CN109871617A - Fragment type multi-band antenna structure design method - Google Patents
Fragment type multi-band antenna structure design method Download PDFInfo
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Abstract
The invention discloses a kind of Fragment type multi-band antenna structure design methods, including building antenna initial model and determining design section；The objective function of design；Design section is discrete for sub- design section；It constructs different Antenna Design regional structures and encodes；The corresponding antenna response value of each day line coding is obtained, target function value is sought and obtains the current optimum code of whole of all individuals；Target function value is judged, the Fragment type multi-band antenna structure for meeting design requirement is obtained.The method of the present invention can significantly improve the solution efficiency of Fragment type Antenna Construction Design problem, especially higher-dimension Antenna Design problem and obtain performance more preferably antenna structure when solving the problems, such as Fragment type Antenna Construction Design.
Description
Technical field
Present invention relates particularly to a kind of Fragment type multi-band antenna structure design methods.
Background technique
With the fast development of radio communication technology, the miniaturization of wireless telecom equipment, intelligence and multifunctional integrated
Changing design gradually attracts people's attention.Important component of the antenna as wireless telecom equipment realizes guided wave and oneself
By the energy conversion between space wave, guarantee is provided for the radiation and reception of electromagnetic wave, the quality of antenna performance is to entire nothing
The performance of linear system system is by very big influence.The development of modern wireless communication systems do not require nothing more than antenna with light weight and cost it is low,
It is easily fabricated and the features such as be easily integrated, also the miniaturization of antenna, broadband, multiband, conformal and integrated design are proposed
Unprecedented requirement.
Fragment type Antenna Construction Design is designed different from antenna parameter, and the original shape for giving an antenna, which designs, to be connected
Continuous parametric variable, and a design section need to be only given, Binary Zero/1 coding is mapped as after discretization, it is different by designing
Coded combination finds the antenna structure for suitably meeting Antenna Design demand.Fragment type Antenna Construction Design result
It is often unexpected, influence and limitation of the designer by traditional antenna Design Thinking are avoided, is beneficial to design creative
Antenna pattern, and Fragment type Antenna Construction Design is particularly suitable for wireless and portable communication products built-in antennas
Design, since such antenna is generally limited to a certain given space.Therefore, Fragment type Antenna Construction Design is actually being answered
There are huge design potentiality in, and can effectively shorten the design cycle, while being meaned using suitable intelligent algorithm lower
Development cost.It huge is calculated as however, Fragment type Antenna Construction Design based on traditional radix-2 algorithm is generally existing
Sheet and the higher problem of design variable dimension.Therefore, there is no a kind of Fragment type antenna structures being simple and efficient at present
Design method.
Summary of the invention
The purpose of the present invention is to provide one kind be suitable for higher-dimension discrete type Fragment type multi-band antenna structure and
The Fragment type multi-band antenna structure design method being simple and efficient.
This Fragment type multi-band antenna structure design method provided by the invention, includes the following steps:
S1. antenna initial model is constructed, while determining design section；
S2. the objective function designed according to Antenna Design demand constructing antennas；
S3. design section is discrete for several sub- design sections；
S4. the structure of the different Fragment type multiband antenna design section of construction several groups, and it is corresponding to obtain its
Coding；
S5. the response of the corresponding antenna of each day line coding of obtaining step S4 construction, it is corresponding to seek each antenna
Target function value, to obtain the current optimum code of whole of all individuals；
S6. the step S5 target function value being calculated is judged, to obtain meeting design requirement
Fragment type multi-band antenna structure.
Objective function described in step S2 is each performance indicator of antenna, including antenna return loss value, gain or stays
Bobbi etc..
The structure of the different Fragment type multiband antenna design section of construction several groups described in step S4, specially
In conjunction with the knot of the different Fragment type multiband antenna design section of priori knowledge and antenna structure symmetry construction several groups
Structure.
The structure of the different Fragment type multiband antenna design section of the construction several groups, specially using such as
Lower step structural texture:
A. design section inscribe slot length L is calculated according to grooving formula；
B. the random initializtion fluting starting point in design section, and start of record position is a1；
C. with position ai-1Centered on, it is randomly selected in given design region and position ai-1Adjacent region records position
It is set to ai, i=1,2 ..., L；
Whether the record position that D. checking procedure C chooses is Chong Die with the position chosen before: giving birth to again if overlapping
At position ai, step C and D are repeated if not being overlapped and continues to generate follow-up location, until L position all generates；
It E. will be with (a of generation1...ai...aL) slotting position generated in symmetrical region is overturn according to symmetry axis；
F. step step B~E is repeated, initialization generates the different Fragment type multiband antenna design section of several groups
Coding.
