CN108400443B - Choke coil structure and choke coil antenna - Google Patents
Choke coil structure and choke coil antenna Download PDFInfo
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- CN108400443B CN108400443B CN201810158841.3A CN201810158841A CN108400443B CN 108400443 B CN108400443 B CN 108400443B CN 201810158841 A CN201810158841 A CN 201810158841A CN 108400443 B CN108400443 B CN 108400443B
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- metal plate
- antenna
- choke
- shaped grooves
- choke coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Abstract
The invention relates to the technical field of satellite navigation antennas, and discloses a choke coil structure and a choke coil antenna, wherein the choke coil structure comprises a first metal plate, a second metal plate and a third metal plate; the first metal plate and the second metal plate are connected through a first support column, and the second metal plate and the third metal plate are connected through a second support column; the edge of the first metal plate is provided with a plurality of first U-shaped grooves along the circumferential array, the edge of the second metal plate is provided with a plurality of second U-shaped grooves along the circumferential array, and the edge of the third metal plate is provided with a plurality of third U-shaped grooves along the circumferential array; the upper surface of third metal sheet is provided with the boss, and the outside interval in border of boss extends has a plurality of first sheetmetals and a plurality of second sheetmetals, and first sheetmetal is just right the notch of third U-shaped groove. The choke antenna provided by the invention realizes the miniaturization and high integration of the antenna, reduces the size of the antenna, reduces the production cost and facilitates the storage and transportation of the antenna.
Description
The present application claims priority from chinese patent application filed on 2017, 08/month, under the name of "a choke structure, choke antenna", by the chinese patent office, application No. 201720983177.7, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of satellite navigation antennas, in particular to a choke coil structure and a choke coil antenna.
Background
With the development of satellite navigation systems and satellite navigation antennas, the positioning accuracy of a satellite positioning antenna has become higher and higher, but factors affecting the positioning accuracy of the antenna, such as multipath interference, unstable antenna phase center, and the like, still exist and become a main cause affecting the positioning accuracy of the antenna.
The current specific methods for reducing multipath interference mainly include: selecting a suitable reception environment, employing a receiver with multipath cancellation techniques, employing an antenna with multipath mitigation effects, and the like. When the delay of the multipath signal is large, the error can be removed by using the receiver having the multipath removal technique, but when the delay is small, the error is hardly removed by the receiver, and in this case, an antenna having a multipath suppression effect, such as a choke antenna, can be used. The choke structure is used as an antenna grounding plate through a substrate structure consisting of a plurality of concentric circular grooves with certain depth, the number of the concentric circular grooves is generally three to five, the groove depth is generally about one quarter wavelength, so that the surface of the choke presents high impedance characteristics, surface waves are prevented from being formed on the surface of the choke, the gain distribution of the antenna is changed, the backward gain and the low elevation gain of the antenna are reduced, and the effect of restraining multipath effect is achieved.
The existing choke coil technology is basically divided into a plane choke coil and a 3D choke coil, the number of the choke coils is different, but the choke coils have the defects of large geometric dimension (more than 300mm in diameter), heavy weight (6-10kg), inconvenience in carrying and transportation and the like.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a choke coil structure and a choke coil antenna, which are used for solving the defects of larger size and heavy weight of a choke coil in the prior art.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a choke coil structure, including a first metal plate, a second metal plate, and a third metal plate stacked upward in sequence; the first metal plate and the second metal plate are in supporting connection through a first supporting column, and the second metal plate and the third metal plate are in supporting connection through a second supporting column; the edge of the first metal plate is provided with a plurality of first U-shaped grooves along the circumferential array, the edge of the second metal plate is provided with a plurality of second U-shaped grooves along the circumferential array, the edge of the third metal plate is provided with a plurality of third U-shaped grooves along the circumferential array, and the first U-shaped grooves, the second U-shaped grooves and the third U-shaped grooves are sequentially and longitudinally arranged; the upper surface of third metal sheet is provided with the boss, the outside interval extension in border of boss has a plurality of first sheetmetals and a plurality of second sheetmetals, first sheetmetal is just right the notch of third U-shaped groove.
