CN211957919U - 45-degree linear polarization low-sidelobe radar antenna - Google Patents
45-degree linear polarization low-sidelobe radar antenna Download PDFInfo
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- CN211957919U CN211957919U CN202020886034.6U CN202020886034U CN211957919U CN 211957919 U CN211957919 U CN 211957919U CN 202020886034 U CN202020886034 U CN 202020886034U CN 211957919 U CN211957919 U CN 211957919U
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Abstract
The utility model discloses a 45-degree linear polarization low-sidelobe radar antenna, wherein a microstrip feeder line is horizontally arranged in the middle of a dielectric plate, one end of the microstrip feeder line is flush with the edge of the dielectric plate, and a gap is arranged between the other end of the microstrip feeder line and the edge of the other end of the dielectric plate; the number of the radiation patches is eight, each radiation patch rotates 45 degrees rightwards, the upper right corner of each radiation patch is connected with one side of the microstrip feeder line, the first radiation patch is arranged at the free end of the microstrip feeder line, the radiation patches at the back are sequentially arranged, and the length of the medium wavelength of the medium plate is set between every two radiation patches at intervals; the first radiating patch width is 0.26 times the fourth radiating patch width, the second radiating patch width is 0.5 times the fourth radiating patch width, and the third radiating patch width is 0.8 times the fourth radiating patch width. The utility model discloses simple structure, easily processing has realized extremely low vice lamella level, and cross polarization is lower.
Description
Technical Field
The utility model relates to a low vice lamella radar antenna of 45 degrees linear polarization belongs to radar antenna technical field.
Background
Traffic radar antennas have a function of transmitting and receiving electromagnetic waves, and require antennas having high gain and low sidelobes.
At present, the research on millimeter wave antennas at home and abroad focuses on vertical and horizontal polarization forms, under the condition of reverse driving, strong electromagnetic interference between devices can be caused by adopting vertical or horizontal polarization, the antenna side lobe is high, and a low side lobe can be realized by combining a Digital Beam Forming (DBF) technology, but the technology brings great challenges to digital signal processing at the rear end of a radar.
While 45 degree linear polarization can orthogonalize the polarization of vehicles traveling in opposite directions, thereby reducing coupling between devices. Therefore, the research on the design of the low sidelobe radar antenna with 45-degree linear polarization has great significance.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a low vice lamella radar antenna of 45 degrees linear polarization.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme does:
a 45-degree linearly polarized low sidelobe radar antenna, comprising: the dielectric-slab, the dielectric-slab top surface is provided with the antenna layer, the antenna layer includes: the microstrip feed line is horizontally arranged in the middle of the dielectric plate, one end of the microstrip feed line is flush with the edge of the dielectric plate, and a gap is formed between the other end of the microstrip feed line and the other edge of the dielectric plate; the number of the radiation patches is eight, each radiation patch rotates 45 degrees rightwards, the upper right corner of each radiation patch is connected with one side of the microstrip feeder line, the first radiation patch is arranged at the free end of the microstrip feeder line, the radiation patches at the back are sequentially arranged, and the length of the medium wavelength of the medium plate is set between every two radiation patches at intervals; the width of the first radiation patch is the same as that of the eighth radiation patch, the width of the second radiation patch is the same as that of the seventh radiation patch, the width of the third radiation patch is the same as that of the sixth radiation patch, and the width of the fourth radiation patch is the same as that of the fifth radiation patch; the first radiating patch width is 0.26 times the fourth radiating patch width, the second radiating patch width is 0.5 times the fourth radiating patch width, and the third radiating patch width is 0.8 times the fourth radiating patch width.
Preferably, the floor board is further included, and the floor board is arranged at the bottom of the medium plate.
Preferably, the thickness of the antenna layer is 0.025mm, the thickness of the dielectric plate is 0.127mm, and the thickness of the floor is 0.018 mm.
Preferably, the medium plate material is RO 3003.
