阅读说明：本技术 直流交流隔断器以及微波有源电路 (Direct current and alternating current breaker and microwave active circuit ) 是由 冯玉玲 于 2020-11-30 设计创作，主要内容包括：本发明提供一种直流交流隔断器以及微波有源电路,该直流交流隔断器的第一地壳体与第二地壳体相对设置；同轴连接器的第一同轴连接器设置在第一地壳体上,第二同轴连接器设置在第二地壳体上,第一同轴连接器与第二同轴连接器通过第一隔直电容连接；第一地壳体朝向第二地壳体的一端凹陷形成凹槽,第二地壳体与第一地壳体相对的一侧凸出形成凸起,凸起嵌入凹槽内,凸起与凹槽间隔设置形成扼流结构,扼流结构的长度为直流交流隔断器的四分之一工作波长的奇数倍。本发明能够增加第一地壳体与第二地壳体之间的相对面积,提高了隔断器的功率容量和耐压值,并抑制了电磁场在地壳体内的传输,有效提高了隔断器的电磁屏蔽性能,解决了电磁泄漏的问题。(The invention provides a direct current and alternating current breaker and a microwave active circuit, wherein a first ground shell and a second ground shell of the direct current and alternating current breaker are arranged oppositely; the first coaxial connector of the coaxial connector is arranged on the first ground shell, the second coaxial connector is arranged on the second ground shell, and the first coaxial connector and the second coaxial connector are connected through a first blocking capacitor; the first ground casing is sunken to form the recess towards the one end of second ground casing, and the one side protrusion that second ground casing and first ground casing are relative forms the arch, and in the protruding embedding recess, protruding and recess interval set up and form the choke structure, and the length of choke structure is the odd number multiple of the quarter operating wavelength of direct current alternating current breaker. The invention can increase the relative area between the first ground shell and the second ground shell, improve the power capacity and the pressure resistance value of the isolator, inhibit the transmission of an electromagnetic field in the ground shell, effectively improve the electromagnetic shielding performance of the isolator and solve the problem of electromagnetic leakage.)

1. A DC AC block, comprising: the coaxial connector comprises a coaxial connector, a first ground shell and a second ground shell, wherein the first ground shell and the second ground shell are arranged oppositely;

the coaxial connector comprises a first coaxial connector and a second coaxial connector, the first coaxial connector is arranged on the first ground shell, the second coaxial connector is arranged on the second ground shell, and the first coaxial connector and the second coaxial connector are connected through a first blocking capacitor;

first ground casing orientation the sunken recess that forms in one end of second ground casing, second ground casing with the protruding arch that forms in one side that first ground casing is relative, protruding embedding in the recess, protruding with the recess interval sets up and forms the choke structure, the length of choke structure does the odd number multiple of the quarter operating wavelength of direct current alternating current breaker.

2. The dc/ac block of claim 1, wherein the first and second coaxial connectors are fixed to the first and second ground housings by screws, respectively.

3. The DC/AC block of claim 1, wherein the choke structure comprises a second blocking capacitor circumferentially disposed along the protrusion, and both ends of the second blocking capacitor are connected to the first and second ground housings, respectively.

4. The DC/AC breaker of claim 3, wherein the first DC blocking capacitor and the second DC blocking capacitor are lumped capacitive elements.

5. The DC/AC breaker of claim 3, wherein the DC/AC breaker comprises a resilient conductive member disposed across the first and second DC blocking capacitors.

6. The dc/ac block circuit of claim 5, wherein the resilient conductive member comprises any one of conductive rubber, conductive reed.

7. The dc/ac block of claim 1, wherein the first coaxial connector and the second coaxial connector each comprise an inner conductor, the inner conductor of the first coaxial connector and the inner conductor of the second coaxial connector being connected by the first dc blocking capacitor.

