ultra-wideband radio frequency coaxial inner-outer DC blocking structure, characterized in that, The utility model relates to a coaxial connector, which comprises: an outer shell (10); a first radio frequency mechanism (20) comprising a first radio frequency shell (21), a first insulating part (22), a first inner conductor assembly (23) and a screw sleeve (24), one end of the first radio frequency shell (21) being fixed in one end of the outer shell (10), the first insulating part (22) being located in the first radio frequency shell (21), one end of the first inner conductor assembly (23) being located in the first insulating part (22) and the other end being exposed from the first insulating part (22) and located in the screw sleeve (24), the screw sleeve (24) being sleeved on the other end of the first radio frequency shell (21) away from the outer shell (10); a second radio frequency mechanism (30) coaxially arranged relative to the first radio frequency mechanism (20) and comprising a second radio frequency shell (31), a second insulating part (32), a second inner conductor assembly (33), a first capacitor (34) and a second capacitor (35), one end of the second radio frequency shell (31) being fixed in the other end of the outer shell (10) relative to the first radio frequency shell (21), the second insulating part (32) being located in the second radio frequency shell (31) and abutting against the first insulating part (22) at one end, the second inner conductor assembly (33) being located in the second insulating part (32), the first capacitor (34) abutting between the first inner conductor assembly (23) and the second inner conductor assembly (33), and the second capacitor (35) being sleeved on one end of the second insulating part (32) abutting against the first insulating part (22) and abutting between the first radio frequency shell (21) and the second radio frequency shell (31); wherein the first radio frequency shell (21), the second capacitor (35) and the second radio frequency shell (31) cooperate with the insulating limit of the first insulating part (22) and the second insulating part (32) to form a transmission loop of outer conductor DC isolation, and the first inner conductor assembly (23), the first capacitor (34) and the second inner conductor assembly (33) cooperate with the insulating limit of the first insulating part (22) and the second insulating part (32) to form a transmission loop of inner conductor DC isolation.

2. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 1, wherein, The first inner conductor assembly (23) comprises: a first transmission inner conductor (231) penetrating in the first insulating part (22); a first elastic part (232) abutting in the first transmission inner conductor (231) away from the screw sleeve (24); a first series inner conductor (233) penetrating in one end of the first transmission inner conductor (231) to press the first elastic part (232) at one end and abutting one end face of the first capacitor (34) through the rebound force of the first elastic part (232) at the other end.

3. The ultra-wideband radio frequency coaxial inner-outer DC blocking structure of claim 2, wherein, The second inner conductor assembly (33) comprises: a second transmission inner conductor (331) penetrating in the second insulating part (32); a second elastic part (332) abutting in the second transmission inner conductor (331) close to the first capacitor (34); A second series inner conductor (333) is arranged in the first end of the second transmission inner conductor (331) and abuts against the second elastic member (332) at one end, and abuts against the other end surface of the first capacitor member (34) at the other end through the elastic force of the second elastic member (332) to fix the first capacitor member (34).

4. The ultra-wideband radio frequency coaxial inner-outer DC blocking structure of claim 3, wherein, The first transmission inner conductor (231) and the second transmission inner conductor (331) are respectively provided with a boss (2311) abutting against the inner wall of the first insulating member (22) and the second insulating member (32), and the boss (2311) is provided with a flat surface at one end along the length direction of the first transmission inner conductor (231) or the second transmission inner conductor (331), and is provided with an inclined surface at the other end.

5. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 1, wherein, The outer shell (10) is provided with an inner thread, and the first radio frequency shell (21) and the second radio frequency shell (31) are provided with an adapted outer thread.

6. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 1, wherein, The outer shell (10) is provided with a positioning step (101) on the inner side, and the first radio frequency shell (21) and the second radio frequency shell (31) are located on both sides of the positioning step (101).

7. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 6, wherein, The first radio frequency shell (21) and the second radio frequency shell (31) are provided with a plurality of dot holes (201) through the dotting process, and the plurality of dot holes (201) are used to limit the movement of the first insulating member (22) and the second insulating member (32) respectively.

8. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 5, wherein, The second radio frequency shell (31) is provided with an outer thread on the outer side of the end away from the first radio frequency shell (21) for connecting with an external component.

9. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 5, wherein, The second insulating member (32) is provided with a groove (321) for sleeving a second capacitor member (35) at one end abutting against the first insulating member (22), and the groove (321) abuts against the first insulating member (22) to form a containing space for containing the second capacitor member (35).

10. The ultra-wideband radio frequency coaxial inner outer DC blocking structure of claim 1, wherein, The outer shell (10) is made of hard insulating material; The first insulating member (22) and the second insulating member (32) are made of soft insulating material.

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