CN108899648A - A kind of wide band high-gain antenna applied to cerebration detection - Google Patents
A kind of wide band high-gain antenna applied to cerebration detection Download PDFInfo
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- CN108899648A CN108899648A CN201810723841.3A CN201810723841A CN108899648A CN 108899648 A CN108899648 A CN 108899648A CN 201810723841 A CN201810723841 A CN 201810723841A CN 108899648 A CN108899648 A CN 108899648A
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- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 230000000295 complement effect Effects 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 24
- 230000001788 irregular Effects 0.000 claims abstract description 17
- 230000024241 parasitism Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 13
- 210000004556 brain Anatomy 0.000 abstract description 8
- 230000003071 parasitic effect Effects 0.000 abstract description 4
- 239000011505 plaster Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 32
- 238000005516 engineering process Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 208000018152 Cerebral disease Diseases 0.000 description 1
- 206010008111 Cerebral haemorrhage Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002490 cerebral effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008560 physiological behavior Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000009466 transformation 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/106—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using two or more intersecting plane surfaces, e.g. corner reflector antennas
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The present invention discloses a kind of wide band high-gain antenna applied to cerebration detection, is made of irregular butterfly metal patch, metallic parasitic item and complementary ring and metallic reflection cavity.The foundation structure that the present invention uses butterfly antenna to optimize as antenna, antenna face constitutes irregular butterfly radiation patch by increasing parasitic item in Butterfly plaster on piece, and is fed using co-planar waveguide line, and coplanar waveguide structure is located at the centre of two irregular butterfly arms；And complementary is overleaf added, fluting is carried out by the triangle metal region in complementary structure and increases complementary ring electrical length to achieve the purpose that miniaturization.Three layers of reflection chamber of gradual change are placed below antenna simultaneously, the rectangular step structure which leads to gradual change is constituted.The present invention can also have the characteristics that low cost, structure are simple and easily conformal with brain while realizing antenna wide band high-gain.
Description
Technical field
The present invention relates to fields, and in particular to a kind of wide band high-gain antenna applied to cerebration detection.
Background technique
Current brain science development is in an important great-leap-forward development period, may generate at any time and change human lives
Important breakthrough.Brain is by cerebral nerve characterization and controls the entirely psychological activity of people and every physiological behavior.
Brain is that the mankind receive and central controller of the storage from extraneous massive information, any computer can not all match in excellence or beauty with it.Greatly
Brain manipulates the vital movement and senior thought of each organ in human body, the ability with self-teaching and evolution.Brain
Senior thought activity is that the mankind are fundamentally different from other animals, transformation and recognize naturally most important support.Therefore, it needs at present
The noninvasive cerebration new detecting technique of living body is studied to serve human medical's cause, while annotating cerebration from new angle
And its relationship of corresponding feature and cerebral disease.
With the development of antenna technology, high-gain and broadband have huge development latent in the microwave sounding of cerebration
In order to further detect the state of deep cerebration, by rationally designing the structure of antenna, wide-band high gain work can be realized in power
Make.Retrieval discovery is carried out to the prior art, the Chinese invention patent of Publication No. CN105832331 discloses a kind of " based on width
Non-contact cerebral hemorrhage detection device and its detection method with first technology ", which uses the dielectric layer of super thick, short-circuit wall
Grounding technology and antenna folds structure, overall dimensions length, width and height are 49mm × 24mm × 14mm, although antenna structure is simple, size
Less, but gain is low and narrower bandwidth.
Summary of the invention
The technical problem to be solved by the present invention is to gain existing in the prior art the technical issues of low and narrower bandwidth.
A kind of new wide band high-gain antenna for being applied to cerebration detection is provided, the wide band high-gain day of cerebration detection should be applied to
Line has the characteristics of antenna structure is simple, size is small, high gain and bandwidth.
In order to solve the above technical problems, the technical solutions adopted are as follows：
A kind of wide band high-gain antenna applied to cerebration detection, the antenna includes the co-planar waveguide of irregular butterfly
Antenna, and cross-sectional area is anti-greater than the metal of coplanar waveguide antenna cross-sectional area below the coplanar waveguide antenna main body
Cavity is penetrated, the metal reflection cavity includes three layers of ladder reflection chamber of gradual change；The front of the coplanar waveguide antenna includes two
Piece symmetrical irregular butterfly metal patch is connected with the co-planar waveguide line for feed between two panels butterfly metal patch,
The other side of two panels butterfly metal patch is arranged at intervals with square type parasitism item；The back side of the coplanar waveguide antenna be with irregularly
The complementary complementary ring in the coplanar waveguide antenna front of butterfly, complementary ring are provided with slot；Three layers of ladder reflection chamber be three layers gradually
The class loudspeaker cavity body structure that the stairstepping of change is constituted.
