CN111384599A - Yagi antenna - Google Patents
Yagi antenna Download PDFInfo
- Publication number
- CN111384599A CN111384599A CN201811611117.8A CN201811611117A CN111384599A CN 111384599 A CN111384599 A CN 111384599A CN 201811611117 A CN201811611117 A CN 201811611117A CN 111384599 A CN111384599 A CN 111384599A
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- China
- Prior art keywords
- dielectric substrate
- planar dielectric
- blocking plate
- fixing
- yagi antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000002184 metal Substances 0.000 claims abstract description 77
- 239000000758 substrate Substances 0.000 claims abstract description 76
- 230000000903 blocking effect Effects 0.000 claims abstract description 50
- 238000009434 installation Methods 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 description 13
- 230000005855 radiation Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
- H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- 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
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to the technical field of antennas and discloses a yagi antenna which comprises a planar dielectric substrate; the printed metal layer is formed on the surface of one side of the planar dielectric substrate and comprises a wave guide group, a transmitter and a reflector which are parallel to the extending direction and are sequentially arranged along the direction from the head end to the tail end of the planar dielectric substrate; the metal blocking plate is connected with the tail end of the plane type medium substrate and the extending direction of the metal blocking plate is vertical to the plane of the plane type medium substrate. When the yagi antenna is applied, the metal blocking plate is arranged at the tail end of the planar dielectric substrate, and the extending direction of the metal blocking plate is perpendicular to the extending direction of the planar dielectric substrate, so that when electrical performance interference exists behind the antenna, the yagi antenna can play a role in blocking the interference to some extent. According to the yagi antenna provided by the invention, the metal blocking plate is arranged at the tail end of the planar dielectric substrate, so that the interference of the rear electric performance can be eliminated, and the front-rear proportion of the antenna can be improved.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a yagi antenna.
Background
A general yagi antenna has a plurality of elements in the form of linear dipoles, and is composed of a transmitter for supplying a current through a power supply transmission line, a reflector and a waveguide operating with a phase difference. In general, the wave-guide is shorter than a half wavelength and has a capacitive reactance component, and the reflector has an inductive reactance component, so that the later phase distance of the electromagnetic wave applied to the transmitter is equal to the distance between the transmitter and the reflector. Thus, the conventional yagi antenna utilizes the phase difference to improve the radiation gain in a specific direction.
However, such a yagi antenna is generally affected by peripheral metal bodies, and factors such as space constraints need to be eliminated in the actual use process, and these factors affect the need to maintain stable and uniform characteristics of the antenna.
Disclosure of Invention
The invention provides a yagi antenna, which is convenient for eliminating electrical performance interference from the rear of the yagi antenna by additionally arranging a metal baffle plate at the tail part.
In order to achieve the purpose, the invention provides the following technical scheme:
a yagi antenna, comprising:
a planar dielectric substrate;
the printed metal layer is formed on the surface of one side of the planar dielectric substrate and comprises a wave guide group, a transmitter and a reflector which are parallel to each other in extension direction and are sequentially arranged along the direction from the head end to the tail end of the planar dielectric substrate;
and the metal blocking plate is connected with the tail end of the planar dielectric substrate and has an extending direction vertical to the plane of the planar dielectric substrate.
In the yagi antenna, the yagi antenna includes a planar dielectric substrate, a printed metal layer formed on a surface of one side of the planar dielectric substrate, and a metal blocking plate connected to a tail end of the planar dielectric substrate, wherein the printed metal layer includes a waveguide group, a transmitter, and a reflector, which are sequentially arranged along a direction from a head end to a tail end of the planar dielectric substrate, and the waveguide group, the transmitter, and the reflector extend in a direction parallel to the extending direction. When the yagi antenna is applied, the metal blocking plate is arranged at the tail end of the planar dielectric substrate, and the extending direction of the metal blocking plate is perpendicular to the extending direction of the planar dielectric substrate, so that when electrical performance interference exists behind the antenna, the yagi antenna can play a role in blocking the interference to some extent.
According to the yagi antenna provided by the invention, the metal blocking plate is arranged at the tail end of the planar dielectric substrate, so that the interference of the rear electric performance can be eliminated, and the front-rear proportion of the antenna can be improved.
Preferably, the planar medium substrate and the metal barrier plate are welded.
Preferably, the tail part of the planar dielectric substrate is connected to the middle part of the metal barrier plate.
Preferably, the planar medium substrate further comprises a housing, the housing is specifically used for placing an accommodating cavity of the planar medium substrate, an opening matched with the metal blocking plate in shape is formed at one end of the accommodating cavity, and the metal blocking plate can be buckled with the opening.
Preferably, the metal blocking plate is detachably connected with the housing.
Preferably, a plurality of fixing holes for mounting and fixing are formed in the metal blocking plate, positioning holes corresponding to the fixing holes in the metal blocking plate one to one are formed in the opening end of the housing, and a fixing member is inserted into each pair of the fixing hole and the mounting hole which correspond to each other.
Preferably, the fixing piece is a screw, and when the fixing piece is located at an installation station, one side of the screw cap, facing the positioning hole, of the screw abuts against one end, facing away from the fixing hole, of the positioning hole.
Preferably, the number of the fixing holes on the metal blocking plate is four, and two fixing holes form a group of fixing hole groups, and two groups of fixing hole groups are arranged in parallel.
Preferably, a fixing part for fixing the head end of the planar medium substrate is formed in the accommodating cavity.
Preferably, the fixing portion is a fixing groove for engaging with the head end of the planar dielectric substrate.
Drawings
Fig. 1 is an internal structural view of a yagi antenna according to an embodiment of the present invention;
fig. 2 is a perspective view of a yagi antenna according to an embodiment of the present invention;
FIG. 3 is a side cross-sectional view of an antenna portion structure of yagi according to an embodiment of the present invention;
FIG. 4 is a side cross-sectional view of the structure of FIG. 2;
fig. 5 is a radiation pattern azimuth diagram of the yagi antenna provided by the embodiment of the invention when the yagi antenna is not provided with the metal blocking plate.
Icon: 1-a planar dielectric substrate; 2-printing a metal layer; 3-a metal barrier plate; 31-a fixation hole; 4-a housing; 41-positioning holes; 42-fixing the groove; 5-screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a yagi antenna, including:
a planar dielectric substrate 1;
the printed metal layer 2 is formed on one side surface of the planar dielectric substrate 1, and the printed metal layer 2 comprises a wave guide group, a transmitter and a reflector which are parallel to the extending direction and are sequentially arranged along the direction from the head end to the tail end of the planar dielectric substrate 1;
and the metal barrier plate 3 is connected with the tail end of the planar dielectric substrate 1 and extends in a direction vertical to the plane of the planar dielectric substrate 1.
In the yagi antenna, the yagi antenna includes a planar dielectric substrate 1, a printed metal layer 2 formed on a surface of one side of the planar dielectric substrate 1, and a metal blocking plate 3 connected to a tail end of the planar dielectric substrate 1, wherein the printed metal layer 2 includes a waveguide group, a transmitter, and a reflector arranged in sequence along a direction from a head end to a tail end of the planar dielectric substrate 1, and the waveguide group, the transmitter, and the reflector extend in parallel. When the yagi antenna is applied, the metal blocking plate 3 is disposed at the tail end of the planar dielectric substrate 1, and the extending direction of the metal blocking plate 3 is perpendicular to the extending direction of the planar dielectric substrate 1, so that when there is electrical interference behind the antenna, the yagi antenna can play a role in blocking the interference.
The yagi antenna provided by the invention can eliminate the interference of the rear electric performance and improve the front-rear proportion of the antenna by arranging the metal baffle plate 3 at the tail end of the plane type dielectric substrate 1.