Preferably, the gap between the other end of the microstrip feeder line and the other side edge of the dielectric plate is set to be 3 mm.
Preferably, the widths of the first radiation patch to the eighth radiation patch are set to be 0.16mm, 0.31mm, 0.49mm, 0.62mm, 0.62mm, 0.49mm, 0.31mm and 0.16mm in sequence.
Has the advantages that: the utility model provides a pair of low vice lamella radar antenna of 45 degrees linear polarization through with the rotatory 45 degrees of paster unit, adopts the angle to present the mode and realizes 45 degrees linear polarization, thereby the current amplitude of paster unit distributes according to chebyshev and realizes low vice lamella. The design structure is simple, the processing is easy, the extremely low side lobe level is realized, and the cross polarization is low.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic top view of the present invention;
FIG. 3 is a front sectional view of the present invention;
fig. 4 is a schematic width view of a radiation patch;
FIG. 5 is the directional diagram of the main polarization of the antenna;
fig. 6 shows the main polarization and cross polarization patterns of the antenna.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1 to 3, a 45-degree linearly polarized low sidelobe radar antenna includes: dielectric- slab 2, 2 top surfaces of dielectric-slab are provided with antenna layer 1, antenna layer 1 includes: the antenna comprises a micro-strip feeder line 101 and a radiation patch, wherein the micro-strip feeder line 101 is horizontally arranged in the middle of the dielectric plate 2, one end of the micro-strip feeder line 101 is flush with the edge of the dielectric plate 2 and is used for feeding, and a gap is formed between the other end of the micro-strip feeder line 101 and the other edge of the dielectric plate 2 and is used for outward radiation of a beam of an antenna pitching surface; the number of the radiation patches is eight, each radiation patch rotates 45 degrees rightwards, the upper right corner of each radiation patch is connected with one side of the microstrip feeder line, the first radiation patch 111 is arranged at the free end of the microstrip feeder line, the radiation patches at the back are sequentially arranged, and the length of the medium wavelength of the medium plate is arranged between every two radiation patches at intervals and used for ensuring that different radiation units can radiate in phase, so that the maximum gain is achieved; the first radiation patch 111 and the eighth radiation patch 118 have the same width, the second radiation patch 112 and the seventh radiation patch 117 have the same width, the third radiation patch 113 and the sixth radiation patch 116 have the same width, and the fourth radiation patch 114 and the fifth radiation patch 115 have the same width; the width of the first radiation patch 111 is 0.26 times that of the fourth radiation patch 114, the width of the second radiation patch 112 is 0.5 times that of the fourth radiation patch 114, and the width of the third radiation patch 113 is 0.8 times that of the fourth radiation patch 114, so as to realize that the current amplitude relation of the radiation element from the edge to the center is 0.26: 0.5: 0.8: 1: 1: 0.8: 0.5: 0.26.
the medium plate is characterized by further comprising a floor 3, wherein the floor 3 is arranged at the bottom of the medium plate 2.
The thickness of the antenna layer 1 is 0.025mm, the thickness of the dielectric plate 2 is 0.127mm, and the thickness of the floor 3 is 0.018 mm.
The material of the medium plate 2 is RO 3003.
And the gap between the other end of the microstrip feeder line 101 and the other side edge of the dielectric plate 2 is set to be 3 mm.
As shown in fig. 4, the widths of the first radiation patch 111 to the eighth radiation patch 118 are set to 0.16mm, 0.31mm, 0.49mm, 0.62mm, 0.62mm, 0.49mm, 0.31mm, and 0.16mm in this order.
Example 1:
the radiation patches are arranged in an array on the microstrip antenna, 45-degree linear polarization is realized by rotating the radiation patches by 45 degrees and adopting an angle feed mode, and the current amplitude of the radiation patches is distributed according to Chebyshev so as to realize low side lobes.
Example 2:
as shown in fig. 5, the antenna gain is 14dBi, the side lobe level value is-29 dB, and the side lobe is lower than that of a vertically polarized or horizontally polarized antenna, which indicates that the current amplitude of the antenna radiation patch array can achieve an extremely low side lobe level by using the chebyshev distribution.