Design section inscribe slot length L is calculated according to grooving formula described in step A, is specially calculated using following rule
Grooving length L:
Situation 1: it is suitable for the case where score line feature is two terminal shortcircuit
Construct half-wave resonator, and the effective length of groovingWherein c is the free space of light
Speed, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p is constant and takes
Being worth range is [0,5]；
Situation 2: it is suitable for the case where score line feature is one end open circuit, another terminal shortcircuit
Construct quarter-wave resonance device, and the effective length of groovingWherein c is oneself of light
By space velocity, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p is normal
Number and value range are [0,5].
The response of the corresponding antenna of each day line coding of the construction of obtaining step S4 described in step S5, specially uses
Electromagnetic Simulation tool emulates the corresponding antenna of each day line coding, to obtain the corresponding antenna of each day line coding
Response.
The current optimum code of whole that all individuals are obtained described in step S5 specially obtains target letter in all individuals
Number individual UVR exposure corresponding when optimal.
The step S5 target function value being calculated is judged described in step S6, specially using following rule into
Row judgement:
If target function value meets Antenna Design requirement, corresponding to the corresponding individual UVR exposure of target function value
Fragment type multiband antenna is final structure；
If target function value does not meet Antenna Design requirement, repeatedly step S4~S6, until target function value meets day
Line design requirement or duplicate number reach the number being previously set.
This Fragment type multi-band antenna structure design method provided by the invention, by its given design discrete region
For many small design sections, initialized using the symmetry of priori knowledge and design section in traditional antenna design process
It is approximate with target frequency bands corresponding to realize multi-band antenna structure, and will design area for the shape in Fragment type Antenna Design region
Packless zonule position is recorded as a string encoding in domain, and the higher-dimension parameter for effectively reducing discrete parameter Antenna Construction Design is empty
Between, avoid random initial antenna design section shape from causing to search for the excessive problem of dimension, to accelerate to find optimal antenna structure
Speed.Therefore, the method for the present invention can significantly improve Fragment type when solving the problems, such as Fragment type Antenna Construction Design
The solution efficiency of Antenna Construction Design problem, especially higher-dimension Antenna Design problem simultaneously obtain performance more preferably antenna structure.
Detailed description of the invention
Fig. 1 is the method flow diagram of the method for the present invention.
Fig. 2 is the embodiment antenna structure model of the method for the present invention and its schematic diagram of design section discretization.
Fig. 3 is the embodiment Antenna Design region design result schematic diagram of the method for the present invention.
Fig. 4 is the return loss schematic diagram of the embodiment design result of the method for the present invention.
Fig. 5 is the embodiment and the existing Fragment type day knot based on binary particle swarm algorithm of the method for the present invention
The efficiency of algorithm convergence curve comparison schematic diagram of structure design method.
Specific embodiment
It is as shown in Figure 1 the method flow diagram of the method for the present invention: this Fragment type multiband day provided by the invention
Cable architecture design method, includes the following steps:
S1. antenna initial model is constructed, while determining design section；
S2. the objective function designed according to Antenna Design demand constructing antennas；
In the specific implementation, objective function is each performance indicator of antenna, including antenna return loss value, gain or stays
Bobbi etc..
S3. design section is discrete for several sub- design sections；
S4. priori knowledge and antenna structure symmetry, the different Fragment type multiband antenna of construction several groups are combined
The structure of design section, and obtain its corresponding coding；Specially use following steps structural texture:
A. design section inscribe slot length L is calculated according to grooving formula；Grooving length is specially calculated using following rule
L:
Situation 1: it is suitable for the case where score line feature is two terminal shortcircuit
Construct half-wave resonator, and the effective length of groovingWherein c is the free space of light
Speed, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p be positive integer and
Value range is [0,5]；
Situation 2: it is suitable for the case where score line feature is one end open circuit, another terminal shortcircuit
Construct quarter-wave resonance device, and the effective length of groovingWherein c is oneself of light
By space velocity, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p is normal
Number and value range are [0,5]；
B. the random initializtion fluting starting point in design section, and start of record position is a1；
C. with position ai-1Centered on, it is randomly selected in given design region and position ai-1Adjacent region records position
It is set to ai, i=2,3 ..., L；
Whether the record position that D. checking procedure C chooses is Chong Die with the position chosen before: giving birth to again if overlapping
At position ai, step C and D are repeated if not being overlapped and continues to generate follow-up location, until L position all generates；
It E. will be with (a of generation1...ai...aL) slotting position generated in symmetrical region is overturn according to symmetry axis；
F. step step B~E is repeated, initialization generates the different Fragment type multiband antenna design section of several groups
Coding；
S5. the corresponding antenna of each day line coding that step S4 is obtained is emulated using Electromagnetic Simulation tool, thus
The response for obtaining the corresponding antenna of each day line coding seeks the corresponding target function value of each antenna, to be owned
The current optimum code of whole of individual；
S6. the step S5 target function value being calculated is judged, to obtain meeting design requirement
Fragment type multi-band antenna structure；
In the specific implementation, specially judged using following rule:
If target function value meets Antenna Design requirement, corresponding to the corresponding individual UVR exposure of target function value
Fragment type multiband antenna is final structure；
If target function value does not meet Antenna Design requirement, repeatedly step S4~S6, until target function value meets day
Line design requirement or duplicate number reach the number being previously set.
