CN111370952A - Signal connection device with micro-discharge inhibiting function - Google Patents
Signal connection device with micro-discharge inhibiting function Download PDFInfo
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- CN111370952A CN111370952A CN202010223218.9A CN202010223218A CN111370952A CN 111370952 A CN111370952 A CN 111370952A CN 202010223218 A CN202010223218 A CN 202010223218A CN 111370952 A CN111370952 A CN 111370952A
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- connector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
- H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/04—Fixed joints
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- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The invention relates to the technical field of signal transmission, in particular to a microwave signal transmission technology. The invention discloses a signal connecting device with a micro-discharge inhibiting function, which comprises a microwave connector and is characterized in that the microwave connector is arranged in a magnetic field generator. The microwave connector is arranged in the magnetic field generator, and the stress condition of the charged particles in the inner area of the microwave connector is changed by using the external magnetic field, so that the motion trail of the particles is changed, the acceleration time of the particles in the microwave field is shortened, the kinetic energy of the particles when the particles impact the wall of the device is reduced, and the probability of secondary electron excitation is reduced. The invention can improve the power threshold of the coaxial connector and ensure the normal work of the coaxial connector in a space environment. The microwave connector is particularly suitable for being used for the special microwave connector of the space equipment, because the space equipment usually works in a vacuum state, such as a satellite, a high-altitude aircraft and the like, micro discharge is more easily formed, and the technical scheme of the invention has practical significance.
Description
Technical Field
The invention relates to the technical field of signal transmission, in particular to a microwave signal transmission technology, and particularly relates to a signal connection device with a micro-discharge inhibition function.
Background
Microdischarge is a resonant discharge phenomenon that occurs between two metal surfaces or on the surface of a single dielectric. The micro-discharge is generally formed by electrons that are excited by a microwave electric field transmitted in the component, accelerated in the microwave electric field to obtain energy, and then collide with the surface of the medium to generate secondary electrons. Especially under vacuum conditions.
The conditions under which the microdischarge occurs differ depending on the type of microdischarge. For micro-discharge between metal surfaces, the conditions are: the electron mean free path must be greater than the gap distance between the two metal surfaces and the electron mean transit time between the two surfaces must be an odd multiple of the half period of the microwave electric field. In the case of micro-discharge on a single surface of a medium, the dc electric field generated by the surface charge of the medium must accelerate electrons back to the surface of the medium, so that secondary electrons can be generated.
Electrons are accelerated under the action of a microwave electric field to obtain energy, secondary electrons are generated by impacting the surface of a component and are circularly reciprocated, so that the exponential increase of the number of the electrons is caused, namely the multiplication effect of the secondary electrons. The micro-discharge phenomenon may affect the working performance of the components, and even damage the components, so that the system may not operate normally.
At present, high-power microwave transmission is widely adopted in a space microwave system. Due to the micro-discharge phenomenon, the power capacity of a spatial microwave component is often lower than the power threshold of the same microwave component in a ground environment. The microwave component works in a space environment, and needs to prevent micro-discharge as much as possible and improve the microwave power threshold.
The microwave coaxial connector is widely applied to the fields of communication, aerospace, military and the like, is an important connecting component in a microwave system, provides stable mechanical connection between cables, circuits or between cables and circuits, ensures a good electromagnetic transmission environment at the connecting part, and stably transmits electromagnetic waves.
The microwave power capacity of the system is a bottleneck, and micro-discharge is very easy to occur.
In order to ensure normal operation in a space environment and reduce the risk of micro-discharge, each part of a microwave system needs higher power capacity, and a coaxial connector is often the bottleneck of the power capacity of the system. Because of the structural discontinuity that usually exists at the coaxial joint, it is possible to cause the electromagnetic field change in the component, influence the electron motion in the vacuum, thus influence the power capacity of the component, increase the risk of microdischarge.
Therefore, it is necessary to take measures to improve the power capacity of the coaxial connector and ensure that the coaxial connector can work normally in a space environment.
Disclosure of Invention
The invention mainly aims to provide a signal connecting device with a micro-discharge inhibiting function, which solves the micro-discharge problem of a microwave connector and improves the power capacity and reliability of the signal connecting device.
In order to achieve the above object, according to an aspect of an embodiment of the present invention, there is provided a signal connection device having a microdischarge suppression function, including a microwave connector, characterized in that the microwave connector is disposed in a magnetic field generator.
