CN2149022Y - Yagi aerial - Google Patents
Yagi aerial Download PDFInfo
- Publication number
- CN2149022Y CN2149022Y CN 92206889 CN92206889U CN2149022Y CN 2149022 Y CN2149022 Y CN 2149022Y CN 92206889 CN92206889 CN 92206889 CN 92206889 U CN92206889 U CN 92206889U CN 2149022 Y CN2149022 Y CN 2149022Y
- Authority
- CN
- China
- Prior art keywords
- antenna
- section
- support rod
- supporting rod
- metallic support
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to the antenna class, particularly a yagi antenna used in the mobile communication; the antenna is composed of a passive vibrator, an active vibrator, a crossbeam for fixing the vibrators, an antenna supporting rod, a coaxial cable, etc. The utility model is characterized in that the metal supporting rod, the antenna radiating body, and a feeding network are combined together; namely, the metal supporting rod is used as the antenna active vibrator, and the coaxial cable is fixed to the supporting rod. Therefore, the electrical property influence of the metal supporting rod and the cable for the antenna can be eliminated; the utility model has the advantages of low cost, lightning protection, convenient installation, the change over of the directional and omnidirectional dual-purpose, etc.
Description
The utility model relates to the antenna class, particularly a kind of perpendicular polarization Yagi antenna as tracking exchage.
At present, domestic no matter be in VHF(very high frequency(VHF)) frequency range, still in the mobile communication of uhf band (superfrequency), extensively adopt Yagi antenna as the perpendicular polarization directional antenna.When installing and fixing this antenna, in order to reach balance mechanically, often the Metallic rod of fixed support antenna is passed through between the active dipole of Yagi antenna and parasitic element.Because metallic support rod is parallel with oscillator, not only makes metallic support rod and coaxial cable that the electrical property of antenna is impacted, and gives and install and set up and brought inconvenience.As in 5 yuan of vertical Yagi antennas of VHF or uhf band, support bar if between active dipole and director by the time can make about the gain decline 2dB of antenna.
The purpose of this utility model is to avoid the deficiencies in the prior art, provides a kind of metallic support rod and cable that antenna electric performance is not had influence, and perpendicular polarization Yagi antenna easy for installation.
Realize that the technical solution of the utility model is that the structure of the active dipole of common Yagi antenna with J type omnidirectional antenna replaced, the active dipole that is about to metallic support rod and antenna is combined.Its concrete structure is that metallic support rod is divided into three sections, and first section as antenna radiator, second section with parallel metal pipe, short circuit metal sheet and coaxial cable as feeding network of array antennas and isolator, the 3rd section support bar as antenna.First section middle part is fixed on the crossbeam, constitutes the perpendicular polarization Yagi antenna with parasitic element.
Followingly describe structure of the present utility model in detail with reference to accompanying drawing.
Fig. 1 is the first example structure figure of the present utility model.
Fig. 2 is the second example structure figure of the present utility model.
Among Fig. 1, (1) is the director of Yagi antenna, and (2) are reverser, respectively they is fixed on the two ends of crossbeam (9), as the parasitic element of Yagi antenna.This crossbeam is that nonmetallic materials are made.The active dipole of Yagi antenna and feed thereof are made up of with metal tube (4) and the short-circuit piece (5) fixing and short circuit this metallic support rod and parallel metal pipe parallel with this metallic support rod metallic support rod (3).Wherein metallic support rod (3) is divided into three sections as different purposes, and epimere (3A) is as the radiant section of antenna, and (3A) section middle part is fixed between the parasitic element of crossbeam, as the active dipole of Yagi antenna; Stage casing (3B) metal tube (4), short circuit sheet (5) and coaxial cable (6) in parallel formed the feeding network and the isolator of Yagi antenna, the main effect of this parallel metal pipe is a balanced feeding, impedance matching, its upper and lower side uses (3B) section of insulating material and metal material and metallic support rod fixing respectively, to guarantee both short circuits of lower end, both open circuits of upper end; (3D) section of metallic support rod is as the support usefulness of antenna, and the direct ground connection of realization antenna, avoids thunder and lightning to disturb.Coaxial cable (6) by short-circuit piece (5) enter metallic support rod (3B) section and parallel metal pipe (4) between, its inner wire is connected to the A point of (3B) section, crust is connected to the B point of parallel metal pipe (4), the position that mobile A, B are 2 reaches the purpose of adjusting the aerial voltage standing-wave ratio.In case after the fixed-site that A, B are ordered, coaxial cable also can penetrate parallel metal pipe (4), and in its B that has mixed up some position, bore a duck eye, the crust of coaxial cable just is connected on this B point, the inner wire of coaxial feeder then can pass from the hole that B is ordered, and is connected on the A point of metallic support rod (3B) section then.
