CN215497072U - Millimeter wave antenna - Google Patents
Millimeter wave antenna Download PDFInfo
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- CN215497072U CN215497072U CN202121968515.2U CN202121968515U CN215497072U CN 215497072 U CN215497072 U CN 215497072U CN 202121968515 U CN202121968515 U CN 202121968515U CN 215497072 U CN215497072 U CN 215497072U
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- microstrip line
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- radiation
- parasitic microstrip
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Abstract
The utility model discloses a millimeter wave antenna, which comprises a substrate, a feeder line arranged on the substrate and a radiation unit connected with the feeder line, and is characterized in that: the radiating unit comprises a first radiating component and a second radiating component, wherein a first parasitic microstrip line is arranged between the first radiating component and the second radiating component, and the length of the first parasitic microstrip line is longer than the integral length of any one of the first radiating component and the second radiating component. The millimeter wave antenna comprises a first radiation component and a second radiation component, wherein a first parasitic microstrip line is arranged between the first radiation component and the second radiation component, and the length of the first parasitic microstrip line is longer than the integral length of any one of the first radiation component and the second radiation component, so that a reflector is formed, and radiation gain is improved.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to a millimeter wave antenna.
Background
When the millimeter wave radar system is applied to distance measurement and target detection, the wave beams transmitted by the radar antenna must be concentrated, so that the power gain of the antenna to a specific direction is improved, signals are transmitted aiming at a target to be detected, clutter scattering is reduced as much as possible, and the radar resolution and sensitivity are improved. In the radar antenna in the prior art, a plurality of antenna units are generally used to form an array to obtain gain improvement, however, the above method increases the space occupied by the radar antenna, and the number of units is large, and the cost is high.
Disclosure of Invention
The utility model aims to provide a millimeter wave antenna which is small in number of antenna units, small in occupied space and low in cost.
In order to solve the technical problems, the utility model adopts the technical scheme that:
the utility model provides a millimeter wave antenna, includes the base plate, sets up feeder on the base plate and the radiating element who is connected with the feeder, its characterized in that: the radiating unit comprises a first radiating component and a second radiating component, wherein a first parasitic microstrip line is arranged between the first radiating component and the second radiating component, and the length of the first parasitic microstrip line is longer than the integral length of any one of the first radiating component and the second radiating component.
The distance between the first parasitic microstrip line and the first radiation component and the second radiation component is one sixteenth wavelength to one quarter wavelength.
The substrate is also provided with a second parasitic microstrip line and a third parasitic microstrip line, the second parasitic microstrip line is arranged on the outer side of the first radiation assembly, and the third parasitic microstrip line is arranged on the outer side of the second radiation assembly; the length of the second parasitic microstrip line is smaller than that of the first radiating component, and the length of the third parasitic microstrip line is smaller than that of the second radiating component.
The distance between the second parasitic microstrip line and the first radiation component is one eighth to one half wavelength; the distance between the third parasitic microstrip line and the second radiation component is between one eighth and one half wavelength.
The second parasitic microstrip line is preferably located in the middle of the first radiating component in the length direction. The third parasitic microstrip line is preferably located in the middle of the second radiation assembly in the length direction.
The first radiating component comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
The second radiating component comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
The first parasitic microstrip line, the second parasitic microstrip line and the third parasitic microstrip line are preferably equal-width lines and have the same width.
Compared with the prior art, the utility model has the beneficial effects that:
the millimeter wave antenna comprises a first radiation assembly and a second radiation assembly, wherein a first parasitic microstrip line is arranged between the first radiation assembly and the second radiation assembly, and the length of the first parasitic microstrip line is longer than the whole length of any one of the first radiation assembly and the second radiation assembly, so that the upper end or the lower end or even the upper end and the lower end simultaneously extend out of the end parts of the first radiation assembly and the second radiation assembly to form a reflector, and the radiation gain is improved.
The second parasitic microstrip line and the third parasitic microstrip line are respectively arranged on the outer sides of the first radiation assembly and the second radiation assembly, the length of the second parasitic microstrip line is smaller than that of the first radiation assembly, the length of the third parasitic microstrip line is smaller than that of the second radiation assembly, and a guiding effect is formed by combining the length between the second parasitic microstrip line and the first radiation assembly and the length between the third parasitic microstrip line and the second radiation assembly, so that the antenna gain is further improved.
Drawings
FIG. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second antenna according to an embodiment of the present invention;
FIG. 3 is a graph of antenna gain according to a second embodiment of the present invention;
fig. 4 is an antenna gain diagram according to a second embodiment of the present invention.
