CN210326113U - Miniaturized conformal antenna - Google Patents
Miniaturized conformal antenna Download PDFInfo
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- CN210326113U CN210326113U CN201921692779.2U CN201921692779U CN210326113U CN 210326113 U CN210326113 U CN 210326113U CN 201921692779 U CN201921692779 U CN 201921692779U CN 210326113 U CN210326113 U CN 210326113U
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- flexible printed
- printed board
- metal cavity
- antenna
- microstrip patch
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Abstract
本实用新型公开了一种小型化共形天线，所述金属腔体内部用于安装内部模块，所述柔性印制板与所述金属腔体的外表面共形安装，所述微带贴片天线与所述柔性印制板固定连接，并位于所述柔性印制板远离所述金属腔体的一面，多个所述微带贴片天线围合所述柔性印制板，所述馈电网络的一端分别与每个所述微带贴片天线电性连接，所述馈电网络的另一端贯穿至所述金属腔体的内部，并与内部模块电性连接，且所述馈电网络与所述柔性印制板的辐射面呈一体化共面设计。达到传感器网络节点能够有效利用空间结构，并利用所述金属腔体的屏蔽作用，减小内部模块对天线辐射性能的影响，减小整机性能受到的影响的目的。
The utility model discloses a miniaturized conformal antenna. The inside of the metal cavity is used for installing internal modules, the flexible printed board is conformally installed with the outer surface of the metal cavity, and the microstrip patch The antenna is fixedly connected to the flexible printed board, and is located on the side of the flexible printed board away from the metal cavity. The plurality of microstrip patch antennas enclose the flexible printed board, and the feeding One end of the network is electrically connected to each of the microstrip patch antennas, and the other end of the feed network penetrates into the interior of the metal cavity and is electrically connected to the internal module, and the feed network It has an integrated coplanar design with the radiation surface of the flexible printed board. The sensor network node can effectively utilize the space structure, and utilize the shielding effect of the metal cavity to reduce the influence of the internal module on the antenna radiation performance and the influence of the overall machine performance.
Description
Technical Field
The utility model relates to an antenna technology field among the radio communication especially relates to a miniaturized conformal antenna.
Background
The miniaturized conformal antenna is applied to the scattering type spectrum monitoring sensing network node. In order to meet the requirements of throwing and hiding in a battlefield environment, the sensor network nodes must be designed in a miniaturized mode, and meanwhile, the weight and the gravity center position of the sensor network nodes are also strictly limited. Miniaturization of the antenna is the key to overall node miniaturization.
According to the antenna design theory, the size of the antenna is related to the wavelength corresponding to the working frequency band, the traditional omnidirectional antenna is usually in a three-dimensional symmetrical structure, and in order to meet the requirement of scattering, an antenna housing needs to be added outside the antenna structure, so that the antenna structure is protected and wave-transmitting. Meanwhile, in order to meet the omnidirectional radiation characteristic, metal materials cannot be arranged around an antenna radiator, otherwise, distortion of an antenna radiation directional diagram and deviation of a working frequency band can be caused, and therefore, a sensor network node needs to allocate a large physical space to an antenna, so that spaces of other modules such as a channel, a digital board and a battery are extruded, and the performance of the whole machine is affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a miniaturized conformal antenna aims at solving the unable effectively utilized spatial structure of sensor network node among the prior art, and the inside module easily causes the influence to the antenna radiation performance, influences the technical problem of complete machine performance.
In order to achieve the above purpose, the utility model adopts a miniaturized conformal antenna, which comprises a metal cavity, a flexible printed board, a microstrip patch antenna and a feed network, the interior of the metal cavity is used for installing an internal module, the flexible printed board is installed in a conformal manner with the outer surface of the metal cavity, the microstrip patch antenna is fixedly connected with the flexible printed board, and is positioned on one surface of the flexible printed board far away from the metal cavity, a plurality of microstrip patch antennas surround the flexible printed board, one end of the feed network is electrically connected with each microstrip patch antenna, the other end of the feed network penetrates into the metal cavity, and the feed network is electrically connected with the internal module, and the feed network and the radiation surface of the flexible printed board are in an integrated coplanar design.
