CN210607637U - Microstrip slot patch antenna - Google Patents
Microstrip slot patch antenna Download PDFInfo
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- CN210607637U CN210607637U CN201922135106.3U CN201922135106U CN210607637U CN 210607637 U CN210607637 U CN 210607637U CN 201922135106 U CN201922135106 U CN 201922135106U CN 210607637 U CN210607637 U CN 210607637U
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Abstract
The utility model discloses a microstrip gap patch antenna includes the dielectric layer and lays in the radiation paster on a dielectric layer surface, the radiation paster is rectangle foil four angles of radiation paster respectively set up an L style of calligraphy gap. The utility model discloses a microstrip gap patch antenna can increase antenna gain effectively.
Description
Technical Field
The utility model relates to the technical field of antennas, concretely relates to microstrip gap patch antenna.
Background
The concept of microstrip antennas was first proposed by deschamamps in 1953. As shown in FIG. 1, the microstrip antenna is formed by laying a metal radiating plate 13 on one side of a dielectric substrate 12 whose thickness is much smaller than the operating wavelength, and laying a metal thin layer 14 on the other side of the dielectric substrate as a grounding plate. The metal radiating plate 13 can be designed into various shapes according to different requirements. Microstrip antennas have been widely used in the fields of communications, radars, etc. due to their advantages of light weight, small size, easy manufacture, etc., however, microstrip antennas also have their own disadvantages, such as narrow bandwidth, low gain, etc. In view of the above disadvantages, the prior art generally realizes gain improvement through an antenna array, which increases the size of the whole antenna.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a microstrip gap patch antenna can increase antenna gain effectively.
In order to achieve the above object, the utility model provides a microstrip gap patch antenna, include the dielectric layer and lay in the radiation paster of a dielectric layer surface, the radiation paster is rectangle foil four angles of radiation paster respectively set up an L style of calligraphy gap.
The microstrip slot patch antenna further comprises a microstrip feeder line, wherein the microstrip feeder line and the radiation patch are laid on the same surface of the dielectric layer, and one end of the microstrip feeder line is connected with the radiation patch; two parallel grooves are arranged between the microstrip feeder line and the radiation patch along the length direction of the microstrip feeder line, the long side of the L-shaped gap is perpendicular to the grooves, and the short side of the L-shaped gap is parallel to the grooves.
The microstrip slot patch antenna has the advantages that the four L-shaped slots are completely the same in structure.
The microstrip slot patch antenna has the L-shaped slot with the long side dimension of 1.86mm multiplied by 0.2mm and the short side dimension of 0.96mm multiplied by 0.2 mm.
In the microstrip slot patch antenna, the microstrip feed line is a quarter-wavelength impedance transformer.
In the microstrip slot patch antenna, the microstrip feeder is strip-shaped, the length is 3.18mm, and the width is 0.18 mm.
The microstrip slot patch antenna further comprises a fifty-ohm microstrip, and the other end of the microstrip feeder line is connected with the fifty-ohm microstrip.
Compared with the prior art, the beneficial effects of the utility model are that:
the microstrip patch antenna of the utility model adds four L-shaped gaps at proper positions by changing the structure of the patch, thereby effectively increasing the gain of the microstrip patch antenna; the utility model discloses a microstrip gap paster antenna can be applied to the on-vehicle radar system of millimeter wave, and the function is practical, is fit for being extensively promoted.
Drawings
The microstrip slot patch antenna of the present invention is provided by the following embodiments and drawings.
Fig. 1 is a perspective view of a microstrip patch antenna of the prior art.
Fig. 2 is a perspective view of a microstrip slot patch antenna according to a preferred embodiment of the present invention.
Fig. 3 is a front view of a microstrip slot patch antenna according to a preferred embodiment of the present invention.
Fig. 4 is a simulation diagram of return loss of the microstrip slot patch antenna according to the present embodiment.
Fig. 5 is a simulation diagram of the gain of the microstrip slot patch antenna according to the present embodiment.
Fig. 6 shows a simulation diagram of the gain of a microstrip patch antenna of the prior art.
Detailed Description
The microstrip slot patch antenna of the present invention will be described in further detail with reference to fig. 2 to 6.
Fig. 2 is a perspective view of a microstrip slot patch antenna according to a preferred embodiment of the present invention; fig. 3 is a front view of a microstrip slot patch antenna according to a preferred embodiment of the present invention.
Referring to fig. 2 and 3, the microstrip slot patch antenna of the present embodiment includes a dielectric layer 1, a radiation patch 2, a ground plate 9, a microstrip feed line 8, and a fifty-ohm microstrip 7;
the radiation patch 2, the microstrip feeder line 8 and the fifty-ohm microstrip 7 are laid on the upper surface of the dielectric layer 1; the grounding plate 9 is laid on the lower surface of the dielectric layer 1; one end of the microstrip feeder line 8 is connected with the radiation patch 2, and the other end of the microstrip feeder line is connected with the fifty-ohm microstrip 7; a first slot 10 and a second slot 11 are arranged between the microstrip feeder line 8 and the radiation patch 2, and the first slot 10 and the second slot 11 are parallel to each other and parallel to the length direction of the microstrip feeder line 8; the radiation patch 2 is a rectangular metal sheet, and L-shaped gaps, namely an L-shaped gap 3, an L-shaped gap 4, an L-shaped gap 5 and an L-shaped gap 6 are respectively formed in four corners of the radiation patch 2.
