CN103337709A - A tunable all dielectric isotropy phase controller and a phase control method - Google Patents
A tunable all dielectric isotropy phase controller and a phase control method Download PDFInfo
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- CN103337709A CN103337709A CN2013102214439A CN201310221443A CN103337709A CN 103337709 A CN103337709 A CN 103337709A CN 2013102214439 A CN2013102214439 A CN 2013102214439A CN 201310221443 A CN201310221443 A CN 201310221443A CN 103337709 A CN103337709 A CN 103337709A
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Abstract
Provided is a tunable all dielectric isotropy phase controller and a phase control method which belongs to the technical field of electromagnetic wave control. The phase controller is composed of a substrate, medium particles, and a temperature control device. The substrate is processed to be provided with orifices which are in a periodic circular array configuration or in an oval array configuration. The medium particles are arranged in the small holes. The substrate and the medium particles are arranged in the temperature control device. The phase controller enables an effective dielectric constant or an effective magnetic permeability in a specific frequency range to be zero, so that control of a phase which emits electromagnetic waves is realized, and the phase controller is provided with isotropy electromagnetic response characteristics. Control of electromagnetic phases in different frequency ranges is realized by utilizing the sensitive response characteristics of the medium particles and through the temperature control apparatus which adjusts temperatures. The tunable all dielectric isotropy phase controller and the phase control method of the invention are very significant for the control of electromagnetic wave phases and camouflaging of wave source positions, and can be widely applied to the field of electromagnetic wave control.
Description
Technical field
The present invention relates to a kind of electromagnetic wave phase controller, belong to electromagnetic wave control technology field.
Background technology
The target that realization is followed one's bent and accurately effective control is human pursuit always to electromagnetic wave propagation.For a long time, people utilize the medium of the physical characteristic with homogeneous to make optical lens, have realized visible light is propagated the control in path.Certainly its effect is not fully desirable, and it is subjected to the restriction of medium character homogeneity, can't effectively control electromagnetic phase place.In recent years, the development of super material (Metamaterials) makes people can realize the non-existent unusual electromagnetic property of nature, wherein the super material of zero refraction has shown its outstanding effect at aspects such as phase control, wave-shapings, is forward position and hot issue in the current research field.The super material of zero refraction can make the electromagnetic wave of propagating therein that zero refraction effect takes place at the medium interface place, thereby using the radio magnetic wave propagates along the normal direction at interface, this is significant for the directivity of having improved antenna and wave source, modulated electromagnetic wave phase place etc., can be widely used in electromagnetic wave control field.
The research of relevant zero refraction effect at present mainly concentrates on anisotropy zero refraction effect, and its electromagnetic parameter is 0 in a certain direction, and is 1 in two other direction of quadrature.This makes the phase place in its uncontrollable medium, and anisotropic electromagnetic property can make it be subjected to bigger restriction in application.For the anisotropy that has realized under study for action zero refraction effect, the metal structure unit is the basic structural unit that constitutes super material in addition.Metal has bigger ohmic loss, and this can reduce its measurability greatly at visible light frequency band; And its structure of metal structure unit is in case determine that the frequency range that zero refraction effect produces is also determined, thereby do not had tunability thereupon.As seen, the super material of anisotropy that is constituted by the metal structure unit and be not suitable for constructing phase controller.Therefore, design the isotropic phase controller of a kind of tunable full medium and just seem particularly important.
Summary of the invention
The objective of the invention is to utilize the resonance effect of media particle to realize that effective dielectric constant or effective permeability are zero, thereby realize the control to the electromagnetic wave phase place; Utilize the media particle dielectric constant to the sensitive response characteristic of temperature, regulate temperature by attemperating unit, thereby realize the control of the electromagnetic wave phase place of different frequency range.
Technical scheme of the present invention is as follows:
A kind of tunable full medium isotropic phase level controller, it is characterized in that: this phase controller is made up of substrate, media particle and attemperating unit; Be processed with the aperture that periodically circular array is arranged or oval-shaped array is arranged on the substrate, media particle places aperture; Substrate and media particle are positioned in the attemperating unit.