8. The dc/ac block of claim 7, wherein the inner conductor of the first coaxial connector extends through the first ground housing into the recess; the bulge of the second ground shell forms a through hole in a hollow mode, and the inner conductor of the second coaxial connector is arranged in the through hole and is opposite to the inner conductor, extending into the groove, of the first coaxial connector.

9. The dc/ac block of claim 1, wherein the choke structure further comprises an insulator disposed around the protrusion and having two sides connected to the first and second ground housings, respectively.

10. A microwave active circuit, characterized in that it comprises a dc-ac breaker according to any of claims 1-9.

Technical Field

The invention relates to the technical field of breakers, in particular to a direct current and alternating current breaker and a microwave active circuit.

Background

At present, the breaker can block direct current and alternating current low frequency signals, does not influence the transmission of radio frequency signals simultaneously, is the essential component of microwave active circuit. The prior art breakers usually achieve the function of blocking the dc path by separating the inner and outer conductors, but such a method has the following disadvantages: (1) the power capacity is small, and the microwave transmission device cannot be applied to high-power and low-loss microwave transmission; (2) the problem of arc discharge caused by breakdown of air and other media in high-voltage application cannot be effectively solved due to low withstand voltage value; (3) without a shielding structure, there is a problem of electromagnetic leakage.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a direct current alternating current breaker and a microwave active circuit, wherein grooves and protrusions are respectively arranged on a first ground shell and a second ground shell, the first ground shell is opposite to the second ground shell through the protrusion being embedded into the grooves, a choke structure is formed between the first ground shell and the second ground shell, the length of the choke structure is odd times of a quarter of an operating wavelength, the relative area between the first ground shell and the second ground shell can be increased, the power capacity and the withstand voltage value of the breaker are improved, the transmission of an electromagnetic field in the ground shells is inhibited by arranging the choke structure, the electromagnetic shielding performance of the breaker is effectively improved, and the problem of electromagnetic leakage is solved.

In order to solve the above problems, the present invention adopts a technical solution as follows: a dc ac block, the dc ac block comprising: the coaxial connector comprises a coaxial connector, a first ground shell and a second ground shell, wherein the first ground shell and the second ground shell are arranged oppositely; the coaxial connector comprises a first coaxial connector and a second coaxial connector, the first coaxial connector is arranged on the first ground shell, the second coaxial connector is arranged on the second ground shell, and the first coaxial connector and the second coaxial connector are connected through a first blocking capacitor; first ground casing orientation the sunken recess that forms in one end of second ground casing, second ground casing with the protruding arch that forms in one side that first ground casing is relative, protruding embedding in the recess, protruding with the recess interval sets up and forms the choke structure, the length of choke structure does the odd number multiple of the quarter operating wavelength of direct current alternating current breaker.

Further, the first coaxial connector and the second coaxial connector are respectively fixed on the first ground shell and the second ground shell through screws.

Further, choke structure includes second blocking electric capacity, second blocking electric capacity follows protruding circumference sets up, and both ends respectively with first ground casing, second ground casing are connected.

Further, the first blocking capacitor and the second blocking capacitor are lumped capacitive elements.

Further, the direct current and alternating current breaker comprises an elastic conductive component, and the elastic conductive component is arranged at two ends of the first blocking capacitor and the second blocking capacitor.

Further, the elastic conductive member includes any one of conductive rubber, a conductive reed.

Further, the first coaxial connector and the second coaxial connector both comprise inner conductors, and the inner conductors of the first coaxial connector and the second coaxial connector are connected through the first blocking capacitor.

Further, the inner conductor of the first coaxial connector extends through the first ground shell into the groove; the bulge of the second ground shell forms a through hole in a hollow mode, and the inner conductor of the second coaxial connector is arranged in the through hole and is opposite to the inner conductor, extending into the groove, of the first coaxial connector.

Further, the choke structure also comprises an insulator, wherein the insulator is arranged around the protrusion, and two sides of the insulator are respectively connected with the first ground shell and the second ground shell.

Based on the same inventive concept, the invention also provides a microwave active circuit, which comprises the direct current and alternating current breaker.

Compared with the prior art, the invention has the beneficial effects that: set up recess and arch on first ground casing and second ground casing respectively, it is relative with second ground casing to make first ground casing through protruding embedding recess, and form the structure of choking between first ground casing, second ground casing, the length that makes the structure of choking is the odd number multiple of quarter operating wavelength, can increase the relative area between first ground casing and the second ground casing, the power capacity and the withstand voltage value of breaker have been improved, and the mode through setting up the structure of choking has restrained the transmission of electromagnetic field in ground casing, the electromagnetic shielding performance of breaker has effectively been improved, the problem of electromagnetic leakage has been solved.

Drawings

Fig. 1 is a flow chart of an embodiment of a dc-ac block according to the present invention;

FIG. 2 is a cross-sectional view of an embodiment of a DC/AC block of the present invention;

FIG. 3 is a schematic diagram of an embodiment of a DC/AC block for suppressing electromagnetic leakage according to the present invention;

fig. 4 is a structural diagram of an embodiment of a microwave active circuit according to the present invention.

In the figure: 1. a first coaxial connector; 2. a second coaxial connector; 3. a first ground housing; 4. a second ground housing; 5. an insulator; 6. a first blocking capacitor; 7. and a second blocking capacitor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Referring to fig. 1, 2 and 3, wherein fig. 1 is a flow chart of an embodiment of a dc/ac isolator according to the present invention; FIG. 2 is a cross-sectional view of an embodiment of a DC/AC block of the present invention; fig. 3 is a schematic diagram of an embodiment of a dc/ac block for suppressing electromagnetic leakage according to the present invention, wherein fig. 2 is a cross-sectional view of the dc/ac block of fig. 1 taken along an axial direction of a first coaxial connector and a second coaxial connector. The dc/ac breaker of the present invention will be described in detail with reference to fig. 1 to 3.

In the present embodiment, the dc/ac block device includes: the coaxial connector comprises a coaxial connector, a first ground shell 3 and a second ground shell 4, wherein the first ground shell 3 and the second ground shell 4 are arranged oppositely; the coaxial connector comprises a first coaxial connector 1 and a second coaxial connector 2, the first coaxial connector 1 is arranged on a first ground shell 3, the second coaxial connector 2 is arranged on a second ground shell 4, and the first coaxial connector 1 and the second coaxial connector 2 are connected through a first blocking capacitor 6; the first ground casing 3 is sunken towards the one end of second ground casing 4 and is formed the recess, and second ground casing 4 forms the arch with the one side protrusion that first ground casing 3 is relative, and in the protruding embedding recess, protruding and recess interval set up and form the choke structure, and the length of choke structure is the odd number multiple of the quarter operating wavelength of direct current alternating current breaker.

In the present embodiment, the relative area between the first and second ground housings 3 and 4 is increased by fitting the protrusions into the grooves, the withstand voltage of the dc/ac isolator is increased, and the power loss is reduced by the electromagnetic leakage suppression characteristic of the choke structure.

In a specific embodiment, the direct current and alternating current breaker can bear alternating current AC4000V and DC 4500V, and meets the requirements of medical and other high-voltage fields.

In this embodiment, the first and second ground housings 3 and 4 are cylindrical, and in other embodiments, the first and second ground housings 3 and 4 may also be prismatic, square, or other shapes, which are not limited herein.

In this embodiment, the top of the protrusion is parallel to the bottom of the groove, the outer side is parallel to the inner wall of the groove, and the surrounding protrusion on the second ground shell 4 is parallel to the end of the groove facing the second ground shell 4.

In other embodiments, in order to increase the relative area between the first and second ground housings 3 and 4, the side of the choke structure opposite to each other between the first and second ground housings 3 and 4 may also be a corrugated surface structure or a plurality of gentle protrusions.

