CN110571536A - Terahertz wave band gradual change defect patch fractal array antenna - Google Patents
Terahertz wave band gradual change defect patch fractal array antenna Download PDFInfo
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- CN110571536A CN110571536A CN201910937577.8A CN201910937577A CN110571536A CN 110571536 A CN110571536 A CN 110571536A CN 201910937577 A CN201910937577 A CN 201910937577A CN 110571536 A CN110571536 A CN 110571536A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- 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
- H01Q21/065—Patch antenna array
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- 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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- 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
Abstract
The invention relates to a terahertz waveband gradual-change defect patch fractal array antenna which is characterized by comprising a substrate, an antenna ground plate attached to the back of the substrate and a gradual-change defect patch fractal array radiation patch attached to the front of the substrate, wherein the gradual-change defect patch fractal array radiation patch is an antenna array formed by arranging small gradual-change defect patch fractal antennas according to a rectangular array structure. The working center frequency of the terahertz wave band is near 1 THz, the minimum value of the return loss is lower than-30 dB, the absolute working bandwidth is larger than 0.2THz, the relative working bandwidth is larger than 20%, and the terahertz wave band is resistant to damage and can stably work in a terahertz wave band broadband.
Description
Technical Field
The invention relates to a terahertz waveband gradual change defect patch fractal array antenna.
Background
With the continuous progress of the terahertz wave generation technology, a batch of high-performance terahertz wave sources are designed and produced, the bottleneck problem which troubles the development of the terahertz wave technology is solved, the terahertz wave related technology is rapidly developed, and numerous terahertz wave-based application products are put into practical use. The working frequency of the terahertz wave is higher than that of microwaves and lower than that of infrared rays, and the main working frequency range of the terahertz wave is 0.1-10 THz (1 THz =1012 Hz). The terahertz wave has the same straight-forward property as a light wave, has the same penetrability and absorbability as a microwave, and has unique properties which are not possessed by electromagnetic waves of other frequency bands. The terahertz wave has the characteristic of low energy, does not harm organisms when being used for detecting the organisms, and has great development prospect in the field of medical terahertz imaging and terahertz detection; terahertz waves have excellent penetrating power, and a safety detection device based on terahertz waves has high detection sensitivity and is widely applied to the field of detection of counter terrorism and dangerous liquid and dangerous gas; the terahertz wave has a large frequency width, can carry a large amount of information, is used in the communication field, and can greatly improve the transmission speed of wireless communication.
Disclosure of Invention
In view of this, the invention aims to provide a terahertz waveband gradual-change defect patch fractal array antenna, the working center frequency is near 1 THz, the minimum value of the return loss is lower than-30 dB, the absolute working bandwidth is greater than 0.2THz, the relative working bandwidth is greater than 20%, the terahertz waveband gradual-change defect patch fractal array antenna has damage resistance, and can stably work in a terahertz waveband broadband.
In order to achieve the purpose, the invention adopts the following technical scheme:
A terahertz waveband gradual change defect patch fractal array antenna comprises a substrate, an antenna ground plate attached to the back of the substrate and a gradual change defect patch fractal array radiation patch attached to the front of the substrate, wherein the gradual change defect patch fractal array radiation patch is an antenna array formed by arranging small gradual change defect patch fractal antennas according to a rectangular array structure.
Further, the antenna ground plate is a fully conductive ground structure.
Furthermore, the small fractal antenna with the gradually-changed defective patch is obtained by performing fractal iteration on the gradually-changed defective patch in a rectangular area with the size of 20 microns +/-1 micron multiplied by 20 microns +/-1 micron.
Further, the fractal iteration of the gradually-changed defect patches is specifically to divide a rectangular area into 10 rows and 10 columns of 100 small squares, and dig 1 small square above the left of 5 rows and 5 columns of 25 small square areas above the left; for the area of 25 small squares in 5 rows and 5 columns at the lower left, digging 4 small squares in 2 rows and 2 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the lower right, digging out 9 small squares in 3 rows and 3 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the upper right, digging 16 small squares in 4 rows and 4 columns at the upper left; finally, forming a 1-order gradually-changed defect patch fractal structure consisting of 70 small squares; the same replacement is carried out on each small square of the 1-order gradient defect patch fractal structure to obtain a 2-order gradient defect patch fractal structure; .
Further, the small tapered defective patch fractal antenna uses a tapered defective patch fractal structure of at least 2 steps.
Furthermore, the rectangular array structure comprises 16 array element areas which are 4 rows and 4 columns, the size of each array element area is 24 microns +/-1 micron multiplied by 24 microns +/-1 micron, and a small gradient defect patch fractal antenna is arranged in the center of each array element area.
furthermore, the substrate is a low-loss terahertz wave band wave-transmitting ceramic substrate, and the relative dielectric constant of the substrate is 50 +/-5.