On the basis of the scheme, the second metal sheet extends to the edge of the third metal plate.
On the basis of the scheme, a third metal sheet extends upwards from the upper surface of the second metal sheet, and the thickness of the third metal sheet is smaller than that of the second metal sheet.
On the basis of the scheme, the thickness of the first metal sheet is smaller than that of the second metal sheet.
On the basis of the scheme, choke coil mounting seats are arranged on the edge of the first metal plate in a downward protruding mode at intervals.
The invention also provides a choke antenna, which comprises an antenna unit and the choke structure, wherein the antenna unit is arranged on the upper surface of the boss in the choke structure.
On the basis of the scheme, the antenna unit comprises a double-layer microstrip antenna with the frequency range covering the GNSS L1 frequency band and the frequency range covering the GNSSL2 frequency band.
On the basis of the scheme, the antenna in the L1 frequency band and the antenna in the L2 frequency band are connected with an orthogonal feed network, a low-noise amplification circuit and a lightning protection circuit.
(III) advantageous effects
The choke coil antenna provided by the invention realizes the miniaturization and high integration of the choke coil antenna, greatly reduces the size of the antenna, reduces the diameter of the choke coil antenna from 300mm in the prior art to less than 200mm under the condition of not influencing the performance of the choke coil, reduces the weight from 6-10kg in the prior art to about 2kg, realizes the miniaturization and light-weight design of the choke coil antenna, greatly reduces the production cost, and facilitates the storage and transportation of the choke coil antenna.
Drawings
Fig. 1 is a schematic structural diagram of a choke coil according to an embodiment of the present invention;
fig. 2 is a side view of the choke structure of fig. 1;
in the figure, 1, a first metal plate; 101. a first U-shaped slot; 102. a mounting seat; 2. a second metal plate; 201. a second U-shaped slot; 3. a third metal plate; 301. a third U-shaped groove; 302. a first metal sheet; 303. a second metal sheet; 304. a third metal sheet; 305. a boss; 4. an antenna unit; 5. a second support column; 6. a first support column.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a choke coil according to an embodiment of the present invention; fig. 2 is a side view of the choke structure of fig. 1.
As shown in fig. 1 and 2, a choke coil structure according to an embodiment of the present invention includes a first metal plate 1, a second metal plate 2, and a third metal plate 3 stacked upward in this order. In this embodiment, the diameters of the three metal plates are similar, and the diameters of the three metal plates can be adaptively designed according to requirements. The first metal plate 1 and the second metal plate 2 are connected through a first supporting column 6 in a supporting mode, the second metal plate 2 and the third metal plate 3 are connected through a second supporting column 5 in a supporting mode, therefore, a certain space is formed between the first metal plate 1 and the second metal plate 2, and a certain space is formed between the second metal plate 2 and the third metal plate 3. The edge of the first metal sheet 1 is provided with a plurality of first U-shaped grooves 101 in a circumferential array, as shown in fig. 1, the first U-shaped grooves 101 opening outward, and the plurality of first U-shaped grooves 101 are annularly arrayed. The edge of the second metal plate 2 is provided with a plurality of second U-shaped grooves 201 along the circumferential array, the plurality of second U-shaped grooves 201 are annularly arrayed on the edge of the second metal plate 2, and the notches of the second U-shaped grooves 201 face outwards. A plurality of third U-shaped grooves 301 are arranged along the edge of the third metal plate 3 in a circumferential array, and the first U-shaped groove 101, the second U-shaped groove 201, and the third U-shaped grooves 301 are sequentially and longitudinally arranged. The upper surface of the third metal plate 3 is provided with a boss 305, the edge of the boss 305 extends outwards at intervals with a plurality of first metal sheets 302 and a plurality of second metal sheets 303, the first metal sheets 302 are opposite to the notches of the third U-shaped grooves 301, and the second metal sheets 303 are located at positions between the adjacent third U-shaped grooves 301, as shown in fig. 1.