In addition, because the planar dielectric substrate 1 and the metal barrier plate 3 are connected, the planar dielectric substrate 1 and the metal barrier plate 3 form a whole, when the metal barrier plate 3 is fixedly installed, the installation position of the planar dielectric substrate 1 is determined, and the structure not only can improve the installation stability of the yagi antenna provided by the invention, but also can realize diversified angle installation of the antenna.
On the basis of the above technical solution, it should be noted that the material of the planar dielectric substrate 1 is generally an epoxy glass fabric laminated board (i.e. FR-4 substrate), and the material of the metal barrier plate 3 is metal, so that the connection manner between the planar dielectric substrate 1 and the metal barrier plate 3 can be selected by adhesion.
In addition to the above technical solution, in order to better exert the function of the metal baffle plate 3 in blocking the electrical performance interference behind the planar dielectric substrate 1, as a preferred embodiment, the following is provided: the tail part of the planar dielectric substrate 1 is connected with the middle part of the metal barrier plate 3.
On the basis of the above technical solution, referring to fig. 2, the yagi antenna provided by the present invention further includes a housing 4, where the housing 4 is specifically used for placing an accommodating cavity of the planar dielectric substrate 1, and an opening matched with the metal blocking plate 3 in shape is formed at one end of the accommodating cavity, and the metal blocking plate 3 can be fastened to the opening.
Specifically, the planar dielectric substrate 1 can be placed into the shell 4 from the opening of the accommodating cavity, and the tail end of the planar dielectric substrate 1 is connected with the metal blocking plate 3, and the shape of the metal blocking plate 3 is matched with that of the opening of the accommodating cavity, so that in the installation state, the metal blocking plate 3 can be buckled with the opening of the accommodating cavity to form an integral protective shell with the shell 4.
In the above structure, the housing 4 and the metal barrier plate 3 cooperate to form a protective casing, which can enhance the protective effect on the planar dielectric substrate 1 and the printed metal layer 2 on the surface thereof, so as to avoid the phenomenon that the planar dielectric substrate 1 or the printed metal layer 2 is directly exposed in the air and is damaged by contacting with external substances during use, thereby enhancing the service life and stability of the yagi antenna provided by the present invention.
In addition, it is noted that the housing 4 and the metal blocking plate 3 can cooperate with each other to improve the radiation gain and the front-to-back ratio of the yagi antenna provided by the present invention.
On the basis of the technical scheme, in order to facilitate the disassembly and connection operation between the metal blocking plate 3 and the shell 4, the following steps are provided: the metal blocking plate 3 is detachably connected with the shell 4.
Specifically, referring to fig. 1, fig. 2 and fig. 3, as an optional embodiment, a plurality of fixing holes 31 for mounting and fixing are formed on the metal blocking plate 3, positioning holes 41 corresponding to the fixing holes 31 on the metal blocking plate 3 one by one are formed at the opening end of the housing 4, and a fixing member is inserted into each pair of the fixing holes 31 and the mounting holes corresponding to each other.
It should be noted that, the connection relationship between the housing 4 and the metal blocking plate 3 can be controlled by the installation of the fixing member, so as to realize the dismounting operation of the housing 4 relative to the metal blocking plate 3.
On the basis of the technical scheme, the following steps can be selected: the fixing element is a screw 5, and when the fixing element is in the mounting station, the side of the nut of the screw 5 facing the positioning hole 41 abuts against the end of the positioning hole 41 facing away from the fixing hole 31, as shown in fig. 4.
On the basis of the above technical solution, in order to enhance the stability of installation, as a preferred embodiment, the following are provided: the number of the fixing holes 31 on the metal blocking plate 3 is four, and two fixing holes 31 form a group of fixing holes 31, and the two groups of fixing holes 31 are arranged in parallel.
On the basis of the technical scheme, the method preferably comprises the following steps: a fixing part for fixing the head end of the planar medium substrate 1 is formed in the accommodating cavity.
It should be noted that the fixing portion in the accommodating cavity fixes the head end of the planar dielectric substrate 1, and the metal blocking plate 3 fixes the tail end of the planar dielectric substrate 1, which are matched with each other, so as to improve the stability of the mounted planar dielectric substrate 1.