Feed structure overall dimensions of the invention are that 6mm × 8mm is best, can be realized integrated antenna miniaturization.The present invention
The both sides of middle butterfly arm patch are parasitic items spaced apart, and effect is to widen the bandwidth of antenna.The antenna back side be with just
The ring structure of face complementation, then by slotting on the three-legged structure region to complementary ring, to increase the electrical length of complementary ring, make
It is extended with being control working band to low frequency.
In above scheme, gain is improved for optimization and improves band impedance characteristic, further, three layers of ladder is anti-
Penetrating cavity includes three-ply metal, and bottom metal plate is extended with the transversal equal proportion that faces out of coplanar waveguide antenna, middle layer gold
Belong to plate outside equal proportion on the basis of bottom metal plate to extend, top metal plate is outside on the basis of intermetallic metal plate
Equal proportion extends.
Further, outside equal proportion on the basis of positive butterfly metal patch size of the complementary ring extends.
Further, the back side spacing distance of the top metal plate and coplanar waveguide antenna is λ 0/4, wherein λ0For
The center frequency wavelength of antenna coplanar waveguide antenna.
Further, the positive irregular butterfly center of the coplanar waveguide antenna, complementary ring center and three layers of ladder
Reflection chamber center is located on same vertical line.
Further, one of butterfly metal patch is connected with the inner core of sub-miniature A connector by intermediate through-hole, separately
One butterfly metal patch is connected to the outer core with sub-miniature A connector by upper and lower two through-holes.
Further, the angle between two three arms of angle of the two panels butterfly metal patch at the origin intersection is 82 °
Beneficial effects of the present invention：Compared with prior art, metal radiation patch of the invention is presented by co-planar waveguide line
Electricity.Metal reflection cavity can make antenna realize directed radiation, improve gain.By slotting on the complementary ring at the antenna back side
To increase the electrical length of antenna, to realize antenna miniaturization, while butterfly patch is being changed to irregular shape and in butterfly
Shape arm both sides add parasitic item effectively to broaden the impedance bandwidth of microstrip antenna.In addition, by design of Simulation, inventive antenna
Having a size of 66mm × 62mm, the relative aperture antenna of reflection cavity is slightly larger, and the distance between first layer cavity wall and antenna are λ0/ 4,
Middle λ0For the wavelength of the centre frequency 1.8GHz of antenna body.Bandwidth covers 1.1GHz-2.2GHz.In addition, the present invention can be
Also have the characteristics that low cost, structure are simple and easily conformal with brain while realizing antenna low frequency high-gain.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the overall structure diagram of the present embodiment.
Fig. 2 is the antenna face structure chart of the present embodiment.
Fig. 3 is the antenna face structure chart of the present embodiment
Fig. 4 is the reflection cavity structural schematic diagram of the present embodiment.
Fig. 5 is the impedance bandwidth performance plot of the present embodiment.
Fig. 6 is the gain characteristic figure of the present embodiment.
Fig. 7 is simulated radiation directional diagram of the present embodiment at centre frequency.
Appended drawing reference is as follows：The irregular butterfly metal radiation patch of 1-, coplanarly, 3- feeds co-planar waveguide to 2- butterfly metal
Line, the complementary ring of 4- fluting, tri- layers of gradual change ladder reflection cavity of 5-, first layer ladder reflect rectangular cavity -5-1, the reflection of second layer ladder
Rectangular cavity -5-2, third layer ladder reflect rectangular cavity -5-3；First coupling rectangular item -6-1；Second coupling rectangular item -6-2.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
Embodiment 1
The present embodiment provides a kind of wide band high-gain antennas applied to cerebration detection, as shown in Figure 1, including antenna sheet
Body, the antenna body are mainly the foundation structure by butterfly antenna as optimization, and the front of antenna is by optimizing and revising
Two irregular butterfly metal patches 1 are to carry out feed co-planar waveguide line 3 between two butterfly metal arms；The back side of antenna is one
A becket 4 complementary with the irregular butterfly metal patch of antenna face, it is one three stacked in the underface gap of antenna body
The ladder reflection cavity of layer gradual change.
Antenna generally rectangle in the present embodiment, reflection chamber below are to increase with antenna size different proportion
The horn shape that three layers of rectangular cavities are formed by stacking.
In the present embodiment, in order to improve performance, the irregular butterfly metal patch 1 of two of the antenna is slotted with the back side
Complementary ring 4 it is complementary in shape, immediately below reflection chamber 5 it is bigger compared with antenna size, and the center of three is located at same
On vertical line.
