CN211629297U - Low-profile broadband antenna - Google Patents
Low-profile broadband antenna Download PDFInfo
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- CN211629297U CN211629297U CN202020504458.1U CN202020504458U CN211629297U CN 211629297 U CN211629297 U CN 211629297U CN 202020504458 U CN202020504458 U CN 202020504458U CN 211629297 U CN211629297 U CN 211629297U
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Abstract
The utility model discloses a low-profile broadband antenna, including parallel arrangement's radiation layer, first dielectric layer and second dielectric layer in proper order, be provided with the feed probe in the first dielectric layer, be provided with the feed network in the second dielectric layer, the feed probe with the output port electric connection of feed network, its characterized in that: the feed probe comprises a feed probe vertical branch, a feed probe horizontal branch and a feed probe vertical branch section; one end of the vertical branch of the feed probe is connected with one end of the horizontal branch of the feed probe, and the other end of the vertical branch of the feed probe is electrically connected with an output port of the feed network; and the feeding probe vertical branch section is arranged below the feeding probe horizontal branch and is close to the other end of the probe horizontal branch. The utility model discloses the work bandwidth of low section broadband antenna can reach 55%, and structural strength is good simultaneously.
Description
Technical Field
The utility model relates to an antenna structure belongs to communication technology field.
Background
As a microstrip antenna, the L-shaped probe feeding is the most effective method for improving the working bandwidth and the radiation efficiency of the antenna, but even the working bandwidth can only reach the level of about 35 percent, and meanwhile, the mechanical structure is poor in strength due to the fact that the power air medium is adopted for filling, and the microstrip antenna cannot be used in many environments.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, and provide a cross polarization component that reduces the antenna, improve the low section broadband antenna of the standing wave bandwidth of antenna.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a low-profile broadband antenna, includes parallel arrangement's radiation layer, first dielectric layer and second dielectric layer in proper order, is provided with the feed probe in first dielectric layer, is provided with the feed network in the second dielectric layer, the feed probe with the output port electric connection of feed network, its characterized in that: the feed probe comprises a feed probe vertical branch, a feed probe horizontal branch and a feed probe vertical branch section; one end of the vertical branch of the feed probe is connected with one end of the horizontal branch of the feed probe, and the other end of the vertical branch of the feed probe is electrically connected with an output port of the feed network; and the feeding probe vertical branch section is arranged below the feeding probe horizontal branch and is close to the other end of the probe horizontal branch.
The vertical branch of the feed probe adopts a cone gradual change structure, one end connected with the horizontal branch of the feed probe is a large end, and the other end connected with an output port of a feed network is a small end.
The horizontal branch of the feed probe adopts a conical plane structure, and the width of one end connected with the vertical branch of the feed probe is large.
The vertical branch section of the feed probe is a plane metal sheet.
The radiation layer is a metal patch; and an antenna housing is also arranged on the metal patch.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the antenna housing is located the superiors of antenna, and the antenna housing adopts the medium structure to be used for protecting the antenna as full conformal antenna house, can improve the standing wave bandwidth of antenna simultaneously. The first dielectric layer adopts two dielectric plates of an upper substrate and a lower substrate, and the two dielectric plates clamp the feed probe and are used for supporting the antenna radiation metal sheet, reducing the height of the antenna section and increasing the integral strength of the antenna; due to the adoption of the three-layer dielectric structure, the mechanical strength of the antenna is improved, and the whole height is further reduced.
2. The vertical branch of the feed probe adopts a cylindrical conical structure with a thin lower part and a thick upper part; by utilizing the difference of the upper and lower calibers of the frustum, the parameters of impedance optimization are increased, and the low-frequency standing wave characteristic of the antenna is improved; the lower end of the vertical branch of the feed probe is connected with the output port of the broadband phase-stabilizing network in a welding way.
3. The horizontal branch of the feed probe adopts a gradually-changed metal sheet structure with thick edges and thin center; the difference of the widths of the two sides of the gradually-changed metal sheet structure is utilized, so that impedance optimization parameters are increased, and the high-frequency standing wave characteristic of the antenna is improved; the horizontal branch is connected with the upper end of the vertical branch of the feed probe in a welding way.
4. A rectangular metal sheet branch section is arranged near the tail end of the horizontal branch of the feed probe; the impedance characteristic of the antenna can be finely adjusted by utilizing the branch structure, standing waves are improved, meanwhile, a tiny vertical polarization component can be introduced, the vertical polarization component introduced by the vertical branch of the feed probe can be compensated due to the opposite current directions, the cross polarization component of the antenna is finally reduced, and the upper end of the branch and the horizontal branch of the feed probe are welded and connected by adopting a gradually-changed metal sheet structure with thick edges and thin center.
5. The utility model discloses the work bandwidth can reach 55%, and structural strength is good simultaneously, is suitable for batch production and debugging, and exempts from to adorn conventional antenna house, is suitable for as conformal antenna array unit.