In the embodiment, the dielectric layer 1 is a rectangular plate structure, and the upper surface and the lower surface of the dielectric layer are both rectangular; the grounding plate 9 is a rectangular metal sheet, and the area of the grounding plate 9 is equal to the area of the lower surface of the dielectric layer 1, namely, the grounding plate 9 covers the lower surface of the dielectric layer 1 completely after being laid on the lower surface of the dielectric layer 1.
Referring to fig. 3, the L-shaped gaps at four corners of the radiation patch 2 all satisfy: the long side of the L-shaped slit is perpendicular to the first groove 10, and the short side of the L-shaped slit is parallel to the first groove 10. The L-shaped gap structures at four corners of the radiation patch 2 are completely the same.
In this embodiment, the microstrip feed line 8 is a quarter-wavelength impedance transformer, and is in the shape of a strip. One side of the radiation patch 2 is provided with a groove, one end of the microstrip feeder line 8 is arranged in the groove, the short edge of the end is connected with the radiation patch 2, the long edge of the end is spaced from the radiation patch 2 by a certain distance, and a first groove 10 and a second groove 11 which are parallel to each other are formed between the microstrip feeder line 8 and the radiation patch 2.
In this embodiment, the fifty-ohm microstrip 7 is a rectangular metal sheet.
In this embodiment, the dielectric layer 1 is made of a Rogers RT5880 insulating material, and the RT5880 has good insulation. The dielectric layer 1 is 15mm long, 15mm wide and 0.25mm high.
The radiation patch 2 and the grounding plate 9 are made of copper, and the copper has good conductivity. The radiation patch 2 is 5.6mm long and 3.8mm wide.
In this embodiment, the long side of the L-shaped slit is 1.86mm × 0.2mm, and the short side is 0.96mm × 0.2 mm.
In this embodiment, the dimensions of the first groove 10 and the second groove 11 are: 1.4mm (length) × 0.18mm (width).
In this embodiment, the microstrip feed line 8 has a length of 3.18mm and a width of 0.18 mm. The fifty ohm microstrip 7 is 2.42mm long and 0.86mm wide.
Fig. 4 is a simulation diagram of return loss of the microstrip slot patch antenna according to the present embodiment; fig. 5 is a simulation diagram of the gain of the microstrip slot patch antenna according to the present embodiment; fig. 6 shows a simulation diagram of the gain of a microstrip patch antenna of the prior art. As can be seen from fig. 4 to 6, compared with the microstrip patch antenna without the "L" slot, the gain of the microstrip slot patch antenna of the present embodiment is improved while the bandwidth is kept stable, the design and optimization are performed through simulation, meanwhile, the scanning frequency 23GHz to 25GHz band is added to observe the performance parameters of the antenna, the return loss and the gain of the antenna under the frequency band are analyzed, the gain of the antenna is 8.98dB at the resonant frequency 24GHz, and the gain is improved by about 0.8dB compared with the millimeter wave microstrip patch antenna without the "L" slot.
The microstrip slot patch antenna of the embodiment works in a millimeter wave frequency band, and the performance of the antenna is improved by adding L-shaped slots at four corners of the radiation patch. In the actual design process, the size and the position of the L-shaped gap are continuously optimized to realize good impedance matching and improve the gain of the microstrip patch antenna. In addition, a quarter-wave impedance converter is added at the tail end of the radiation patch to realize the impedance matching of the whole microstrip patch antenna. The microstrip slot patch antenna of the embodiment can be well applied to a vehicle-mounted millimeter wave radar system.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (7)
1. The microstrip slot patch antenna comprises a dielectric layer and a radiation patch laid on one surface of the dielectric layer, and is characterized in that the radiation patch is a rectangular metal sheet, and L-shaped slots are respectively formed in four corners of the radiation patch.
2. The microstrip slot patch antenna according to claim 1, wherein said microstrip slot patch antenna further comprises a microstrip feed line, said microstrip feed line and said radiation patch being laid on the same surface of said dielectric layer, one end of said microstrip feed line being connected to said radiation patch; two parallel grooves are arranged between the microstrip feeder line and the radiation patch along the length direction of the microstrip feeder line, the long side of the L-shaped gap is perpendicular to the grooves, and the short side of the L-shaped gap is parallel to the grooves.
3. The microstrip slot patch antenna according to claim 1 or 2, wherein the four L-shaped slot structures are identical.
4. The microstrip slot patch antenna according to claim 3 wherein the L-shaped slot has a long dimension of 1.86mm x 0.2mm and a short dimension of 0.96mm x 0.2 mm.
5. The microstrip slot patch antenna according to claim 2, wherein the microstrip feed is a quarter wave impedance transformer.
6. The microstrip slot patch antenna according to claim 2 wherein the microstrip feed line is strip shaped, 3.18mm long and 0.18mm wide.
7. The microstrip slot patch antenna according to claim 2, wherein said microstrip slot patch antenna further comprises a fifty ohm microstrip, said microstrip feed line having another end connected to said fifty ohm microstrip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135106.3U CN210607637U (en) | 2019-12-03 | 2019-12-03 | Microstrip slot patch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135106.3U CN210607637U (en) | 2019-12-03 | 2019-12-03 | Microstrip slot patch antenna |
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| Publication Number | Publication Date |
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| CN210607637U true CN210607637U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922135106.3U Active CN210607637U (en) | 2019-12-03 | 2019-12-03 | Microstrip slot patch antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665273A (en) * | 2022-03-10 | 2022-06-24 | 中国电子科技南湖研究院 | Dual-band millimeter wave planar antenna |
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2019
- 2019-12-03 CN CN201922135106.3U patent/CN210607637U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665273A (en) * | 2022-03-10 | 2022-06-24 | 中国电子科技南湖研究院 | Dual-band millimeter wave planar antenna |
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