Tunable full medium isotropic phase level controller of the present invention, be further characterized in that: described media particle is the ceramic dielectric particle, and the micro-wave dielectric constant in the time of 25 ℃ is 195～750, and its cube medium block or diameter that is shaped as the length of side 0.5～3.0mm is the medium ball of 0.5～3.0mm.
Tunable full medium isotropic phase control method of the present invention is characterized in that this method may further comprise the steps:
1) utilizing the grinding cutting technique is the medium ball of 0.5～3.0mm with cube medium block or the diameter that ceramic cylinder is processed into the length of side 0.5～3.0mm;
2) utilize the numerical controlled carving technology to process substrate, and process the aperture that periodically circular array is arranged or oval-shaped array is arranged at substrate, the size of aperture and the size of media particle are complementary;
3) filled media particle one by one in aperture, and substrate and media particle be positioned in the attemperating unit, utilize the resonance effect of media particle to realize that effective dielectric constant or effective permeability are zero, realize the control to the electromagnetic wave phase place; Regulate temperature by attemperating unit, utilize the media particle dielectric constant to the sensitive response characteristic of temperature, realize the control of the electromagnetic wave phase place of different frequency range.
The present invention has the following advantages and the high-lighting effect: the present invention utilizes the resonance effect of media particle to realize that effective dielectric constant or effective permeability are zero, thereby has realized the control to the electromagnetic wave phase place; Utilize the media particle dielectric constant to the sensitive response characteristic of temperature, regulate temperature by attemperating unit, thereby realized the control of the electromagnetic wave phase place of different frequency range.The invention provides a kind of tunable full medium isotropic phase level controller and phase control method, realized super material in the development of application, and will be applied to the research directions such as camouflage of electromagnetic wave phase control, wave source position.
Description of drawings
Fig. 1 is tunable full medium isotropic phase level controller schematic diagram.
Fig. 2 is the effective refractive index dispersion curve (media particle dielectric constant be 121, the media particle length of side be 1.84mm, intergranular space be about 2mm) of phase controller under different temperatures.
Fig. 3 is circular phase controller control effect schematic diagram.
Fig. 4 is oval phase controller control effect schematic diagram.
Fig. 5 is phase controller test design sketch (inoperative frequency range).
Fig. 6 is phase controller test design sketch (working frequency range).
Among the figure: the 1-media particle; The 2-substrate; The 3-aperture; The 4-attemperating unit; 5-utmost point sub antenna; 6-electromagnetic wave equiphase surface.
Embodiment
Fig. 1 is tunable full medium isotropic phase level controller schematic diagram provided by the invention, and this phase controller is made up of substrate 2, media particle 1 and attemperating unit 4.Be processed with the aperture 3 that periodically circular array is arranged or oval-shaped array is arranged on the substrate 2, media particle 1 places aperture 3; Substrate 2 and media particle 1 are positioned in the attemperating unit 4.The resonance effect of media particle of utilizing this phase controller has realized that effective dielectric constant or effective permeability are zero, thereby has realized the control to the electromagnetic wave phase place; Utilize the media particle dielectric constant to the sensitive response characteristic of temperature, regulate temperature by attemperating unit, thereby realized the control of the electromagnetic wave phase place of different frequency range.
Described media particle is the ceramic dielectric particle, and the micro-wave dielectric constant in the time of 25 ℃ is 195～750, and its cube medium block or diameter that is shaped as the length of side 0.5～3.0mm is the medium ball of 0.5～3.0mm.
Working mechanism of the present invention is as follows:
The present invention is a kind of tunable full medium isotropic phase level controller, its core at first is to utilize the electromagnetic resonance of media particle to realize isotropism zero dielectric constant and zero magnetic permeability of different frequency range, and arrange by the geometric array of particle and to realize control to outgoing electromagnetic wave phase place, secondly be to utilize the variation characteristic of media particle dielectric constant with temperature to realize the temperature adjustable of phase controller working frequency range.
Refractive index n is the function of DIELECTRIC CONSTANT and magnetic permeability μ, namely
When dielectric constant and magnetic permeability have one to be zero, effective refractive index will occur and equal zero.Utilize electromagnetic scattering characteristic and the active medium theory of high dielectric constant particle, by selecting suitable media particle parameter (size in the size of particle, dielectric constant, particle gap etc.) just can realize that effective permeability or effective dielectric constant are zero in a certain frequency range, the electromagnetic wave outgoing in the medium will be perpendicular to dielectric surface at this moment.Arrange by the geometry to array of particles, just can control the shape of outgoing electromagnetic wave equiphase surface, thereby realize the control to the electromagnetic wave phase place.