Shown in Figure 2 is a polynary Yagi antenna, and its middle cross beam (9) is a metal tube, and director is by (1), (10), (11), and reverser is the polynary parasitic element that is made of (12), (13), (14).Reverser (12), (14) and (13) are triangular in shape is separately fixed on metal beam (9) and the metal beam (15).Active dipole is identical with the active dipole structure of Fig. 1, because the crossbeam of this embodiment 2 is a metal tube, therefore, for active dipole and metal beam are insulated on electric, so want earlier active dipole to be fixed on the bakelite plate (8), then bakelite plate (8) be fixed on the metal beam (9).
Among the embodiment of the directed Yagi antenna of above-mentioned two kinds of perpendicular polarizations,, satisfy needs in particular cases as long as, promptly can be used as omnidirectional antenna and use the parasitic element of this antenna and crossbeam sampling.
The utility model is owing to adopt the active dipole of J type omnidirectional antenna as Yagi antenna, promptly the part of metallic support rod as antenna, not only eliminated the electrical property influence of metallic support rod and coaxial cable to antenna, and because the direct ground connection of its antenna, thereby have the function of lightning protection concurrently, and need special additional lightning protection pin or lightning protection device, both saved cost, made things convenient for installation again, simultaneously again can omnidirectional, the directed change use.
Claims (2)
1, a kind of perpendicular polarization Yagi antenna, the crossbeam and the metallic support rod that include parasitic element, active dipole, fix this oscillator, it is characterized in that active dipole adopts the structure of J type omnidirectional antenna, the active dipole of metallic support rod and antenna is combined, promptly metallic support rod (3) is divided into three sections, first section 3A is as antenna radiator, second section 3B and parallel metal pipe (4), short circuit metal sheet (5) and coaxial cable (6) are as feeding network of array antennas and isolator, the 3D section is as the support bar of antenna, and the middle part of 3A section is fixed on the crossbeam.
2, antenna according to claim 1 it is characterized in that the inner wire of coaxial cable (6) and crust are connected respectively on parallel metal pipe (4) and the Module of aerial 3D, and connecting point position can be according to the big or small up-down adjustment of voltage standing wave ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206889 CN2149022Y (en) | 1992-04-13 | 1992-04-13 | Yagi aerial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206889 CN2149022Y (en) | 1992-04-13 | 1992-04-13 | Yagi aerial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2149022Y true CN2149022Y (en) | 1993-12-08 |
Family
ID=33762072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92206889 Expired - Fee Related CN2149022Y (en) | 1992-04-13 | 1992-04-13 | Yagi aerial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2149022Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556633A (en) * | 2019-07-26 | 2019-12-10 | 西安电子科技大学 | Broadband vertical polarization omnidirectional array antenna with adjustable unit number |
| CN111755796A (en) * | 2019-03-28 | 2020-10-09 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Short wave antenna device based on metal road facility and implementation method |
| CN113964481A (en) * | 2021-12-22 | 2022-01-21 | 中国人民解放军海军工程大学 | Ultrashort wave sampling antenna array and establishing method thereof |
-
1992
- 1992-04-13 CN CN 92206889 patent/CN2149022Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755796A (en) * | 2019-03-28 | 2020-10-09 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Short wave antenna device based on metal road facility and implementation method |
| CN111755796B (en) * | 2019-03-28 | 2022-02-08 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Short wave antenna device based on metal road facility and implementation method |
| CN110556633A (en) * | 2019-07-26 | 2019-12-10 | 西安电子科技大学 | Broadband vertical polarization omnidirectional array antenna with adjustable unit number |
| CN110556633B (en) * | 2019-07-26 | 2020-10-27 | 西安电子科技大学 | Broadband vertical polarization omnidirectional array antenna with adjustable unit number |
| CN113964481A (en) * | 2021-12-22 | 2022-01-21 | 中国人民解放军海军工程大学 | Ultrashort wave sampling antenna array and establishing method thereof |
| CN113964481B (en) * | 2021-12-22 | 2022-04-08 | 中国人民解放军海军工程大学 | Ultrashort wave sampling antenna array and establishing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |