CN207199839U - A kind of microwave section ultra-wideband high-gain log-periodic antenna - Google Patents
A kind of microwave section ultra-wideband high-gain log-periodic antenna Download PDFInfo
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- CN207199839U CN207199839U CN201720333409.4U CN201720333409U CN207199839U CN 207199839 U CN207199839 U CN 207199839U CN 201720333409 U CN201720333409 U CN 201720333409U CN 207199839 U CN207199839 U CN 207199839U
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Abstract
The utility model discloses a kind of microwave section ultra-wideband high-gain log-periodic antenna, it is characterized in that, it mainly includes two groups of oscillators, the distributing point that two element combinations are drawn, the high frequency cable for being provided with joint, reflection back box and installation folder code, two groups of oscillators are fixed on the top of reflection back box, the installation folder code is arranged on below reflection back box by fixed screw, and high frequency cable is connected through reflection back box with oscillator；Wherein director dipole is equipped with one group of oscillator.Two groups of oscillators include two asymmetric vibrators and formed, and distributing point is disposed therein the top of one group of oscillator.The utility model has simple in construction, and attractive appearance is compact, gain can be greatly improved, and half-power angle controls very well, it is front and rear than also being strengthened, standing-wave ratio the advantages that debugging well.
Description
Technical field
Antenna technical field is the utility model is related to, more particularly to a kind of ultratvide frequency band log-periodic antenna, frequency
Rate scope：2200-5900MHZ, its gain can reach 10~12dBi, microwave section ultra-wideband high-gain log-periodic antenna.
Background technology
Directional aerial can be used as indoor and outdoors, to comparing before and after antenna structure, outward appearance, performance, high-gain, height,
The advantages that each frequency half-power angle is up to standard, when being covered indoors with outdoor electromagnetic wave signal, there is more preferable network service effect.Adopt
Initially parsed with design is set to a couple of days several weeks line, using etc. ratio method formula calculated, its advantage be frequency it is wide
Band is very wide, and its gain is difficult to improve to certain degree, although antenna size is increased, but according to designing antenna to necessarily
During strong point, caused by the generation and the loss of itself of superposition factor, just lengthening etc. can not also improve antenna increasing than exciting unit number
Benefit, the problems such as also influenceing antenna other indexs.Therefore need to design a kind of high-gain logarithm period and add the directional aerial guided into.
Utility model content
The purpose of this utility model is exactly in order to solve the deficiency of prior art, and the one kind provided is not only simple in structure,
And multiple networks with different systems systems can be covered, and antenna gain is high, and half-power cone of coverage control must well, front and rear than good
Microwave section ultra-wideband high-gain log-periodic antenna.
The utility model is to realize above-mentioned purpose using following technical solution：
A kind of microwave section ultra-wideband high-gain log-periodic antenna, it is characterised in that it mainly shakes including two groups of oscillators, two
The distributing point of sub-portfolio extraction, the high frequency cable for being provided with joint, reflection back box and installation folder code, two groups of oscillators are fixed on reflection
The top of back box, the installation folder code by fixed screw be arranged on reflection back box below, high frequency cable through reflection back box with
Oscillator connects；Wherein director dipole is equipped with one group of oscillator.
Formed as a further illustration of the above scheme, two groups of oscillators include two asymmetric vibrators, distributing point is set
Put the top of one group of oscillator wherein.
Further, the spacing between the director dipole uses 0.15~0.20 λ, and this log-periodic antenna guides radical into
For Unit 12, guide length dimension into for every and be followed successively by：0.4~0.44 λ, 0.4~0.43 λ, 0.41~0.42 λ, 0.39~0.41
λ, 0.39~0.4 λ, 0.38~0.39 λ, 0.37~0.385 λ, 0.365~0.378 λ, 12 unit oscillators are calculated according to real
Spacing between long size and unit.
The beneficial effect that the utility model can be reached using above-mentioned technical solution is：
The utility model uses encourages oscillator as logarithm period base antenna using the ratios such as existing 12 groups, then in feed end
12 units of increase are guided into improve each performance indications in front of mouthful, and coupling process is used between encouraging and guiding into, makes two groups to shake
Each unit mutual coupling between son, antenna property indices are improved, and guided into lengthening will not be to whole antenna direction performance
Cause to make a variation；Antenna overall structure is simple, and attractive appearance is compact, gain can be greatly improved.Controlled very well with half-power angle
System, it is front and rear than also strengthen, standing-wave ratio the advantages that debugging well, in nowadays networked information era, to user in wireless network letter
Number covering can have more selections.
