CN114709626B - Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on super surface - Google Patents
Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on super surface Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
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- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers
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- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention belongs to the field of vortex electromagnetic wave antennas, and particularly provides a Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on a super surface, which is used for solving the problems of low gain of vortex electromagnetic waves and complex feed mode; the invention designs a super surface capable of independently controlling transmission and reflection amplitude and phase as a partial reflection surface of a Fabry-Perot resonant cavity antenna, and high-gain vortex electromagnetic waves with the mode number of +1 or-1 are generated by performing corresponding phase compensation on transmitted high-gain plane electromagnetic waves; moreover, the antenna has the characteristics of low section, simple structure and simple feed, can realize large-scale array by adopting a PCB processing technology, and has low processing difficulty and lower cost; finally, the Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on the super surface can generate vortex electromagnetic waves with the mode number of +1 at 10GHz, and the gain can reach 11.9dBi.
Description
Technical Field
The invention belongs to the field of vortex electromagnetic wave antennas, relates to a vortex wave generator, and particularly provides a Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on a super-surface.
Background
In recent decades, modern information communication technology has been rapidly developed, and wireless communication technology has received wide attention due to its real-time and portability, and also has put higher demands on the broadband and high speed of wireless communication technology. Communication speed and spectrum utilization rate are optimized and improved from 2G and 3G to 4G and 5G communication networks, but the requirements of explosive increase of data capacity at present are still not met, a new method is needed for more reasonably utilizing spectrum resources, and the resource utilization rate of the spectrum is further greatly improved. Vortex electromagnetic waves are different from spherical electromagnetic waves and plane electromagnetic waves due to the fact that the vortex electromagnetic waves carry Orbital Angular Momentum (OAM), and theoretically have mutually orthogonal infinite order modes due to the spiral characteristics of phases of the vortex waves, different modes can provide different transmission channels to achieve propagation multiplexing of the vortex electromagnetic waves, and a new development direction is provided for improving communication rate and spectrum utilization rate.
There are three main methods for generating vortex electromagnetic waves: the method comprises a plane wave conversion method, a high order mode patch method and a circular array method, and the vortex electromagnetic wave antenna of the traditional method has many problems in the aspects of size, gain, feed network complexity, mode multiplexing and the like, so that the practical engineering application of the vortex electromagnetic wave antenna is limited. The Fabry-Perot resonator antenna has the advantages of simple structure and high gain, and is used for improving the gain and reducing the diffusion angle of the vortex electromagnetic wave antenna in combination with the traditional vortex electromagnetic wave antenna in recent years, but still has the problem that an external feed network is complex. Therefore, it is necessary to provide a vortex electromagnetic wave antenna with simple structure, simple feeding method, high gain and low profile.
Disclosure of Invention
The invention aims to provide a super-surface-based Fabry-Perot resonant cavity vortex electromagnetic wave antenna which is used for solving the problems of low gain of vortex electromagnetic waves and complex feed mode; the invention designs a super surface capable of independently controlling reflection and transmission amplitude and phase as a partial reflecting surface of a Fabry-Perot resonant cavity antenna so as to form a vortex electromagnetic wave antenna and generate vortex electromagnetic waves with high gain mode number of +1 or-1.
In order to achieve the purpose, the invention adopts the technical scheme that:
a super-surface based fabry-perot resonator vortex electromagnetic wave antenna, comprising: the antenna comprises a metal grounding plate, a dielectric substrate, a feed source antenna, a coaxial cable, an air cavity and a partial reflecting surface, wherein the metal grounding plate is arranged on the lower surface of the dielectric substrate; it is characterized in that the preparation method is characterized in that,
the partial reflecting surface is formed by M multiplied by N partial reflecting units which are adjacent, and each partial reflecting unit is formed by a lower metal layer, a lower dielectric layer, an intermediate metal layer, an adhesive dielectric layer, an upper dielectric layer and an upper metal layer which are sequentially stacked from bottom to top; the lower dielectric layer, the adhesive dielectric layer and the upper dielectric layer are square with the same size, the lower metal layer is a rectangular metal patch and is positioned in the center of the lower surface of the lower dielectric layer, the long edge of the rectangular metal patch is perpendicular to the polarization direction of electromagnetic wave transmitted by the feed source antenna, and the long edge is the same as the side length of the lower dielectric layer; the upper metal layer is composed of a plurality of metal strips which are arranged at equal intervals, the long edge of each metal strip is parallel to the polarization direction of electromagnetic wave transmitted by the feed source antenna, and the long edge is the same as the side length of the upper dielectric layer; the metal layer is an I-shaped metal patch which is positioned in the center of the upper surface of the lower dielectric layer and on the diagonal line of the lower dielectric layer;
the partial reflecting surface is divided into equal parts according to the central angle with the center as the centernThe I-shaped metal patches of all the partial reflection units in each partial reflection area provide the same phase compensation for the transmitted electromagnetic waves, and the n partial reflection areas provide the phase compensation for the transmitted electromagnetic waves and sequentially increase or decrease (360/n) ° clockwise.
