CN117254274A - High-power slot array antenna based on slow wave structure - Google Patents
High-power slot array antenna based on slow wave structure Download PDFInfo
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- CN117254274A CN117254274A CN202311471852.4A CN202311471852A CN117254274A CN 117254274 A CN117254274 A CN 117254274A CN 202311471852 A CN202311471852 A CN 202311471852A CN 117254274 A CN117254274 A CN 117254274A
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- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
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Abstract
The invention provides a high-power slot array antenna based on a slow wave structure, which comprises a double-slit slot resonant cavity; the double-slit resonant cavity is provided with double-slit slits distributed in an array manner; the slow wave structure distributed in an array strip shape is arranged in the double slit resonant cavity, and a central column body penetrates through the center of the slow wave structure and is fixed in the double slit resonant cavity; the slow wave structure is perpendicular to the double slit. The invention improves the input coaxial feeder, and improves the gain and the efficiency; the double-slit mode is used, so that the electric field intensity is reduced, and the power capacity is improved; in the process of establishing the model, the right angles of the array antenna model are chamfered, so that the processing of a machine tool is facilitated, and the manufacturing cost is reduced.
Description
Technical Field
The invention relates to a high-power slot array antenna based on a slow wave structure, and belongs to the technical field of high-power microwave antennas.
Background
The high-power microwave weapon system superimposes and focuses high-power microwaves with the peak power of antenna radiation being more than 100MW and the frequency being between 100Hz and 100GHz in a specific space, thereby causing the directional energy weapon with soft-killing effects such as disturbance, strong interference, damage and the like to the electronic information system. Therefore, the high-power microwave weapon has very high application value in the military field. The extremely high application value of the high-power microwave weapon promotes the high-quality development of the high-power microwave technology, and the output power of the microwave source is improved to GW level. Microwave antennas are at risk of high power breakdown, and traditional array antennas are limited by low power capacity of T/R components, phase shifters and power division networks, so that requirements for radiating high-power microwaves are difficult to meet.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-power slot array antenna based on a slow wave structure, which can effectively solve the problems that the power capacity, the gain and the efficiency of the existing high-power microwave antenna are not high and the requirements of a high-power microwave weapon system cannot be met.
The invention is realized by the following technical scheme.
The invention provides a high-power slot array antenna based on a slow wave structure, which comprises a double-slit slot resonant cavity; the double-slit resonant cavity is provided with double-slit slits distributed in an array manner; the slow wave structure distributed in an array strip shape is arranged in the double slit resonant cavity, and a central column body penetrates through the center of the slow wave structure and is fixed in the double slit resonant cavity; the slow wave structure is perpendicular to the double slit.
The array of the double slit slits is distributed in a staggered manner left and right along the row direction in each row, and the staggered distribution directions of the left and right between every two adjacent rows are opposite.
The slow wave structure bypasses the position where the central column passes through.
The antenna housing is covered on the double-slit gap resonant cavity; the radome uses a high composite material with a dielectric constant of 3.5 and a magnetic loss of 0.008, wherein PIM foam has a dielectric constant of 1.09 and a magnetic loss of 0.0039.
The outer end of the central column body is fixed in the coaxial feed, and the outer end of the coaxial feed is connected and provided with a waveguide coaxial converter.
The waveguide coaxial converter is of a cone structure, and a coaxial cone is arranged in the waveguide coaxial converter.
The edges of the double-slotting slits are rounded.
The lower part of the double-slit resonant cavity is provided with a stainless steel air tap for air charging and exhausting.
The double slit resonant cavity is filled with high wave-transparent material for isolating inner and outer gases.
The waveguide coaxial converter has an inner diameter of 30.55mm and an outer diameter of 32.55mm.
