CN214336922U - Wide-bandwidth scanning angle antenna array - Google Patents
Wide-bandwidth scanning angle antenna array Download PDFInfo
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- CN214336922U CN214336922U CN202120177854.2U CN202120177854U CN214336922U CN 214336922 U CN214336922 U CN 214336922U CN 202120177854 U CN202120177854 U CN 202120177854U CN 214336922 U CN214336922 U CN 214336922U
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Abstract
The utility model discloses a wide bandwidth scanning angle antenna array relates to phased array antenna field, and two antenna elements in this antenna array are double-deck dipole antenna, and the both arms of each antenna element are printed on the front and the back of medium base plate symmetrically, and the back of medium base plate is still printed with the public ground of connecting two antenna elements, and the resonance unit that decouples is the open resonator ring and is located the back of medium base plate and is connected with public ground; according to the antenna array, the open resonant ring is arranged on the public ground to serve as the decoupling resonant unit, so that the isolation between the two antenna units can be restrained, the performance of a low frequency band of the antenna array is optimized, the scanning bandwidth of the antenna array is widened, and the antenna array directional pattern is improved.
Description
Technical Field
The utility model belongs to the technical field of phased array antenna and specifically relates to a wide bandwidth scanning angle antenna array.
Background
The patch antenna array has the advantages of low profile, light weight, easy processing and the like, so the patch antenna array is widely applied to the fields of military, civil use and the like. However, due to the limited array spacing, the antenna units are strongly coupled with each other, and the influence of the antenna mutual coupling on the array wide bandwidth scanning cannot be ignored, so that the mutual coupling deteriorates the isolation between the antenna units, introduces scanning blind spots, reduces the antenna gain, and influences the detection distance.
SUMMERY OF THE UTILITY MODEL
The inventor of the present invention has proposed a wide bandwidth scanning angle antenna array to above-mentioned problem and technical demand, the technical scheme of the utility model as follows:
a wide bandwidth scanning angle antenna array comprises a first antenna unit, a second antenna unit, a dielectric substrate and a decoupling resonance unit; the first antenna unit and the second antenna unit are both double-layer dipole antennas, two arms of each antenna unit are symmetrically printed on the front surface and the back surface of the dielectric substrate, the common ground for connecting the two antenna units is further printed on the back surface of the dielectric substrate, and the decoupling resonance unit is an open resonance ring, is located on the back surface of the dielectric substrate and is connected with the common ground.
The decoupling resonance unit is an open resonance ring formed by microstrip lines.
The further technical scheme is that the decoupling resonance unit is in a U-shaped structure.
The decoupling resonance unit is positioned between the first antenna unit and the second antenna unit.
The further technical scheme is that the dielectric constant of the dielectric substrate is 4.4, and the thickness of the dielectric substrate is 0.8 mm.
The utility model has the beneficial technical effects that:
the application discloses a wide-bandwidth scanning angle antenna array, wherein an open resonant ring is arranged on a public ground of the antenna array to serve as a decoupling resonant unit, so that the isolation between two antenna units can be restrained, the performance of a low frequency band of the antenna array is optimized, the scanning bandwidth of the antenna array is widened, and the directional diagram of the antenna array is improved. And the decoupling resonance unit has smaller size, can be arranged between the antenna units, and has the advantages of simple processing, easy realization and lower cost.
Drawings
Fig. 1 is a schematic perspective view of a front and back side structure of a wide bandwidth scanning angle antenna array according to the present application.
Figure 2 is a schematic front view of the wide bandwidth scanning angle antenna array of the present application.
Figure 3 is a reverse schematic view of the wide bandwidth scanning angle antenna array of the present application.