Further, in the partially reflecting surface,nthe value range of (A) is as follows: an integer of not less than 4.
Furthermore, in the partial reflection unit, the "i" shaped metal patch is composed of a central axis metal wire and arc metal wires symmetrically connected to two ends of the central axis metal wire, the central axis metal wire is located on any diagonal line of the lower dielectric layer, the center of the arc metal wire coincides with the center of the central axis metal wire, and the center angle of the arc metal wire is α.
Furthermore, the partial reflection units are divided into a first partial reflection unit and a second partial reflection unit, the central axis metal lines of the I-shaped metal patches in the first partial reflection unit and the second partial reflection unit are respectively positioned on different diagonal lines of the lower dielectric layer, and the I-shaped metal patches in the first partial reflection unit and the second partial reflection unit respectively provide phase compensation in a range of 180 degrees for the transmitted electromagnetic wave by adjusting the central angle of the circular arc metal line.
The invention has the beneficial effects that:
the invention provides a Fabry-Perot resonant cavity vortex electromagnetic wave antenna based on a super surface, which is characterized in that the super surface capable of independently controlling transmission and reflection amplitude and phase is designed to be used as a partial reflection surface of the Fabry-Perot resonant cavity antenna, high-gain plane waves are formed by multiple partial reflection and partial transmission of electromagnetic waves in the Fabry-Perot resonant cavity antenna, corresponding phase compensation is carried out on the high-gain plane waves, and then high-gain vortex electromagnetic waves with the mode number of +1 or-1 are generated; moreover, the antenna has the characteristics of low section, simple structure and simple feed, can realize large-scale array by adopting a PCB processing technology, and has low processing difficulty and lower cost; finally, the super-surface-based Fabry-Perot resonant cavity vortex electromagnetic wave antenna can generate vortex electromagnetic waves with the mode number of +1 at 10GHz, and the gain can reach 11.9dBi.
Drawings
Fig. 1 is a schematic structural diagram of a super-surface based fabry-perot resonator vortex electromagnetic wave antenna in the present invention, wherein: the antenna comprises a metal ground plate 1, a dielectric substrate 2, a feed source antenna 3, a coaxial cable 4, an air cavity 5 and a partial reflecting surface 6.
Fig. 2 is a schematic structural diagram of a partial reflection unit of the partial reflection surface of the present invention.
FIG. 3 is a schematic structural diagram of a lower metal layer of a partial reflection unit according to the present invention.
FIG. 4 is a schematic structural diagram of an upper metal layer of a partial reflection unit according to the present invention.
Fig. 5 is a schematic structural diagram of a metal layer in a first partial reflection unit according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a metal layer in a second partial reflection unit in the embodiment of the invention.
Fig. 7 is a schematic diagram illustrating a division of a partial reflection area of a partial reflection surface according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of the operation principle of the partial reflecting surface in the embodiment of the present invention.
Fig. 9 is a diagram showing simulation results of reflection coefficient amplitudes of the partial reflection units in the embodiment of the present invention.
Fig. 10 is a diagram illustrating simulation results of reflection coefficient phases of the partial reflection units according to the embodiment of the present invention.
Fig. 11 is a diagram illustrating simulation results of the transmission coefficient amplitude of each partial reflection unit in the embodiment of the present invention.
Fig. 12 is a diagram showing simulation results of phases of transmission coefficients of the partial reflection units according to the embodiment of the present invention.
FIG. 13 is a three-dimensional far-field radiation pattern of a super-surface based Fabry-Perot cavity vortex electromagnetic wave antenna at 10GHz in an embodiment of the invention.