The invention has the beneficial effects that: the input coaxial feeder is improved, the gain, the efficiency and the power capacity are improved, and the cost is reduced; the double-slit mode is used, so that the electric field intensity is reduced, and the power capacity is improved; in the process of establishing the model, the right angles of the array antenna model are chamfered, so that the processing of a machine tool is facilitated, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic structural view of at least one embodiment of the present invention;
FIG. 2 is a schematic view of the slow wave structure and the flat structure of the double slit in FIG. 1;
FIG. 3 is a graph of antenna pattern versus cross polarization in one embodiment of the invention;
FIG. 4 is S in one embodiment of the invention 11 A parameter graph;
FIG. 5 is an electric field distribution diagram in one embodiment of the invention;
in the figure: the coaxial converter comprises a 1-waveguide coaxial converter, a 2-coaxial feed, a 3-slow wave structure, a 4-double slit resonant cavity, a 5-radome, a 6-coaxial cone, a 7-central cylinder, an 8-stainless steel air tap and a 9-double slit.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
Example 1
The high-power slot array antenna based on the slow wave structure as shown in fig. 1 and 2 comprises a double-slit slot resonant cavity 4; the double slit resonant cavity 4 is provided with double slit slits 9 distributed in an array; the slow wave structure 3 distributed in an array strip shape is arranged in the double slit resonant cavity 4, and a central column 7 is arranged in the center of the slow wave structure 3 and penetrates through and is fixed in the double slit resonant cavity 4; the slow wave structure 3 is perpendicular to the double slit 9.
Example 2
Based on embodiment 1, the array of the double slit slits 9 is distributed in a staggered manner left and right in the row direction within each row, and the staggered direction is opposite between every two adjacent rows.
Further, the slow wave structure 3 is detoured at the position where the central cylinder 7 passes through.
Further, the antenna housing 5 is covered on the double-slit slot resonant cavity 4; the radome 5 uses a high composite material with a dielectric constant of 3.5 and a magnetic loss of 0.008, wherein PIM foam has a dielectric constant of 1.09 and a magnetic loss of 0.0039.
Example 3
Based on embodiment 1, the outer end of the central cylinder 7 is fixed in the coaxial feed 2, and the outer end of the coaxial feed 2 is connected and provided with the waveguide coaxial converter 1.
Further, the waveguide coaxial converter 1 has a cone structure, and a coaxial cone 6 is arranged in the waveguide coaxial converter 1.
Further, the waveguide coaxial converter 1 has an inner diameter of 30.55mm and an outer diameter of 32.55mm.
Example 4
Based on example 1, the edges of the double slit 9 are rounded.
Furthermore, the lower part of the double-slit resonant cavity 4 is provided with a stainless steel air tap 8 for air charging and exhausting.
Furthermore, the double slit resonant cavity 4 is filled with high wave-transparent material for isolating the internal and external gases.
Example 5
Based on the embodiment, the coaxial waveguide converter comprises a coaxial waveguide converter, a coaxial feed, a slow wave structure, a double-slit slot resonant cavity and an antenna housing. The waveguide coaxial converter is connected with the radio frequency signal line and the coaxial feed port, and a sealing ring is added at the joint of the waveguide coaxial converter and the coaxial feed port for sealing and isolating treatment; the waveguide coaxial converter contains high wave-transmitting materials, and plays a role in isolating internal and external gases; the coaxial feed comprises an outer shell opening and a central cylinder, and the central cylinder is fixed on the upper cavity of the double-slit gap resonant cavity through a screw; the double-slit resonant cavity is internally provided with a slow wave structure, and the upper cavity metal surface is formed by arranging mutually-interweaved slit units with double slits and rounded corners; the antenna cover is arranged on the double-slit gap resonant cavity and is fixed by a through hole screw and sealed by a sealing ring.
When in operation, electromagnetic wave is fed from the input port of the waveguide coaxial converter, and in the lower structure of the waveguide coaxial converter, the electromagnetic wave propagates upwards along the coaxial cone to the coaxial feed inlet, is restrained and amplified by the coaxial cone and the metal shell of the waveguide coaxial converter, and is converted into TM 01 The mode, coaxial feeder connects the resonant cavity, and cooperates with the slow wave structure to excite any higher order mode. The electromagnetic wave converges the straight beam to radiate outwards in amplitude modulation phase modulation of the analyzed slot.
The waveguide coaxial converter has an inner diameter r1=30.55 mm and an outer diameter r1=32.55 mm. The coaxial waveguide feed system has the structure height of h1=70 mm, the lower cone structure height of h2=30 mm and the input port N-50 type conversion port of the lower cone.