The choke coil antenna provided by the invention realizes the miniaturization and high integration of the choke coil antenna, greatly reduces the size of the antenna, reduces the diameter of the choke coil antenna from 300mm in the prior art to less than 200mm under the condition of not influencing the performance of the choke coil, reduces the weight from 6-10kg in the prior art to about 2kg, realizes the miniaturization and light-weight design of the choke coil antenna, greatly reduces the production cost, and facilitates the storage and transportation of the choke coil antenna.
On the basis of the above scheme, the second metal sheet 303 extends to the edge of the third metal plate 3, that is, the second metal sheet 303 does not exceed the edge of the third metal plate 3, which is favorable for the manufacturing of the choke structure.
On the basis of the above scheme, the third metal sheet 304 extends upwards from the upper surface of the second metal sheet 303, and the thickness of the third metal sheet 304 is smaller than that of the second metal sheet 303, as shown in fig. 1, by adjusting the width and height of the first metal sheet 302, the second metal sheet 303 or the third metal sheet 304, excellent low elevation angle performance can be realized.
Based on the above solution, the thickness of the first metal sheet 302 is smaller than that of the second metal sheet 303, so that the second metal sheet 303 can provide sufficient support for the third metal sheet 304.
On the basis of the above solution, the choke coil mounting seat 102 is protruded downward at the edge of the first metal plate 1, and as shown in fig. 1 and fig. 2, the choke coil antenna is stably mounted by the choke coil mounting seat 102. Of course, this is only one of the mounting methods, and the mounting may be performed by providing an 5/8-inch nut in the middle of the bottom surface of the antenna, as long as the first metal plate can be fixed.
The present invention also provides a choke antenna including the antenna element 4 and further including the choke structure as described above, as shown in fig. 1, the antenna element 4 is provided on the upper surface of the boss 305 in the choke structure.
Preferably, the antenna unit 4 includes a dual-layer microstrip antenna whose frequency range covers the GNSS (Global Navigation satellite system) L1 and the GNSS L2, the L1 band antenna and the L2 band antenna both use four-point orthogonal feeding, and the radiation plane uses a design scheme that is completely symmetrical with respect to the central axis of the antenna. More preferably, the antenna in the L1 frequency band and the antenna in the L2 frequency band are connected to a quadrature feed network, a low noise amplification circuit and a lightning protection circuit. The small choke structure and the antenna element 4 together form a small choke antenna. By adjusting the height and diameter of the first support column 6 and the second support column 5, multipath signal suppression for two frequency bands of L1 and L2 can be respectively realized, and the phase center stability of the antenna is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A choke structure is characterized by comprising a first metal plate, a second metal plate and a third metal plate which are sequentially stacked upwards; the first metal plate and the second metal plate are in supporting connection through a first supporting column, and the second metal plate and the third metal plate are in supporting connection through a second supporting column; the edge of the first metal plate is provided with a plurality of first U-shaped grooves along the circumferential array, the edge of the second metal plate is provided with a plurality of second U-shaped grooves along the circumferential array, the edge of the third metal plate is provided with a plurality of third U-shaped grooves along the circumferential array, and the first U-shaped grooves, the second U-shaped grooves and the third U-shaped grooves are sequentially and longitudinally arranged; the upper surface of third metal sheet is provided with the boss, the outside interval extension in border of boss has a plurality of first sheetmetals and a plurality of second sheetmetals, first sheetmetal is just right the notch in third U-shaped groove, the upper surface of second sheetmetal still upwards extends there is the third sheetmetal.
2. A choke structure according to claim 1, characterized in that said second metal sheet extends to the edge of said third metal plate.
3. A choke structure according to claim 2, characterized in that the thickness of said third metal sheet is smaller than the thickness of said second metal sheet.