Brief description of the drawings
Fig. 1-3 is the structural representation of the utility model oscillator；
Fig. 4 is the utility model primary structure schematic diagram therein；
Fig. 5 widens oscillator mobile jib structural representation for the utility model is therein；
Fig. 6 is the structural representation of director dipole；
Fig. 7 is increase director dipole combining structure schematic diagram of the present utility model.
Description of reference numerals：1 reflection back box, 2 folder code fixed screws, 3 installation folder codes, 4 high frequency cables, 5 joints, (A, B)
Oscillator, C director dipoles, F distributing points.
Embodiment
The technical program is explained in detail below in conjunction with specific embodiment.
As shown in Fig. 1-Fig. 7, the utility model is a kind of microwave section ultra-wideband high-gain log-periodic antenna, and it is mainly wrapped
Include two groups of oscillators (A, B), the distributing point F that two element combinations are drawn, the high frequency cable 4 for being provided with joint 5, reflection back box 1 and peace
Clamping code 3, two groups of oscillators are fixed on the top of reflection back box 1, and the installation folder code 3 is arranged on instead by pressing from both sides code fixed screw 2
The lower section of back box 1 is penetrated, high frequency cable 4 is connected through reflection back box 1 with oscillator (A, B)；It is equipped with and guides on one group of oscillator A wherein
Oscillator C.Two groups of oscillators are two asymmetric vibrators, and distributing point F is disposed therein one group of oscillator A top.
According to log-periodic antenna principle, given (A, B) two groups of oscillators are that Unit 12 are respectively Fig. 1 and Fig. 3, by formula
First calculate the α angle number of degrees, then with etc. calculate oscillator length and spacing, design formula than formula：τ=dn+1/dn=Ln+1/
Ln=Rn+1/Rn=an+1/an calculates σ intervals and oscillator end line α angles again.Because antenna greatest irradiation is being fed
End, given wait than oscillator is Unit 12, so this time τ spans：0.8~0.95；σ spans：0.08~0.15.It is other
Some computational methods can go out approximate dimensions with primary Calculation, aid in calculating using software according to being carried out to several weeks design formula
(PCAAD software for calculation), more preferable oscillator length and spacing can be drawn before model is made, then entered again in actually debugging
Step optimization oscillator length and spacing.Two groups of oscillators of AB are designed by more design method, 2 element combination F points are distributing point, main
Product is formed by reflection back box 1, folder code fixed screw 2, installation folder code 3, high frequency cable 4, joint 5.By vector network point
Standing-wave ratio is bigger than normal after analyzer test, widens oscillator mobile jib at A oscillators three in actual debugging process, can reach change action and change
Variable resistance anti-current, debugging come out shift one's position respectively A1, A2, A3 (such as Fig. 5).Transformation line can be determined according to tune parameter index
Width, it is modified change transformation can debug out more satisfactory performance indications.
To antenna radiation pattern index test, it is found that the gain index in antenna direction performance is not ideal, do not reach and set
Meter requires, improves gain waiting than adding group Yagi spark gap Directional Antenna before oscillator according to previous experiences, moreover it is possible to before improving antenna
Afterwards than with improve directional diagram half-power angle.
Design method is guided into reference to yagi aerial, and director dipole C calculates each oscillator length successively based on using high band.
Spacing between oscillator uses 0.15~0.20 λ, and it is Unit 12 that this logarithm period yagi aerial, which guides radical into, and every is guided into length
Size is followed successively by：0.4~0.44 λ, 0.4~0.43 λ, 0.41~0.42 λ, 0.39~0.41 λ, 0.39~0.4 λ, 0.38~
0.39 λ, 0.37~0.385 λ, 0.365~0.378 λ, between being calculated between the long size of 12 unit oscillators and unit
Away from.In order to reach more preferable performance, mobile jib transformation line (such as Fig. 6) is guided into guiding C1, C2 into and widening, in debugging voltage standing wave(VSW)
Than transforming impedance effect can be played, its performance is set to reach optimum efficiency.Measurement direction figure performance after mobile jib C1, C2 is guided into widening
To all Index Influences in zone of reasonableness, can increase at the conversion line width of mobile jib.
