CN110444861B - Three-frequency miniaturized pure metal Pifa antenna containing V2X frequency band - Google Patents
Three-frequency miniaturized pure metal Pifa antenna containing V2X frequency band Download PDFInfo
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- CN110444861B CN110444861B CN201910724776.0A CN201910724776A CN110444861B CN 110444861 B CN110444861 B CN 110444861B CN 201910724776 A CN201910724776 A CN 201910724776A CN 110444861 B CN110444861 B CN 110444861B
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- 239000002184 metal Substances 0.000 title claims abstract description 18
- 230000005855 radiation Effects 0.000 claims abstract description 68
- 238000005452 bending Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3216—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used where the road or rail vehicle is only used as transportation means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The invention relates to a three-frequency miniaturized pure metal Pifa antenna with a V2X frequency band, which comprises an antenna whole body, wherein the antenna whole body is in a hollowed cuboid shape, the antenna whole body comprises a feed port, a grounding arm, an L-shaped curved and straight surface high-frequency radiation arm, a curved surface impedance matching arm, a radiation arm, a medium-frequency radiation arm, a low-frequency radiation arm, a curved and straight surface short-circuit arm and a curved and straight surface adjusting arm, the sizes of the three low, medium and high-frequency radiation arms can be adjusted according to required frequency, the curved and straight surface impedance matching arm, the curved and straight surface adjusting arm and the curved and straight surface short-circuit arm are adjusted to optimize the impedance and the bandwidth of the antenna, the antenna whole body is manufactured by adopting a pure metal three-dimensional bending process, each part of the antenna is cut out on a metal plate with a certain thickness, and the parts of the antenna are bent downwards according.
Description
Technical Field
The invention relates to the technical field of antennas for wireless communication, in particular to a three-frequency miniaturized pure metal Pifa antenna with a V2X frequency band.
Background
With the development of communication technology, some advanced technologies are invented, wherein the V2X technology related to daily traffic safety of people is one of the advanced technologies. V2X is the information exchange between vehicles and the outside, and is a generic term of a series of vehicle-mounted communication technologies. V2X includes six major categories, automobile-to-automobile (V2V), automobile-to-roadside equipment (V2R), automobile-to-infrastructure (V2I), automobile-to-pedestrian (V2P), automobile-to-locomotive (V2M), and automobile-to-bus (V2T). The national industry and communications department programs the V2X frequency band into 5905-5925MHz, and the frequency band is immediately followed by the 5GHz frequency band of WIFI.
In order to ensure that the antenna has good gain, bandwidth and multi-frequency coverage, the common Pifa antenna has the problems of complex structure, unstable installation mode and the like, and is not beneficial to the practical application of the designed antenna.
Disclosure of Invention
The invention aims to solve the problems of higher miniaturization requirement and multi-band coverage in the design of a communication antenna, and provides a pure metal Pifa antenna with excellent three-band miniaturization radiation performance and a V2X frequency band from the practical application of products aiming at the defects of the prior art, wherein the antenna has the characteristic of three-band broadband and can be simply and stably arranged on a PCB circuit board or other metal carriers in a product shell with the requirement of V2X.
In order to achieve the purpose, the invention discloses a three-frequency miniaturized pure metal Pifa antenna with a V2X frequency band, which comprises an antenna whole body, wherein the antenna whole body is in a hollowed cuboid shape, and the antenna whole body comprises a feed port, a grounding arm, an L-shaped curved straight surface high-frequency radiation arm, a curved surface impedance matching arm, a radiation arm, an intermediate frequency radiation arm, a low frequency radiation arm, a curved straight surface short circuit arm and a curved straight surface adjusting arm.
The antenna comprises a feed port, a feed pad, a ground arm, an L-shaped curved straight-surface high-frequency radiation arm, a curved impedance matching arm, a low-frequency radiation arm and an intermediate-frequency radiation arm, wherein the feed port can be welded on the feed pad of an antenna PCB circuit board where the feed port is located, the feed pad matched with the PCB circuit board is reserved, the ground arm can be welded on the floor of the antenna PCB circuit board where the ground arm is located, the L-shaped curved straight-surface high-frequency radiation arm is connected with the feed port and perpendicular to the ground arm, one end of the curved impedance matching arm is connected with the L-shaped curved straight-surface high-frequency radiation arm, the other end of the curved impedance matching arm is connected with the radiation arm, the two ends of the radiation arm are respectively connected with the low-frequency radiation arm and the intermediate-frequency radiation arm, the low-frequency radiation arm is connected with the curved straight-surface adjustment arm, the curved straight-surface adjustment arm is perpendicular.