The metal cavity is arranged in a cylindrical structure, the flexible printed board and the outer surface of the metal cavity are installed in a conformal mode, the microstrip patch antennas are circumferentially enclosed on the outer surface wall of the flexible printed board and combined to form omnidirectional radiation, and the number of the microstrip patch antennas enclosed on the outer surface wall of the flexible printed board is even.
The microstrip patch antenna comprises a dielectric substrate, wherein the dielectric substrate is fixedly connected with the flexible printed board and is positioned on one surface of the flexible printed board, which is far away from the outer surface wall of the metal cavity, and a conformal antenna array is formed.
The microstrip patch antenna further comprises a conductor patch and a ground plate, wherein the conductor patch and the radiation surface of the flexible printed board are in an integrated coplanar design and are attached to the dielectric substrate, the conductor patch is electrically connected with the feed network, and the ground plate is fixedly connected with the dielectric substrate and is positioned at one end of the dielectric substrate far away from the flexible printed board.
The middle part of the conductor patch is provided with a plurality of short circuit through holes, and the short circuit through holes are arranged in a horizontal row.
The outer surface wall of the metal cavity is provided with a plurality of accommodating grooves, each accommodating groove is located at a position right below the corresponding conductor patch, a dielectric gasket is filled in each accommodating groove, and the outer surface wall of each dielectric gasket is flush with the outer surface wall of the metal cavity.
Wherein, every dielectric spacer is the arc structure setting.
Wherein, the medium gasket is made of polytetrafluoroethylene materials.
Wherein the thickness of each medium gasket is 1 mm-3 mm.
Wherein the thickness of the flexible printed board is 0.5 mm-0.6 mm.
The utility model discloses a miniaturized conformal antenna, through the inside module that is used for installing of metal cavity, flexible printing board with the conformal installation of metal cavity's surface, microstrip patch antenna with flexible printing board fixed connection, and be located flexible printing board is kept away from the one side of metal cavity, the quantity of microstrip patch antenna is a plurality of, and is a plurality of microstrip patch antenna encloses to close flexible printing board, the one end of feed network with microstrip patch antenna electric connection, the other end of feed network runs through the lateral wall of metal cavity, and with the inside module electric connection of metal cavity. The microstrip patch antennas are surrounded on the outer wall of the metal cavity through the flexible printed board, the inner space of the metal cavity is given to the internal module, the structural space is fully utilized, the shielding effect of the metal cavity is utilized, the influence of the internal module on the radiation performance of the antenna is reduced, and the performance of the whole antenna is prevented from being influenced. Therefore, the sensor network node can effectively utilize the space structure, and the influence of the internal module on the radiation performance of the antenna and the influence on the performance of the whole machine are reduced by utilizing the shielding effect of the metal cavity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a miniaturized conformal antenna according to the present invention.
Fig. 2 is a cross-sectional view of the structure of the miniaturized conformal antenna of the present invention.
Fig. 3 is a schematic structural diagram of the microstrip patch antenna of the present invention.
Fig. 4 is a side view of a miniaturized conformal antenna of the present invention.
Fig. 5 is a graph of the standing wave of a miniaturized conformal antenna without the addition of a dielectric spacer.
Fig. 6 is a graph of the standing wave of a miniaturized conformal antenna when a dielectric spacer is added.
Fig. 7 is the E-plane radiation pattern of the miniaturized conformal antenna of the present invention.
Fig. 8 is the H-plane radiation pattern of the miniaturized conformal antenna of the present invention.
100-miniaturized conformal antenna, 10-metal cavity, 11-accommodating groove, 12-dielectric gasket, 20-flexible printed board, 30-microstrip patch antenna, 31-dielectric substrate, 32-conductor patch, 33-short via hole, 34-ground board, 40-feed network and 41-microstrip line.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 8, the present invention provides a miniaturized conformal antenna 100, which includes a metal cavity 10, a flexible printed board 20, a microstrip patch antenna 30 and a feeding network 40, the interior of the metal cavity 10 is used for installing an internal module, the flexible printed board 20 is installed in a conformal manner with the outer surface of the metal cavity 10, the microstrip patch antenna 30 is fixedly connected with the flexible printed board 20, and is located on one side of the flexible printed board 20 far from the metal cavity 10, the number of the microstrip patch antennas 30 is multiple, the plurality of microstrip patch antennas 30 enclose the flexible printed board 20, one end of the feed network 40 is electrically connected to each of the microstrip patch antennas 30, the other end of the feed network 40 penetrates into the metal cavity 10, and is electrically connected with the internal module, and the feed network 40 and the radiation surface of the flexible printed board 20 are in an integrated coplanar design.