The positive radiation patch of antenna body is using a pair of regular butterfly radiation fin as optimization basis, two panels butterfly metal
Patch arm is symmetrically the same about the longitudinal axis, and the angle between two three arms of angle of butterfly metal patch at the origin intersection is 82 °.
The coupling of the first coupling rectangular 6-1 and second is added at the certain position for being separated by two butterfly metal arm both sides simultaneously
Rectangular strip 6-2 makes to couple gap at two between butterfly metal patch and shape rectangle parasitism item, to increase more resonance points,
To achieve the purpose that widen the beamwidth of antenna.
It modifies adjustment to the butterfly metal arm of rule, increases that four sizes are identical to indulge by the butterfly arm in rule
To rectangular strip, by adjusting the distance between the size of rectangular strip and rectangular strip, so that the impedance operator of antenna is improved.
It is the feed structure of antenna, the feeding classification of main body antenna structure between two butterfly metal patches of antenna face
It is using coplanar wave guide feedback line, the overall dimensions of feed structure are only 6mm × 8mm.The right arm of butterfly is by intermediate through-hole
It is connected with the inner core of sub-miniature A connector, left arm is connected by upper and lower two through-holes with the outer core of sub-miniature A connector.The feed structure 3 is logical
Metal micro-strip feeder line is crossed to connect with butterfly right arm.The width and length of metal micro-strip feeder line meet under front substrate material
Characteristic impedance is 50 Ω.
The back side of antenna body is an irregular complementary ring 4, and about 4 two triangle sheet metals of the complementation ring are about horizontal axis
It is symmetrically the same.The area being overlapped by the way that the carry out transverse cuts of Delta Region are reduced with back side ring with positive feed section 3, reaches
To the influence to intercouple between reduction tow sides radiation sheet metal.It slots, increases to the bottom edge of Delta Region simultaneously
The electrical length of complementary ring, to realize covering of the bandwidth to low frequency point 1.2GHz.
It uses a similar horn-like reflection chamber instead of traditional reflecting plate in the underface of antenna, is improved with reaching
The purpose of the gain of antenna.The reflection chamber is an overall volume three layer gradual change ladder cavity bigger than antenna, and the cavity
Center and the center of antenna be located on same vertical line.The bottom metal plate of metal reflection cavity is with the ratio of antenna overall dimensions
Example extends 27.5mm, and there are 0/4 distances of λ between antenna, and wherein λ 0 is the wave of the centre frequency 1.8GHz of antenna body
It is long.On cross shaft surface, the second layer and third layer ladder compare first layer reflected bottom plate and each extend over 2mm and 3mm.In longitudinal axis face
On, first layer, the second layer and third layer ladder upwardly extend the height of 30mm, 5mm, 10mm respectively, pass through three layers of not equal altitude
Gradual change stairstepping constitute the cavity body structures of a similar loudspeaker.Wherein third layer ladder is slightly above antenna surface layer 5mm, can be with
Play the role of guiding into.
For the thickness of medium substrate, it is overlying on the positive metal butterfly radiation patch 1 of medium substrate, co-planar waveguide
The thickness of feed line 3 and the complementary ring 4 at the antenna back side is minimum, from technique for, be on dielectric-slab apply copper realize.
Change three layers of graded metal reflection cavity 5 at a distance from antenna body, or change the height of the reflection cavity to make
The gain of antenna designed by it can change correspondingly.First layer metal plate and the antenna back side by optimization, when metal reflection cavity
The distance between complementary metal ring when being λ 0/4, wherein λ 0 is the center frequency wavelength of antenna body, can effectively reduce day
Line back lobe radiation, so as to improve antenna directionality and improve antenna gain.
Change the distance between second layer gradual change ladder 5-2 and third layer gradual change ladder 5-3, the impedance operator of antenna exists
It can be improved accordingly.
By optimization, when the distance between first layer gradual change ladder 5-1 and second layer gradual change ladder 5-2 are 30mm, and the
Two layers of gradual change flight 5-2 and third layer gradual change ladder 5-3 when being respectively when 10mm and 15mm at a distance from vertical direction, day
The impedance operator of line and gain obtain relatively good tradeoff.
Fig. 4-Fig. 6 is impedance bandwidth of the invention, axial ratio bandwidth and gain characteristic figure respectively.Wide band high-gain circular polarisation day
Line is less than -10dB in 1.1GHz~2.2GHz frequency range reflection coefficient, and relative impedances bandwidth is 66.6%.1.6GHz~
Within the scope of 2.2GHz, gain is greater than 8dB, and maximum gain reaches 9.42dB, and the average gain in impedance bandwidth is 8.14dB.
