CN209766654U - Circularly polarized microstrip flat antenna - Google Patents
Circularly polarized microstrip flat antenna Download PDFInfo
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- CN209766654U CN209766654U CN201920504175.4U CN201920504175U CN209766654U CN 209766654 U CN209766654 U CN 209766654U CN 201920504175 U CN201920504175 U CN 201920504175U CN 209766654 U CN209766654 U CN 209766654U
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Abstract
The utility model discloses a circular polarization microstrip panel antenna belongs to the antenna field, including microstrip array antenna, first medium base plate, second medium base plate, third medium base plate, first metal level, second metal level, third metal, layer waveguide layer, microstrip line-waveguide transition ware. The microstrip array antenna comprises N antenna units with completely same structures, each antenna unit comprises four same metal rectangular patches, a pair of patches at diagonal positions are connected through additional metal strips, and vertical metal through holes are formed in each metal patch and the first dielectric substrate; the utility model discloses an antenna has realized antenna and active device's antarafacial structure, has reduced the loss and the interference of feeder, has reduced the influence of active network to the antenna, has advantages such as small, with low costs, high gain, high isolation.
Description
Technical Field
The utility model belongs to the antenna field specifically is an on-vehicle radar used circular polarization microstrip panel antenna.
Background
The antenna can be classified into linear polarization, circular polarization and elliptical polarization according to polarization characteristics, wherein the linear polarization antenna is most widely used. Compared with a linear polarization antenna, the circularly polarized antenna has the advantages of interference resistance, rain fog resistance and attenuation resistance, and strict directivity does not need to be met between the receiving and transmitting antennas. These advantages have led to great attention being paid to the study of circularly polarized antennas.
Compared with other antennas, the microstrip array antenna has a low profile, a small volume, and is easy to conform, and thus, the microstrip array antenna is widely used because of the easy acquisition of circular polarization characteristics. The principle of realizing microstrip circular polarization is to excite two linearly polarized waves with orthogonal polarization directions, equal amplitudes and 90-degree phase difference between a radiation patch and a reflecting plate, wherein the single feed point method has the defect of narrow axial ratio bandwidth, and the feed network structure of the multi-feed point method is complex and has large loss in a high frequency band, so the prior art needs to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a circular polarization microstrip panel antenna that has advantages such as high gain, little volume, receiving and dispatching isolation height, with low costs, reliable and stable.
Realize the utility model discloses the technical solution of purpose does: a circularly polarized microstrip flat antenna comprises a microstrip array antenna, a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a first metal layer, a second metal layer, a third metal layer, a waveguide layer, a microstrip line-waveguide transition device and a power divider.
The first dielectric substrate, the first metal layer, the second dielectric substrate, the second metal layer, the waveguide layer, the third metal layer and the third dielectric substrate are sequentially overlapped from top to bottom, a microstrip array antenna is arranged on one side, far away from the first metal layer, of the first dielectric substrate, vertical metal through holes are formed in the microstrip array antenna and the first dielectric substrate, and a gap is formed in the first metal layer; a metallized through hole is arranged on the second dielectric substrate to form a power divider, and a gap is arranged on the second metal layer; a grounding plate and a feeder line are arranged on one side of the third dielectric substrate far away from the third metal layer;
The microstrip line-waveguide transition device comprises a grounding plate, a third dielectric substrate, a third metal layer and a radiation patch.
The third dielectric substrate and the waveguide layer are used for energy transmission through the radiation patch of the microstrip line-waveguide transition device, the second dielectric substrate and the waveguide layer are used for energy transmission through the gap arranged on the second metal layer, and the microstrip array antenna and the first dielectric substrate are used for energy transmission through the gap arranged on the first metal layer.
Further, the microstrip array antenna comprises N antenna units with the same structure.
Furthermore, each antenna unit in the microstrip array antenna comprises 4 identical metal rectangular patches, the 4 patches are distributed in a pairwise equal interval with an interval of l, and a pair of patches at diagonal positions are connected through a metal strip;
Furthermore, each patch of the antenna unit and the first dielectric substrate are provided with a vertical metal through hole.