For the double-slit resonant cavity, a slow wave structure is arranged in the resonant cavity, the double-slit is etched on the upper cavity surface, the resonant cavity array length is c=472 mm, the width is k=356 mm, the thickness is h=53 mm, the slits are alternately arranged on the cavity, the slit length c1=25.2 mm, the width is k1=12.5 mm, the double-slit interval is d=3 mm, chamfering is carried out on four corners of the slits, and the chamfering radius is r1=2.5 mm.
As shown in the far-field gain diagram of the antenna with the center frequency of 4.3GHz along phi of 0 degree in FIG. 3, the maximum gain of the antenna in the normal direction can be seen, the gain value can reach 24.5dB, the caliber efficiency is 92%, and the cross polarization is represented in the diagram and is-55 dB in the normal direction.
S with center frequency of 4.3GHz as shown in FIG. 4 11 Parameter diagram, at center frequency S 11 S of-30 dB,4.281GHz-4.315GHz 11 <20dB, exhibiting good impedance matching.
The electric field profile at a center frequency of 4.3GHz at an input of 1W energy is shown in fig. 5. From the figure it is seen that the array antenna excites the TM 709 Is uniformly and reasonably distributed. The maximum electric field strength 1801V/m, the power capacity in sulfur hexafluoride gas is 25MW.
The result shows that the invention has the characteristics of easy processing, easy integration, simple structure, high efficiency, high power capacity and the like.
Claims (10)
1. The utility model provides a high power slot array antenna based on slow wave structure, includes two slotted slot resonant cavities (4), its characterized in that: the double-slit resonant cavity (4) is provided with double-slit slits (9) distributed in an array manner; the slow wave structure (3) distributed in an array strip shape is arranged in the double slit resonant cavity (4), and a central column (7) is arranged in the center of the slow wave structure (3) and penetrates through and is fixed in the double slit resonant cavity (4); the slow wave structure (3) is vertical to the double-slit gap (9).
2. The slow wave structure based high power slot array antenna of claim 1, wherein: the array of the double slit slits (9) is distributed in a staggered manner left and right along the row direction in each row, and the staggered distribution directions of the left and right between every two adjacent rows are opposite.
3. The slow wave structure based high power slot array antenna of claim 1, wherein: the slow wave structure (3) bypasses the position where the central column (7) passes through.
4. The slow wave structure based high power slot array antenna of claim 1, wherein: an antenna housing (5) is covered on the double-slit gap resonant cavity (4); the radome (5) uses a high composite material with a dielectric constant of 3.5 and a magnetic loss of 0.008, wherein the dielectric constant of PIM foam is 1.09 and the magnetic loss is 0.0039.
5. The slow wave structure based high power slot array antenna of claim 1, wherein: the outer end of the central cylinder (7) is fixed in the coaxial feed (2), and the outer end of the coaxial feed (2) is connected with the waveguide coaxial converter (1).
6. The slow wave structure based high power slot array antenna of claim 5, wherein: the waveguide coaxial converter (1) is of a cone structure, and a coaxial cone (6) is arranged in the waveguide coaxial converter (1).
7. The slow wave structure based high power slot array antenna of claim 1, wherein: the edges of the double-slotting slits (9) are rounded.
8. The slow wave structure based high power slot array antenna of claim 1, wherein: the lower part of the double-slit resonant cavity (4) is provided with a stainless steel air tap (8) for air charging and exhausting.
9. The slow wave structure based high power slot array antenna of claim 1, wherein: the double slit resonant cavity (4) is filled with high wave-transparent material for isolating internal and external gases.
10. The slow wave structure based high power slot array antenna of claim 5, wherein: the inner diameter of the waveguide coaxial converter (1) is 30.55mm, and the outer diameter is 32.55mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311471852.4A CN117254274A (en) | 2023-11-07 | 2023-11-07 | High-power slot array antenna based on slow wave structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311471852.4A CN117254274A (en) | 2023-11-07 | 2023-11-07 | High-power slot array antenna based on slow wave structure |
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| CN117254274A true CN117254274A (en) | 2023-12-19 |
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| CN202311471852.4A Pending CN117254274A (en) | 2023-11-07 | 2023-11-07 | High-power slot array antenna based on slow wave structure |
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- 2023-11-07 CN CN202311471852.4A patent/CN117254274A/en active Pending
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