CN206349517U - A kind of easy miniaturization yagi aerial - Google Patents
A kind of easy miniaturization yagi aerial Download PDFInfo
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- CN206349517U CN206349517U CN201720009766.5U CN201720009766U CN206349517U CN 206349517 U CN206349517 U CN 206349517U CN 201720009766 U CN201720009766 U CN 201720009766U CN 206349517 U CN206349517 U CN 206349517U
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- China
- Prior art keywords
- medium substrate
- differential mode
- feeder
- balun
- feed circuit
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Abstract
A kind of easy miniaturization yagi aerial, including medium substrate, are arranged at the positive feeder of the medium substrate, balance balun, differential mode feed circuit, coplanar striplines, feed oscillator and director, and be arranged at the ground strip of the medium substrate reverse side；The feeder one end connects antenna port, other end connection balance balun one end；The balance balun other end is connected with differential mode feed circuit one end, the feeder and be arranged in medium substrate one end side with balancing balun horizontal alignment；The differential mode feed circuit other end is connected with coplanar striplines one end, and the horizontally disposed opposite side in the medium substrate end of differential mode feed circuit；The feed oscillator is horizontally disposed in the middle part of the medium substrate, and the source of feed oscillator is connected with the coplanar striplines other end；The director is flatly arranged in the medium substrate other end.Will balance balun and feeder it is horizontal to reduce longitudinal length；So as to realize miniaturization so that antenna structure is more compact, moreover it is possible to ensure good electrical performance characteristic.
Description
Technical field
The utility model is related to yagi aerial field, particularly a kind of easy miniaturization yagi aerial.
Background technology
At present, yagi aerial (Yagi-Uda Antenna) is a kind of conventional aerial, and it has good directionality, compared with dipole
Antenna has high gain, is applicable to the fields such as direction finding, telecommunication.But because traditional yagi aerial is a kind of three-dimensional
Antenna, volume is huger, integrated more difficult with microwave circuit., the Itoh of University of California, Los Angeles in 1998
Yagi aerial technology is dexterously referenced on printed circuit board (PCB) (PCB) by the computer MSR Information system of professor leader, and utilizes printing vibrator
Director, feed oscillator and reflector function are realized with earth plate, the size of traditional yagi aerial is reduced.Simultaneously in antenna
In structure use 1/4 wavelength shifter, balance balun, differential mode feed etc. technology, the arrowband solved in traditional yagi aerial is asked
Topic, for the moment as international study hotspot, and is named as Quasi-Yagi antenna (Quasi Yagi-Uda by this antenna
Antenna).Subsequent work realizes wideband mainly around further broadening bandwidth, multifrequency and for Quasi-Yagi antenna array
Expansion, and achieve good achievement in research.
As shown in figure 1, traditional Quasi-Yagi antenna is made up of reflector, feed oscillator and director, in terms of lateral dimension
Feed oscillator overall length Ldri is about (0.45~0.48) λ0, λ0For radiation signal free space wavelength, reflector length Lref is omited
It is longer than feed oscillator, director is slightly shorter than feed oscillator, thus lateral length should be slightly bigger than 0.5 λ0；Analyzed from longitudinal length, instead
Emitter and feed element spacing Sref are about 0.2 λ0, feed oscillator is 0.2 λ with director interval S dir0, thus traditional ternary eight
The size of wooden antenna is about 0.5 λ0*0.4λ0。
Above-mentioned conclusion is placed in micro-strip yagi aerial, as shown in Fig. 2 because medium is acted on, the unit transverse such as feed oscillator
Size has certain diminution, but is due to the influence that there is medium-air border to electromagnetic signal, and antenna end is still needed to and is situated between
Matter edge is at regular intervals, so general 0.5 λ still used0Selection size；Longitudinal direction aspect, feed oscillator and coplanar striplines,
Differential mode feed circuit, balun are connected, and the latter has the effect for stablizing bandwidth, and length is about 0.25 λ0.It is simultaneously micro- in view of antenna
The length of ribbon feeder, longitudinal size, which is integrally calculated, to be come, also about 0.5 λ0, the size of antenna substrate is typically slightly larger than 0.5 λ0.To realize
During high-gain, such as increase director number size can become much larger.
Understand, the size of the ternary Quasi-Yagi antenna is 0.5 λ0*0.5λ0.Longitudinally it is laid out using this, antenna size is indulged
There is quite a few to be balanced balun to length to take so that from the point of view of the overall structure of Quasi-Yagi antenna, layout is more loose,
Whole antenna structure seems that volume is larger.
Utility model content
Main purpose of the present utility model be to overcome in the prior art, propose one kind reduced from longitudinal size,
And can ensure that the easy miniaturization yagi aerial of good electrical performance characteristic.
The utility model is adopted the following technical scheme that：
A kind of easy miniaturization yagi aerial, including medium substrate, be arranged at the positive feeder of the medium substrate,
Balun, differential mode feed circuit, coplanar striplines, feed oscillator and director are balanced, and is arranged at the ground connection of the medium substrate reverse side
Piece；It is characterized in that：The feeder one end connects antenna port, other end connection balance balun one end；The balance balun is another
One end is connected with differential mode feed circuit one end, and the feeder is arranged in the medium substrate one end with balance balun horizontal alignment
Side；The differential mode feed circuit other end is connected with coplanar striplines one end, and the differential mode feed circuit is horizontally disposed in medium
The opposite side at the substrate end；The feed oscillator is horizontally disposed in the middle part of the medium substrate, the source and coplanar striplines of feed oscillator
The other end is connected；The director is flatly arranged in the medium substrate other end.
It is preferred that, the ground strip is also as reflector, and it is located at one end corresponding with the differential mode feed circuit, and it is grown
Spend for 0.45 λ -0.46 λ.
It is preferred that, the scope of the relative dielectric constant of the medium substrate is 3-6.5.
It is preferred that, the feed oscillator length is 0.23 λ -0.27 λ.
It is preferred that, the length of the medium substrate is 0.45 λ -0.46 λ, and width is 0.37 λ -0.40 λ.
From above-mentioned to description of the present utility model, compared with prior art, the utility model has following beneficial effect
Really：
1st, yagi aerial of the present utility model, will balance balun and feeder it is horizontal to reduce longitudinal length；So as to real
Now minimize so that antenna structure is more compact, moreover it is possible to ensure good electrical performance characteristic.
2nd, yagi aerial of the present utility model, using the higher medium substrate of point constant that is situated between, can efficiently reduce and guide into
The length of device, feed oscillator and reflector.
Brief description of the drawings
Fig. 1 is existing yagi aerial schematic diagram；
Fig. 2 is existing micro-strip yagi aerial schematic diagram；
Fig. 3 is the utility model yagi aerial structure chart (front)；
Fig. 4 is the utility model yagi aerial structure chart (reverse side)；
Fig. 5 is the utility model yagi aerial structure chart (side)；
Fig. 6 is the utility model yagi aerial dimensional drawing；
Fig. 7 is the utility model 915MHz simulated gains figure (E faces)；
Fig. 8 is the utility model 915MHz simulated gains figure (H faces)；
Fig. 9 is the standing-wave ratio and frequency relation figure that the utility model is emulated；
Wherein：10th, medium substrate, 11, ground strip, 20, director, 30, feed oscillator, 40, coplanar striplines, 50, differential mode
Feed circuit, 60, balance balun, 70, feeder.
Embodiment
Below by way of embodiment, the utility model will be further described.
Reference picture 3 is arranged at the positive feeder 70 of the medium substrate 10, balance bar to Fig. 6, including medium substrate 10
Human relations 60, differential mode feed circuit 50, coplanar striplines 40, feed oscillator 30 and director 20, and it is arranged at the reverse side of medium substrate 10
Ground strip 11, the length of the medium substrate is 0.45 λ -0.46 λ, and width is 0.37 λ -0.40 λ, the relative medium of medium substrate
The scope of constant is 3-6.5.The feeder 70 is microstrip line, its one end connection antenna port, other end connection balance balun
60 one end.The balance balun 60 is microstrip line, and its other end is connected with the one end of differential mode feed circuit 50, the peace of feeder 70
It is arranged in the side of the one end of medium substrate 10 the weighing apparatus horizontal alignment of balun 60；The other end of differential mode feed circuit 50 and coplanar strip
The one end of line 40 is connected, and the horizontally disposed opposite side in the end of medium substrate 10 of differential mode feed circuit 50, differential mode feed electricity
Road 50 is microstrip line.If the differential mode feed circuit 50 is located at the right side of medium substrate 10, feeder 70 and balance balun 60
In left side；Differential mode feed circuit 50 is located at the left side of medium substrate 10, then feeder 70 and balance balun 60 are located at medium substrate
10 right sides.The length of the balance balun 60 is the 1/4 of guide wavelength.In order to ensure the stability of input signal, feeder 70
Length about retain 0.1 λ, resistance is 50 Ω0
The feed oscillator 10 is printing vibrator, and its is horizontally disposed in the middle part of the medium substrate 10, the source of feed oscillator 30 with
The other end of coplanar striplines 40 is connected, and 30 liang of spoke sides of feed oscillator have certain distance apart from the edge of medium substrate 10.The feed shakes
The length of son is 0.23 λ -0.27 λ.
Director of the present utility model is printing vibrator, and it is flatly arranged in the medium substrate other end.The director
It is left white between 20 and the edge of medium substrate 10.The length of director 20 is less than the length of feed oscillator 30.