Fig. 2 is the effective refractive index dispersion curve (media particle dielectric constant be 121, the media particle length of side be 1.84mm, intergranular space be about 2mm) of phase controller under different temperatures.The variation of the dielectric constant with temperature of media particle and changing.Therefore can change temperature by attemperating unit regulates its dielectric property, and then realizes the control of the electromagnetic wave phase place of different frequency range.
Fig. 3 is circular phase controller control effect schematic diagram.At first utilize the grinding cutting technique that ceramic cylinder is processed as media particle 1; Utilize the numerical controlled carving technology to process substrate 2 subsequently, and process the aperture 3 that the periodicity circular array is arranged at substrate 2, the size of the size of aperture 3 and media particle 1 is complementary; Filled media particle 1 one by one in the aperture 3 of substrate 2, and substrate 2 and media particle 1 be positioned in the attemperating unit 4, the circular phase controller of tunable full medium isotropism obtained.In the real work, utmost point sub antenna 5 is positioned over optional position in the phase controller, the electromagnetic wave equiphase surface 6 of its emission for a series of be the concentric circles in the center of circle with utmost point sub antenna 5; After having passed through the circular array that media particle 1 constitutes, the center of circle that electromagnetic wave equiphase surface 6 becomes a series of circular array that constituted with media particle 1 is the concentric circles in the center of circle, has namely realized the control effect to electromagnetic wave equiphase surface 6.
Fig. 4 is oval phase controller control effect schematic diagram.At first utilize the grinding cutting technique that ceramic cylinder is processed as media particle 1; Utilize the numerical controlled carving technology to process substrate 2 subsequently, and process the aperture 3 that the periodicity oval-shaped array is arranged at substrate 2, the size of the size of aperture 3 and media particle 1 is complementary; Filled media particle 1 one by one in the aperture 3 of substrate 2, and substrate 2 and media particle 1 be positioned in the attemperating unit 4, the oval phase controller of tunable full medium isotropism obtained.In the real work, utmost point sub antenna 5 is positioned over optional position in the phase controller, the electromagnetic wave equiphase surface 6 of its emission for a series of be the concentric circles in the center of circle with utmost point sub antenna 5; After having passed through the oval-shaped array that media particle 1 constitutes, electromagnetic wave equiphase surface 6 becomes a series of concentration ellipses, and the center of the oval-shaped array that its center and media particle 1 constitute coincides.Namely realized the control effect to electromagnetic wave equiphase surface 6.
Implementation procedure of the present invention and effect are further specified by embodiment and accompanying drawing:
Embodiment:
At first utilize the grinding cutting technique that ceramic cylinder is processed as media particle 1, it is shaped as the medium cubic block, and the length of side is 1.84mm.The material of media particle 1 is the strontium carbonate titanate ceramics that magnesium oxide mixes, and its micro-wave dielectric constant in the time of 25 ℃ is about 121.Utilize the numerical controlled carving technology to process substrate 2 subsequently, the material of substrate 2 is polytetrafluoroethylene, and its thickness is 3mm.And process the aperture 3 that circular array is periodically arranged at substrate 2, and aperture 3 is the square opening of degree of depth 2mm, and it is of a size of 2mm * 2mm, and aperture 3 gap each other is about 0.8mm, and the circular array diameter that aperture 3 constitutes is 60mm.Filled media particle 1 one by one in the aperture 3 of substrate 2, and substrate 2 and media particle 1 be positioned in the attemperating unit 4, tunable full medium isotropic phase level controller obtained.For verifying the control effect of this phase controller, utmost point sub antenna 5 is positioned over optional position in the phase controller, its electromagnetic field distribution tests effect such as Fig. 5, shown in Figure 6.As seen from Figure 5, when wave frequency when inoperative frequency range (f=9.99GHz), the electromagnetic wave equiphase surface 6 of its outgoing for a series of be the concentric circles in the center of circle with utmost point sub antenna 5, phase controller is not brought into play control action; As seen from Figure 6, when the electromagnetic wave frequency range when working frequency range (f=12.10GHz), after having passed through the circular array that media particle 1 constitutes, the center of circle that electromagnetic wave equiphase surface 6 becomes a series of circular array that constituted with media particle 1 is the concentric circles in the center of circle, proves that this phase controller realized the control effect to electromagnetic wave equiphase surface 6.
