CN108306101B - Terahertz wave band acetylene black gradual change fractal wide-slit array antenna - Google Patents
Terahertz wave band acetylene black gradual change fractal wide-slit array antenna Download PDFInfo
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- CN108306101B CN108306101B CN201810082625.5A CN201810082625A CN108306101B CN 108306101 B CN108306101 B CN 108306101B CN 201810082625 A CN201810082625 A CN 201810082625A CN 108306101 B CN108306101 B CN 108306101B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000006230 acetylene black Substances 0.000 title claims abstract description 40
- 230000005855 radiation Effects 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 241000533950 Leucojum Species 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
- H01Q1/368—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor using carbon or carbon composite
-
- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/064—Two dimensional planar arrays using horn or slot aerials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention provides a terahertz wave band acetylene black gradual change fractal wide-slit array antenna, which is characterized by comprising the following components: the antenna comprises a substrate, an antenna grounding plate attached to the back surface of the substrate and an acetylene black gradual change fractal wide-slit array radiation patch attached to the front surface of the substrate; the antenna grounding plate is of a full acetylene black conductive ink grounding structure; the fractal wide-slit array radiation patch with the gradual change of the acetylene black is an antenna array formed by arranging fractal wide-slit small antennas according to a rectangular array structure; the structure of the fractal wide slot small antenna comprises a square outer boundary, and four sides of a square inner boundary concentric and parallel to the square outer boundary are respectively replaced by snowflake-shaped wide slot inner boundaries of 1-order or 2-order or 3-order Koch fractal lines with the same order. The invention has excellent wideband working characteristic, higher radiation intensity and good corrosion resistance, can work for a long time in outdoor open air environment, and has the application field superior to the conventional antenna of the terahertz wave band which can only be packaged in equipment to work.
Description
Technical Field
The invention belongs to the field of mobile terminal antennas, and particularly relates to a terahertz wave band acetylene black gradual change fractal wide-slit array antenna.
Background
Along with the continuous development of terahertz wave sources and terahertz wave detection technologies, terahertz waves are increasingly widely used. The terahertz wave has an operating frequency between the microwave and infrared bands, and a common operating frequency range of 0.1-10 THz (1 thz=10 12 Hz). Terahertz waves have the performance characteristics of microwaves and light waves and have excellent performances which are not possessed by electromagnetic waves in a plurality of other frequency bands. The terahertz wave has low energy, can not hurt a detection object when being used for detecting organisms, and is hopeful to be obtained in the field of medical detectionWidely used; the frequency of the terahertz wave is 500-1000 times of that of the microwave, the frequency width is large, a large amount of information can be carried, the terahertz wave is used in the communication field, the transmission speed can be forward spanned by a large step, and the communication technology is developed to be a new step; the terahertz wave has excellent penetrability, has excellent perspective imaging effect on nonpolar liquid, and can play an important role in the security inspection field based on the imaging technology of the terahertz wave; the photon energy of the terahertz wave is about 4.14 mcV, 98% of the photon energy emitted in the cosmic explosion process is in the terahertz frequency range, and the terahertz wave is the main electromagnetic wave for future cosmic detection.
Terahertz wave band equipment is not separated from a terahertz wave band antenna serving as a terahertz wave transmitting and receiving device. The performance requirements of the existing terahertz equipment on the terahertz wave band antenna are as follows: the terahertz wave band broadband optical fiber can work in a terahertz wave band broadband, the absolute working bandwidth is larger than 0.1 THz, the relative working bandwidth is larger than 10%, the working center frequency is near 1 THz, the radiation intensity is high, the minimum value of return loss is smaller than-20 dB, and the transmission quality of terahertz electromagnetic waves can be guaranteed in various unpredictable electromagnetic environments.