The microwave connector is arranged in the magnetic field generator, and the stress condition of the charged particles in the inner area of the microwave connector is changed by using the external magnetic field, so that the motion trail of the particles is changed, the acceleration time of the particles in the microwave field is shortened, the kinetic energy of the particles when the particles impact the wall of the device is reduced, and the probability of secondary electron excitation is reduced.
In certain embodiments, the magnetic field generator is comprised of a permanent magnet.
In some embodiments, the magnetic field generator is comprised of an electromagnet.
In the present invention, the magnetic field generator may be constituted by a permanent magnet or an electromagnet. The permanent magnet has the advantages of simple structure and low cost; the electromagnet has the advantages of adjustable and controllable magnetic field intensity.
In certain embodiments, the microwave connector is a space equipment specific microwave connector.
Space equipment such as a satellite, a space shuttle and the like generally work in a vacuum environment, and a microwave connector is easier to generate secondary electron emission to form micro discharge, so the technical scheme of the invention is particularly suitable for inhibiting the micro discharge.
In certain embodiments, the microwave connector is a coaxial connector.
In certain embodiments, the magnetic field generator is comprised of an annular permanent magnet.
In certain embodiments, the annular permanent magnet is coaxial with the coaxial line connector.
In some embodiments, the magnetic field generator is comprised of a solenoid and its excitation power supply.
In certain embodiments, the solenoid is coaxial with the coaxial connector.
The coaxial connector is a microwave connector with wide application, is mainly used for connecting coaxial transmission lines, has a cylindrical shape, and is very suitable for adopting an annular permanent magnet and a cylindrical electromagnet (solenoid) as a magnetic field generator. The coaxial connector is arranged on the axial line of the annular permanent magnet or the solenoid, and the annular permanent magnet or the solenoid is coaxial with the coaxial connector, so that the magnetic field energy can be utilized to the maximum extent, and the electronic excitation suppression rate is improved.
In certain embodiments, the coaxial connector is a straight coaxial connector.
The male head and the female head of the linear coaxial connector are both positioned on the same straight line, so that the linear coaxial connector is very suitable for mounting an annular permanent magnet or a cylindrical electromagnet, can realize the tight fit of the magnetic field generator and the coaxial connector, and has the advantages of compact structure and convenience in mounting.
According to the technical scheme of the invention and the technical scheme of further improvement in certain embodiments, the invention has the following beneficial effects:
by means of an external magnetic field (particularly an axial magnetic field), the stress condition of charged particles in the inner area of the microwave connector is changed, so that the motion trail of the particles is changed, the acceleration time of the particles in the microwave field is shortened, the kinetic energy of the particles when the particles impact the wall of the device is reduced, the probability of secondary electron excitation is reduced, the power threshold of the coaxial connector is improved, and the coaxial connector is guaranteed to normally work in a space environment.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view showing a configuration of a microwave connector and a magnetic field generator according to embodiment 1;
FIG. 2 is a schematic diagram of the magnetic field distribution of a ring magnet;
FIG. 3 is a schematic view of the magnetic field distribution of a ring magnet along the diameter direction;
fig. 4 is a schematic view of the magnetic field distribution of the ring magnet along the length direction.
Wherein:
10 is the microwave connector inner conductor;
11 is the outer conductor of the microwave connector;
20 is a supporting layer;
30 is an annular permanent magnet;
a is a male head;
b is a female head;
OP is the central axis of the coaxial microwave connector;
d is the outer diameter of the ring magnet
L is the length of the ring magnet;
d is the inner diameter of the ring magnet.
Detailed Description
It should be noted that the specific embodiments, examples and features thereof may be combined with each other in the present application without conflict. The present invention will now be described in detail with reference to the attached figures in conjunction with the following.
In order to make the technical solutions of the present invention better understood, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments and examples obtained by a person skilled in the art without any inventive step should fall within the protection scope of the present invention.
The signal connecting device with the micro-discharge inhibition function comprises a microwave connector and a magnetic field generator, wherein the microwave connector is arranged in the magnetic field generator, the stress condition of charged particles in the inner area of the microwave connector is changed by utilizing a magnetic field generated by the magnetic field generator, the motion track of the particles is changed, the acceleration time of the particles in a microwave field is shortened, the kinetic energy of the particles when the particles impact the wall of the device is reduced, the probability of secondary electron excitation is reduced, and the purpose of inhibiting the micro-discharge of the microwave connector is achieved.