Carry out all directions testing performance index to being assembled into product, in detection device 2D directional diagrams room the axle of darkroom far field three from
Dynamicization test system, actual test, test letter lid movement WLAN, WiFi, WiMAX, 4G wireless communication are carried out to this product
Deng two face H horizontal planes of detection and E elevation radiation patyterns.System testing goes out two work(of face directional diagram half of horizontal plane and vertical plane
Rate angle, front and rear when gain are equivalent, and institute's test result meets design requirement.
The utility model compared with prior art, is waited than day based on excitation oscillator log-periodic antenna using existing
Line, then increase in front of feed port and guide into improve each performance indications, it is the side of coupling with being used between guiding into waiting than excitation
Method, lengthen and guide into and whole antenna direction performance will not be caused to make a variation, each index, which has, to be greatly improved.
Above-described is only preferred embodiment of the present utility model, it is noted that for the ordinary skill of this area
For personnel, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.
Claims (3)
1. a kind of microwave section ultra-wideband high-gain log-periodic antenna, it is characterised in that it mainly shakes including two groups of oscillators, two groups
The distributing point of sub-portfolio extraction, the high frequency cable for being provided with joint, reflection back box and installation folder code, two groups of oscillators are fixed on reflection
The top of back box, the installation folder code by fixed screw be arranged on reflection back box below, high frequency cable through reflection back box with
Oscillator connects；Wherein director dipole is equipped with one group of oscillator.
2. a kind of microwave section ultra-wideband high-gain log-periodic antenna according to claim 1, it is characterised in that described two
Group oscillator includes two asymmetric vibrators and formed, and distributing point is disposed therein the top of one group of oscillator.
A kind of 3. microwave section ultra-wideband high-gain log-periodic antenna according to claim 1, it is characterised in that this logarithm
Periodic antenna director dipole radical is 12 dricetor elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720333409.4U CN207199839U (en) | 2017-03-31 | 2017-03-31 | A kind of microwave section ultra-wideband high-gain log-periodic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720333409.4U CN207199839U (en) | 2017-03-31 | 2017-03-31 | A kind of microwave section ultra-wideband high-gain log-periodic antenna |
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| Publication Number | Publication Date |
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| CN207199839U true CN207199839U (en) | 2018-04-06 |
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| CN201720333409.4U Active CN207199839U (en) | 2017-03-31 | 2017-03-31 | A kind of microwave section ultra-wideband high-gain log-periodic antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021819A (en) * | 2019-04-23 | 2019-07-16 | 中国电子科技集团公司第三十八研究所 | Microband printing ultra wide band log-periodic antenna and antenna array |
| CN111370858A (en) * | 2018-12-25 | 2020-07-03 | 杭州海康威视数字技术股份有限公司 | Directional UHF antenna and electronic equipment |
| CN111769363A (en) * | 2020-07-01 | 2020-10-13 | 中国电子科技集团公司第三十六研究所 | Ultra-wideband constant-beam directional antenna |
| CN112510373A (en) * | 2020-10-30 | 2021-03-16 | 西安方元明科技股份有限公司 | Log-periodic antenna for receiving front end of jammer |
-
2017
- 2017-03-31 CN CN201720333409.4U patent/CN207199839U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370858A (en) * | 2018-12-25 | 2020-07-03 | 杭州海康威视数字技术股份有限公司 | Directional UHF antenna and electronic equipment |
| CN111370858B (en) * | 2018-12-25 | 2022-11-01 | 杭州海康威视数字技术股份有限公司 | Directional UHF antenna and electronic equipment |
| CN110021819A (en) * | 2019-04-23 | 2019-07-16 | 中国电子科技集团公司第三十八研究所 | Microband printing ultra wide band log-periodic antenna and antenna array |
| CN111769363A (en) * | 2020-07-01 | 2020-10-13 | 中国电子科技集团公司第三十六研究所 | Ultra-wideband constant-beam directional antenna |
| CN112510373A (en) * | 2020-10-30 | 2021-03-16 | 西安方元明科技股份有限公司 | Log-periodic antenna for receiving front end of jammer |
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