In a further scheme, the feed port, the grounding arm, the L-shaped curved and straight surface high-frequency radiation arm, the curved surface impedance matching arm, the radiation arm, the intermediate-frequency radiation arm, the low-frequency radiation arm, the curved and straight surface short circuit arm and the curved and straight surface adjusting arm are all rectangular plate-shaped. The structure is characterized in that the grounding arm, namely the rectangular ground part at the whole bottom of the antenna, is designed into a surface-to-surface connection mounting mode in order to facilitate the stable mounting of the antenna on a planar PCB, and the shape of the grounding arm can be changed according to the shape of a carrier, or the grounding arm is removed, and a feed arm and a short-circuit arm are directly changed into an embedded type.
The further scheme is that the whole of the feed port and the curved surface impedance matching arm is a curved surface.
In a further aspect, each curved-straight surface intersection portion in the overall antenna structure includes a plurality of structural grooves. The structure is characterized in that the structural groove is convenient for bending most of surfaces and surfaces of the antenna, and simultaneously eliminates the condition of surface deformation caused by the bent surfaces so as to ensure the stability and convenient feasibility of the curved-straight-surface structure.
The further scheme is that the width of the notch of the structural groove is 0.2-0.4 mm.
The Pifa antenna of the present invention can calculate the size of the radiating arm corresponding to the intermediate frequency according to the frequency calculation formula (1.1 formula-1.5 formula) of a typical Pifa antenna (as shown in fig. 1), which is as follows:
when W is equal to L1When the temperature of the water is higher than the set temperature,
when W is equal to 0, the compound,
when L is1≤L2When f is presentr＝rf1+(1-r)f2(1.4 formula);
when L is1>L2When f is presentr＝rkf1+(1-rk)f2(1.5 formula);
wherein: l is1、L2Length and width of the radiation unit, H height of the short-circuit metal sheet, W width of the short-circuit metal sheet, and C speed of light in vacuum of 3 × 108m/s，
The invention has the beneficial effects that: the whole antenna is manufactured by adopting a pure metal three-dimensional bending process, and the antenna is directly molded, so that the processing and assembling cost of the antenna is reduced, and the consistency of the antenna is ensured; each part of the antenna is cut on a metal plate with a certain thickness, and the antenna parts are bent downwards according to the design, so that the volume of the antenna is effectively reduced; the feed part and the short circuit grounding part are designed to be of a surface structure, so that the influence caused by other structures, environments and other factors under the actual application condition can be effectively reduced, and the impedance of the antenna is effectively ensured; the feed part adopts a small-profile structure, so that feed welding is stable; the grounding part is designed to be directly welded on a PCB or other surface structures of metal carriers, so that the stability of the antenna is stronger, and the influence of vibration on the antenna such as deformation and the like is greatly reduced; the antenna comprises a V2X frequency band, and multiple parts of the antenna are bent by depending on a lambda/4 wavelength structure of the Pifa antenna, so that the volume of the antenna is reduced to the maximum extent, and the Pifa antenna has excellent radiation performance; meanwhile, the tinplate material is adopted, and the antenna has the advantage of low cost on the premise of ensuring the stable structure and excellent performance of the antenna, so that the antenna has a good prospect on mobile terminals and equipment.
Drawings
Fig. 1 is a schematic diagram of a typical Pifa antenna.
Fig. 2 is a schematic front view of an embodiment of the present invention.
Fig. 3 is a schematic diagram of a back structure according to an embodiment of the invention.
Fig. 4 is a standing wave diagram of an antenna according to an embodiment of the present invention.
Fig. 5 is an antenna radiation pattern of an embodiment of the present invention.