The backside grounding piece 11 of medium substrate 10 is alternatively arranged as reflector, and the ground strip 11 is located at and the phase of differential mode feed circuit 50
Correspondence one end, its length is 0.45 λ -0.46 λ.
For doing sample test in 902MHZ-928MHZ frequency range, it is designed with center frequency point 915MHZ, director
20th, the relative dimensions such as feed oscillator 30, feed oscillator feeder line 50, differential mode feed circuit 50, balance balun 60, feeder 70 are big
It is small and mutual alignment relation apart from shown in size reference picture 6, size range is as follows：The length aa of ground strip 11 is 138mm-
142mm, feed oscillator length Ldir are 78mm-82mm, and the length aa of medium substrate is 138mm-142mm, and width bb is
118mm-122mm。
The material of medium substrate 10 is epoxy resin or polytetrafluoroethylene (PTFE), and its substrate dielectric constant is 6.15, loss angle
Just it is cut to 0.0028, thickness h=1.27mm, the size dimension difference aa=of the Quasi-Yagi antenna of miniaturization of the present utility model
140mm, bb=120mm, less than the 1/2 of 915MHz free space wavelengths.Specific Optimal Parameters are as follows：
Model is emulated using HFSS softwares, test result is shown, in 902MHZ-928MHZ frequency ranges, with compared with
For outstanding electric property, reference picture 9 is standing-wave ratio and the graph of a relation of frequency；Reference picture 7, Fig. 8, respectively E faces and H faces
915MHz simulated gain figures.
Embodiment of the present utility model is above are only, but design concept of the present utility model is not limited thereto,
All changes for carrying out unsubstantiality to the utility model using this design, all should belong to the row for invading the utility model protection domain
For.
Claims (5)
1. a kind of easy miniaturization yagi aerial, including medium substrate, are arranged at the positive feeder of the medium substrate, put down
Weigh balun, differential mode feed circuit, coplanar striplines, feed oscillator and director, and is arranged at the ground strip of the medium substrate reverse side；
It is characterized in that：The feeder one end connects antenna port, other end connection balance balun one end；The balance balun other end
It is connected with differential mode feed circuit one end, the feeder is arranged in the one of the medium substrate one end with balance balun horizontal alignment
Side；The differential mode feed circuit other end is connected with coplanar striplines one end, and the differential mode feed circuit is horizontally disposed in medium substrate
The opposite side at the end；The feed oscillator is horizontally disposed in the middle part of the medium substrate, and the source and coplanar striplines of feed oscillator are another
End is connected；The director is flatly arranged in the medium substrate other end.
2. a kind of easy miniaturization yagi aerial as claimed in claim 1, it is characterised in that：The ground strip is also as anti-
Emitter, it is located at one end corresponding with the differential mode feed circuit, and its length is 0.45 λ -0.46 λ.
3. a kind of easy miniaturization yagi aerial as claimed in claim 1, it is characterised in that：The medium substrate it is relative
The scope of dielectric constant is 3-6.5.
4. a kind of easy miniaturization yagi aerial as claimed in claim 1, it is characterised in that：The feed oscillator length is
0.23λ-0.27λ。
5. a kind of easy miniaturization yagi aerial as claimed in claim 1, it is characterised in that：The length of the medium substrate
For 0.45 λ -0.46 λ, width is 0.37 λ -0.40 λ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720009766.5U CN206349517U (en) | 2017-01-05 | 2017-01-05 | A kind of easy miniaturization yagi aerial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720009766.5U CN206349517U (en) | 2017-01-05 | 2017-01-05 | A kind of easy miniaturization yagi aerial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206349517U true CN206349517U (en) | 2017-07-21 |
Family
ID=59323582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720009766.5U Expired - Fee Related CN206349517U (en) | 2017-01-05 | 2017-01-05 | A kind of easy miniaturization yagi aerial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206349517U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767448A (en) * | 2018-06-08 | 2018-11-06 | 河南师范大学 | A kind of small size double frequency list feedback omnidirectional antenna |
| CN113782955A (en) * | 2021-08-24 | 2021-12-10 | 天津大学 | Broadband high-gain compressed high-order mode yagi antenna |
-
2017
- 2017-01-05 CN CN201720009766.5U patent/CN206349517U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767448A (en) * | 2018-06-08 | 2018-11-06 | 河南师范大学 | A kind of small size double frequency list feedback omnidirectional antenna |
| CN113782955A (en) * | 2021-08-24 | 2021-12-10 | 天津大学 | Broadband high-gain compressed high-order mode yagi antenna |
| CN113782955B (en) * | 2021-08-24 | 2023-06-16 | 天津大学 | Broadband high-gain compressed high-order mode yagi antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170721 Termination date: 20180105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |