CN111786692A - Radio frequency transmission device for helicon wave plasma electric propeller - Google Patents
Radio frequency transmission device for helicon wave plasma electric propeller Download PDFInfo
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- CN111786692A CN111786692A CN202010614743.3A CN202010614743A CN111786692A CN 111786692 A CN111786692 A CN 111786692A CN 202010614743 A CN202010614743 A CN 202010614743A CN 111786692 A CN111786692 A CN 111786692A
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- insulating block
- cylindrical insulating
- radio frequency
- metal
- ladder
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The invention discloses a radio frequency transmission device for a helicon wave plasma electric propeller, which comprises a rigid metal tubular outer conductor, a cylindrical insulating block, a metal rod-shaped central conductor and a metal gasket, wherein the inner walls of two ends of the rigid metal tubular outer conductor are sequentially provided with a first ladder and a second ladder from the middle part to the two ends, the cylindrical insulating block is embedded in the inner wall of the first ladder at two ends of the rigid metal tubular outer conductor, the outer end of the cylindrical insulating block is provided with a ladder groove, and the metal gasket is sleeved between the second ladder and the ladder groove at the outer end of the cylindrical insulating block. In the invention, the combined bracket type transmission structure is adopted, so that the power output by the radio frequency power supply can be transmitted to the discharge antenna without loss, and meanwhile, the phenomena of electromagnetic interference overflow and parasitic plasma in the transmission process are avoided, thereby improving the high efficiency and stability of radio frequency transmission.
Description
Technical Field
The invention relates to the technical field of space electric propulsion, in particular to a radio frequency transmission device for a helicon wave plasma electric propeller.
Background
The helicon wave plasma electric thruster has the characteristics of long electrodeless discharge life, high thrust, large specific impulse, light weight, small potential disturbance of plume charge neutrality to a spacecraft body and the like, and is very suitable for the long-life propulsion of orbital maneuver, orbit maintenance and deep space exploration of high orbit satellites. The helical wave electric propeller uses radio frequency power generated by a radio frequency power supply to apply to a discharge antenna to excite plasma so as to accelerate the generation of thrust.
Compared with a radio frequency power supply, the spiral wave electric propeller is a wave low-impedance load, the radio frequency coaxial cable cannot transmit power output by the radio frequency power supply to a discharge antenna without loss, the RG393 type high-power radio frequency coaxial cable is taken as an example, the RG393 type coaxial cable consists of an inner conductor, an insulating medium, an outer conductor and a sheath, has 50-ohm characteristic impedance, has a structure similar to that of the RG393, has characteristic impedance with a certain numerical value, and is only suitable for a static impedance radio frequency power transmission system; the use of bare conductors can spill electromagnetic interference and create parasitic plasma, requiring specialized transmission components to perform the above functions.
Disclosure of Invention
The invention aims to: in order to solve the problems that the traditional radio frequency transmission device for the helicon wave plasma electric propeller is difficult to transmit the power output by a radio frequency power supply to a discharge antenna without loss and can generate electromagnetic interference overflow and parasitic plasma, the radio frequency transmission device for the helicon wave plasma electric propeller is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a radio frequency transmission device for helicon wave plasma electric propulsor, includes rigidity metal tubulose outer conductor, cylindrical insulating block, the bar-shaped central conductor of metal and metal packing ring, first ladder and second ladder have been seted up by the middle part to both ends in proper order to the both ends inner wall of rigidity metal tubulose outer conductor, the inner wall that the both ends of rigidity metal tubulose outer conductor are located first ladder all inlays and is equipped with cylindrical insulating block, the ladder groove has been seted up to the outer end of cylindrical insulating block, the outer end of cylindrical insulating block is located and overlaps between second ladder and the ladder groove and is equipped with metal packing ring, the axle center department of rigidity metal tubulose outer conductor is provided with the bar-shaped central conductor of metal that runs through cylindrical insulating block.
As a further description of the above technical solution:
the inner diameter of the rigid metal tubular outer conductor at the first step is equal to the outer diameter of the cylindrical insulating block.
As a further description of the above technical solution:
the inner diameter of the rigid metal tubular outer conductor at the second step is equal to the outer diameter of the metal gasket, and the inner diameter of the metal gasket is equal to the outer diameter of the step groove.
As a further description of the above technical solution:
the center of the circle of the cylindrical insulating block is provided with a central through hole, and the central through hole is in transition fit with the metal rod-shaped central conductor.
As a further description of the above technical solution:
the material of the rigid metal tubular outer conductor, the metal rod-shaped center conductor and the metal washer is preferably, but not limited to, copper.