Compared with the prior art, the utility model, it is showing the advantage and is: by connecting the microstrip line-waveguide transition device with the waveguide, the non-coplanar structure of the antenna and the active device is realized, the loss and the interference of a feeder line are reduced, and the influence of an active network on the antenna is reduced; the square microstrip patch is adopted, the structure is improved, the antenna structure with high gain and high isolation is realized in a limited volume, and the microstrip patch antenna has the advantages of low cost, small volume and high performance.
Drawings
Fig. 1 is a three-dimensional perspective view of the circularly polarized microstrip patch antenna of the present invention.
Fig. 2 is the cross-sectional structure diagram of the circular polarization microstrip patch antenna of the present invention.
Fig. 3 is a detailed structural diagram of the circular polarization microstrip patch antenna of the present invention. Fig. a shows the structure of the microstrip array antenna 1 above the first dielectric substrate (S1), fig. b shows the structure on the first dielectric substrate (S1), fig. c shows the structure on the first metal layer (M1), fig. d shows the structure on the second dielectric substrate (S2), fig. e shows the structure on the second metal layer (M2), fig. f shows the structure of the waveguide layer (2), fig. g shows the structure on the third metal layer (M3), fig. h shows the structure on the third dielectric substrate (S3), and fig. i shows the microstrip feed line structure below the third dielectric substrate (S3).
Fig. 4 is a detailed structural diagram of the microstrip line-waveguide transition device (T) of the circularly polarized microstrip patch antenna of the present invention.
Fig. 5 is a parameter diagram of any antenna unit of the circularly polarized microstrip patch antenna according to an embodiment of the present invention.
Fig. 6 is a three-dimensional beam pattern of the circularly polarized microstrip patch antenna according to an embodiment of the present invention.
Fig. 7 is a two-dimensional beam pattern of the circularly polarized microstrip patch antenna according to an embodiment of the present invention.
Fig. 8 is an axial ratio diagram of the circularly polarized microstrip patch antenna according to the embodiment of the present invention.
Detailed Description
the present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 1 and 2, the utility model relates to a circular polarization microstrip panel antenna, which comprises a microstrip array antenna 1, a first dielectric substrate S1, a second dielectric substrate S2, a third dielectric substrate S3, a first metal layer M1, a second metal layer M2, a third metal layer M3, a waveguide layer 2, a microstrip line-waveguide transition device T, and a power divider D.
With reference to fig. 3, a first dielectric substrate S1, a first metal layer M1, a second dielectric substrate S2, a second metal layer M2, a waveguide layer 2, a third metal layer M3, and a third dielectric substrate S3 are sequentially stacked from top to bottom, a microstrip array antenna 1 is disposed on one side of the first dielectric substrate S1, which is far away from the first metal layer M1, vertical metal through holes are disposed on the microstrip array antenna 1 and the first dielectric substrate S1, and a slot is disposed on the first metal layer M1; a metallized through hole is arranged on the second dielectric substrate to form a power divider D, and a gap is arranged on the second metal layer M2; the ground plate G and the feeding line are disposed on the third dielectric substrate S3 on a side away from the third metal layer M3.
Referring to fig. 4, the microstrip-waveguide transition T2 includes a ground plate G, a third dielectric substrate S3, a third metal layer M3, and a radiation patch P.
The third dielectric substrate S3 and the waveguide layer 2 perform energy transmission through the radiation patch P of the microstrip line-waveguide transition device T, the second dielectric substrate S2 and the waveguide layer 2 perform energy transmission through the slot provided on the second metal layer M2, and the microstrip array antenna 1 and the first dielectric substrate S1 perform energy transmission through the slot provided on the first metal layer M1.
Further, the microstrip array antenna 1 includes N antenna elements having the same structure.
Furthermore, each antenna unit in the microstrip array antenna 1 comprises 4 identical metal rectangular patches, the 4 patches are distributed in a pairwise equal interval with an interval of l, and a pair of patches at diagonal positions are connected through metal strips;
Further, each of the patches of the antenna element and the first dielectric substrate S1 is provided with a vertical metal via.
Preferably, N is 4 and l is 0.05mm to 0.15 mm.
Preferably, the first dielectric substrate S1, the second dielectric substrate S2 and the third dielectric substrate S3 are model numbers Rogers3003 and have a thickness of 127 μm.
Preferably, the materials of the microstrip array antenna 1, the first metal layer M1, the second metal layer M2, the third metal layer M3 and the inner wall of the square hole of the waveguide layer 2 are all copper; the thickness of the microstrip array antenna 1, the first metal layer M1, the second metal layer M2 and the third metal layer M3 is 18 μ M, and the height of the waveguide layer 2 is 0.5 mm-2 mm.
Preferably, the diameter of each through hole of the microstrip line-waveguide transition device T is 0.15-0.3 mm, and the distance between the through holes is 0.2-0.4 mm; the diameter of each through hole of the power divider D is 0.3-0.5 mm, and the distance between the through holes is 0.5-0.7 mm; the diameter of the through holes on the microstrip array antenna 1 and the first dielectric substrate S1 is 0.2-0.3 mm.
the present invention will be described in further detail with reference to specific embodiments.
Examples
The embodiment of the utility model provides an in the center frequency of antenna be 77 GHz.
with reference to fig. 1, fig. 2 and fig. 4, the diameter of the through holes in the microstrip line-waveguide transition device T in this embodiment is 0.2mm, and the distance between the through holes is 0.33 mm. The diameter of each through hole in the power divider D is 0.4mm, and the distance between the through holes is 0.6 mm. The diameter of the through holes on the microstrip array antenna 1 and the first dielectric substrate S1 is 0.25 mm.
With reference to fig. 1, fig. 2 and fig. 5, the specific parameters of each antenna unit in the microstrip array antenna 1 in this embodiment are as follows: a 1-a 2-0.8 mm, b 1-b 2-0.09 mm, c 1-0.71 mm, c 2-0.75 mm, and d-0.1 mm.
In the embodiment, the length of the square hole of the first metal layer M1 is 1.5mm, and the width is 0.24 mm; the length of the square hole of the M2 of the second metal layer is 1mm, and the width of the square hole is 0.75 mm; the square hole of the third metal layer M3 had a length of 2.54mm and a width of 1.27 mm.
Referring to fig. 3c, the radiation patch placed in the center of the square hole in the third metal layer M3 in this embodiment has a length of 2.1mm and a width of 0.9 mm.
Right the utility model discloses a microstrip array antenna carries out the simulation test of receiving and dispatching antenna isolation, and the simulation result shows that, under 77 GHz's frequency, the isolation of antenna can reach 68 dB.
As can be seen from fig. 6 and 7, in this embodiment, the gain of the antenna is 11dB, the 3dB beamwidth is about 26 °, the main-lobe-to-side lobe ratio is greater than 13dB, and the maximum side lobe level occurs at theta equal to 66 °; as can be seen from fig. 8, the axial ratio of the antenna is about ± 18 ° compared to the 3dB beamwidth.
To sum up, the utility model discloses an antenna has realized the different face structure of antenna and active device, has reduced the loss and the interference of feeder, has reduced the influence of active network to the antenna, and can effectively restrain vice lamella through the metal patch, has advantages such as small, with low costs, high gain, low vice lamella, high isolation.