The invention can be widely used for microwave connectors of various types, such as an L29 type connector, an N connector, an SMA connector, an APC-7 connector and the like, and a proper magnetic field generator is selected according to different connectors and is placed in the magnetic field generator, and a permanent magnet or an electromagnet can be used as the magnetic field generator.
Examples
The microwave connector of the embodiment adopts an L29 coaxial connector, and the magnetic field generator adopts an annular permanent magnet.
The L29 coaxial connector is formed by butt joint of a male head A and a female head B. The outer conductor 11 and the inner conductor 10 of the L29 type coaxial connector are coaxial and the annular permanent magnet 30 is coaxial with the L29 type coaxial connector, as shown by the axis OP in fig. 1.
The inner diameter of the ring magnet 30 is larger than the outer diameter of the outer conductor of the L29 coaxial connector, which facilitates installation of the ring magnet 30. The gap between the ring-shaped permanent magnet 30 and the L29 type coaxial connector may be filled with a medium constituting a support layer 20 for securing and protecting the connector. As shown in fig. 1.
In fig. 1, the male a and female B connection ends of the L29 type coaxial connector are positioned at the middle of the ring permanent magnet 30. The position is the position where the magnetic field distribution of the annular permanent magnet is most uniform and the magnetic field intensity is the greatest, and the charged particles in the inner area of the connector can absorb the magnetic field energy to the greatest extent, so that the stress condition and the motion trail of the charged particles are changed, the acceleration time of the particles in a microwave field is shortened, the kinetic energy of the particles when the particles impact the wall of the connector is reduced, the probability of secondary electron excitation is reduced, and the micro-discharge of the connector is effectively inhibited.
The inner diameter D of the ring-shaped permanent magnet 30 is 20mm, the outer diameter D is 30mm, the length L is 40mm, the magnetization mode is axial magnetization, the residual magnetism Br is 12200Gauss, and the material is neodymium iron boron.
The ring-shaped permanent magnet 30 has a magnetic field intensity distribution as shown in fig. 2, a magnetic field distribution in the diameter direction and a magnetic field distribution in the length direction as shown in fig. 3 and 4, and has a uniform magnetic field intensity distribution of about 200mT at the center.
It can be seen that the ring-shaped permanent magnet 30 in fig. 1 is replaced with a solenoid and connected to an excitation power supply, and also has a microdischarge suppression function.
The microwave connector is particularly suitable for being used for the special microwave connector of the space equipment, because the space equipment usually works in a vacuum state, such as a satellite, a high-altitude aircraft and the like, micro discharge is more easily formed, and the technical scheme of the invention has practical significance.
Especially for a linear type microwave connector, the structure of the magnetic field generator can be simplified, the complexity of the magnetic field generator is reduced, and the effect is better.
Claims (10)
1. A signal connection device with a microdischarge suppression function comprises a microwave connector, and is characterized in that the microwave connector is arranged in a magnetic field generator.
2. The signal connection device with a microdischarge-suppressing function according to claim 1, wherein the magnetic field generator is constituted by a permanent magnet.
3. The signal connection device with a microdischarge suppression function according to claim 1, wherein the magnetic field generator is constituted by an electromagnet.
4. The signal connection device with a microdischarge suppression function according to claim 1, wherein the microwave connector is a space equipment dedicated microwave connector.
5. The signal connection device with a microdischarge suppression function according to any one of claims 1-4, wherein the microwave connector is a coaxial connector.
6. The signal connection device with a microdischarge-suppressing function according to claim 5, wherein the magnetic field generator is constituted by an annular permanent magnet.
7. The signal connection device with a microdischarge suppression function according to claim 6, wherein the annular permanent magnet is coaxial with the coaxial line connector.
8. The signal connection device with a microdischarge suppression function according to claim 5, wherein the magnetic field generator is constituted by a solenoid and its excitation power supply.
9. The signal connecting device with a microdischarge suppression function according to claim 8, wherein the solenoid is coaxial with a coaxial line connector.