Disclosure of Invention
Aiming at the defects and the blank existing in the prior art, the invention aims to provide a novel antenna structural design which can work in a terahertz wave band broadband, has an absolute working bandwidth larger than 0.1 THz, a relative working bandwidth larger than 10%, a working center frequency near 1 THz, and a radiation intensity higher, and has a minimum value of return loss smaller than-20 dB, and the technical scheme is as follows:
the utility model provides a terahertz wave band acetylene black gradual change fractal wide slit array antenna which characterized in that includes: the antenna comprises a substrate, an antenna grounding plate attached to the back surface of the substrate and an acetylene black gradual change fractal wide-slit array radiation patch attached to the front surface of the substrate; the antenna grounding plate is of a full acetylene black conductive ink grounding structure; the acetylene black gradual change fractal wide-slit array radiation patch is an antenna array formed by arranging fractal wide-slit small antennas according to a rectangular array structure; the structure of the fractal wide-slit small antenna comprises a square outer boundary, and four sides of a square inner boundary concentric and parallel to the square outer boundary are respectively replaced by snowflake-shaped wide-slit inner boundaries of 1-order or 2-order or 3-order Koch fractal lines with the same order.
Preferably, the dimension of the fractal wide slot small antenna is 45 μm+ -1 μm×45 μm+ -1 μm.
Preferably, the side length of the square outer boundary is 45 μm plus or minus 1 μm; the size of the inner boundary of the snowflake-shaped wide seam is 42.6 mu m plus or minus 0.1 mu m multiplied by 42.6 mu m plus or minus 0.1 mu m.
Preferably, the antenna array of the acetylene black gradient fractal wide-slit array radiation patch comprises 5 rows, wherein the snowflake-shaped wide-slit inner boundaries of the 1 st row and the 5 th row of fractal wide-slit small antennas adopt 1-order Koch fractal lines, the snowflake-shaped wide-slit inner boundaries of the 2 nd row and the 4 th row of fractal wide-slit small antennas adopt 2-order Koch fractal lines, and the snowflake-shaped wide-slit inner boundaries of the 3 rd row of fractal wide-slit small antennas adopt 3-order Koch fractal lines.
Preferably, the acetylene black gradual change fractal wide-slit array radiation patch is formed by arranging 20 fractal wide-slit small antennas according to a 5-row 4-column rectangular array structure.
Preferably, the acetylene black gradient fractal wide-slit array radiation patch at least comprises 20 array element areas in 5 rows and 4 columns, the size of each array element area is 50 mu m+/-1 mu m multiplied by 50 mu m+/-1 mu m, and a fractal wide-slit small antenna is arranged at the center of each array element area.
Preferably, a feeding point is arranged at the center of the bottom edge of each fractal wide-slit small antenna.
Preferably, the substrate is a low-loss terahertz wave band wave-transparent ceramic substrate, and the relative dielectric constant is 20+/-3.
Preferably, the substrate has a rectangular shape with dimensions of 200 μm.+ -. 1 μm X250 μm.+ -. 1. Mu.m, and a thickness of 10 μm.+ -. 1. Mu.m.
Preferably, the antenna grounding plate and the acetylene black gradual change fractal wide-slit array radiation patch are printed by acetylene black conductive ink.
The fractal wide slot antenna is obtained by forming a fractal snowflake wide slot in the center of a square antenna radiation patch, and the shape of four edges of the fractal snowflake is a fractal structure with the same order. The slot edge of the fractal wide-slot antenna is of a fractal structure, the fractal wide-slot antenna has self-similarity, radio frequency current is uniformly distributed in the antenna, and the antenna has good broadband working characteristics.
In the related technical scheme of the invention, the working bandwidth of a single fractal wide slot antenna is larger, but the radiation intensity is not high. After the fractal wide-slit antenna is used as an array element antenna and the rectangular array structure is used for forming an antenna array, the radiation of the fractal wide-slit antennas is overlapped, so that the radiation intensity of the antenna can be effectively improved. If the order of the fractal structure used by the fractal wide-slit antennas of each row in the antenna array is gradually changed, the working frequency of the fractal wide-slit antennas of each row is also gradually changed, and the radiation of the fractal wide-slit antennas of a plurality of rows of different working frequencies is overlapped, so that a working frequency band with higher radiation intensity and larger working bandwidth can be formed.