FIG. 14 is an amplitude distribution diagram of a tangential electric field of a super-surface based Fabry-Perot cavity vortex electromagnetic wave antenna at 10GHz in an embodiment of the invention.
FIG. 15 is a phase distribution diagram of a tangential electric field of a super-surface based Fabry-Perot cavity vortex electromagnetic wave antenna at 10GHz in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear and complete, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
The present embodiment provides a super-surface based fabry-perot resonator vortex electromagnetic wave antenna, whose structure is shown in fig. 1, including: the antenna comprises a metal ground plate 1, a dielectric substrate 2, a feed source antenna 3, a coaxial cable 4, an air cavity 5 and a partial reflecting surface 6; the antenna comprises a dielectric substrate 2, a metal ground plate 1, a feed source antenna 3, a coaxial cable 4, a partial reflecting surface 6 and an air cavity 5, wherein the metal ground plate 1 is arranged on the lower surface of the dielectric substrate 2, the feed source antenna 3 is arranged on the upper surface of the dielectric substrate 2 and is positioned in the center, the coaxial cable penetrates through the dielectric substrate 2 and then is connected with the feed source antenna 3, the partial reflecting surface 6 is arranged right above the feed source antenna 3, and the air cavity 5 is formed between the partial reflecting surface and the feed source antenna;
the partial reflection surface is formed by M multiplied by N partial reflection units which are adjacently connected, and each partial reflection unit is formed by a lower metal layer, a lower dielectric layer, a middle metal layer, an adhesive dielectric layer, an upper dielectric layer and an upper metal layer which are sequentially stacked from bottom to top, as shown in figure 2; the lower dielectric layer, the adhesive dielectric layer and the upper dielectric layer are square with the same size, the lower metal layer is a rectangular metal patch and is positioned in the center of the lower surface of the lower dielectric layer, the long edge of the rectangular metal patch is perpendicular to the polarization direction of electromagnetic wave transmitted by the feed source antenna, and the long edge is the same as the side length of the lower dielectric layer, as shown in fig. 3; the upper metal layer is composed of a plurality of metal strips which are arranged at equal intervals, the long edge of each metal strip is parallel to the polarization direction of electromagnetic wave transmitted by the feed antenna, and the long edge is the same as the side length of the upper dielectric layer, as shown in fig. 4; the metal layer is an I-shaped metal patch, the I-shaped metal patch is positioned in the center of the upper surface of the lower dielectric layer and on the diagonal line of the lower dielectric layer, and the I-shaped metal patch provides phase compensation for the transmitted electromagnetic waves;
the partial reflecting surface is divided into equal parts according to the central angle with the center as the centernAnd all the partial reflection units in each partial reflection region provide the same phase compensation for the transmitted electromagnetic waves, and the n partial reflection regions sequentially increase (360/n) degrees or decrease (360/n) degrees in the clockwise direction for the phase compensation provided for the transmitted electromagnetic waves, so that the vortex electromagnetic waves with the mode number of +1 or-1 are correspondingly generated respectively.
In terms of working principle: the I-shaped metal patches in the partial reflection unit are symmetrically connected with each other by a central axis metal wireThe center of the arc metal wire is coincided with the center of the center axis metal wire, and the central angle of the arc metal wire is alpha; the central axis metal wire is positioned on any diagonal line of the lower dielectric layer, when the phase compensation within a 180-degree range can be provided for the transmitted electromagnetic wave by adjusting the central angle of the arc metal wire as shown in fig. 5, and when the phase compensation within another 180-degree range can be provided for the transmitted electromagnetic wave by adjusting the central angle of the arc metal wire as shown in fig. 6, namely, the phase adjustment within a 360-degree range of the transmitted electromagnetic wave is realized; moreover, when the angles of the centers of the circular arc metal lines are the same, the phase compensation provided by the two types of I-shaped metal patches for transmitting the electromagnetic waves has a phase difference of 180 degrees as shown in fig. 5 and 6; therefore, the partial reflecting surface is divided into the partial reflecting surfaces according to the mode of equally dividing the central angle with the center as the center of a circlenAfter n partial reflection areas are limited to provide phase compensation for the transmission electromagnetic wave and sequentially increase (360/n) ° or decrease (360/n) ° along the clockwise direction, the direction and the size (the central angle alpha of the arc metal wire) of the I-shaped metal patch of the partial reflection unit in each partial reflection area can be determined through simulation without doubt, and the simulation process is not repeated. In addition, the number of the metal strips in the upper metal layer can also be determined through simulation according to the working index of the antenna.