10. The signal connection device with a microdischarge suppression function according to claim 5, wherein the coaxial connector is a straight coaxial connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223218.9A CN111370952A (en) | 2020-03-26 | 2020-03-26 | Signal connection device with micro-discharge inhibiting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223218.9A CN111370952A (en) | 2020-03-26 | 2020-03-26 | Signal connection device with micro-discharge inhibiting function |
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| CN111370952A true CN111370952A (en) | 2020-07-03 |
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| CN202010223218.9A Pending CN111370952A (en) | 2020-03-26 | 2020-03-26 | Signal connection device with micro-discharge inhibiting function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506967A (en) * | 2021-09-10 | 2021-10-15 | 四川大学 | Metamaterial inner conductor and square coaxial cable |
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| FR2823634A1 (en) * | 2001-04-13 | 2002-10-18 | Pierre Henri Raymond Johannet | Protection of electrical conductors from interface micro-discharges (IMD) uses constant, perpendicular electrical and magnetic fields |
| KR20110109268A (en) * | 2010-03-31 | 2011-10-06 | (주)테크맥 | Built-in type micro edm spindle |
| CN102509839A (en) * | 2011-11-17 | 2012-06-20 | 中国电信股份有限公司 | Microwave device and manufacturing method therefor |
| CN102509843A (en) * | 2011-11-10 | 2012-06-20 | 西安空间无线电技术研究所 | Coaxial resonator tuning structure capable of reducing micro discharging risk |
| CN105449329A (en) * | 2015-12-30 | 2016-03-30 | 西南应用磁学研究所 | Design method for restraining micro discharging of satellite-borne high-power microwave ferrite circulator |
| CN107248605A (en) * | 2017-06-19 | 2017-10-13 | 西安空间无线电技术研究所 | A kind of high-power circulator and its anti-micro discharge design method |
| CN107871943A (en) * | 2016-09-23 | 2018-04-03 | 苹果公司 | Magnetic force RF connectors |
| CN207800858U (en) * | 2017-12-22 | 2018-08-31 | 西安富士达微波技术有限公司 | A kind of aerospace grade waveguide isolator |
| CN108521001A (en) * | 2018-06-08 | 2018-09-11 | 西南应用磁学研究所 | L-band micro discharge inhibits star high power circulator |
| CN109659763A (en) * | 2017-10-10 | 2019-04-19 | A·雷蒙德公司 | Coupling arrangement including multipole magnetic circuit |
-
2020
- 2020-03-26 CN CN202010223218.9A patent/CN111370952A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2823634A1 (en) * | 2001-04-13 | 2002-10-18 | Pierre Henri Raymond Johannet | Protection of electrical conductors from interface micro-discharges (IMD) uses constant, perpendicular electrical and magnetic fields |
| KR20110109268A (en) * | 2010-03-31 | 2011-10-06 | (주)테크맥 | Built-in type micro edm spindle |
| CN102509843A (en) * | 2011-11-10 | 2012-06-20 | 西安空间无线电技术研究所 | Coaxial resonator tuning structure capable of reducing micro discharging risk |
| CN102509839A (en) * | 2011-11-17 | 2012-06-20 | 中国电信股份有限公司 | Microwave device and manufacturing method therefor |
| CN105449329A (en) * | 2015-12-30 | 2016-03-30 | 西南应用磁学研究所 | Design method for restraining micro discharging of satellite-borne high-power microwave ferrite circulator |
| CN107871943A (en) * | 2016-09-23 | 2018-04-03 | 苹果公司 | Magnetic force RF connectors |
| CN107248605A (en) * | 2017-06-19 | 2017-10-13 | 西安空间无线电技术研究所 | A kind of high-power circulator and its anti-micro discharge design method |
| CN109659763A (en) * | 2017-10-10 | 2019-04-19 | A·雷蒙德公司 | Coupling arrangement including multipole magnetic circuit |
| CN207800858U (en) * | 2017-12-22 | 2018-08-31 | 西安富士达微波技术有限公司 | A kind of aerospace grade waveguide isolator |
| CN108521001A (en) * | 2018-06-08 | 2018-09-11 | 西南应用磁学研究所 | L-band micro discharge inhibits star high power circulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506967A (en) * | 2021-09-10 | 2021-10-15 | 四川大学 | Metamaterial inner conductor and square coaxial cable |
| CN113506967B (en) * | 2021-09-10 | 2021-11-16 | 四川大学 | Metamaterial inner conductor and square coaxial cable |
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Application publication date: 20200703 |
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