Claims (8)
1. A circularly polarized microstrip flat antenna is characterized by comprising a microstrip array antenna (1), a first dielectric substrate (S1), a second dielectric substrate (S2), a third dielectric substrate (S3), a first metal layer (M1), a second metal layer (M2), a third metal layer (M3), a waveguide layer (2), a microstrip line-waveguide transition device (T) and a power divider (D);
The microstrip array antenna comprises a first dielectric substrate (S1), a first metal layer (M1), a second dielectric substrate (S2), a second metal layer (M2), a waveguide layer (2), a third metal layer (M3) and a third dielectric substrate (S3), wherein the first dielectric substrate (S1) is sequentially overlapped from top to bottom, a microstrip array antenna (1) is arranged on one side, far away from the first metal layer (M1), of the first dielectric substrate (S1), vertical metal through holes are formed in the microstrip array antenna (1) and the first dielectric substrate (S1), and a gap is formed in the first metal layer (M1); a metallized through hole is arranged on the second dielectric substrate to form a power divider (D), and a gap is arranged on the second metal layer (M2); a grounding plate (G) and a feeder line are arranged on one side of the third dielectric substrate (S3) far away from the third metal layer (M3);
The microstrip line-waveguide transition device (T) comprises a ground plate (G), a third dielectric substrate (S3), a third metal layer (M3) and a radiation patch (P);
The third dielectric substrate (S3) and the waveguide layer (2) carry out energy transmission through a radiation patch (P) of the microstrip line-waveguide transition device (T), the second dielectric substrate (S2) and the waveguide layer (2) carry out energy transmission through a gap arranged on the second metal layer (M2), and the microstrip array antenna (1) and the first dielectric substrate (S1) carry out energy transmission through a gap arranged on the first metal layer (M1).
2. The circularly polarized microstrip panel antenna according to claim 1, characterized in that the microstrip array antenna (1) has N antenna elements of identical structure.
3. The circularly polarized microstrip panel antenna according to claim 2, wherein each antenna element of the microstrip array antenna (1) has 4 identical rectangular metal patches, 4 patches are distributed with equal spacing between each two patches, and the spacing is l, wherein a pair of patches at diagonal positions are connected by a metal strip.
4. the circularly polarized microstrip patch antenna according to claim 2 or 3, wherein each of the patches of the antenna element and the first dielectric substrate (S1) is provided with a vertical metal via.
5. The microstrip patch antenna according to claim 2 or 3, wherein N is 4 and l is 0.05mm to 0.15 mm.
6. The circularly polarized microstrip patch antenna according to claim 1, wherein the first dielectric substrate (S1), the second dielectric substrate (S2) and the third dielectric substrate (S3) have a dielectric constant of 3.04 and a thickness of 127 μm.
7. The circularly polarized microstrip patch antenna according to claim 1, wherein the microstrip array antenna (1), the first metal layer (M1), the second metal layer (M2), the third metal layer (M3) and the inner wall of the square hole of the waveguide layer (2) are all made of copper; the thickness of the microstrip array antenna (1), the first metal layer (M1), the second metal layer (M2) and the third metal layer (M3) is 18 microns, and the height of the waveguide layer (2) is 0.5 mm-2 mm.
8. The circularly polarized microstrip panel antenna according to claim 1, wherein the microstrip line-waveguide transition (T) has a via diameter of 0.15 to 0.3mm and a via-to-via spacing of 0.2 to 0.4 mm; the diameter of each through hole of the power divider (D) is 0.3-0.5 mm, and the distance between the through holes is 0.5-0.7 mm; the diameter of the through holes on the microstrip array antenna (1) and the first dielectric substrate (S1) is 0.2-0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504175.4U CN209766654U (en) | 2019-04-15 | 2019-04-15 | Circularly polarized microstrip flat antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504175.4U CN209766654U (en) | 2019-04-15 | 2019-04-15 | Circularly polarized microstrip flat antenna |
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| CN209766654U true CN209766654U (en) | 2019-12-10 |
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| CN201920504175.4U Active CN209766654U (en) | 2019-04-15 | 2019-04-15 | Circularly polarized microstrip flat antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498038A (en) * | 2022-01-24 | 2022-05-13 | 广东省蓝波湾智能科技有限公司 | Panel antenna and wireless network bridge |
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- 2019-04-15 CN CN201920504175.4U patent/CN209766654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498038A (en) * | 2022-01-24 | 2022-05-13 | 广东省蓝波湾智能科技有限公司 | Panel antenna and wireless network bridge |
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Effective date of registration: 20200107 Address after: 201206 second floor, t12b-ii, No. 615, ningqiao Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Shanghai geometry partner intelligent driving Co., Ltd Address before: 200438, room 4, building 4, building 135, Wei Lu, Yangpu District, Shanghai, Patentee before: Shanghai Hannway Technology Corporation, Ltd. |