As a further description of the above technical solution:
the material of the cylindrical insulating block is preferably polytetrafluoroethylene, but is not limited to polytetrafluoroethylene.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, a combined bracket type transmission structure is adopted, the cylindrical insulating blocks are arranged on the inner walls of the two ends of the rigid metal tubular outer conductor, the metal rod-shaped central conductor insulating bracket can be arranged at the axis position of the rigid metal tubular outer conductor, the characteristic impedance on a radio frequency transmission path is eliminated, so that the power output by the radio frequency power supply can be transmitted to the discharge antenna without damage, meanwhile, the metal rod-shaped central conductor is coated in the rigid metal tubular outer conductor in a non-contact manner through the cylindrical insulating blocks, the overflow of electromagnetic interference and the generation of parasitic plasma are effectively inhibited, the power output by the radio frequency power supply can be transmitted to the discharge antenna without damage, and the high efficiency and the stability of radio frequency transmission are improved.
Drawings
FIG. 1 is a schematic cross-sectional view of an RF transmission device for helicon wave plasma electric thruster in accordance with the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic cross-sectional view of the outer conductor wall of the present invention;
FIG. 4 is a schematic cross-sectional view of an insulating block according to the present invention;
fig. 5 is a schematic structural diagram of an RG393 type high-power rf coaxial cable in the prior art.
Illustration of the drawings:
1. a rigid metal tubular outer conductor; 101. a first step; 102. a second step; 2. a cylindrical insulating block; 201. a stepped groove; 202. a central through hole; 3. a metal rod-shaped center conductor; 4. a metal washer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-5, the present invention provides a technical solution: a radio frequency transmission device for a helicon wave plasma electric thruster comprises a rigid metal tubular outer conductor 1, a cylindrical insulating block 2, bar-shaped central conductor 3 of metal and metal packing ring 4, first step 101 and second step 102 have been seted up by middle part in proper order to both ends to the inner wall of rigid metal tubulose outer conductor 1, the inner wall that the both ends of rigid metal tubulose outer conductor 1 are located first step 101 has all been inlayed and is equipped with cylindrical insulating block 2, ladder groove 201 has been seted up to the outer end of cylindrical insulating block 2, the outer end of cylindrical insulating block 2 is located and is equipped with metal packing ring 4 between second step 102 and the ladder groove 201 in the cover, the axle center department of rigid metal tubulose outer conductor 1 is provided with the bar-shaped central conductor 3 of metal that runs through cylindrical insulating block 2, the setting of first step 101 and second step 102, the assembly of the cylindrical insulating block 2 of being convenient for is fixed to be handled, cylindrical insulating block 2 assembly's.
Example two
Specifically, as shown in fig. 1 to 4, the inner diameter of the first step 101 is equal to the outer diameter of the cylindrical insulating block 2, the inner diameter of the second step 102 is equal to the outer diameter of the metal washer 4, and the inner diameter of the metal washer 4 is equal to the outer diameter of the step groove 201, the arrangement of the structure improves the stability of the assembly between the rigid metal tubular outer conductor 1, the cylindrical insulating block 2 and the metal washer 4, the center through hole 202 is formed in the center of the circle of the cylindrical insulating block 2, and the center through hole 202 is in transition fit with the metal rod-shaped center conductor 3, and the selection of the transition fit mode improves the stability of the fit between the remaining metal rod-shaped center conductors 3 of the cylindrical insulating block 2.
EXAMPLE III
Specifically, as shown in fig. 1 to 4, the material of the rigid metal tubular outer conductor 1, the metal rod-shaped central conductor 3 and the metal washer 4 is preferably, but not limited to, copper, and the material is selected to improve the transmission performance of the rigid metal tubular outer conductor 1, the metal rod-shaped central conductor 3 and the metal washer 4, while the material of the cylindrical insulating block 2 is preferably, but not limited to, polytetrafluoroethylene, and the material is selected to improve the insulating performance, the corrosion resistance and the high temperature resistance of the cylindrical insulating block 2.
