CN1725558A - Design method of logarithmically periodic dipole array antenna structure - Google Patents
Design method of logarithmically periodic dipole array antenna structure Download PDFInfo
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- CN1725558A CN1725558A CN 200510075055 CN200510075055A CN1725558A CN 1725558 A CN1725558 A CN 1725558A CN 200510075055 CN200510075055 CN 200510075055 CN 200510075055 A CN200510075055 A CN 200510075055A CN 1725558 A CN1725558 A CN 1725558A
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Abstract
This invention relates to a log-periodic dipole array antenna (LPDA antenna) structure design method, which utilizes the diameter of a round Al tube the width of the square Al tube, the length of the square Al tube from the first antenna, distance between the square Al tubes and the mode and position of the feeding-in point of a coaxial cable and utilizes 27 experiments to finish and optimizes process with a DOE to reduce experiment times and save time and cost.
Description
Technical field
The present invention relates to a kind of logarithm period dipole array antenna construction design method, refer in particular to a kind of five parameters utilizing antenna, finish the logarithm period dipole array antenna construction design method of optimizer in a simplified manner.
Background technology
Logarithm period dipole array antenna structural design is quite complicated usually, must consider the shape (length, width and the diameter that comprise each assembly) of antenna, to obtain best signal receiving strength.
The data of estimating logarithm period dipole array antenna quality have usually voltage standing wave ratio (VSWR, Voltage Standing Wave Ratio) and antenna factor (A/F, AntennaFactor).The power gain of the lower expression antenna of the value of antenna factor is bigger.
Common logarithm cycle dipole array antenna structure Design need be utilized 35=243 experiment usually at present, spend the many time just can try to achieve a satisfactory logarithm period dipole array antenna, and experiment just must be made an antenna and be verified its experimental result each time, and engineering is quite great.Therefore, how reducing experiment number to get an optimal results, is the problem that the present invention pays close attention to.
Summary of the invention
The objective of the invention is with planning of experiments method (DOE), in 27 experiments, can design the logarithm period dipole array antenna an of the best, can reduce design time and cost.
For achieving the above object, this case proposes a kind of logarithm period dipole array antenna construction design method, be round aluminum pipe diameter, square aluminum pipe width, the length of first antenna of square aluminum pipe front end distance, the distance at two square aluminum pipes interval and five variablees of mode and position of coaxial wire (Cable) load point that utilize described antenna, with a planning of experiments method (DOE), utilize 27 experiments to finish an optimizer.
The result of described optimizer can get length=50mm, (4) two square aluminum pipes distance=13mm at interval and the mode and the position=10mm of (5) coaxial wire (Cable) load point of (1) round aluminum pipe diameter=15mm, (2) square aluminum pipe width=31.8mm, first antenna of (3) square aluminum pipe front end distance; Above-mentioned dimensional tolerance is positive and negative 0.1mm.
Described planning of experiments method (DOE) is a decrement planning of experiments method (DOE), can be from 3
5=243 experiments are kept to 3
5-2=27 experiments, but the planning of experiments method still be five factors (Factorial Design) method of three levels of complexity comparatively.
The method that the present invention proposes can reduce experiment number, saves time and expense.
Description of drawings
Fig. 1 is the logarithm period dipole array antenna schematic diagram of the preferred embodiment of the present invention;
Fig. 2 is the round aluminum pipe width of the logarithm period dipole array antenna design drawing of the preferred embodiment of the present invention;
Fig. 3 is the round aluminum pipe structural representation of the preferred embodiment of the present invention;
Fig. 4 is the circular aluminum pipe schematic diagram of the preferred embodiment of the present invention
Fig. 5 is the square aluminum pipe schematic diagram of the preferred embodiment of the present invention;
Fig. 6 points out square aluminum pipe chart spacing for the preferred embodiment of the present invention;
Fig. 7 points out load point and first round aluminum pipe position view for the preferred embodiment of the present invention;
Fig. 8 is the parameter designing schematic diagram of LPDA antenna.
[primary clustering symbol description]
11,12... square aluminum pipe
13.... round aluminum pipe
D2.... square aluminum pipe width
D3.... square aluminum pipe front end is apart from the length of first antenna
D4.... two square aluminum pipes distance at interval
D5.... the mode and the position of coaxial wire (Cable) load point
Embodiment
This case is the design to the LPDA antenna structure, be to utilize correlation formula to obtain the parameter of LPDA antenna size, simulate several groups of preferable size and the real works of antenna performance with Electromagnetic Simulation software NEC again and measure the comparison of going to perform an analysis, on real the work, antenna is being divided into 5 variablees, utilizing these 5 variablees to go to do collocation analyzes, through experimental analysis and measurement repeatedly, and finally obtain the LPDA antenna of characteristic good, it as shown in Figure 1, the round aluminum pipe 13 of two square aluminum pipes 11,12 and three twelve earthly branches is arranged.
Present embodiment for design one frequency range from 200MHz the LPDA antenna to 1000MHz, first derive suitable antenna size with theoretical formula, wherein the design parameter meaning of LPDA antenna as shown in Figure 8.