Based on the above fabry-perot resonator vortex electromagnetic wave antenna based on the super surface and the working principle thereof, the embodiment further provides a corresponding simulation test:
in the Fabry-Perot resonant cavity vortex electromagnetic wave antenna, a dielectric substrate 2 is made of Rogers RO4003C, the relative dielectric constant of the dielectric substrate is 3.55, and the dimensions of the dielectric substrate are 140mm multiplied by 0.813mm; the size of the metal grounding plate 1 is 140mm multiplied by 140mm; the thickness of the air cavity 3 is 15mm; the size of the partial reflecting surface 6 is 140mm multiplied by 3.148mm, and the partial reflecting surface is composed of 20 multiplied by 20 partial reflecting units; the feed source antenna 3 adopts a rectangular microstrip antenna, the size of the rectangular microstrip antenna is 7.1mm multiplied by 7.1mm, the feed source antenna is subjected to offset feed by a coaxial cable 4 to generate y-polarization linear plane electromagnetic waves, and a partial reflection unit partially reflects the y-polarization linear plane electromagnetic waves and transmits the other part of the y-polarization linear plane electromagnetic waves into x-polarization linear plane electromagnetic waves; in the partial reflection unit, the lower dielectric layer and the upper dielectric layer are both made of Rogers RO4003C, the relative dielectric constants of the lower dielectric layer and the upper dielectric layer are both 3.55, and the thicknesses of the lower dielectric layer and the upper dielectric layer are both 1.524mm; the material of the adhesive medium layer is Rogers RO4450B, the relative dielectric constant of the adhesive medium layer is 3.7, and the thickness of the adhesive medium layer is 0.1mm; the upper metal layer is composed of 8 metal strips, the width of each metal strip is 0.3mm, the interval is 0.45mm, the size of each partial reflection unit is 6mm multiplied by 3.148mm, and a medium frame with the width of 10mm is added outside 20 multiplied by 20 partial reflection units for facilitating engineering installation;
further, the partial reflecting surface 6 is divided into 8 partial reflecting areas in an evenly-divided manner according to a central angle taking the center as a circle center, and as shown in fig. 7, the partial reflecting areas are numbered as partial reflecting areas 6-1 to 6-8 in sequence in a clockwise direction; and a partial reflection unit of the metal layer using the "i" shaped metal patch as shown in fig. 5 is called a first partial reflection unit, a partial reflection unit of the metal layer using the "i" shaped metal patch as shown in fig. 6 is called a second partial reflection unit, the first partial reflection unit is used in the partial reflection regions 6-1 to 6-4, the second partial reflection unit is used in the partial reflection regions 6-5 to 6-8, and the sizes (central angles α of the circular arc metal lines) of the "i" shaped metal patches of the first partial reflection units in the partial reflection regions 6-1 to 6-4 are sequentially: 84 degrees, 28 degrees, 17.5 degrees and 7.5 degrees, the sizes (central angles alpha of the circular arc metal lines) of the I-shaped metal patches of the second partial reflection units in the partial reflection areas 6-5 to 6-8 are as follows: 84 °, 28 °, 17.5 °, and 7.5 °; finally, as shown in fig. 8, the partial reflection areas 6-1 to 6-8 sequentially increase 45 ° in the clockwise direction for providing phase compensation for the transmitted electromagnetic waves, and the fabry-perot resonator vortex electromagnetic wave antenna converts the linear planar electromagnetic waves into vortex electromagnetic waves with a mode number of + 1.