The working principle is as follows: when the radio frequency transmission device is manufactured, the metal rod-shaped central conductor 3 penetrates through the rigid metal tubular outer conductor 1, the metal rod-shaped central conductor 3 is supported at the axle center of the rigid metal tubular outer conductor 1, two groups of cylindrical insulating blocks 2 are respectively sleeved at two ends of the metal rod-shaped central conductor 3 through the central through hole 202, then the cylindrical insulating blocks 2 slide towards two ends of the rigid metal tubular outer conductor 1, when the cylindrical insulating blocks 2 slide into the first step 101 of the rigid metal tubular outer conductor 1, the metal gasket 4 can be plugged between the second step 102 and the gap of the step groove 201, so that the assembly and manufacturing processing of the radio frequency transmission device are completed, when the radio frequency transmission device is actually used, one end of the metal rod-shaped central conductor 3 can be connected to the helical wave plasma electric thruster, the radio frequency power is accessed from one end of the metal rod-shaped central conductor 3, flows into a load from the other end, and the power output by the radio frequency power supply is transmitted to, meanwhile, the exposed part of the metal rod-shaped central conductor 3 is coated in the rigid metal tubular outer conductor 1 in a non-contact manner through two groups of cylindrical insulating blocks 2, so that the overflow of electromagnetic interference and the generation of parasitic plasma are inhibited, and the high efficiency and the stability of radio frequency transmission are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A radio frequency transmission device for a helicon wave plasma electric thruster comprises a rigid metal tubular outer conductor (1), a cylindrical insulating block (2), a metal rod-shaped central conductor (3) and a metal gasket (4), it is characterized in that the inner walls of the two ends of the rigid metal tubular outer conductor (1) are sequentially provided with a first ladder (101) and a second ladder (102) from the middle part to the two ends, the two ends of the rigid metal tubular outer conductor (1) are respectively embedded with a cylindrical insulating block (2) on the inner wall of the first ladder (101), a stepped groove (201) is formed in the outer end of the cylindrical insulating block (2), a metal gasket (4) is sleeved between the second step (102) and the stepped groove (201) in the outer end of the cylindrical insulating block (2), the axis of the rigid metal tubular outer conductor (1) is provided with a metal rod-shaped central conductor (3) which penetrates through the cylindrical insulating block (2).
2. A radio frequency transmission device for a helicon wave plasma electric thruster, according to claim 1, characterized in that the inner diameter of the rigid metallic tubular outer conductor (1) at the first step (101) is equal to the outer diameter of the cylindrical insulating block (2).
3. A radio frequency transmission device for a helicon wave plasma electric thruster, according to claim 1, characterized in that the inner diameter of the rigid metal tubular outer conductor (1) at the second step (102) is equal to the outer diameter of the metal washer (4), and the inner diameter of the metal washer (4) is equal to the outer diameter of the stepped groove (201).
4. The radio frequency transmission device for the helicon wave plasma electric thruster is characterized in that the center of the cylindrical insulating block (2) is provided with a central through hole (202), and the central through hole (202) is in transition fit with the metal rod-shaped central conductor (3).
5. The rf transmission device for helicon wave plasma electric thruster according to claim 1 characterized by that the material of the rigid metal tubular outer conductor (1), the metal rod-like central conductor (3) and the metal washer (4) is preferably, but not limited to, copper.
6. The rf transmission device for helicon wave plasma electric thruster according to claim 1 characterized in that the material of the cylindrical insulating block (2) is preferably, but not limited to, teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614743.3A CN111786692A (en) | 2020-06-30 | 2020-06-30 | Radio frequency transmission device for helicon wave plasma electric propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614743.3A CN111786692A (en) | 2020-06-30 | 2020-06-30 | Radio frequency transmission device for helicon wave plasma electric propeller |
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| Publication Number | Publication Date |
|---|---|
| CN111786692A true CN111786692A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010614743.3A Pending CN111786692A (en) | 2020-06-30 | 2020-06-30 | Radio frequency transmission device for helicon wave plasma electric propeller |
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| CN (1) | CN111786692A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090484A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044812A (en) * | 2009-10-12 | 2011-05-04 | 华为终端有限公司 | Radio frequency connector, base station and method for transmitting radio frequency signal |
| CN102315538A (en) * | 2010-07-05 | 2012-01-11 | 贾群 | Radio frequency coaxial cable connector |
| CN110212358A (en) * | 2018-12-29 | 2019-09-06 | 中兴通讯股份有限公司 | RF repeating component and radio frequency connector with it |
| CN210517226U (en) * | 2019-09-19 | 2020-05-12 | 成都安擎微波科技有限责任公司 | SMA coaxial connector for preventing insulating medium from falling off |
-
2020
- 2020-06-30 CN CN202010614743.3A patent/CN111786692A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044812A (en) * | 2009-10-12 | 2011-05-04 | 华为终端有限公司 | Radio frequency connector, base station and method for transmitting radio frequency signal |
| CN102315538A (en) * | 2010-07-05 | 2012-01-11 | 贾群 | Radio frequency coaxial cable connector |
| CN110212358A (en) * | 2018-12-29 | 2019-09-06 | 中兴通讯股份有限公司 | RF repeating component and radio frequency connector with it |
| CN210517226U (en) * | 2019-09-19 | 2020-05-12 | 成都安擎微波科技有限责任公司 | SMA coaxial connector for preventing insulating medium from falling off |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090484A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
| CN113090484B (en) * | 2021-03-30 | 2022-02-01 | 电子科技大学 | Thrust adjusting device of helicon wave plasma electric thruster |
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Application publication date: 20201016 |
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