Because described LPDA antenna use antenna for measuring, so its antenna size must do to consider to design, so gets the parameter that τ=0.86, σ=0.065 are used as designing, and removes to determine every antenna L
nLength and antenna between apart from d
n, after the needed size decision of antenna, just other variable to antenna adjusts, and the LPDA antenna is divided into 5 variablees tests, and 5 variablees are as follows:
(1) round aluminum pipe width
(2) square aluminum pipe width
(3) length of first antenna of square aluminum pipe front end distance
(4) two square aluminum pipes distance at interval
(5) mode and the position of coaxial wire (Cable) load point
Again through repeatedly the experiment measurement under, obtain these 5 parameters when following size, the characteristic of its voltage standing wave ratio (VSWR) is best, the size of its 5 parameters as shown in Figure 2:
| Aluminum pipe | Diameter (centimetre) |
| No.1 | 10.5 |
| No.2 | 12.15 |
| No.3 | 14.1 |
| No.4 | 19.275 |
| No.5 | 19.275 |
| No.6 | 19.275 |
| No.7 | 19.275 |
| No.8 | 19.275 |
| No.25 | 10.5 |
| No.26 | 12.3 |
| No.27 | 14.1 |
| No.28 | 19.275 |
| No.29 | 19.275 |
| No.30 | 19.275 |
| No.31 | 19.275 |
| No.32 | 19.275 |
Fig. 3 is the structural representation of round aluminum pipe, and Fig. 4 is the schematic diagram of circular aluminum pipe, and Fig. 5 is the overall structure of square aluminum pipe, and wherein, the width of square aluminum pipe is 31.8mm * 31.8mm, and the length of first antenna of aluminum pipe front end distance is 50mm.What Fig. 6 pointed out two square aluminum pipes interval is 15mm apart from d4.The 7th figure points out that load point and first round aluminum pipe position are at a distance of d5=10mm.
Utilize the design of this case, can get:
(1) round aluminum pipe diameter=15mm;
(2) square aluminum pipe width d2=31.8mm;
(3) the length d 3=50mm of first antenna of square aluminum pipe front end distance;
(4) two square aluminum pipes at interval apart from d4=13mm;
(5) mode and the position d5=10mm of coaxial wire (Cable) load point; Above-mentioned dimensional tolerance is positive and negative 0.1mm.
Claims (3)
1. logarithm period dipole array antenna construction design method, it is characterized in that: be the round aluminum pipe diameter that utilizes antenna, square aluminum pipe width, first antenna of square aluminum pipe front end distance length, two square aluminum pipes at interval distance and the mode of coaxial wire (Cable) load point and position as five variablees, with a planning of experiments method (DOE), utilize 27 experiments to finish an optimizer.
2. logarithm period dipole array antenna construction design method as claimed in claim 1 is characterized in that: the result of described optimizer can access round aluminum pipe diameter=15mm, square aluminum pipe width=31.8mm, the length=50mm of first antenna of square aluminum pipe front end distance, the distance=13mm at two square aluminum pipes interval and the mode and the position=10mm of coaxial wire (Cable) load point; Above-mentioned dimensional tolerance is positive and negative 0.1mm.
3. logarithm period dipole array antenna construction design method as claimed in claim 1 is characterized in that: wherein said planning of experiments method (DOE) is a decrement planning of experiments method (DOE), can be from 3
5=243 experiments are kept to 3
5-2=27 experiments, the real plan law still is five factors (Factorial Design) method of three levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510075055 CN1725558A (en) | 2005-06-08 | 2005-06-08 | Design method of logarithmically periodic dipole array antenna structure |
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| CN 200510075055 CN1725558A (en) | 2005-06-08 | 2005-06-08 | Design method of logarithmically periodic dipole array antenna structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515707B (en) * | 2013-09-29 | 2016-01-20 | 深圳市顶一精密五金有限公司 | A kind of rotation system of H-face array shortwave logarithm three-dimensional array antenna |
| CN105337042A (en) * | 2015-10-16 | 2016-02-17 | 天津七六四通信导航技术有限公司 | Log-periodic antenna applied in meter wave frequency band |
| CN114976656A (en) * | 2022-05-25 | 2022-08-30 | 西安电子科技大学 | Miniaturized log-periodic antenna with n-shaped bending unit |
-
2005
- 2005-06-08 CN CN 200510075055 patent/CN1725558A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515707B (en) * | 2013-09-29 | 2016-01-20 | 深圳市顶一精密五金有限公司 | A kind of rotation system of H-face array shortwave logarithm three-dimensional array antenna |
| CN105337042A (en) * | 2015-10-16 | 2016-02-17 | 天津七六四通信导航技术有限公司 | Log-periodic antenna applied in meter wave frequency band |
| CN114976656A (en) * | 2022-05-25 | 2022-08-30 | 西安电子科技大学 | Miniaturized log-periodic antenna with n-shaped bending unit |
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