Claims (3)
1. tunable full medium isotropic phase level controller, it is characterized in that: this phase controller is made up of substrate (2), media particle (1) and attemperating unit (4); Be processed with the aperture (3) that periodically circular array is arranged or oval-shaped array is arranged on the substrate (2), media particle (1) places aperture (3); Substrate (2) and media particle (1) are positioned in the attemperating unit (4).
2. according to the described tunable full medium isotropic phase of claim 1 level controller, it is characterized in that: described media particle (1) is the ceramic dielectric particle, and the micro-wave dielectric constant in the time of 25 ℃ is 195～750, and its cube medium block or diameter that is shaped as the length of side 0.5～3.0mm is the medium ball of 0.5～3.0mm.
3. tunable full medium isotropic phase control method is characterized in that this method may further comprise the steps:
1) utilizing the grinding cutting technique is the medium ball of 0.5～3.0mm with cube medium block or the diameter that ceramic cylinder is processed into the length of side 0.5～3.0mm;
2) utilize the numerical controlled carving technology to process substrate (2), and process the aperture (3) that periodically circular array is arranged or oval-shaped array is arranged at substrate (2), the size of the size of aperture (3) and media particle (1) is complementary;
3) filled media particle (1) one by one in aperture (3), and substrate (2) and media particle (1) be positioned in the attemperating unit (4), utilize the resonance effect of media particle to realize that effective dielectric constant or effective permeability are zero, realize the control to the electromagnetic wave phase place; Regulate temperature by attemperating unit (4), utilize the media particle dielectric constant to the sensitive response characteristic of temperature, realize the control of the electromagnetic wave phase place of different frequency range.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684570A (en) * | 2016-12-20 | 2017-05-17 | 清华大学 | Tunable all-dielectric unidirectional electromagnetic wave stealth device |
| CN106972278A (en) * | 2017-03-16 | 2017-07-21 | 浙江大学 | A kind of electromagnetism stealth material of the scattering particles of all dielectric zero and its composition |
| CN107046179A (en) * | 2016-09-18 | 2017-08-15 | 北京邮电大学 | A kind of super surface of adjustable dielectric |
| CN107834207A (en) * | 2017-11-28 | 2018-03-23 | 电子科技大学 | A kind of mercuri temperature-tunable electromagnetism Meta Materials and manufacture method |
| CN111799562A (en) * | 2020-06-22 | 2020-10-20 | 清华大学 | Tunable full-dielectric gradient magnetic conductivity two-dimensional omnidirectional stealth device and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707537A (en) * | 2012-07-10 | 2012-10-03 | 大连理工大学 | Tunable metamaterial absorber based on phase-change materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102707537A (en) * | 2012-07-10 | 2012-10-03 | 大连理工大学 | Tunable metamaterial absorber based on phase-change materials |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046179A (en) * | 2016-09-18 | 2017-08-15 | 北京邮电大学 | A kind of super surface of adjustable dielectric |
| CN106684570A (en) * | 2016-12-20 | 2017-05-17 | 清华大学 | Tunable all-dielectric unidirectional electromagnetic wave stealth device |
| CN106684570B (en) * | 2016-12-20 | 2019-11-22 | 清华大学 | The unidirectional electromagnetic wave stealth device of tunable full medium |
| CN106972278A (en) * | 2017-03-16 | 2017-07-21 | 浙江大学 | A kind of electromagnetism stealth material of the scattering particles of all dielectric zero and its composition |
| CN107834207A (en) * | 2017-11-28 | 2018-03-23 | 电子科技大学 | A kind of mercuri temperature-tunable electromagnetism Meta Materials and manufacture method |
| CN111799562A (en) * | 2020-06-22 | 2020-10-20 | 清华大学 | Tunable full-dielectric gradient magnetic conductivity two-dimensional omnidirectional stealth device and manufacturing method thereof |
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