Example 3:
as shown in fig. 6, the solid line in the graph is the main polarization azimuth and elevation direction diagram, the dotted line is the elevation cross polarization direction diagram, the dotted line is the azimuth cross polarization direction diagram, the azimuth cross polarization ratio is 16dB, and the elevation cross polarization ratio is 22 dB. The antenna polarization is 45-degree linear polarization, the azimuth cross polarization ratio is 16dB, the elevation cross polarization ratio is 22dB, the antenna side lobe level value is-29 dB, the side lobe is lower than that of the conventional traffic antenna array, and the anti-interference capability among radar devices can be improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (6)
1. A 45-degree linearly polarized low sidelobe radar antenna, comprising: the dielectric plate, its characterized in that: the dielectric-slab top surface is provided with the antenna layer, the antenna layer includes: the microstrip feed line is horizontally arranged in the middle of the dielectric plate, one end of the microstrip feed line is flush with the edge of the dielectric plate, and a gap is formed between the other end of the microstrip feed line and the other edge of the dielectric plate; the number of the radiation patches is eight, each radiation patch rotates 45 degrees rightwards, the upper right corner of each radiation patch is connected with one side of the microstrip feeder line, the first radiation patch is arranged at the free end of the microstrip feeder line, the radiation patches at the back are sequentially arranged, and the length of the medium wavelength of the medium plate is set between every two radiation patches at intervals; the width of the first radiation patch is the same as that of the eighth radiation patch, the width of the second radiation patch is the same as that of the seventh radiation patch, the width of the third radiation patch is the same as that of the sixth radiation patch, and the width of the fourth radiation patch is the same as that of the fifth radiation patch; the first radiating patch width is 0.26 times the fourth radiating patch width, the second radiating patch width is 0.5 times the fourth radiating patch width, and the third radiating patch width is 0.8 times the fourth radiating patch width.
2. A 45-degree linearly polarized low sidelobe radar antenna according to claim 1, wherein: the floor board is further included, and the floor board is arranged at the bottom of the medium plate.
3. A 45-degree linearly polarized low sidelobe radar antenna according to claim 2, wherein: the thickness of the antenna layer is 0.025mm, the thickness of the dielectric plate is 0.127mm, and the thickness of the floor is 0.018 mm.
4. A 45-degree linearly polarized low sidelobe radar antenna according to claim 1, wherein: the dielectric plate material is RO 3003.
5. A 45-degree linearly polarized low sidelobe radar antenna according to claim 1, wherein: and a gap between the other end of the microstrip feeder line and the other side edge of the dielectric plate is set to be 3 mm.
6. A 45-degree linearly polarized low sidelobe radar antenna according to claim 1, wherein: the widths of the first radiating patch to the eighth radiating patch are sequentially set to be 0.16mm, 0.31mm, 0.49mm, 0.62mm, 0.62mm, 0.49mm, 0.31mm and 0.16 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020886034.6U CN211957919U (en) | 2020-05-25 | 2020-05-25 | 45-degree linear polarization low-sidelobe radar antenna |
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| CN202020886034.6U CN211957919U (en) | 2020-05-25 | 2020-05-25 | 45-degree linear polarization low-sidelobe radar antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768916A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | 1 x 8 broadband wave beam fixed travelling wave antenna |
| CN112768913A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | Broadband wave beam fixed traveling wave antenna |
| CN112768912A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | 1X 4 wave beam fixed traveling wave antenna |
-
2020
- 2020-05-25 CN CN202020886034.6U patent/CN211957919U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768916A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | 1 x 8 broadband wave beam fixed travelling wave antenna |
| CN112768913A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | Broadband wave beam fixed traveling wave antenna |
| CN112768912A (en) * | 2020-12-29 | 2021-05-07 | 中山大学 | 1X 4 wave beam fixed traveling wave antenna |
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