CN108183342A - A kind of tunable microstrip antenna and its design method based on periodical metamaterial structure - Google Patents
A kind of tunable microstrip antenna and its design method based on periodical metamaterial structure Download PDFInfo
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- CN108183342A CN108183342A CN201711415658.9A CN201711415658A CN108183342A CN 108183342 A CN108183342 A CN 108183342A CN 201711415658 A CN201711415658 A CN 201711415658A CN 108183342 A CN108183342 A CN 108183342A
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- antenna
- microstrip antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
Abstract
A kind of tunable microstrip antenna and its design method based on metamaterial structure.The antenna is the coating that two layers of periodical opening resonance loop structure is loaded in the top of conventional microstrip antenna as antenna, adds bst thin film material between the radiation patch of microstrip antenna and dielectric-slab and is made.The design includes：(1) a common microstrip antenna is designed first；(2) it using double-deck periodical opening resonance loop structure as the coating of antenna, loads on above conventional microstrip antenna, every layer of resonant ring quantity is 5*5.(3) in the case where not changing antenna self structure, bst thin film material is added between the radiation patch of microstrip antenna and dielectric-slab, the dielectric constant of bst thin film material is controlled by voltage, so as to change the resonant frequency of antenna.
Description
Technical field
The invention belongs to radio arts, and in particular to a kind of tunable microstrip antenna based on periodical metamaterial structure
Design.
Background technology
Radio Frequency Identification Technology be one kind by wireless communication mode into row data communication, so as to fulfill the skill of target identification
Art, wherein antenna play highly important effect.The pith that antenna emits and receives as RFID system, performance are straight
The communication quality for the system of influencing is connect, nowadays traditional antenna has been difficult to meet the needs of modern communications.Meta Materials, which are used as, works as
The hot spot of preceding research, the performance of antenna can be improved by being applied to antenna, contribute to the optimization of antenna.
Meta Materials are the artificial cycle structures being not present in a kind of nature, with special electromagnetic property.Meta Materials
It is negative or both of which is negative material that generally referred to as dielectric constant, which is negative either magnetic conductivity, and Super-material antenna is than general day
The performance of line will be got well, and can greatly improve antenna performance after general antenna loading Meta Materials, antenna is made preferably to be optimized.
Tunable antenna can obtain different resonant frequencies, this side in the case where not changing antenna structure and size
Formula is chiefly used in multifunction system, can reduce the cost of system, mitigates weight, and be conducive to the electromagnetic compatibility of system.Due near
Have the research of ferroelectric thin-flim materials compared with much progress over year, ferroelectric thin-flim materials is applied to antenna, using its piezoelectric property, is changed
Become its dielectric constant, the resonant frequency of antenna is controlled with this, so as to fulfill the adjustable of antenna resonant frequency.
Invention content
The present invention seeks to low, the narrow bandwidth that solves the gain of microstrip antenna in itself in the prior art, frequency is non-adjustable etc. asks
Topic, proposes a kind of tunable microstrip antenna designs method based on periodical metamaterial structure, which has high gain, direction
The advantages that property is good, tunable.
A tunable microstrip antenna based on metamaterial structure of the present invention, including a common micro-strip day
Line, the centre frequency of the common microstrip antenna is 2.45GHz, and feeding classification uses coaxial feed, antenna size 56mm*
74mm, thickness 1.6mm, dielectric board material use FR4_epoxy, and radiation patch size is 37mm*28mm；Described common micro-
Top with antenna loads the coating of two layers of periodical split ring resonator array structure, and every layer of split ring resonator quantity is 5*
5；Bst thin film material is added between the radiation patch of microstrip antenna and dielectric-slab.
Between the Meta Materials coating and conventional microstrip antenna and the distance between two layers coating is 5mm.
The design process of tunable microstrip antenna of the present invention based on metamaterial structure includes：
(1) a common microstrip antenna, centre frequency 2.45GHz, feed side are designed using HFSS simulation softwares
Formula uses coaxial feed, antenna size 56mm*74mm, thickness 1.6mm, and dielectric board material uses FR4_epoxy, and radiation patch is big
Small is 37mm*28mm.
(2) individual layer periodicity resonance ring structure is added above the microstrip antenna at 5mm, resonant ring quantity is 5*5, and emulation is seen
Examine return loss, the directional diagram of antenna.
(3) change periodical resonant ring structure level number, i.e., 5mm and 10mm places one layer of week of addition respectively above microstrip antenna
Phase property resonance ring structure, every layer of resonant ring quantity are 5*5, the return loss of controlled observation antenna, directional diagram.
(4) on the basis of (3), double-deck periodical the distance between resonant ring and microstrip antenna, controlled observation day are adjusted
The return loss of line, directional diagram.
(5) in the case where not changing conventional microstrip antenna self structure, radiation patch and Jie in conventional microstrip antenna
Bst thin film material is added between scutum, the dielectric constant of bst thin film material is controlled by voltage, changes conventional microstrip antenna
Resonant frequency.
By more than structure tunable microstrip antenna simulation result and do not load the antenna of metamaterial structure before and compare,
By comparing return loss, directional diagram and the gain of three, the parameter that performance is best is taken.By adjusting microstrip antenna and Meta Materials
The distance between structure changes the Meta Materials number of plies, realizes and the antenna for loading Meta Materials is optimized.
The advantages and positive effects of the present invention：
1st, antenna of the present invention, using the performance of resonant ring structural improvement microstrip antenna, antenna radiation pattern enhancing.Add
When carrying individual layer and double-deck Meta Materials, compared compared with no Meta Materials loaded antenna, at 2.45GHz, antenna gain increases respectively
2.5dbi and 4dBi.
2nd, antenna of the present invention controls the dielectric constant of bst thin film material by voltage, so as to change the humorous of antenna
It is wide that frequency range can be read in vibration frequency.
3rd, antenna of the present invention, the rapidoprint used is common, simple for process, is easy to implement volume industrial metaplasia
Production.
Description of the drawings
Fig. 1 is 2.45GHz microstrip antenna models.
Fig. 2 is the return loss of designed microstrip antenna.
Fig. 3 is the directional diagram of designed microstrip antenna.
Fig. 4 is the microstrip antenna for loading individual layer periodicity metamaterial structure.
Fig. 5 is the microstrip antenna of the double-deck periodical metamaterial structure of loading.
Fig. 6 is the simulation architecture of two kinds of structures of Fig. 4 and Fig. 5 and does not load the antenna of metamaterial structure before to compare to obtain
Return loss plot.
Fig. 7 is the simulation architecture of two kinds of structures of Fig. 4 and Fig. 5 and does not load the antenna of metamaterial structure before to compare to obtain
Directional diagram.
Fig. 8 is the simulation architecture of two kinds of structures of Fig. 4 and Fig. 5 and does not load the antenna of metamaterial structure before to compare to obtain
Gain diagram.
Fig. 9 is the antenna model for being added to bst thin film.
Figure 10 is the bst thin film material simulation result comparison diagram of different relative dielectric constants.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with the accompanying drawings further
Detailed description.
Embodiment 1,
As shown in figure 4, the tunable microstrip antenna based on metamaterial structure, the tunable microstrip antenna includes one
Common microstrip antenna (referring to Fig. 1), the centre frequency of the microstrip antenna are 2.45GHz, size 56mm*74mm, thickness
For 1.6mm, dielectric board material uses FR4_epoxy, and radiation patch size is 37mm*28mm, and feeding classification uses coaxial feed.
The coating of one layer of periodical split ring resonator array structure, opening are loaded at the top 5mm of the conventional microstrip antenna
Resonant ring quantity is 5*5.
Embodiment 2,
On the basis of the microstrip antenna designed by embodiment 1, increase by one layer of coating, i.e., in the conventional microstrip day
Load the coating of one layer (two layers totally) periodical split ring resonator array structure at the top 5mm and 10mm of line respectively, every layer
Split ring resonator quantity is 5*5.
Embodiment 3
On the basis of the microstrip antenna designed by embodiment 1 or embodiment 2, do not changing conventional microstrip antenna itself knot
In the case of structure, bst thin film material is added between the radiation patch of microstrip antenna and dielectric-slab, controls BST thin by voltage
The dielectric constant of membrane material, so as to change the resonant frequency of conventional microstrip antenna.
Comparison of experiment results
Fig. 1 shows 2.45GHz conventional microstrip antenna models.
As shown in Figure 1, establish a conventional microstrip antenna using HFSS simulation softwares.Center of antenna frequency is 2.45GHz,
Feeding classification uses coaxial feed, antenna size 56mm*74mm, thickness 1.6mm, and dielectric board material uses FR4_epoxy, radiation
Patch size is 37mm*28mm.
Fig. 2 and Fig. 3 respectively illustrates return loss and the direction of the designed microstrip antenna for not loading metamaterial structure
Figure.
As shown in Fig. 2, microstrip antenna-three dB bandwidth is 2.4GHz-2.6GHz, the return loss at resonance point 2.45GHz
For -26dB.As shown in figure 3, the radiation of microstrip antenna is more dispersed in YOZ faces and XOZ faces, directionality is not good enough.
The microstrip antenna of loading individual layer periodicity metamaterial structure that the embodiment 1 that Fig. 4 shows designs.
As shown in figure 4, the periodical resonance ring structure of addition, the quantity of resonant ring are at 5mm above the microstrip antenna of Fig. 1
5*5 observes the variation of parameters by emulation.
The antenna that embodiment 2 as shown in Figure 5 designs, the 5mm and 10mm punishment Bie Gejia above the conventional microstrip antenna of Fig. 1
One layer of periodical metamaterial structure is carried, the quantity of resonant ring is 5*5.
Fig. 6 shows the simulation result of two kinds of structures of Fig. 4 and Fig. 5 and does not load the microstrip antenna work of metamaterial structure before
Compare obtained return loss plot.As can be seen that antenna makes moderate progress in the return loss of resonance point.
Fig. 7 shows the simulation architecture of two kinds of structures of Fig. 4 and Fig. 5 and does not load the microstrip antenna work of metamaterial structure before
Compare obtained directional diagram.As shown in fig. 7, antenna radiation pattern is restrained, main lobe width becomes smaller, directionality enhancing, and Meta Materials
The number of plies its is increased more apparent when increasing.
Fig. 8 shows the simulation architecture of two kinds of structures of Fig. 4 and Fig. 5 and does not load the antenna of metamaterial structure before and compares
Obtained gain diagram.As shown in figure 8, when loading individual layer and double-deck Meta Materials, compared compared with no Meta Materials loaded antenna,
At 2.45GHz, antenna gain increases 2.5dbi and 4dBi respectively.The promotion of gain increases as the Meta Materials number of plies increases.
Realize the adjustable of antenna resonant frequency, the present invention is not changing antenna self structure using ferroelectric thin-film technology
In the case of, bst thin film material is added between the radiation patch of microstrip antenna and dielectric-slab, bst thin film is controlled by voltage
The dielectric constant of material, the resonant frequency to make antenna are changed.
Fig. 9 shows the antenna model for being added to bst thin film.A layer thickness has been added to be between antenna patch and dielectric-slab
The material of 0.01mm.The dielectric-slab of antenna becomes double-layer structure, by changing the dielectric constant on its upper strata, by bst thin film material
The relative dielectric constant of material is set as 100,200,300, is emulated.
Figure 10 shows the bst thin film material simulation result comparison with different relative dielectric constants.As shown in Figure 10, exist
During the dielectric constant of bst thin film becomes larger, the resonant frequency of the antenna is becoming smaller, but its return loss is becoming
Greatly, so the antenna can realize the adjustable of resonant frequency.
In conclusion the present invention designs a tunable microstrip antenna using periodical metamaterial structure and ferroelectric thin film.
Microstrip antenna is widely used general, and the present invention using Meta Materials improves its performance, improves the gain of antenna, and improve day
The directionality of line, comparison loading multilayer metamaterial structure, the performance of antenna can advanced optimize.And in the base of Super-material antenna
Ferroelectric thin-flim materials is added on plinth, realizes the resonant-frequency adjustable of antenna.
Claims (3)
1. a kind of tunable microstrip antenna based on metamaterial structure, which is characterized in that the tunable microstrip antenna includes
One common microstrip antenna, the centre frequency of the antenna is 2.45GHz, size 56mm*74mm, thickness 1.6mm, is situated between
Scutum material uses FR4_epoxy, and radiation patch size is 37mm*28mm, and feeding classification uses coaxial feed；Described general
The top of logical microstrip antenna loads the coating of two layers of periodical split ring resonator array structure, and every layer of split ring resonator quantity is equal
For 5*5；Bst thin film material is added between the radiation patch of microstrip antenna and dielectric-slab.
2. the tunable microstrip antenna according to claim 1 based on metamaterial structure, which is characterized in that the super material
Expect between coating and conventional microstrip antenna and the distance between two layers coating is 5mm.
A kind of 3. tunable microstrip antenna designs method described in claim 1 based on metamaterial structure, which is characterized in that should
Design method includes the following steps：(1) a common microstrip antenna is designed first, the centre frequency of antenna is 2.45GHz, ruler
Very little is 56mm*74mm, and thickness 1.6mm, for dielectric board material using FR4_epoxy, radiation patch size is 37mm*28mm, is presented
Electric mode uses coaxial feed；(2) it using periodical split ring resonator array structure as the coating of antenna, loads on common micro-
Top with antenna covers the number of plies and the distance between coating and microstrip antenna by change, antenna performance is optimized；
Every layer of periodical split ring resonator quantity is 5*5；(3) in the case where not changing conventional microstrip antenna self structure, general
Bst thin film material is added between the radiation patch and dielectric-slab of logical microstrip antenna, the dielectric of bst thin film material is controlled by voltage
Constant, so as to change the resonant frequency of conventional microstrip antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711415658.9A CN108183342A (en) | 2017-12-25 | 2017-12-25 | A kind of tunable microstrip antenna and its design method based on periodical metamaterial structure |
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| CN201711415658.9A CN108183342A (en) | 2017-12-25 | 2017-12-25 | A kind of tunable microstrip antenna and its design method based on periodical metamaterial structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586023A (en) * | 2019-01-07 | 2019-04-05 | 云南大学 | Rectangular microstrip antenna based on Metamaterial dielectric substrate |
| CN110085999A (en) * | 2019-04-24 | 2019-08-02 | 四川大学 | Meta Materials microstrip antenna system |
| CN110187338A (en) * | 2019-05-07 | 2019-08-30 | 同济大学 | A kind of broadband transmission matching layer structure |
| CN110880642A (en) * | 2019-11-29 | 2020-03-13 | 深圳先进技术研究院 | Near-zero refractive index metamaterial antenna |
| CN113258256A (en) * | 2020-01-28 | 2021-08-13 | 弗劳恩霍夫应用研究促进协会 | Antenna module |
| CN113517558A (en) * | 2021-03-24 | 2021-10-19 | 西安电子科技大学 | High-isolation 5G base station antenna and wireless communication terminal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586023A (en) * | 2019-01-07 | 2019-04-05 | 云南大学 | Rectangular microstrip antenna based on Metamaterial dielectric substrate |
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| CN110187338A (en) * | 2019-05-07 | 2019-08-30 | 同济大学 | A kind of broadband transmission matching layer structure |
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| CN110880642B (en) * | 2019-11-29 | 2021-10-01 | 深圳先进技术研究院 | Near-zero refractive index metamaterial antenna |
| CN113258256A (en) * | 2020-01-28 | 2021-08-13 | 弗劳恩霍夫应用研究促进协会 | Antenna module |
| CN113517558A (en) * | 2021-03-24 | 2021-10-19 | 西安电子科技大学 | High-isolation 5G base station antenna and wireless communication terminal |
| CN113517558B (en) * | 2021-03-24 | 2022-08-16 | 西安电子科技大学 | High-isolation 5G base station antenna and wireless communication terminal |
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