As an alternative embodiment, please refer to fig. 4, the fixing portion is a fixing groove 42 for engaging with the head end of the planar dielectric substrate 1.
Specifically, when the planar dielectric substrate 1 and the housing 4 are mounted, the head end of the planar dielectric substrate 1 is inserted into the fixing groove 42, and the tail end is connected and fixed with the tail end of the housing 4 through the metal blocking plate 3.
Now, a specific structure of the yagi antenna provided by the present invention is provided to show the antenna effect after adding the metal blocking plate 3, specifically, a specific structure of the printed metal layer 2 disposed on the planar dielectric substrate 1:
1. the wave guide group also comprises a second wave guide which is arranged between the first wave guide and the emitter and is parallel to the first wave guide, and the size of the second wave guide from the emitter is smaller than that of the second wave guide from the adjacent first wave guide along the direction from the head end to the tail end of the planar medium substrate 1;
2. the length of the second wave guide is larger than that of the first wave guide along the direction from the head end to the tail end of the vertical plane type medium substrate 1;
3. the wave guide group comprises a plurality of first wave guides which are uniformly arranged at equal intervals;
4. a step-shaped gap is formed on the emitter, and along the direction from the head end to the tail end of the planar medium substrate 1, the first end opening of the step-shaped gap is positioned on one side of the emitter facing the head end of the planar medium substrate 1, the second end opening is positioned on one side of the emitter facing the tail end of the planar medium substrate 1, and along the direction perpendicular to the direction from the head end to the tail end of the planar medium substrate 1, the second end opening is positioned in the middle of the emitter, and the first end opening is positioned on one side of the second end opening;
5. a signal line connecting terminal and a grounding terminal are respectively arranged on two sides of the second port on the emitter;
6. the yagi antenna provided by the invention has a housing 4.
Taking the above structure as an example, the following data were measured:
shown in FIG. 5: with the difference of azimuth angles (azimuth angle) and the presence or absence of a radiation pattern diagram of the maximum radiation gain of the wide-frequency-domain yagi antenna corresponding to the metal blocking plate 3, specifically, a radiation pattern diagram on a Y-Z plane in the 920MHz of the center frequency of an Ultra High Frequency (UHF) frequency domain. Please continue to refer to fig. 5, wherein: the radiation is maximum in phi of the arrangement direction of the plurality of wave guides at 90 degrees, and the radiation is minimum in phi of the reflector at 270 degrees; under the condition of 0.92GHz, when the yagi antenna provided by the invention is provided with the outer metal barrier plate 3, the rear radiation is-11.7 dB (shown as a line a in figure 5), and when the yagi antenna is not provided with the reflector, the rear radiation is-8.7 dB (shown as a line b in figure 5), and obviously, under the condition, the metal barrier plate 3 is improved by 3 dB.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A yagi antenna, comprising:
a planar dielectric substrate;
the printed metal layer is formed on the surface of one side of the planar dielectric substrate and comprises a wave guide group, a transmitter and a reflector which are parallel to each other in extension direction and are sequentially arranged along the direction from the head end to the tail end of the planar dielectric substrate;
and the metal blocking plate is connected with the tail end of the planar dielectric substrate and has an extending direction vertical to the plane of the planar dielectric substrate.
2. The yagi antenna of claim 1, wherein the planar dielectric substrate is bonded to the metal blocking plate.
3. The yagi antenna of claim 2, wherein the planar dielectric substrate tail portion is connected to a middle portion of the metal blocking plate.
4. The yagi antenna of claim 1, further comprising a housing, wherein the housing is specifically configured to be a receiving cavity for placing the planar dielectric substrate, and an opening matching with the metal blocking plate in shape is formed at one end of the receiving cavity, and the metal blocking plate can be fastened to the opening.