4. A choke structure according to claim 3, characterized in that the thickness of said first metal sheet is smaller than the thickness of said second metal sheet.
5. A choke construction according to any one of claims 1-4, characterized in that the first metal plate is provided with choke seats at spaced downwardly projecting edges.
6. A choke antenna comprising an antenna element, characterized by further comprising a choke structure according to any one of claims 1 to 5, said antenna element being provided on an upper surface of said boss in said choke structure.
7. A choke antenna according to claim 6, characterized in that the antenna unit comprises a double-layer microstrip antenna covering the GNSSL1 band and the GNSS L2 band in frequency range.
8. A choke antenna as claimed in claim 7, wherein a quadrature feed network, a low noise amplification circuit and a lightning protection circuit are connected to the L1 band antenna and the L2 band antenna.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017209831777 | 2017-08-08 | ||
| CN201720983177 | 2017-08-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108400443A CN108400443A (en) | 2018-08-14 |
| CN108400443B true CN108400443B (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810158841.3A Active CN108400443B (en) | 2017-08-08 | 2018-02-26 | Choke coil structure and choke coil antenna |
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| CN (1) | CN108400443B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390671B (en) * | 2018-11-06 | 2020-08-14 | 西安矩阵无线科技有限公司 | Satellite-borne high-precision navigation positioning antenna |
| CN109742506B (en) * | 2018-12-17 | 2020-08-21 | 深圳市华信天线技术有限公司 | Broadband choke antenna with polarization suppression |
| CN110137673B (en) * | 2019-04-23 | 2020-05-19 | 南京恒舟准导航科技有限公司 | Mushroom head PNT combined antenna and equipment thereof |
| CN110676562B (en) * | 2019-09-27 | 2021-11-16 | 广州吉欧电子科技有限公司 | Choking type GNSS satellite antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132698A (en) * | 1991-08-26 | 1992-07-21 | Trw Inc. | Choke-slot ground plane and antenna system |
| US6278407B1 (en) * | 1998-02-24 | 2001-08-21 | Topcon Positioning Systems, Inc. | Dual-frequency choke-ring ground planes |
| CN201163662Y (en) * | 2008-03-18 | 2008-12-10 | 成都国恒空间技术工程有限公司 | Radius restraining disc with L type groove structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203260732U (en) * | 2013-04-26 | 2013-10-30 | 湖南航天环宇通信科技有限责任公司 | GNSS antenna choke coil |
| CN103457027A (en) * | 2013-08-30 | 2013-12-18 | 深圳市华信天线技术有限公司 | Diameter restraining device and antenna system |
| CA2827422A1 (en) * | 2013-09-17 | 2015-03-17 | Bruce G. Veidt | Radiofrequency radiationg device |
| CN205666335U (en) * | 2016-06-08 | 2016-10-26 | 嘉善金昌电子有限公司 | Adopt dual -frenquency dual -depth antenna choke at FSS interface |
| CN206022586U (en) * | 2016-08-18 | 2017-03-15 | 佛山市蓝波湾金科技有限公司 | A kind of orthogonal mode coupling piece, orthomode coupler and ring-focus antenna |
| CN206619685U (en) * | 2017-04-12 | 2017-11-07 | 烟台蝙蝠电子科技有限公司 | One kind miniaturization Big Dipper high precision reference station antenna |
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2018
- 2018-02-26 CN CN201810158841.3A patent/CN108400443B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132698A (en) * | 1991-08-26 | 1992-07-21 | Trw Inc. | Choke-slot ground plane and antenna system |
| US6278407B1 (en) * | 1998-02-24 | 2001-08-21 | Topcon Positioning Systems, Inc. | Dual-frequency choke-ring ground planes |
| CN201163662Y (en) * | 2008-03-18 | 2008-12-10 | 成都国恒空间技术工程有限公司 | Radius restraining disc with L type groove structure |
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| CN108400443A (en) | 2018-08-14 |
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