Hereinafter, the method for the present invention is further described in conjunction with a specific embodiment:
Antenna modeling:
As shown in Fig. 2, antenna medium plate uses FR-4 material, dielectric constant is antenna modeling i.e. construction initial antenna model
4.4, size is 20mm × 30mm, with a thickness of 1.6mm.Floor is located at the lower section of dielectric-slab, and size is 20mm × 12mm, using 50
Ohm microstrip is fed, width 2.8mm, length 18mm.Patch uses size for the square of 12mm × 12mm
Metal patch.Choose the design section of floor and metal radiation patch as antenna；
Objective function:
The quasi- covering Wi-Fi frequency range of Antenna Design demand, i.e., 2.4 and 5.5GHz construct Fragment type Antenna Construction Design
Objective function it is as follows:
Q (f in formulai) it is frequency fiLocate Fitness analysis value；S11(fi) it is frequency fiThe return loss at place, fiFor 2.35
The frequency of ith sample point in~2.75GHz and 5.20~5.80GHz frequency range, n is the number of sampling points in two frequency ranges；
Respectively by floor and the discrete sub- design section for being 10 × 12 and 12 × 12 of metal patch design section, wherein floor
Design section includes symmetrical subregion；
In conjunction with priori knowledge and antenna structure symmetry, the knot in 10 groups of different Fragment type Antenna Design regions is constructed
Structure；
Calculating design section internal recessing length according to formula is L respectively1≈ 18+p, L2≈ 9+p, it is approximate corresponding respectively
2.4GHz and 5.5GHz, wherein p is the positive integer between 0~5；
Since floor area is symmetrical structure, therefore the coding in left side flooring design region is only generated, the right flooring design area
The coding in domain is generated according to symmetry principle；
Code Design optimization of region:
The random initializtion fluting starting point in design section, and start of record position is a1；
With ai-1Centered on, it is randomly selected in given design region and ai-1Adjacent zonule, record position ai；
Judge aiWhether with the area coincidence selected before；As being overlapped, then a is regeneratedi, otherwise generate ai-1；
B=[b1,b2,...,bL2] generating mode and a=[a1,a2,...,aL1/2] identical；
The optimized variable for generating symmetrical antenna design region encodes c=[c1,c2,...,cL1/2]；
It repeats the above steps, initialization generates 10 groups of Fragment type Antenna Design regional codes；
It calls Electromagnetic Simulation tool to obtain the response of day line coding, solves objective function using its response, obtain institute
There is the current optimum code of the overall situation of individual；
The target function value being calculated is judged:
If target function value meets Antenna Design requirement, corresponding to the corresponding individual UVR exposure of target function value
Fragment type multiband antenna is final structure；
If target function value does not meet Antenna Design requirement, repeat the above steps, until target function value meets antenna
Design requirement or duplicate number reach the number (20 times) being previously set.
The patch shape obtained using the method for the invention and its return loss plot difference are as shown in Figures 3 and 4, and antenna exists
Return loss value in two frequency ranges of 2.35~3.4GHz and 5.05~5.85GHz is respectively less than -10dB, meets Antenna Design performance
Demand.
Furthermore it is utilized respectively the Fragment type antenna structure design method based on priori knowledge and is based on binary system particle
Fragment type antenna structure design method (J.Dong, Q.Li and L.Deng.Design of Fragment- of group's algorithm
Type Antenna Structure Using an Improved BPSO.IEEE Transactions on Antennas
And Propagation, 2018,66 (2): 564-571.) Fragment type Antenna Construction Design is carried out, compare its design knot
Fruit calculates cost and is relatively listed in table 1, and convergence curve is as shown in Figure 5.
The calculating cost of 12 kinds of antenna design methods of table compares schematic table
| Design method | Simulation times | Total time-consuming/s |
| Based on binary system population | 200 | 14318.26 |
| Based on priori knowledge | 63 | 4180.67 |
Compared to the Fragment type antenna structure design method based on binary particle swarm algorithm, base proposed by the present invention
It can be found in the Fragment type antenna structure design method of priori knowledge with faster convergence rate and meet design requirement
Antenna structure.