In this embodiment, the cavity structure inside the metal cavity 10 is formed by machining, the flexible printed board 20 is processed by a conventional process and has a characteristic of good consistency, the flexible printed board 20 is conformally mounted on the surface of the metal cavity 10 by means of glue or screw mounting, the flexible printed board 20 forms a natural radiation surface, a plurality of microstrip patch antennas 30 are enclosed on the outer surface wall of the flexible printed board 20, one end of the feed network 40 is electrically connected to each microstrip patch antenna 30, the other end of the feed network 40 penetrates through the side wall of the metal cavity 10 and is electrically connected to an internal module inside the metal cavity 10, when a plurality of microstrip patch antennas 30 are arrayed, the feed network 40 can be integrated with the radiation surface of the flexible printed board 20 in a coplanar design by means of microstrip line 41 or coaxial line transmission line, among them, the microstrip line 41 is preferably a transmission line. The feed position in the feed network 40 is welded with the microstrip line 41 through a flexible cable with a miniature radio frequency connector, and then penetrates through the opening on the outer wall of the metal cavity 10 to penetrate into the interior to be connected with the corresponding data transmission module inside, so that the module can realize the normal radio frequency signal receiving and transmitting function through an antenna.
Through the integrated coplanar design of the feed network 40 and the flexible printed board 20, additional connecting devices can be reduced, and the flexible printed board is convenient to install and easy to conform. Through the conformal installation of the flexible printed board 20 and the outer surface of the metal cavity 10, the internal space of the metal cavity 10 is given to the internal module, so that the structural space is fully utilized, the influence of the internal module on the radiation performance of the antenna is reduced by utilizing the shielding effect of metal, and the performance of the whole antenna is prevented from being influenced.
Further, the metal cavity 10 is arranged in a cylindrical structure, the flexible printed board 20 is installed in a conformal manner with the outer surface of the metal cavity 10, the plurality of microstrip patch antennas 30 are circumferentially enclosed on the outer surface wall of the flexible printed board 20, and are combined to form omnidirectional radiation, and the number of the microstrip patch antennas 30 enclosed on the outer surface wall of the flexible printed board 20 is even.
In this embodiment, the metal cavity 10 is arranged in a cylindrical structure, and the plurality of microstrip patch antennas 30 are circumferentially enclosed on the outer surface wall of the flexible printed board 20, and are combined to form omnidirectional radiation. The plurality of microstrip patch antennas 30 are circumferentially enclosed on the outer surface wall of the flexible printed board 20, so that a plurality of independent directional beams are combined to form an omnidirectional beam, the device has omnidirectional covering capability of each azimuth plane, the using requirement of the omnidirectional antenna required by a sensor network node is met, conditions are created for conformal design, and the number of the microstrip patch antennas 30 enclosed on the outer surface wall of the flexible printed board 20 is set to be even, so that the omnidirectional covering capability of each azimuth plane of the device can be further improved, and the using requirement of the omnidirectional antenna required by the sensor network node is met.
Further, the microstrip patch antenna 30 includes a dielectric substrate 31, where the dielectric substrate 31 is fixedly connected to the flexible printed board 20 and is located on a side of the flexible printed board 20 away from the outer surface wall of the metal cavity 10, and forms a conformal antenna array.
In this embodiment, the thickness of the dielectric substrate 31 is not greater than 0.5mm, the dielectric substrate 31 has good flexibility, and after the flexible printed board 20 is processed, the dielectric substrate 31 is bent and mounted on the outer surface wall of the flexible printed board 20 to form a conformal structure, that is, a conformal antenna array.
Further, the microstrip patch antenna 30 further includes a conductor patch 32 and a ground plate 34, the conductor patch 32 and the radiation surface of the flexible printed board 20 are integrally coplanar and attached to the dielectric substrate 31, the conductor patch 32 is electrically connected to the feeding network 40, and the ground plate 34 is fixedly connected to the dielectric substrate 31 and located at one end of the dielectric substrate 31 far away from the flexible printed board 20. The middle part of conductor paster 32 is provided with a plurality of short circuit via holes 33, and is a plurality of short circuit via holes 33 are horizontal row form setting.