The acetylene black is prepared from acetylene through high-temperature cracking, has extremely high chemical property stability, good surface activity and high conductivity. The acetylene black conductive ink has good conductive effect, does not contain metal, and has good corrosion resistance when used outdoors.
The fractal wide-slit antenna is adopted as the array element antenna, and the self-similarity of the fractal structure is utilized to ensure that the current inside the array element antenna is uniformly distributed, so that the antenna has the broadband working characteristic; the rectangular array structure is used for array, so that the radiation intensity of the antenna is effectively improved; the fractal structure used by the fractal wide-slit antennas of each row in the antenna array has the steps of gradual change, and the working frequencies of the fractal wide-slit antennas of each row are gradually changed and mutually overlapped, so that the working frequency band of the antenna is further widened. The antenna grounding plate and the radiation patch are manufactured by using the acetylene black conductive ink with stable chemical properties, so that the antenna is guaranteed to have better corrosion resistance, the service life of the antenna is prolonged, and the antenna has outdoor and outdoor working capacity.
The actual measurement result shows that the working center frequency of the antenna provided by the preferred scheme of the invention is 0.982 THz, the minimum value of return loss is-48.21 dB, the working frequency band range of the antenna is 0.542-1.438 THz, the absolute working bandwidth is 0.896 THz, and the relative working bandwidth is 90.51%, which indicates that all performance requirements of the traditional terahertz equipment can be met.
Compared to conventional antennas for the terahertz band: the designed antenna has excellent wideband working characteristics, and the working bandwidth reaches 0.896 THz, which is far higher than the working bandwidth level of 0.1 THz of the conventional antenna with the terahertz wave band; the designed antenna has higher radiation intensity, the minimum value of return loss is as low as-48.21 and dB, and the performance level of the minimum value of return loss of the conventional antenna in the terahertz wave band is far higher than that of the conventional antenna in the existing terahertz wave band by-20 and dB. The antenna with the design, which is manufactured by using the acetylene black conductive ink, has good corrosion resistance, can work for a long time in outdoor and outdoor environments, and has the application field superior to the conventional antenna with the terahertz wave band which can only be packaged in equipment to work.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
fig. 1 is a schematic diagram of the structure of a 1-order, 2-order, 3-order koch fractal line;
fig. 2 is a schematic diagram of a fractal wide slot small antenna with a snowflake wide slot inner boundary adopting 1-order, 2-order and 3-order koch fractal lines in an embodiment of the invention;
fig. 3 is a schematic diagram of a radiation patch structure of an acetylene black gradient fractal wide-slit array in an embodiment of the invention;
fig. 4 is a schematic diagram of an actually measured return loss of an antenna according to an embodiment of the present invention.
Detailed Description
In order to make the features and advantages of the present patent more comprehensible, embodiments accompanied with figures are described in detail below:
the embodiment of the invention comprises the following steps: the antenna comprises a substrate, an antenna grounding plate attached to the back surface of the substrate and an acetylene black gradual change fractal wide-slit array radiation patch attached to the front surface of the substrate; the antenna grounding plate is a full acetylene black conductive ink grounding structure formed by printing acetylene black conductive ink; the acetylene black gradual change fractal wide-slit array radiation patch is also printed by acetylene black conductive ink; the fractal wide-slit array radiation patch with the gradual change of the acetylene black is an antenna array formed by arranging fractal wide-slit small antennas according to a rectangular array structure; the structure of the fractal wide slot small antenna comprises a square outer boundary, and four sides of the square inner boundary concentric and parallel to the square outer boundary are respectively replaced by snowflake-shaped wide slot inner boundaries of 1-order or 2-order or 3-order Koch fractal lines with the same order, as shown in fig. 2.
As shown in fig. 1, koch fractal is a linear fractal structure, in which koch fractal rule of a line is: the initial element is a straight line segment (0 order), the initial element is equally divided into three small line segments, the middle small line segment is replaced by two small line segments with the same length and 60 degrees, and a 1-order Koch fractal line can be obtained; similar replacement is carried out on each straight line segment of the 1-order Koch fractal line, and a 2-order Koch fractal line can be obtained; the iteration is continued, and a Gao Jieke Hz fractal line can be obtained.