Further, the substrate is rectangular in shape, the overall size of the substrate is 96 μm + -1 μm × 96 μm + -1 μm, and the thickness is 5 μm + -1 μm.
Furthermore, the antenna ground plate and the radiation patch are printed by conductive silver paste.
Compared with the prior art, the invention has the following beneficial effects:
The invention uses the fractal antenna with the gradually-changed defect patch as the antenna element, and the working frequency bands of a plurality of radiation gaps with different lengths of the structure of the gradually-changed defect patch are superposed, thereby ensuring that the antenna element has the working frequency band with larger bandwidth, ensuring that the radio frequency current in the antenna element is uniformly distributed due to the self-similarity of the fractal structure, and ensuring that the antenna has stable and reliable broadband working performance. The rectangular array structure is used for array, so that the radiation intensity of the antenna is effectively improved. The working center frequency of the terahertz wave band is near 1 THz, the minimum value of the return loss is lower than-30 dB, the absolute working bandwidth is larger than 0.2THz, the relative working bandwidth is larger than 20%, the terahertz wave band has certain damage resistance, and the terahertz wave band can stably work in a terahertz wave band broadband.
Drawings
FIG. 1 is a schematic diagram of fractal iteration of a progressive defect patch in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure in one embodiment of the present invention;
FIG. 3 shows return loss (S) in an embodiment of the present invention11) And (6) performance graphs.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
Referring to fig. 1, the invention provides a terahertz waveband gradual-change defect patch fractal array antenna, which includes a substrate, an antenna ground plate attached to the back of the substrate, and a gradual-change defect patch fractal array radiation patch attached to the front of the substrate; the fractal array radiation patch with the gradually-changed defects is an antenna array formed by arranging small fractal antennas with the gradually-changed defects according to a rectangular array structure; the antenna grounding plate is of a full-conductive grounding structure.
In this embodiment, the small tapered-defect patch fractal antenna is obtained by performing fractal iteration on a rectangular area with the size of 20 μm ± 1 μm × 20 μm ± 1 μm.
As shown in fig. 1, in this embodiment, the fractal iteration of the gradually-changed defect patches specifically includes dividing a rectangular area into 100 small squares in 10 rows and 10 columns, and for a 25 small square area in 5 rows and 5 columns above the left, digging 1 small square above the left; for the area of 25 small squares in 5 rows and 5 columns at the lower left, digging 4 small squares in 2 rows and 2 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the lower right, digging out 9 small squares in 3 rows and 3 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the upper right, digging 16 small squares in 4 rows and 4 columns at the upper left; finally, forming a 1-order gradually-changed defect patch fractal structure consisting of 70 small squares; and (3) carrying out the same replacement on each small square of the 1-order gradual-change defect patch fractal structure to obtain a 2-order gradual-change defect patch fractal structure. And further obtaining a fractal structure of a 3-order gradual-change defective patch on the basis of the fractal structure of the 2-order gradual-change defective patch.
in this embodiment, the tapered defective patch fractal small antenna uses a tapered defective patch fractal structure of at least 2 steps.
In this embodiment, the fractal array radiation patch with gradually changed defects uses a rectangular array structure as a basic array arrangement structure. The rectangular array structure comprises 16 array element areas including 4 rows and 4 columns, the size of each array element area is 24 micrometers +/-1 micrometer multiplied by 24 micrometers +/-1 micrometer, and a small gradient defect patch fractal antenna is arranged in the center of each array element area.
In this embodiment, the substrate is a low-loss terahertz band wave-transparent ceramic substrate, and the relative dielectric constant thereof is 50 ± 5.
In the present embodiment, the substrate is rectangular in shape, and the overall size of the substrate is 96 μm. + -. 1 μm X96 μm. + -. 1 μm, and the thickness is 5 μm. + -. 1 μm.
In this embodiment, the antenna ground plate and the radiation patch are printed by conductive silver paste.
As shown in FIG. 3, the return loss (S) of this embodiment is shown11) And (6) performance graphs. As can be seen from FIG. 3, the actual measurement results show that the working center frequency of the antenna is 1.000 THz, and the minimum value of the return loss is-43.39dB, the working frequency band range of the antenna is 0.577-1.353 THz, the absolute working bandwidth is 0.776 THz, and the relative working bandwidth is 80.41%. The actual measurement result shows that the working center frequency of the antenna is near 1 THz, the minimum value of return loss is lower than-30 dB, the absolute working bandwidth is larger than 0.2THz, the relative working bandwidth is larger than 20%, the antenna has certain damage resistance and can stably work in a terahertz wave band broadband.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. the terahertz waveband gradual change defect patch fractal array antenna is characterized by comprising a substrate, an antenna ground plate attached to the back of the substrate and a gradual change defect patch fractal array radiation patch attached to the front of the substrate, wherein the gradual change defect patch fractal array radiation patch is an antenna array formed by small gradual change defect patch fractal antennas arranged according to a rectangular array structure.