Claims (8)
1. a kind of Fragment type multi-band antenna structure design method, includes the following steps:
S1. antenna initial model is constructed, while determining design section；
S2. the objective function designed according to Antenna Design demand constructing antennas；
S3. design section is discrete for several sub- design sections；
S4. the structure of the different Fragment type multiband antenna design section of construction several groups, and obtain its corresponding coding；
S5. the response of the corresponding antenna of each day line coding of obtaining step S4 construction, seeks the corresponding target of each antenna
Functional value, to obtain the current optimum code of whole of all individuals；
S6. the step S5 target function value being calculated is judged, to obtain the Fragment type for meeting design requirement
Multi-band antenna structure.
2. Fragment type multi-band antenna structure design method according to claim 1, it is characterised in that step S2 institute
The objective function stated is each performance indicator of antenna, including antenna return loss value, gain and standing-wave ratio.
3. Fragment type multi-band antenna structure design method according to claim 1, it is characterised in that step S4 institute
The structure of the different Fragment type multiband antenna design section of the construction several groups stated specially combines priori knowledge and day
Cable architecture symmetry constructs the structure of the different Fragment type multiband antenna design section of several groups.
4. Fragment type multi-band antenna structure design method according to claim 3, it is characterised in that the structure
The structure of the different Fragment type multiband antenna design section of several groups is made, following steps structural texture is specially used:
A. design section inscribe slot length L is calculated according to grooving formula；
B. the random initializtion fluting starting point in design section, and start of record position is a1；
C. with position ai-1Centered on, it is randomly selected in given design region and position ai-1Adjacent region, record position are
ai, i=1,2 ..., L；
Whether the record position that D. checking procedure C chooses is Chong Die with the position chosen before: regenerating position if overlapping
Set ai, step C and D are repeated if not being overlapped and continues to generate follow-up location, until L position all generates；
It E. will be with (a of generation1...ai...aL) slotting position generated in symmetrical region is overturn according to symmetry axis；
F. step step B~E is repeated, initialization generates the volume of the different Fragment type multiband antenna design section of several groups
Code.
5. Fragment type multi-band antenna structure design method according to claim 4, it is characterised in that described in step A
Design section inscribe slot length L is calculated according to grooving formula, grooving length L is specially calculated using following rule:
Situation 1: it is suitable for the case where score line feature is two terminal shortcircuit
Construct half-wave resonator, and the effective length of groovingWherein c is the free space speed of light
Degree, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p is constant and value
Range is [0,5]；
Situation 2: it is suitable for the case where score line feature is one end open circuit, another terminal shortcircuit
Construct quarter-wave resonance device, and the effective length of groovingWherein c is the freely empty of light
Between speed, f0For resonance frequency, εeFor medium substrate dielectric constant andεrFor relative constant, p be constant and
Value range is [0,5].
6. Fragment type multi-band antenna structure design method according to claim 1, it is characterised in that step S5 institute
The response of the corresponding antenna of each day line coding for the obtaining step S4 construction stated, specially using Electromagnetic Simulation tool to each
The corresponding antenna of a day line coding is emulated, to obtain the response of the corresponding antenna of each day line coding.
7. Fragment type multi-band antenna structure design method according to claim 1, it is characterised in that step S5 institute
The current optimum code of whole for obtaining all individuals stated specially obtains corresponding when objective function is optimal in all individuals
Individual UVR exposure.
8. Fragment type multi-band antenna structure design method according to claim 1, it is characterised in that step S6 institute
The target function value that step S5 is calculated stated judges, is specially judged using following rule:
If target function value meets Antenna Design requirement, Fragment type corresponding to the corresponding individual UVR exposure of target function value
Multiband antenna is final structure；
If target function value does not meet Antenna Design requirement, repeatedly step S4~S6, until target function value meets antenna and sets
Meter requires or duplicate number reaches the number being previously set.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088343A1 (en) * | 2003-10-22 | 2005-04-28 | Ji-Hoon Bae | Method for designing multiband antenna using genetic algorithm device linked to full electromagnetic wave analyzing device |
| CN105224743A (en) * | 2015-09-29 | 2016-01-06 | 北京航空航天大学 | A kind of based on the antenna arrangement's optimization on the full frequency band of particle cluster algorithm |
| CN106021825A (en) * | 2016-07-07 | 2016-10-12 | 中南大学 | Fragment type antenna structure design method based on binary particle swarm algorithm |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088343A1 (en) * | 2003-10-22 | 2005-04-28 | Ji-Hoon Bae | Method for designing multiband antenna using genetic algorithm device linked to full electromagnetic wave analyzing device |
| CN105224743A (en) * | 2015-09-29 | 2016-01-06 | 北京航空航天大学 | A kind of based on the antenna arrangement's optimization on the full frequency band of particle cluster algorithm |
| CN106021825A (en) * | 2016-07-07 | 2016-10-12 | 中南大学 | Fragment type antenna structure design method based on binary particle swarm algorithm |
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