In this embodiment, the dimensions of the fractal wide slot small antenna are 45 μm+ -1 μm×45 μm+ -1 μm, with the side length of the square outer boundary being 45 μm+ -1 μm; the size of the inner boundary of the snowflake-shaped wide slit is 42.6 mu m + -0.1 mu m X42.6 mu m + -0.1 mu m.
In the embodiment, a rectangular array structure is used as a basic array arrangement structure for the acetylene black gradual change fractal wide-slit array radiation patch.
The working bandwidth of a single fractal wide-slit small antenna is large, but the radiation intensity is difficult to meet the requirement. After the rectangular array structure is used for array, the radiation of the fractal wide-slit small antennas is overlapped, so that the radiation intensity of the antennas can be effectively improved.
As shown in fig. 3, the acetylene black gradient fractal wide-slit array radiation patch comprises 20 array element areas in total of 5 rows and 4 columns, wherein the size of each array element area is 50 μm+/-1 μm×50 μm+/-1 μm, and a fractal wide-slit small antenna is arranged at the center of each array element area; the 20 fractal wide-slit small antennas are arranged according to a 5-row 4-column rectangular array structure. The snowflake-shaped wide slit inner boundaries of the 1 st row and the 5 th row of fractal wide slit small antennas adopt 1-order Koch fractal lines, the snowflake-shaped wide slit inner boundaries of the 2 nd row and the 4 th row of fractal wide slit small antennas adopt 2-order Koch fractal lines, and the snowflake-shaped wide slit inner boundaries of the 3 rd row of fractal wide slit small antennas adopt 3-order Koch fractal lines.
The slot edge of the fractal wide-slot small antenna is of a fractal structure, the fractal wide-slot small antenna has self-similarity, radio frequency current is uniformly distributed in the antenna, and the antenna has good broadband working characteristics. In the acetylene black gradual change fractal wide-slit array radiation patch, the order of a Koch fractal structure used by each row of fractal wide-slit small antennas is gradually changed, the working frequency of each row of fractal wide-slit small antennas is also gradually changed, and the radiation of a plurality of rows of fractal wide-slit small antennas with different working frequencies is overlapped, so that a working frequency band with higher radiation intensity and larger working bandwidth can be formed.
And a feed point is arranged at the center of the bottom edge of each fractal wide slit small antenna.
In this embodiment, the substrate is a low-loss terahertz wave band wave-transparent ceramic substrate, and the relative dielectric constant is 20±3.
The substrate is rectangular in shape, with dimensions of 200 μm.+ -. 1 μm X250 μm.+ -. 1. Mu.m, and a thickness of 10 μm.+ -. 1. Mu.m.
As shown in fig. 4, there is provided a return loss (S 11 ) The performance diagram shows that the antenna has the working center frequency of 0.982 THz, the minimum value of return loss of-48.21 dB, the antenna working band range of 0.542-1.438 THz, the absolute working bandwidth of 0.896 THz and the relative working bandwidth of 90.51 percent, can work in the terahertz wave band broadband, the absolute working bandwidth is far greater than 0.1 THz, the relative working bandwidth is far greater than 10 percent, the minimum value of return loss is far less than-20 dB, the antenna has larger performance redundancy, can completely meet the performance requirement of the existing terahertz wave band antenna, and has wide application prospect in the terahertz wave transmission and processing field.
The patent is not limited to the best mode, any person can obtain other various types of terahertz wave band acetylene black gradual change fractal wide-slit array antennas under the teaching of the patent, and all equivalent changes and modifications made according to the scope of the patent application are covered by the patent.