In this embodiment, the length of the conductor patch 32 is about 1/2 of the wavelength of the medium corresponding to the operating frequency according to the antenna design theory. The working frequency of the data transmission antenna is 1900MHz, if the dielectric substrate 31 with the dielectric constant of 2.55 is adopted, the length of the corresponding conductor patch 32 is about 54mm, and the size caused by the feed network 40 is increased, the height size of the antenna still exceeds the target requirement, so a miniaturization design means needs to be adopted for the microstrip patch antenna 30. By arranging the row of short-circuit through holes 33 in the middle of the conductor patch 32, the size of the conductor patch 32 can be reduced to a half of the original size, namely, a quarter of the wavelength of a medium corresponding to the working frequency, and at the moment, the overall height size of the conductor patch 32 and the feed network 40 can be controlled within 40mm, so that the design of miniaturization of the microstrip patch antenna 30 is achieved.
Further, the outer wall of the metal cavity 10 is provided with a plurality of accommodating grooves 11, each accommodating groove 11 is located at a position right below each corresponding conductor patch 32, a dielectric gasket 12 is filled in each accommodating groove 11, and the outer wall of each dielectric gasket 12 is flush with the outer wall of the metal cavity 10.
In this embodiment, the metal cavity 10 is grooved by machining to form the accommodating groove 11, the dielectric gasket 12 is embedded in the accommodating groove 11, and after the dielectric gasket 12 is embedded in the accommodating groove 11, the outer surface of the dielectric gasket 12 is flush with the outer surface of the metal cavity 10, and then the flexible printed board 20 with the microstrip patch antenna 30 is mounted on the outer surface of the accommodating groove 11. At this time, each of the microstrip patch antennas 30 is formed by combining the conductor patch 32 attached to the outer surface of the flexible printed board 20, the dielectric spacer 12 embedded in the accommodating groove 11, and the metal cavity 10 serving as a ground plane, so that the dielectric thickness of the microstrip patch antenna 30 is increased equivalently, and the working bandwidth is widened. Because the conductor patch 32 adopts a miniaturization means of increasing a row of the short-circuit through holes 33 and adopts a thinner flexible printed board 20, the standing wave bandwidth of the microstrip patch antenna 30 becomes narrow, and the requirement of the working frequency band of the data transmission antenna cannot be met, therefore, the working bandwidth of the microstrip patch antenna 30 is widened by increasing the dielectric gasket 12 on the inner surface wall of the flexible printed board, and the problem of the narrowing of the antenna bandwidth caused by miniaturization and conformal installation is solved.
Further, each of the dielectric spacers 12 is disposed in a circular arc structure.
In this embodiment, the shape of the dielectric gasket 12 embedded in the accommodating groove 11 is an arc-shaped structure, so that the dielectric gasket 12 is embedded more conveniently and quickly, and the outer surface of the dielectric gasket 12 is more flush with the outer surface of the metal cavity 10.
Further, the dielectric gasket 12 is made of polytetrafluoroethylene material. The thickness of each dielectric gasket 12 is 1 mm-3 mm.
In the present embodiment, the dielectric spacer 12 is preferably made of polytetrafluoroethylene, and the thickness of the made dielectric spacer 12 is 2mm, and the dielectric spacer 12 can be directly formed by machining.
Further, the thickness of the flexible printed board 20 is 0.5mm to 0.6 mm.
In the present embodiment, in order to enable the microstrip patch antenna 30 to be conformally applied to the surface of the cylindrical metal cavity 10, and the thickness of the selected flexible printed board 20 cannot be too thick, and the hardness cannot be too high, therefore, the plate AD255A is selected, and the thickness is 0.508mm, so as to meet the requirement of bending conformal installation.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A miniaturized conformal antenna is characterized in that,
the metal cavity is internally used for installing an internal module, the flexible printed board is installed in a conformal mode with the outer surface of the metal cavity, the microstrip patch antennas are fixedly connected with the flexible printed board and located on one side, away from the metal cavity, of the flexible printed board, the number of the microstrip patch antennas is multiple, the microstrip patch antennas surround the flexible printed board, one end of the feed network is electrically connected with each microstrip patch antenna, the other end of the feed network penetrates through the metal cavity and is electrically connected with the internal module, and the feed network and the radiation surface of the flexible printed board are in an integrated coplanar design.
