CN210668682U - Double-frequency double-circular polarization microstrip patch antenna - Google Patents
Double-frequency double-circular polarization microstrip patch antenna Download PDFInfo
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- CN210668682U CN210668682U CN201921762278.7U CN201921762278U CN210668682U CN 210668682 U CN210668682 U CN 210668682U CN 201921762278 U CN201921762278 U CN 201921762278U CN 210668682 U CN210668682 U CN 210668682U
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- circular
- polarization microstrip
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Abstract
The utility model discloses a dual-frequency dual-circular polarization microstrip patch antenna, which comprises a dielectric substrate and a radiation patch arranged on the dielectric substrate, wherein the radiation patch is of a rectangular structure; four edges of the radiation patch are respectively provided with a patch groove; and a feed point is also arranged on the radiation patch and is positioned on the diagonal line of the radiation patch. The utility model discloses simple structure integrates the degree height, can realize dual-frenquency and two circular polarization characteristics simultaneously, improves work efficiency, improves the interference killing feature to can realize the matching of impedance bandwidth and 3dB axial ratio bandwidth.
Description
Technical Field
The utility model relates to a two circular polarization microstrip patch antenna of dual-frenquency.
Background
At present, with the continuous development of the mobile communication industry, especially the rapid progress of the millimeter wave technology, the requirements for integration, miniaturization and easy conformation of the antenna are higher and higher, and the patch antenna is widely concerned in the industry due to the characteristics of low profile, integration, easy array assembly and the like. However, the conventional patch antenna has low integration degree, low working efficiency, poor circular polarization performance and weak interference resistance.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide a dual-frenquency dual circular polarization microstrip patch antenna, its simple structure integrates the degree height, can realize dual-frenquency and dual circular polarization characteristic simultaneously, improves work efficiency, improves the interference killing feature to can realize the matching of impedance bandwidth and 3dB axial ratio bandwidth.
In order to solve the technical problem, the technical scheme of the utility model is that: a dual-frequency dual-circular polarization microstrip patch antenna comprises a dielectric substrate and a radiation patch arranged on the dielectric substrate,
the radiation patch is of a rectangular structure;
four edges of the radiation patch are respectively provided with a patch groove;
and a feed point is also arranged on the radiation patch and is positioned on the diagonal line of the radiation patch.
Furthermore, the dual-frequency dual-circular polarization microstrip patch antenna adopts a coaxial back feed feeding mode.
Further provides a material of the dielectric substrate, and the material of the dielectric substrate is FR4_ epoxy.
Further, the dielectric constant of the dielectric substrate is 4.4, and the dielectric loss is 0.02.
Further, the thickness of the medium substrate is 1.6 mm.
Furthermore, the patch groove is of a rectangular structure, and the length direction of the patch groove is perpendicular to the edge where the patch groove is located.
There is further provided a dimension of the radiation patch, the radiation patch having a length L of 28.2mm and a width W of 26.5 mm.
Further, the patch slots comprise a first patch slot, a second patch slot, a third patch slot and a fourth patch slot which are distributed in sequence anticlockwise;
the first patch groove corresponds to the side of the radiation patch with the length of L;
the width a of the first patch groove and the second patch groove is 1.48 mm;
the width b of the third patch slot and the fourth patch slot is 2.2 mm;
the length L1 of the first patch slot is 3.2 mm;
the length L2 of the second patch groove is 3.2 mm;
the length L3 of the third patch groove is 6 mm;
the length L4 of the fourth patch groove is 3.5 mm.
Further, the dielectric substrate is of a rectangular structure.
After the technical scheme is adopted, four edges of the radiation patch are respectively provided with a patch slot, asymmetric disturbance is generated through the patch slots with different lengths to realize double circular polarization characteristics, the feed point is positioned on a diagonal line of the radiation patch, a coaxial back feed mode is adopted to realize double frequency characteristics, and the length of each patch slot is adjusted to enable the impedance bandwidth of the double frequency double circular polarization microstrip patch antenna to be matched with the 3db axial ratio bandwidth. Under the condition of keeping a simple structure, the dual-frequency and dual-circular polarization characteristics are realized simultaneously, and further the working efficiency, the anti-interference capability and the integration degree of the dual-frequency dual-circular polarization microstrip patch antenna are improved.