Claims (1)
1. The utility model provides a terahertz wave band acetylene black gradual change fractal wide slit array antenna which characterized in that includes: the antenna comprises a substrate, an antenna grounding plate attached to the back surface of the substrate and an acetylene black gradual change fractal wide-slit array radiation patch attached to the front surface of the substrate; the antenna grounding plate is of a full acetylene black conductive ink grounding structure; the acetylene black gradual change fractal wide-slit array radiation patch is an antenna array formed by arranging fractal wide-slit small antennas according to a rectangular array structure; the structure of the fractal wide-slit small antenna comprises a square outer boundary, and snowflake-shaped wide-slit inner boundaries of 1-order, 2-order or 3-order Koch fractal lines with the same order are respectively replaced by four sides of a square inner boundary which is concentric with and parallel to the square outer boundary;
the dimension of the fractal wide slot small antenna is 45 mu m plus or minus 1 mu m multiplied by 45 mu m plus or minus 1 mu m;
the side length of the outer boundary of the square is 45 mu m plus or minus 1 mu m; the size of the inner boundary of the snowflake-shaped wide seam is 42.6 mu m plus or minus 0.1 mu m multiplied by 42.6 mu m plus or minus 0.1 mu m;
the antenna array of the acetylene black gradual change fractal wide-slit array radiation patch comprises 5 rows, wherein the snowflake-shaped wide-slit inner boundaries of the 1 st row and the 5 th row of fractal wide-slit small antennas adopt 1-order Koch fractal lines, the snowflake-shaped wide-slit inner boundaries of the 2 nd row and the 4 th row of fractal wide-slit small antennas adopt 2-order Koch fractal lines, and the snowflake-shaped wide-slit inner boundaries of the 3 rd row of fractal wide-slit small antennas adopt 3-order Koch fractal lines;
the acetylene black gradual change fractal wide-slit array radiation patch is formed by arranging 20 fractal wide-slit small antennas according to a 5-row 4-column rectangular array structure;
the acetylene black gradual change fractal wide-slit array radiation patch comprises 20 array element areas in total of 5 rows and 4 columns, wherein the size of each array element area is 50 mu m+/-1 mu m multiplied by 50 mu m+/-1 mu m, and a fractal wide-slit small antenna is arranged at the center of each array element area;
a feed point is arranged at the center of the bottom edge of each fractal wide-slit small antenna;
the substrate is a low-loss terahertz wave band wave-transparent ceramic substrate, and the relative dielectric constant is 20+/-3;
the shape of the substrate is rectangular, the size is 200 mu m+/-1 mu m multiplied by 250 mu m+/-1 mu m, and the thickness is 10 mu m+/-1 mu m;
the antenna grounding plate and the acetylene black gradual change fractal wide-slit array radiation patch are printed by acetylene black conductive ink;
the working center frequency is 0.982 THz, the minimum value of return loss is-48.21 dB, the working band range of the antenna is 0.542-1.438 THz, the absolute working bandwidth is 0.896 THz, and the relative working bandwidth is 90.51%, so as to meet the working requirement in the terahertz wave band.
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| CN201810082625.5A CN108306101B (en) | 2018-01-29 | 2018-01-29 | Terahertz wave band acetylene black gradual change fractal wide-slit array antenna |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108306101B (en) * | 2018-01-29 | 2023-12-22 | 厦门大学嘉庚学院 | Terahertz wave band acetylene black gradual change fractal wide-slit array antenna |
| CN109239787A (en) * | 2018-09-19 | 2019-01-18 | 天津大学 | A kind of terahertz wave detector based on array plaster antenna |
| CN109728434B (en) * | 2019-01-24 | 2020-12-25 | 厦门大学嘉庚学院 | Rhombus multi-gap fractal array ultra-wideband antenna |
| CN109728432B (en) * | 2019-01-24 | 2021-01-29 | 厦门大学嘉庚学院 | Gradual change square gap fractal array ultra wide band antenna |
| CN110571534B (en) * | 2019-09-30 | 2021-01-29 | 厦门大学嘉庚学院 | Terahertz waveband triple photonic crystal fractal slot array antenna |
| CN110571536B (en) * | 2019-09-30 | 2021-01-29 | 厦门大学嘉庚学院 | Terahertz wave band gradual change defect patch fractal array antenna |
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