In the present embodiment, the first coaxial connector 1 and the second coaxial connector 2 are fixed to the first ground housing 3 and the second ground housing 4 by screws, respectively, and in other embodiments, the first coaxial connector 1 and the second coaxial connector 2 may also be fixed to the first ground housing 3 and the second ground housing 4 by snapping, screwing, welding, and other methods.

In this embodiment, the first dc blocking capacitor 6 is a signal line dc blocking capacitor, and the first coaxial connector 1 and the second coaxial connector 2 can be connected by one or more signal line dc blocking capacitors, so as to adjust the working frequency and the insertion loss through the cooperation of the signal line dc blocking capacitors. And selecting a capacitance value of the capacitor and a signal line blocking capacitor with a proper capacitor packaging size according to the requirements of withstand voltage and power capacity.

In this embodiment, the choke structure includes a second blocking capacitor 7, the second blocking capacitor 7 is disposed along the circumferential direction of the protrusion, and two ends of the second blocking capacitor are connected to the first ground housing 3 and the second ground housing 4, respectively. The second dc blocking capacitor 7 is a ground line dc blocking capacitor.

In the embodiment, in order to facilitate the processing and assembly of the isolator, the first blocking capacitor 6 and the second blocking capacitor 7 are lumped capacitor elements, and the first coaxial connector 1 and the second coaxial connector 2 are standard coaxial connectors, so that the isolator has a simple overall structure, is easy to process, and reduces the difficulty of assembly.

In the present embodiment, in order to ensure the stability of the installation, the dc/ac block device includes an elastic conductive member disposed across the first dc blocking capacitor 6 and the second dc blocking capacitor 7. The first dc blocking capacitor 6 and the second dc blocking capacitor 7 are connected to the first ground case 3 and the second ground case 4 through an elastic conductive member.

In the present embodiment, the elastic conductive member includes any one of conductive rubber and a conductive reed. In other embodiments, the resilient conductive member further comprises a conductive spring, conductive foam, and other resilient materials capable of conducting electricity.

In the present embodiment, the first coaxial connector 1 and the second coaxial connector 2 each include an inner conductor, and the inner conductor of the first coaxial connector 1 and the inner conductor of the second coaxial connector 2 are connected by the first dc blocking capacitor 6. Wherein, the inner conductor of the first coaxial connector 1 extends into the groove through the first ground shell 3; the protrusion of the second ground housing 4 is hollow to form a through hole, and the inner conductor of the second coaxial connector 2 is arranged in the through hole and is opposite to the inner conductor of the first coaxial connector 1 extending into the groove.

In the present embodiment, the choke structure further includes an insulator 5, the insulator 5 is disposed around the protrusion on the second ground housing 4, and both sides of the insulator are connected to the first ground housing 3 and the second ground housing 4, respectively.

In the present embodiment, the insulator 5 may fill the gap between the first and second ground cases 3 and 4, or may be provided outside the second dc blocking capacitor 7.

In this embodiment, the insulator 5 is provided with a mounting hole along the circumferential direction of the protrusion, the second dc blocking capacitor 7 is placed in the mounting hole, and the capacitive coupling between the first and second ground housings 3 and 4 of the two coaxial connectors is realized by the second dc blocking capacitor 7.

The first and second ground housings 3 and 4 of the dc/ac isolator of the present invention are coupled by a choke structure, as shown in fig. 3 (the area where the arrow is located is the choke structure, the microwave transmitted by the isolator leaks outwards, propagates in the direction of the arrow, and is continuously reduced during the transmission). The overall length of the choke structure is approximately an odd multiple of the operating wavelength of 1/4. The structure can effectively improve the electromagnetic shielding performance and reduce the electromagnetic leakage value. With reference to electromagnetic simulation, it can be found that the electromagnetic field is suppressed after passing through the choke structure, and the leakage electric field strength is reduced by about 2 orders of magnitude compared with the conventional breaker.