Drawings
Fig. 1 is a schematic structural view of a dual-band dual-circular-polarization microstrip patch antenna of the present invention;
fig. 2 is a top view of the dual-band dual-circular-polarization microstrip patch antenna of the present invention;
fig. 3 is an S11 parameter diagram of the dual-band dual-circular-polarization microstrip patch antenna of the present invention;
fig. 4 is the axial ratio variation curve diagram of the dual-band dual-circular-polarization microstrip patch antenna of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1 and 2, a dual-band dual-circular polarization microstrip patch antenna comprises a dielectric substrate 1 and a radiation patch 2 disposed on the dielectric substrate 1, wherein,
the radiation patch 2 is of a rectangular structure;
four edges of the radiation patch 2 are respectively provided with a patch slot, asymmetric disturbance is generated through the patch slots with different lengths to realize double circular polarization characteristics, the anti-interference capability is further improved, and the length of each patch slot is adjusted to enable the impedance bandwidth of the double-frequency double circular polarization microstrip patch antenna to be matched with the 3db axial ratio bandwidth;
the radiation patch 2 is also provided with a feed point 3, and the feed point 3 is positioned on a diagonal line of the radiation patch 2 so as to realize double-frequency characteristics and further improve the working efficiency; in this embodiment, the dielectric substrate 1 has a single-layer structure.
In this embodiment, the dual-frequency dual-circular-polarization microstrip patch antenna adopts a coaxial feedback feeding manner, and the characteristic impedance of the dual-frequency dual-circular-polarization microstrip patch antenna is 50 Ω.
In this embodiment, the material of the dielectric substrate 1 is FR4_ epoxy; the dielectric constant of the dielectric substrate 1 is 4.4, and the dielectric loss is 0.02; the thickness of the dielectric substrate 1 may be 1.6 mm.
As shown in fig. 1 and 2, the patch slot may have a rectangular structure and a length direction of the patch slot is perpendicular to an edge portion thereof.
As shown in fig. 1 and 2, the radiating patch 2 has a length L of 28.2mm and a width W of 26.5 mm.
As shown in fig. 1 and 2, the patch slots include a first patch slot 4, a second patch slot 5, a third patch slot 6 and a fourth patch slot 7 which are distributed in sequence counterclockwise;
the first patch slot 4 corresponds to the side of the radiation patch 2 with the length of L;
in the present embodiment, the width a of the first patch slot 4 and the second patch slot 5 is 1.48 mm;
the width b of the third patch slot 6 and the fourth patch slot 7 is 2.2 mm;
the length L1 of the first patch groove 4 is 3.2 mm;
the length L2 of the second patch groove 5 is 3.2 mm;
the length L3 of the third patch groove 6 is 6 mm;
the length L4 of the fourth patch slot 7 is 3.5 mm.
As shown in fig. 2, in the present embodiment, the distance P1 between the feeding point 3 and the first patch slot 4 is about 4.5mm in the direction perpendicular to the upper edge portion of the radiation patch 2; the distance P2 between the feed point 3 and the second patch slot 5 in a direction perpendicular to the left edge of the radiating patch 2 is about 4.5 mm.
As shown in fig. 1 and 2, the dielectric substrate 1 has a rectangular structure.
As shown in fig. 3, the two frequency bands of the dual-frequency dual-circular-polarization microstrip patch antenna with the S11 parameter below-10 dB are 2.37 GHz-2.46 GHz and 4.75 GHz-4.92 GHz, and the impedance bandwidth reaches 10.6%; as shown in FIG. 4, the 3dB axial ratio bandwidth of the dual-frequency dual-circular-polarization microstrip patch antenna is 2.16 GHz-2.79 GHz and 4.69 GHz-5.38 GHz, and better matching with the dual-frequency band with S11 parameter below-10 dB is realized, and the simulation result based on HFSS shows that the utility model discloses can realize dual-frequency and dual-circular polarization characteristic when guaranteeing simple structure.