Detailed Description
The utility model is described in detail below with reference to the accompanying drawings:
example one
As shown in fig. 1, a millimeter wave antenna of the present invention includes a substrate 1, a feeder 2 disposed on the substrate, and a radiation element 3 connected to the feeder. The radiation unit 3 includes a first radiation component 31 and a second radiation component 32, a first parasitic microstrip line 4 is disposed between the first radiation component 31 and the second radiation component 32, and the length of the first parasitic microstrip line 4 is longer than the entire length of any one of the first radiation component 31 and the second radiation component 32.
The distance between the first parasitic microstrip line 4 and the first and second radiation elements 31 and 32 is one sixteenth wavelength to one quarter wavelength, and the guiding effect is realized by setting the distance.
The first radiating element 31 comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
The second radiating element 32 comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
In the present embodiment, the first radiation component 31 and the second radiation component 32 each employ 3 radiation units in the form of patches.
Example two
As shown in fig. 3, a millimeter wave antenna of the present invention includes a substrate 1, a feed line 2 disposed on the substrate, and a radiation element 3 connected to the feed line. The radiation unit 3 includes a first radiation component 31 and a second radiation component 32, a first parasitic microstrip line 4 is disposed between the first radiation component 31 and the second radiation component 32, and the length of the first parasitic microstrip line 4 is longer than the entire length of any one of the first radiation component 31 and the second radiation component 32. A second parasitic microstrip line 5 and a third parasitic microstrip line 6 are further arranged on the substrate 1, the second parasitic microstrip line 5 is arranged on the outer side of the first radiation component 31, and the third parasitic microstrip line 6 is arranged on the outer side of the second radiation component 32; the length of the second parasitic microstrip line 5 is smaller than that of the first radiation component 31, and the length of the third parasitic microstrip line 6 is smaller than that of the second radiation component 32.
The distance between the first parasitic microstrip line 4 and the first and second radiating elements 31 and 32 is between one sixteenth wavelength and one quarter wavelength. The distance between the second parasitic microstrip line and the first radiation component is one eighth to one half wavelength; the distance between the third parasitic microstrip line and the second radiation component is between one eighth and one half wavelength. The distance setting of the three microstrip lines is the preferred result for realizing the guiding and the reflection respectively.
The first radiating element 31 comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
The second radiating element 32 comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
In the present embodiment, the first radiation component 31 and the second radiation component 32 each employ 3 radiation units in the form of patches.
Fig. 3 and 4 are simulation data of the antenna of the present embodiment. Therefore, the antenna has good performance within 76-81GHz, and the gain can reach 18dBi at most.
Claims (9)
1. The utility model provides a millimeter wave antenna, includes the base plate, sets up feeder on the base plate and the radiating element who is connected with the feeder, its characterized in that: the radiating unit comprises a first radiating component and a second radiating component, wherein a first parasitic microstrip line is arranged between the first radiating component and the second radiating component, and the length of the first parasitic microstrip line is longer than the integral length of any one of the first radiating component and the second radiating component.
2. The millimeter-wave antenna of claim 1, wherein: the distance between the first parasitic microstrip line and the first radiation component and the second radiation component is one sixteenth wavelength to one quarter wavelength.
3. The millimeter-wave antenna of claim 1, wherein: the substrate is also provided with a second parasitic microstrip line and a third parasitic microstrip line, the second parasitic microstrip line is arranged on the outer side of the first radiation assembly, and the third parasitic microstrip line is arranged on the outer side of the second radiation assembly; the length of the second parasitic microstrip line is smaller than that of the first radiating component, and the length of the third parasitic microstrip line is smaller than that of the second radiating component.
4. A millimeter wave antenna according to claim 3, characterized in that: the distance between the second parasitic microstrip line and the first radiation component is one eighth to one half wavelength; the distance between the third parasitic microstrip line and the second radiation component is between one eighth and one half wavelength.
5. The millimeter-wave antenna of claim 4, wherein: the second parasitic microstrip line is positioned in the middle of the first radiation component in the length direction; the third parasitic microstrip line is positioned in the middle of the second radiation component in the length direction.
6. The millimeter-wave antenna of claim 1, wherein: the first radiating component comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
7. The millimeter-wave antenna of claim 1, wherein: the second radiating component comprises more than one radiating element in the form of a patch, which radiating elements are fed in series.
8. The millimeter-wave antenna of claim 1, wherein: the first parasitic microstrip line and the second parasitic microstrip line are equal-width lines and have the same width.
9. A millimeter wave antenna according to claim 3, characterized in that: the third parasitic microstrip line is an equal-width line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121968515.2U CN215497072U (en) | 2021-08-20 | 2021-08-20 | Millimeter wave antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121968515.2U CN215497072U (en) | 2021-08-20 | 2021-08-20 | Millimeter wave antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215497072U true CN215497072U (en) | 2022-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121968515.2U Active CN215497072U (en) | 2021-08-20 | 2021-08-20 | Millimeter wave antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215497072U (en) |
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2021
- 2021-08-20 CN CN202121968515.2U patent/CN215497072U/en active Active
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