Through adjusting lumped capacitance element parameters, the indexes of the DC/AC isolator such as working frequency, insertion loss and the like can be flexibly optimized. In the embodiment, the working frequency band of the breaker is adjusted to be 2.4-2.5 GHz, the in-band reflection is less than-20 dB, and the in-band insertion loss is less than 0.2 dB. Can meet the medical application of ultrahigh pressure and high power radio frequency under extremely low power loss.

Has the advantages that: the direct current alternating current breaker is characterized in that the first ground shell and the second ground shell are respectively provided with the groove and the protrusion, the protrusion is embedded into the groove to enable the first ground shell to be opposite to the second ground shell, the choking structure is formed between the first ground shell and the second ground shell, the length of the choking structure is odd times of a quarter of working wavelength, the opposite area between the first ground shell and the second ground shell can be increased, the power capacity and the withstand voltage value of the breaker are improved, the transmission of an electromagnetic field in the ground shells is restrained by the choking structure, the electromagnetic shielding performance of the breaker is effectively improved, and the problem of electromagnetic leakage is solved.

Based on the same inventive concept, the present invention further provides a microwave active circuit, please refer to fig. 4, fig. 4 is a structural diagram of an embodiment of the microwave active circuit of the present invention, and the microwave active circuit of the present invention is further explained with reference to fig. 4.

In the present embodiment, the dc/ac block device includes: the coaxial connector comprises a coaxial connector, a first ground shell and a second ground shell, wherein the first ground shell and the second ground shell are oppositely arranged; the coaxial connector comprises a first coaxial connector and a second coaxial connector, the first coaxial connector is arranged on the first ground shell, the second coaxial connector is arranged on the second ground shell, and the first coaxial connector and the second coaxial connector are connected through a first blocking capacitor; the first ground casing is sunken to form the recess towards the one end of second ground casing, and the one side protrusion that second ground casing and first ground casing are relative forms the arch, and in the protruding embedding recess, protruding and recess interval set up and form the choke structure, and the length of choke structure is the odd number multiple of the quarter operating wavelength of direct current alternating current breaker.

In the embodiment, the relative area between the first ground shell and the second ground shell is increased by embedding the protrusion into the groove, the voltage resistance value of the direct current and alternating current breaker is improved, and the power loss is reduced by utilizing the electromagnetic leakage inhibiting characteristic of the choke structure.

In a specific embodiment, the direct current and alternating current breaker can bear alternating current AC4000V and DC 4500V, and meets the requirements of medical and other high-voltage fields.

In this embodiment, the first and second ground housings are cylindrical, and in other embodiments, the first and second ground housings may also be prismatic, square, or other shapes, which is not limited herein.

In this embodiment, the top of the protrusion is parallel to the bottom of the groove, the outer side of the protrusion is parallel to the inner wall of the groove, and the surrounding protrusion platform on the second ground shell is parallel to one end of the groove facing the second ground shell.

In other embodiments, in order to increase the relative area between the first and second ground housings, the opposite side between the first and second ground housings, i.e., the surface of the choke structure, may also be a corrugated surface structure or a plurality of gentle protrusions.

In this embodiment, the first coaxial connector and the second coaxial connector are fixed on the first ground shell and the second ground shell respectively through screws, and in other embodiments, the first coaxial connector and the second coaxial connector can also be fixed on the first ground shell and the second ground shell through clamping, screwing, welding and other modes.

In this embodiment, the first blocking capacitor is a signal line blocking capacitor, the first coaxial connector and the second coaxial connector can be connected by one or more signal line blocking capacitors, and the adjustment of the working frequency, the insertion loss and other indexes is realized by the cooperation of the signal line blocking capacitors. And selecting a capacitance value of the capacitor and a signal line blocking capacitor with a proper capacitor packaging size according to the requirements of withstand voltage and power capacity.