5. The yagi antenna of claim 4, wherein the metal blocking plate is removably connected to the housing.
6. The yagi antenna as claimed in claim 5, wherein the metal blocking plate has a plurality of fixing holes for mounting and fixing, the opening end of the housing has positioning holes corresponding to the fixing holes of the metal blocking plate, and each pair of fixing holes and mounting holes corresponding to each other has a fixing member passing through.
7. The yagi antenna of claim 6, wherein the fixing element is a screw, and when the fixing element is in an installation position, a side of the nut of the screw facing the positioning hole abuts against an end of the positioning hole facing away from the fixing hole.
8. The yagi antenna of claim 7, wherein the number of the fixing holes on the metal blocking plate is four, and two fixing holes form a set of fixing hole groups, and two sets of fixing hole groups are arranged in parallel.
9. Yagi antenna according to any of claims 4-8, wherein a fixing portion for fixing the head end of the planar dielectric substrate is formed in the receiving cavity.
10. The yagi antenna as claimed in claim 9, wherein the fixing portion is a fixing groove for engaging with the head end of the planar dielectric substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811611117.8A CN111384599A (en) | 2018-12-27 | 2018-12-27 | Yagi antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811611117.8A CN111384599A (en) | 2018-12-27 | 2018-12-27 | Yagi antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111384599A true CN111384599A (en) | 2020-07-07 |
Family
ID=71220799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811611117.8A Pending CN111384599A (en) | 2018-12-27 | 2018-12-27 | Yagi antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111384599A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326922B1 (en) * | 2000-06-29 | 2001-12-04 | Worldspace Corporation | Yagi antenna coupled with a low noise amplifier on the same printed circuit board |
| JP2005142925A (en) * | 2003-11-07 | 2005-06-02 | Yagi Antenna Co Ltd | Antenna device |
| CN102044756A (en) * | 2009-10-26 | 2011-05-04 | 雷凌科技股份有限公司 | Dual Band Printed Yagi Antenna |
| KR20140102974A (en) * | 2013-02-15 | 2014-08-25 | 동서대학교산학협력단 | A broadband plannar Quasi-Yagi antenna |
| CN204741080U (en) * | 2015-05-27 | 2015-11-04 | 深圳光启智能光子技术有限公司 | Antenna device |
| CN106299641A (en) * | 2016-08-08 | 2017-01-04 | 哈尔滨工业大学 | Wide-band high gain yagi aerial |
| CN108232467A (en) * | 2017-12-20 | 2018-06-29 | 深圳市航天华拓科技有限公司 | Micro-strip Quasi-Yagi antenna |
-
2018
- 2018-12-27 CN CN201811611117.8A patent/CN111384599A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326922B1 (en) * | 2000-06-29 | 2001-12-04 | Worldspace Corporation | Yagi antenna coupled with a low noise amplifier on the same printed circuit board |
| JP2005142925A (en) * | 2003-11-07 | 2005-06-02 | Yagi Antenna Co Ltd | Antenna device |
| CN102044756A (en) * | 2009-10-26 | 2011-05-04 | 雷凌科技股份有限公司 | Dual Band Printed Yagi Antenna |
| KR20140102974A (en) * | 2013-02-15 | 2014-08-25 | 동서대학교산학협력단 | A broadband plannar Quasi-Yagi antenna |
| CN204741080U (en) * | 2015-05-27 | 2015-11-04 | 深圳光启智能光子技术有限公司 | Antenna device |
| CN106299641A (en) * | 2016-08-08 | 2017-01-04 | 哈尔滨工业大学 | Wide-band high gain yagi aerial |
| CN108232467A (en) * | 2017-12-20 | 2018-06-29 | 深圳市航天华拓科技有限公司 | Micro-strip Quasi-Yagi antenna |
Non-Patent Citations (2)
| Title |
|---|
| 俱新德: "9.6高阻抗十二元八木天线", 《实用天线工程技术》 * |
| 李文军: "9.1.3组装的连接方式", 《电工基本技能应用与实践》 * |
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Application publication date: 20200707 |
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