The working principle of the utility model is as follows:
four side parts of the radiation patch 2 are respectively provided with a patch slot, asymmetric disturbance is generated through the patch slots with different lengths to realize double circular polarization characteristics, the feed point 3 is positioned on a diagonal line of the radiation patch 2, a coaxial back feed feeding mode is adopted to realize double-frequency characteristics, and the length of each patch slot is adjusted to enable the impedance bandwidth of the double-frequency double circular polarization microstrip patch antenna to be matched with the 3db axial ratio bandwidth. Under the condition of keeping a simple structure, the dual-frequency and dual-circular polarization characteristics are realized simultaneously, and further the working efficiency, the anti-interference capability and the integration degree of the dual-frequency dual-circular polarization microstrip patch antenna are improved.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (9)
1. A dual-frequency dual-circular polarization microstrip patch antenna is characterized by comprising a dielectric substrate (1) and a radiation patch (2) arranged on the dielectric substrate (1), wherein,
the radiation patch (2) is of a rectangular structure;
four edges of the radiation patch (2) are respectively provided with a patch groove;
the radiating patch (2) is further provided with a feed point (3), and the feed point (3) is located on a diagonal line of the radiating patch (2).
2. The dual-band dual-circular-polarization microstrip patch antenna according to claim 1, wherein the dual-band dual-circular-polarization microstrip patch antenna employs a coaxial backfeed feed mode.
3. The dual-band dual-circular polarization microstrip patch antenna according to claim 1, wherein the dielectric substrate (1) is made of FR4 epoxy.
4. The dual-band dual-circular-polarization microstrip patch antenna according to claim 3, wherein the dielectric substrate (1) has a dielectric constant of 4.4 and a dielectric loss of 0.02.
5. The dual-band dual-circular-polarization microstrip patch antenna according to claim 1, wherein the dielectric substrate (1) has a thickness of 1.6 mm.
6. The dual-band dual-circularly polarized microstrip patch antenna according to claim 1,
the patch groove is of a rectangular structure, and the length direction of the patch groove is perpendicular to the edge where the patch groove is located.
7. The dual-band dual-circular-polarization microstrip patch antenna according to claim 6, wherein the radiating patch (2) has a length L of 28.2mm and a width W of 26.5 mm.
8. The dual-band dual-circularly polarized microstrip patch antenna according to claim 7,
the patch grooves comprise a first patch groove (4), a second patch groove (5), a third patch groove (6) and a fourth patch groove (7) which are distributed in sequence anticlockwise;
the first patch groove (4) corresponds to the side of the radiation patch (2) with the length of L;
the width a of the first patch groove (4) and the second patch groove (5) is 1.48 mm;
the width b of the third patch groove (6) and the fourth patch groove (7) is 2.2 mm;
the length L1 of the first patch groove (4) is 3.2 mm;
the length L2 of the second patch groove (5) is 3.2 mm;
the length L3 of the third patch groove (6) is 6 mm;
the length L4 of the fourth patch groove (7) is 3.5 mm.
9. The dual-band dual-circular-polarization microstrip patch antenna according to claim 1, wherein the dielectric substrate (1) has a rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762278.7U CN210668682U (en) | 2019-10-21 | 2019-10-21 | Double-frequency double-circular polarization microstrip patch antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762278.7U CN210668682U (en) | 2019-10-21 | 2019-10-21 | Double-frequency double-circular polarization microstrip patch antenna |
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| Publication Number | Publication Date |
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| CN210668682U true CN210668682U (en) | 2020-06-02 |
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| CN201921762278.7U Expired - Fee Related CN210668682U (en) | 2019-10-21 | 2019-10-21 | Double-frequency double-circular polarization microstrip patch antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336020A (en) * | 2021-12-24 | 2022-04-12 | 杭州电子科技大学 | Broadband circularly polarized antenna array based on asymmetric slotted rectangular patch |
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2019
- 2019-10-21 CN CN201921762278.7U patent/CN210668682U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336020A (en) * | 2021-12-24 | 2022-04-12 | 杭州电子科技大学 | Broadband circularly polarized antenna array based on asymmetric slotted rectangular patch |
| CN114336020B (en) * | 2021-12-24 | 2024-03-01 | 杭州电子科技大学 | Broadband circularly polarized antenna array based on asymmetric slotted rectangular patch |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20201021 |