In this embodiment, the choke structure includes a second blocking capacitor, the second blocking capacitor is disposed along the circumferential direction of the protrusion, and two ends of the second blocking capacitor are respectively connected to the first ground housing and the second ground housing. And the second blocking capacitor is a ground wire blocking capacitor.

In the embodiment, in order to facilitate the processing and assembly of the isolator, the first blocking capacitor and the second blocking capacitor are lumped capacitor elements, and the first coaxial connector and the second coaxial connector are standard coaxial connectors, so that the isolator is simple in overall structure and easy to process, and the difficulty in assembly is reduced.

In this embodiment, in order to ensure the stability of installation, the dc/ac breaker includes an elastic conductive member disposed at both ends of the first dc blocking capacitor and the second dc blocking capacitor. The first blocking capacitor and the second blocking capacitor are connected with the first ground shell and the second ground shell through the elastic conductive component.

In the present embodiment, the elastic conductive member includes any one of conductive rubber and a conductive reed. In other embodiments, the resilient conductive member further comprises a conductive spring, conductive foam, and other resilient materials capable of conducting electricity.

In this embodiment, the first coaxial connector and the second coaxial connector each include an inner conductor, and the inner conductor of the first coaxial connector and the inner conductor of the second coaxial connector are connected through the first dc blocking capacitor. The inner conductor of the first coaxial connector penetrates through the first ground shell and extends into the groove; the protrusion of the second ground shell forms a through hole in a hollow mode, and the inner conductor edge of the second coaxial connector is arranged in the through hole and is opposite to the inner conductor extending into the groove from the first coaxial connector.

In this embodiment, the choke structure further includes an insulator disposed around the protrusion on the second ground shell, and both sides of the insulator are connected to the first ground shell and the second ground shell, respectively.

In this embodiment, the insulator may fill a gap between the first ground case and the second ground case, or may be disposed outside the second dc blocking capacitor.

In this embodiment, the insulator is provided with a mounting hole along the circumferential direction of the protrusion, the second dc blocking capacitor is placed in the mounting hole, and the capacitive coupling between the first and second ground housings of the two coaxial connectors is realized by the second dc blocking capacitor.

The first ground shell and the second ground shell of the direct current and alternating current breaker are matched by adopting a choke structure, and the choke structure is shown as figure 3 (the area where an arrow is positioned is the choke structure, microwaves transmitted by the breaker leak outwards, propagate along the direction of the arrow and are continuously reduced in the transmission process). The overall length of the choke structure is approximately an odd multiple of the operating wavelength of 1/4. The structure can effectively improve the electromagnetic shielding performance and reduce the electromagnetic leakage value. With reference to electromagnetic simulation, it can be found that the electromagnetic field is suppressed after passing through the choke structure, and the leakage electric field strength is reduced by about 2 orders of magnitude compared with the conventional breaker.

Through adjusting lumped capacitance element parameters, the indexes of the DC/AC isolator such as working frequency, insertion loss and the like can be flexibly optimized. In the embodiment, the working frequency band of the breaker is adjusted to be 2.4-2.5 GHz, the in-band reflection is less than-20 dB, and the in-band insertion loss is less than 0.2 dB. Can meet the medical application of ultrahigh pressure and high power radio frequency under extremely low power loss.

Has the advantages that: the microwave active circuit is characterized in that the first ground shell and the second ground shell of the direct current alternating current breaker are respectively provided with the groove and the protrusion, the first ground shell is opposite to the second ground shell by embedding the protrusion into the groove, and the choke structure is formed between the first ground shell and the second ground shell, so that the length of the choke structure is odd times of a quarter of the working wavelength, the relative area between the first ground shell and the second ground shell can be increased, the power capacity and the withstand voltage value of the breaker are improved, the transmission of an electromagnetic field in the ground shells is inhibited by arranging the choke structure, the electromagnetic shielding performance of the breaker is effectively improved, and the problem of electromagnetic leakage is solved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.