Figure 4 is a schematic diagram of an isolation contrast curve between the wide bandwidth scanning angle antenna array of the present application and a conventional antenna array.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
Referring to fig. 1, the wide bandwidth scanning angle antenna array includes a first antenna unit 1, a second antenna unit 2, a dielectric substrate 3, and a decoupling resonance unit 4. The first antenna unit 1 and the second antenna unit 2 are both double-layer dipole antennas, each antenna unit includes two antenna arms, the two arms of each antenna unit are symmetrically printed on the front surface and the back surface of the dielectric substrate 3, fig. 1 is a schematic diagram of the front surface, a solid line represents a circuit structure printed on the front surface of the dielectric substrate 3, and a dotted line represents a circuit structure printed on the back surface of the dielectric substrate 3. Referring to the front schematic view of the dielectric substrate 3 shown in fig. 2 and the back schematic view of the dielectric substrate 3 shown in fig. 3, the two arms 11 and 12 of the first antenna unit 1 are printed symmetrically, and the two arms 21 and 22 of the second antenna unit 2 are printed symmetrically. The back side of the dielectric substrate 3 is also printed with a common ground 5 connecting the two antenna elements. The dielectric substrate used in the present application was FR4, and had a dielectric constant of 4.4 and a thickness of 0.8 mm.
The decoupling resonance unit 4 is an open resonance loop and is positioned on the back surface of the dielectric substrate 3 and is connected with the common ground 5, and the decoupling resonance unit 4 can improve the isolation between the low frequency bands of the antenna unit.
In the present application, the decoupling resonance unit 4 is an open resonance loop formed by microstrip lines. Furthermore, the decoupling resonance unit 4 is in a U-shaped structure, has simple structure and easy processing,
the decoupling resonant unit 4 in this application is located between the first antenna element 1 and the second antenna element 2 due to the small size of the decoupling resonant unit 4 in this application.
Referring to a comparison curve shown in fig. 4, on the basis that the first antenna unit 1 and the second antenna unit 2 with the same structure are printed on the dielectric substrate 3, an isolation curve when the decoupling resonance unit 4 of the present application is not added is shown as a solid line in fig. 4, and an isolation curve after the decoupling resonance unit 4 is added by using the structure shown in fig. 1 of the present application is shown as a dotted line in fig. 4, it is shown by comparison that the structure provided by the present application can improve the isolation between the low frequency bands of the antenna units, and optimize the isolation to be less than-20 dB. In addition, the structure provided by the application widens the scanning bandwidth of the antenna array, and simulation shows that the antenna array can realize a scanning angle of +/-45 degrees and a bandwidth of 40 percent when the structure is adopted.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.
Claims (5)
1. A wide bandwidth scanning angle antenna array, characterized in that it comprises a first antenna element (1), a second antenna element (2), a dielectric substrate (3) and a decoupling resonance element (4); the first antenna unit (1) and the second antenna unit (2) are double-layer dipole antennas, two arms of each antenna unit are symmetrically printed on the front surface and the back surface of the medium substrate (3), a common ground (5) for connecting the two antenna units is further printed on the back surface of the medium substrate (3), and the decoupling resonance unit (4) is an open resonance ring and is located on the back surface of the medium substrate (3) and connected with the common ground (5).
2. The wide bandwidth scanning angle antenna array of claim 1, characterized in that the decoupling resonance unit (4) is an open resonance loop formed by microstrip lines.
3. The wide bandwidth scanning angle antenna array of claim 2, characterized in that the decoupling resonance units (4) are in a U-shaped structure.
4. The wide bandwidth scanning angle antenna array of claim 1, characterized in that the decoupling resonance unit (4) is located between the first antenna unit (1) and the second antenna unit (2).
5. The wide bandwidth scanning angle antenna array of any of claims 1-4, characterized in that the dielectric substrate (3) has a dielectric constant of 4.4 and a thickness of 0.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120177854.2U CN214336922U (en) | 2021-01-21 | 2021-01-21 | Wide-bandwidth scanning angle antenna array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120177854.2U CN214336922U (en) | 2021-01-21 | 2021-01-21 | Wide-bandwidth scanning angle antenna array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214336922U true CN214336922U (en) | 2021-10-01 |
Family
ID=77908879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120177854.2U Active CN214336922U (en) | 2021-01-21 | 2021-01-21 | Wide-bandwidth scanning angle antenna array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214336922U (en) |
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2021
- 2021-01-21 CN CN202120177854.2U patent/CN214336922U/en active Active
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