The Fabry-Perot resonant cavity vortex electromagnetic wave antenna is tested, and the test result is shown in FIGS. 9-15; specifically, the method comprises the following steps:
as shown in fig. 9 and 10, which are simulation result diagrams of the amplitude and phase of the reflection coefficient of y-y polarization of partial reflection units in the partial reflection areas 6-1 to 6-8, it can be seen from the diagrams that the amplitudes of the reflection coefficients of the partial reflection units corresponding to the 8 partial reflection areas are all between 0.94 and 0.98 at 10GHz, and the phases of the reflection coefficients are almost the same at 10GHz, which indicates that the partial reflection units corresponding to the 8 partial reflection areas do not have the phase regulation and control capability on the reflected electromagnetic waves;
as shown in fig. 11 and 12, which are simulation result diagrams of the amplitude and phase of the transmission coefficient of y-x polarization of the partial reflection units in the partial reflection areas 6-1 to 6-8, it can be seen from the diagrams that the amplitude of the transmission coefficient of the partial reflection unit corresponding to 8 partial reflection areas is between 0.18 to 0.32 at 10GHz, and the phase difference of the transmission coefficient is 45 ° in sequence at 10GHz, which indicates that the partial reflection units corresponding to 8 partial reflection areas have good phase regulation and control capability on the transmitted electromagnetic wave and meet the design requirements;
as shown in fig. 13, which is a three-dimensional far-field radiation pattern of the fabry-perot resonator vortex electromagnetic wave antenna at 10GHz in this embodiment, it can be seen from the figure that the central field in the radiation direction is small, and is consistent with the basic characteristics of the vortex electromagnetic wave radiation pattern, and the gain at 10GHz is 11.9 dBi;
as shown in fig. 14 and 15, which are tangential electric field amplitude and phase distribution diagrams of the fabry-perot resonator vortex electromagnetic wave antenna at 10GHz in the embodiment, it can be seen from the diagrams that the electric field amplitude obtains the minimum value at the center, and energy is mainly concentrated around the center of the radiation direction; the phase of the electric field is spiral and changes 360 degrees clockwise around the center in a circle;
in summary, the fabry-perot resonator vortex electromagnetic wave antenna provided by the invention can generate vortex electromagnetic waves with high gain and the mode number of +1 or-1, has the advantages of low profile, simple feeding mode and the like, can be manufactured by using a PCB process, has low manufacturing cost, and can be widely applied to practical engineering.
While the invention has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.
Claims (2)
1. A super-surface based fabry-perot resonator vortex electromagnetic wave antenna, comprising: the antenna comprises a metal grounding plate, a dielectric substrate, a feed source antenna, a coaxial cable, an air cavity and a partial reflecting surface, wherein the metal grounding plate is arranged on the lower surface of the dielectric substrate; it is characterized in that the preparation method is characterized in that,
the partial reflecting surface is formed by M multiplied by N partial reflecting units which are adjacent, and each partial reflecting unit is formed by a lower metal layer, a lower dielectric layer, an intermediate metal layer, an adhesive dielectric layer, an upper dielectric layer and an upper metal layer which are sequentially stacked from bottom to top; the lower dielectric layer, the adhesive dielectric layer and the upper dielectric layer are square with the same size, the lower metal layer is a rectangular metal patch and is positioned in the center of the lower surface of the lower dielectric layer, the long edge of the rectangular metal patch is perpendicular to the polarization direction of electromagnetic waves transmitted by the feed source antenna, and the long edge is the same as the side length of the lower dielectric layer; the upper metal layer is composed of a plurality of metal strips which are arranged at equal intervals, the long edge of each metal strip is parallel to the polarization direction of electromagnetic waves transmitted by the feed source antenna, and the long edge is the same as the side length of the upper dielectric layer; the metal layer is an I-shaped metal patch which is positioned in the center of the upper surface of the lower dielectric layer and on the diagonal line of the lower dielectric layer;
the partial reflecting surface is divided into equal parts according to the central angle with the center as the centernThe I-shaped metal patches of all the partial reflection units in each partial reflection area provide the same phase compensation for the transmitted electromagnetic wave,nthe phase compensation provided by the partial reflection areas for the transmission electromagnetic waves sequentially increases (360/n) DEG or decreases (360/n) DEG along the clockwise direction;
in the partially reflecting surface, the light-reflecting surface,nis an integer of not less than 4, and M, N are not less thannIs an integer of (1).
2. The Fabry-Perot cavity vortex electromagnetic wave antenna based on the super-surface as claimed in claim 1, wherein the "I" shaped metal patch in the partially reflecting unit is composed of a central axis metal line and arc metal lines symmetrically connected to both ends of the central axis metal line, the central axis metal line is located on any diagonal line of the lower dielectric layer, the center of the arc metal line coincides with the center of the central axis metal line, and the center angle of the arc metal line is α.
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| CN114709626A (en) | 2022-07-05 |
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