2. A terahertz wave band gradual change defect paster fractal array antenna is characterized in that: the antenna grounding plate is of a full-conductive grounding structure.
3. the terahertz waveband gradual-change defect patch fractal array antenna as claimed in claim 1, wherein: the small fractal antenna with the gradually-changed defective patch is obtained by performing fractal iteration on the gradually-changed defective patch in a rectangular area with the size of 20 mu m +/-1 mu m multiplied by 20 mu m +/-1 mu m.
4. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in claim 3, wherein: the fractal iteration of the gradually-changed defect patches is specifically to divide a rectangular area into 100 small squares in 10 rows and 10 columns, and dig 1 small square above the left of an area of 25 small squares in 5 rows and 5 columns above the left; for the area of 25 small squares in 5 rows and 5 columns at the lower left, digging 4 small squares in 2 rows and 2 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the lower right, digging out 9 small squares in 3 rows and 3 columns at the upper left; for the area of 25 small squares in 5 rows and 5 columns at the upper right, digging 16 small squares in 4 rows and 4 columns at the upper left; finally, forming a 1-order gradually-changed defect patch fractal structure consisting of 70 small squares; and (3) carrying out the same replacement on each small square of the 1-order gradual-change defect patch fractal structure to obtain a 2-order gradual-change defect patch fractal structure.
5. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in claim 3, wherein: the small fractal antenna with the gradually-changed defective patch uses a fractal structure with 2 or more orders of the gradually-changed defective patch.
6. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in claim 1, wherein: and an antenna feed point is arranged at the center of the bottom edge of each small fractal antenna with gradually-changed defects.
7. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in claim 1, wherein: the rectangular array structure comprises 16 array element areas including 4 rows and 4 columns, the size of each array element area is 24 micrometers +/-1 micrometer multiplied by 24 micrometers +/-1 micrometer, and a small gradient defect patch fractal antenna is arranged in the center of each array element area.
8. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in any one of claims 1 to 6, wherein: the substrate is a low-loss terahertz wave band wave-transmitting ceramic substrate, and the relative dielectric constant of the substrate is 50 +/-5.
9. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in any one of claims 1 to 6, wherein: the substrate is rectangular, the overall size of the substrate is 96 mu m +/-1 mu m multiplied by 96 mu m +/-1 mu m, and the thickness of the substrate is 5 mu m +/-1 mu m.
10. The terahertz waveband gradual-change defect patch fractal array antenna as claimed in any one of claims 1 to 6, wherein: the antenna ground plate and the radiation patch are printed by conductive silver paste.
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| CN201910937577.8A CN110571536B (en) | 2019-09-30 | 2019-09-30 | Terahertz wave band gradual change defect patch fractal array antenna |
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| CN201910937577.8A CN110571536B (en) | 2019-09-30 | 2019-09-30 | Terahertz wave band gradual change defect patch fractal array antenna |
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| CN110571536A true CN110571536A (en) | 2019-12-13 |
| CN110571536B CN110571536B (en) | 2021-01-29 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306101A (en) * | 2018-01-29 | 2018-07-20 | 厦门大学嘉庚学院 | The terahertz wave band acetylene black gradually wide array antenna of variant Fractal |
| CN109728432A (en) * | 2019-01-24 | 2019-05-07 | 厦门大学嘉庚学院 | The rectangular gap Fractal array ultra-wide band antenna of gradual change |
| CN109786955A (en) * | 2019-01-24 | 2019-05-21 | 厦门大学嘉庚学院 | A kind of photonic crystal gap Fractal array ultra-wide band antenna |
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- 2019-09-30 CN CN201910937577.8A patent/CN110571536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306101A (en) * | 2018-01-29 | 2018-07-20 | 厦门大学嘉庚学院 | The terahertz wave band acetylene black gradually wide array antenna of variant Fractal |
| CN109728432A (en) * | 2019-01-24 | 2019-05-07 | 厦门大学嘉庚学院 | The rectangular gap Fractal array ultra-wide band antenna of gradual change |
| CN109786955A (en) * | 2019-01-24 | 2019-05-21 | 厦门大学嘉庚学院 | A kind of photonic crystal gap Fractal array ultra-wide band antenna |
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| CN110571536B (en) | 2021-01-29 |
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