Detailed Description
In order to more clearly and effectively explain the technical solution of the embodiment of the present invention, a technical solution is described with reference to the accompanying drawings and the embodiment:
as shown in fig. 2 and 3, the three-frequency miniaturized pure metal Pifa antenna with a V2X frequency band of the present invention includes an antenna whole body, the antenna whole body is in a hollow cuboid shape, and the antenna whole body includes a feed port 1, a grounding arm 2, an L-shaped curved and straight high-frequency radiation arm 3, a curved impedance matching arm 4, a radiation arm 5, an intermediate frequency radiation arm 6, a low-frequency radiation arm 7, a curved and straight short-circuit arm 8, and a curved and straight adjusting arm 9. The L-shaped curved and straight high-frequency radiating arm 3 controls high frequency in three frequencies and low frequency in the three frequencies, can transversely adjust the radiating arm, and has large increase and decrease space. The 3 radiation arms all accord with the radiation characteristics of the Pifa antenna, the length of the radiation arms is on the basis of lambda/4, and the required frequency can be obtained by finely adjusting the length of the radiation arms according to the influence of the specific application environment on the antenna. The bent straight-surface short circuit arm 8 controls the bandwidth of the antenna, the width of the short circuit arm is increased, the bandwidth of the antenna can be effectively increased, and meanwhile, the double-frequency of a high frequency band is slightly increased. The curved and straight surface adjusting arm 9 controls low-frequency impedance, the low-frequency impedance can be effectively improved by adjusting the length of the curved and straight surface adjusting arm, the influence on low-frequency is small, and high-frequency slightly deviates.
The feed port 1 can be welded on a feed pad of an antenna PCB circuit board where the feed port 1 is located, the grounding arm 2 can be welded on a floor of the antenna PCB circuit board where the ground arm is located, the L-shaped curved-straight-surface high-frequency radiation arm 3 is connected with the feed port 1 and perpendicular to the grounding arm 2, one end of the curved-surface impedance matching arm 4 is connected with the L-shaped curved-straight-surface high-frequency radiation arm 3, the other end of the curved-straight-surface impedance matching arm is connected with the radiation arm 5, the two ends of the radiation arm 5 are respectively connected with the low-frequency radiation arm 7 and the medium-frequency radiation arm 6, the low-frequency radiation arm 7 is connected with the curved-straight-surface adjusting arm 9, the curved-straight-surface adjusting arm 9 is perpendicular to the grounding arm 2, the upper end of the curved-straight-surface short-circuit arm 8 is connected with the radiation arm 5, the lower end of the curved-straight surface short circuit arm. The feed port 1, the grounding arm 2, the L-shaped curved and straight high-frequency radiation arm 3, the curved impedance matching arm 4, the radiation arm 5, the intermediate-frequency radiation arm 6, the low-frequency radiation arm 7, the curved and straight short circuit arm 8 and the curved and straight adjusting arm 9 are all rectangular plate-shaped. The feeding port 1 and the curved surface impedance matching arm 4 are integrally curved surfaces. Each curved-straight intersection portion within the overall antenna structure contains a plurality of structural slots 10. The width of the notch of the structural groove 10 is 0.2-0.4 mm. An example dimension of the L-branch portion of the feed port is 2.5mm x 1.8 mm. An example dimension of the grounding arm is 35.0mm x 6.8 mm. The overall antenna height is 7.5mm, and the metal thickness is 0.5 mm.
The application frequency band of the antenna in the embodiment is V2X + WIFI frequency band, namely 2400-2483.5 MHz and 4900-5925 MHz, and standing wave in the frequency band meets the requirement of being less than or equal to 2.0.
It should be noted that, this embodiment is only an implementation case of the present invention, that is, a case of a V2X + WIFI band, three bands of the antenna may change the antenna structure according to actual needs, and the frequency may be changed to V2X plus a desired band, that is, the size of the curved-straight surface adjusting arm 9 is changed, and the frequency multiplication or the impedance of the V2X adjacent band is optimized, so that the antenna has a V2X band, and this embodiment does not limit the application band of the antenna.
The foregoing is merely one embodiment of the invention, and is not intended to be exhaustive or to limit the invention to the precise form disclosed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Based on the embodiments of the present invention, it should be noted that all other embodiments obtained by workers skilled in the art without any inventive work are within the scope of the present invention.