Drawings
Fig. 1 is a schematic structural diagram of the antenna of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is an exploded view of the structure of FIG. 1;
FIG. 4 is a diagram of the antenna dielectric layer and feed probe;
FIG. 5 is a schematic diagram of the structure of the feed probe;
FIG. 6 is a top view of the feed probe;
FIG. 7 is an overall view of a broadband phase-stabilized feed network;
FIG. 8 is a structure diagram of a broadband phase-stabilized feeding network strip line;
fig. 9 shows a standing wave pattern of the antenna according to the present invention;
FIG. 10 is a graph of the standing wave of an antenna corresponding to the conventional structure;
FIG. 11 is a cross-polarization diagram corresponding to the present invention;
FIG. 12 is a cross-polarization diagram corresponding to the conventional structure;
wherein: 1. a first dielectric layer; 11. a first dielectric substrate; 111. a first upper substrate; 112. a first lower substrate; 12. a feed probe; 121. the feed probe is horizontally divided; 122. the branch feed probe is vertically branched; 123. a feed probe vertical branch section; 2. a second dielectric layer; 21. a second dielectric substrate; 221. a second upper substrate; 222. a second lower substrate; 22. a broadband phase-stable feed network; 3. a radiation layer; 4. an antenna cover; 5. A pad hole; 6. metallizing the via hole; 7. an SMA connector bore; 8. a resistive hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1-3, the antenna structure of the present invention is a layered structure, and includes, from top to bottom, an antenna housing 4, a radiation layer 3, a first dielectric layer 1, and a second dielectric layer 2. The radiation layer 3 is a metal patch.
Fig. 4-6 are schematic structural diagrams of the first dielectric layer, and the first dielectric layer 1 includes a first dielectric substrate 11 and a feeding probe 12 disposed on the dielectric substrate, where the feeding probe 12 includes a feeding probe horizontal branch 121, a feeding probe vertical branch 122, and a feeding probe vertical branch 123. The two feeding probe horizontal branches 121 are located on the upper surface of the first dielectric substrate 11. The feed probe horizontal branch 121 is a strip with a gradually decreasing width, the feed probe vertical branch 122 is located below the end with the largest width of the feed probe horizontal branch 121, the feed probe vertical branch 122 is conical, and the contact end with the feed probe horizontal branch 121 is a conical large end. The feed probe vertical leg 123 is located near the end of the feed probe horizontal leg 121 and extends a distance downward.
The first dielectric substrate 11 is composed of a first upper substrate 111 and a first lower substrate 112, and the feed probe 3 is fixed to the first upper substrate 111 and the first lower substrate 112.
Fig. 7 and 8 are schematic structural diagrams of a second dielectric layer, which includes a second dielectric substrate 21 and a broadband phase-stable feed network 22. The broadband phase-stabilizing feed network 22 is composed of a microstrip line and a metalized via hole 6 which are positioned on the second dielectric substrate 21. The second dielectric substrate 21 is composed of a second upper substrate 221 and a second lower substrate 222.
Fig. 9-12 are comparison graphs of the performance graphs of the antenna of the present invention and the conventional antenna, fig. 9 is a standing wave graph of the antenna corresponding to the present invention (the working bandwidth corresponding to the standing wave 2 is from 490MHz-755MHz to 265MHz total bandwidth); FIG. 10 shows the standing wave pattern of the antenna corresponding to the conventional structure (the operating bandwidth of the corresponding standing wave 2 is from 499MHz to 709MHz and then 210MHz bandwidth). Fig. 11 is a cross polarization diagram corresponding to the present invention (maximum value of the whole pitch angle range-35.7 dB), and a cross polarization diagram corresponding to the conventional structure of fig. 12 (maximum value of the whole pitch angle range-27.6 dB).
Compared with the traditional antenna structure, the utility model has the advantages that the standing wave bandwidth is obviously improved, the bandwidth is widened from 210MHz to 265MHz, and the cross polarization is obviously improved; the improvement is from-27.6 dB to-35.7 dB, and the improvement is about 8 dB.
Claims (5)
1. The utility model provides a low-profile broadband antenna, includes parallel arrangement's radiation layer, first dielectric layer and second dielectric layer in proper order, is provided with the feed probe in first dielectric layer, is provided with the feed network in the second dielectric layer, the feed probe with the output port electric connection of feed network, its characterized in that: the feed probe comprises a feed probe vertical branch, a feed probe horizontal branch and a feed probe vertical branch section; one end of the vertical branch of the feed probe is connected with one end of the horizontal branch of the feed probe, and the other end of the vertical branch of the feed probe is electrically connected with an output port of the feed network; and the feeding probe vertical branch section is arranged below the feeding probe horizontal branch and is close to the other end of the probe horizontal branch.
2. A low-profile broadband antenna according to claim 1, wherein: the vertical branch of the feed probe adopts a cone gradual change structure, one end connected with the horizontal branch of the feed probe is a large end, and the other end connected with an output port of a feed network is a small end.
3. A low-profile broadband antenna according to claim 1, wherein: the horizontal branch of the feed probe adopts a conical plane structure, and the width of one end connected with the vertical branch of the feed probe is large.
4. A low-profile broadband antenna according to claim 1, wherein: the vertical branch section of the feed probe is a plane metal sheet.
5. A low-profile broadband antenna according to claim 1, wherein: the radiation layer is a metal patch; and an antenna housing is also arranged on the metal patch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020504458.1U CN211629297U (en) | 2020-04-08 | 2020-04-08 | Low-profile broadband antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020504458.1U CN211629297U (en) | 2020-04-08 | 2020-04-08 | Low-profile broadband antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211629297U true CN211629297U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020504458.1U Active CN211629297U (en) | 2020-04-08 | 2020-04-08 | Low-profile broadband antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403911A (en) * | 2020-04-08 | 2020-07-10 | 南京步微信息科技有限公司 | Low-profile broadband antenna |
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2020
- 2020-04-08 CN CN202020504458.1U patent/CN211629297U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403911A (en) * | 2020-04-08 | 2020-07-10 | 南京步微信息科技有限公司 | Low-profile broadband antenna |
| CN111403911B (en) * | 2020-04-08 | 2023-09-08 | 南京步微信息科技有限公司 | Low-profile broadband antenna |
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