2. The miniaturized conformal antenna of claim 1,
the metal cavity is arranged in a cylindrical structure, the flexible printed board and the outer surface of the metal cavity are installed in a conformal mode, the microstrip patch antennas are circumferentially arranged on the outer surface wall of the flexible printed board in a surrounding mode and combined to form omnidirectional radiation, and the number of the microstrip patch antennas arranged on the outer surface wall of the flexible printed board in the surrounding mode is even.
3. The miniaturized conformal antenna of claim 1,
the microstrip patch antenna comprises a dielectric substrate, wherein the dielectric substrate is fixedly connected with the flexible printed board and is positioned on one surface of the flexible printed board, which is far away from the outer surface wall of the metal cavity, and a conformal antenna array is formed.
4. The miniaturized conformal antenna of claim 3,
the microstrip patch antenna further comprises a conductor patch and a ground plate, wherein the conductor patch and the radiation surface of the flexible printed board are in an integrated coplanar design and are attached to the dielectric substrate, the conductor patch is electrically connected with the feed network, and the ground plate is fixedly connected with the dielectric substrate and is positioned at one end of the dielectric substrate far away from the flexible printed board.
5. The miniaturized conformal antenna of claim 4,
the middle part of conductor paster is provided with a plurality of short circuit via holes, and is a plurality of the short circuit via hole is horizontal row form setting.
6. The miniaturized conformal antenna of claim 5,
the utility model discloses a conductor paster, including metal cavity, conductor paster, metal cavity's outward appearance wall is provided with a plurality of holding tanks, and every holding tank is located every that corresponds position under the conductor paster, every the inside packing of holding tank has the dielectric gasket, and every the outward appearance wall of dielectric gasket all with metal cavity's outward appearance wall flushes.
7. The miniaturized conformal antenna of claim 6,
each medium gasket is arranged in a circular arc structure.
8. The miniaturized conformal antenna of claim 7,
the medium gasket is made of polytetrafluoroethylene materials.
9. The miniaturized conformal antenna of claim 8,
the thickness of each medium gasket is 1 mm-3 mm.
10. The miniaturized conformal antenna of any one of claims 1 to 9,
the thickness of the flexible printed board is 0.5 mm-0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921692779.2U CN210326113U (en) | 2019-10-11 | 2019-10-11 | Miniaturized conformal antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921692779.2U CN210326113U (en) | 2019-10-11 | 2019-10-11 | Miniaturized conformal antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210326113U true CN210326113U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921692779.2U Expired - Fee Related CN210326113U (en) | 2019-10-11 | 2019-10-11 | Miniaturized conformal antenna |
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| Country | Link |
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| CN (1) | CN210326113U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611152A (en) * | 2019-10-11 | 2019-12-24 | 中国人民解放军第六九O五工厂 | Miniaturized Conformal Antennas |
| CN112310631A (en) * | 2020-11-06 | 2021-02-02 | 南京理工大学 | Miniaturized microstrip antenna based on PCB |
| CN114799516A (en) * | 2022-04-15 | 2022-07-29 | 南京航空航天大学 | Intelligent assembling and welding system for three-dimensional circuit and working method of intelligent assembling and welding system |
-
2019
- 2019-10-11 CN CN201921692779.2U patent/CN210326113U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611152A (en) * | 2019-10-11 | 2019-12-24 | 中国人民解放军第六九O五工厂 | Miniaturized Conformal Antennas |
| CN110611152B (en) * | 2019-10-11 | 2025-03-25 | 中国人民解放军第六九O五工厂 | Miniaturized conformal antenna |
| CN112310631A (en) * | 2020-11-06 | 2021-02-02 | 南京理工大学 | Miniaturized microstrip antenna based on PCB |
| CN114799516A (en) * | 2022-04-15 | 2022-07-29 | 南京航空航天大学 | Intelligent assembling and welding system for three-dimensional circuit and working method of intelligent assembling and welding system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 |