Claims (2)
1. The utility model provides a three miniaturized pure metal Pifa antennas of frequency channel that contain V2X, includes the antenna wholly, its characterized in that:
the antenna is integrally hollow and rectangular, and comprises a feed port (1), a grounding arm (2), an L-shaped curved and straight high-frequency radiation arm (3), a curved impedance matching arm (4), a radiation arm (5), an intermediate-frequency radiation arm (6), a low-frequency radiation arm (7), a curved and straight short-circuit arm (8) and a curved and straight adjusting arm (9); the feed port (1) can be welded on a feed pad of the antenna PCB circuit board, the grounding arm (2) can be welded on the floor of the antenna PCB circuit board, the L-shaped curved-straight-surface high-frequency radiation arm (3) is connected with the feed port (1) and is perpendicular to the grounding arm (2), an extension part connected through a curved surface is arranged on the short side of the L-shaped curved-straight-surface high-frequency radiation arm (3), and the extension part is perpendicular to the L-shaped curved-straight-surface high-frequency radiation arm (3), the grounding arm (2) and the radiation arm (5); one end of the curved surface impedance matching arm (4) is connected with the L-shaped curved and straight surface high-frequency radiation arm (3), the other end of the curved surface impedance matching arm is connected with the radiation arm (5), the two ends of the radiation arm (5) are respectively connected with the low-frequency radiation arm (7) and the medium-frequency radiation arm (6), the low-frequency radiation arm (7) and the medium-frequency radiation arm are integrated into a whole and are all parallel to the grounding arm (2), the low-frequency radiation arm (7) is connected with the curved and straight surface adjusting arm (9), the curved and straight surface adjusting arm (9) is vertical to the grounding arm (2), the upper end of the curved and straight surface short circuit arm (8) is connected with the radiation arm (5), the lower end of the curved and straight surface short circuit arm (8) is connected with the grounding arm (2;
the feed port (1), the grounding arm (2), the L-shaped curved and straight high-frequency radiation arm (3), the curved impedance matching arm (4), the radiation arm (5), the intermediate-frequency radiation arm (6), the low-frequency radiation arm (7), the curved and straight short-circuit arm (8) and the curved and straight adjusting arm (9) are all rectangular plate-shaped;
the feeding port (1) and the curved surface impedance matching arm (4) are integrally curved surfaces;
each curved-straight surface intersection part in the whole antenna structure comprises a plurality of structural grooves (10).
2. The V2X frequency band-containing tri-band miniaturized pure metal Pifa antenna as claimed in claim 1, wherein the width of the notch of the structural groove (10) is 0.2-0.4 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910724776.0A CN110444861B (en) | 2019-08-07 | 2019-08-07 | Three-frequency miniaturized pure metal Pifa antenna containing V2X frequency band |
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| CN201910724776.0A CN110444861B (en) | 2019-08-07 | 2019-08-07 | Three-frequency miniaturized pure metal Pifa antenna containing V2X frequency band |
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| CN110444861B true CN110444861B (en) | 2021-06-22 |
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| CN113964501A (en) * | 2021-11-22 | 2022-01-21 | 江西创新科技有限公司 | Novel 5G communication antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570035A (en) * | 2010-12-23 | 2012-07-11 | 瑞昱半导体股份有限公司 | Double-frequency antenna and relevant communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6714162B1 (en) * | 2002-10-10 | 2004-03-30 | Centurion Wireless Technologies, Inc. | Narrow width dual/tri ISM band PIFA for wireless applications |
| CN103682580B (en) * | 2012-09-18 | 2017-02-08 | 富士康(昆山)电脑接插件有限公司 | Multi-band antenna |
| CN205429168U (en) * | 2015-12-17 | 2016-08-03 | 美磊科技股份有限公司 | Dual Band Antenna Module |
| TWM524568U (en) * | 2016-01-25 | 2016-06-21 | 智邦科技股份有限公司 | Inverted-F antenna structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570035A (en) * | 2010-12-23 | 2012-07-11 | 瑞昱半导体股份有限公司 | Double-frequency antenna and relevant communication device |
Non-Patent Citations (2)
| Title |
|---|
| Very-Low-Profile, Stand-Alone, Tri-Band WLAN Antenna Design for Laptop-Tablet Computer with Complete Metal-Backed Cover;Cheng-Tse Lee; Saou-Wen Su;《2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP)》;20170206;全文 * |
| 一种应用于高铁移动通信系统的高增益宽带天线设计;艾壮等;《2019年全国天线年会论文集（上册）》;20190722;全文 * |
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