Fig. 7 is simulated radiation directional diagram of the present invention at centre frequency.Wide band high-gain circular polarized antenna is in 1.8GHz
Locating 3dB beam angle is 70.8 °, and the engineering process of the present embodiment is：The 3 outer signal source of coplanar wave guide feedback line, outside
The complementary metal ring for adding pumping signal by the right arm of irregular butterfly metal patch, and the energy coupled antenna back side being slotted,
By metal radiation patch 1, energy is radiate by the coplanar ground 2 of butterfly metal, complementary ring 4 of slotting, and completes wireless communication function.
Then so that antenna is realized directed radiation using by three layers of gradual change ladder metal reflection cavity 5, and pass through the gradual change hierarchic structure
Day is improved in the impedance operator of bandwidth frequency range, the final purpose for realizing wide band high-gain.The present embodiment has wide band high-gain
Outside characteristic, also has the characteristics that structure simple, low cost, easily conformal with brain.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the range of specific embodiment, to the common skill of the art
For art personnel, as long as long as various change the attached claims limit and determine spirit and scope of the invention in, one
The innovation and creation using present inventive concept are cut in the column of protection.
Claims (8)
1. a kind of wide band high-gain antenna applied to cerebration detection, it is characterised in that：The antenna includes irregular butterfly
Coplanar waveguide antenna, and be located at cross-sectional area below the coplanar waveguide antenna main body and be greater than coplanar waveguide antenna cross section
Long-pending metallic reflection cavity, the metal reflection cavity include three layers of ladder reflection chamber of gradual change；
The front of the coplanar waveguide antenna includes two panels symmetrically irregular butterfly metal patch, passes through coaxial feeding
Co-planar waveguide line connects two panels butterfly metal patch, and the other side of two panels butterfly metal patch is arranged at intervals with square type parasitism
Item；
The back side of the coplanar waveguide antenna is the complementary ring complementary with the coplanar waveguide antenna of irregular butterfly front, complementary ring
It is provided with slot；
Three layers of ladder reflection chamber is the class loudspeaker cavity body structure that the stairstepping of three layers of gradual change is constituted.
2. the wide band high-gain antenna according to claim 1 applied to cerebration detection, it is characterised in that：Described three layers
Ladder reflection chamber includes three-ply metal, and bottom metal plate is extended with the transversal equal proportion that faces out of coplanar waveguide antenna, in
Interbed metal plate outside equal proportion on the basis of bottom metal plate extends, and top metal plate is on the basis of intermetallic metal plate
Upper outside equal proportion extends.
3. the wide band high-gain antenna according to claim 2 applied to cerebration detection, it is characterised in that：The highest
The back side spacing distance of layer metal plate and coplanar waveguide antenna is λ0/ 4, wherein λ0For the centre frequency of antenna coplanar waveguide antenna
Wavelength.
4. the wide band high-gain antenna according to claim 1 applied to cerebration detection, it is characterised in that：The complementation
Outside equal proportion on the basis of positive butterfly metal patch size of ring extends.
5. the wide band high-gain antenna according to claim 1 applied to cerebration detection, it is characterised in that：It is described coplanar
The positive irregular butterfly center of radiating guide, complementary ring center and three layers of ladder reflection chamber center are located at same vertical line
On.
6. the wide band high-gain antenna according to claim 1 applied to cerebration detection, it is characterised in that：It is described wherein
One butterfly metal patch is connected with the inner core of sub-miniature A connector by intermediate through-hole, another butterfly metal patch is by up and down
Two through-holes are connected to the outer core with sub-miniature A connector.
7. -6 any wide band high-gain antenna for being applied to cerebration detection according to claim 1, it is characterised in that：Institute
The angle stated between two three arms of angle of two panels butterfly metal patch at the origin intersection is 82 °.
8. the wide band high-gain antenna according to claim 7 applied to cerebration detection, it is characterised in that：The butterfly
Metal patch is equipped with the identical longitudinal rectangular strip of four sizes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810723841.3A CN108899648B (en) | 2018-07-04 | 2018-07-04 | Broadband high-gain antenna applied to brain activity detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723841.3A CN108899648B (en) | 2018-07-04 | 2018-07-04 | Broadband high-gain antenna applied to brain activity detection |
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| Publication Number | Publication Date |
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| CN108899648A true CN108899648A (en) | 2018-11-27 |
| CN108899648B CN108899648B (en) | 2024-06-11 |
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| CN201810723841.3A Active CN108899648B (en) | 2018-07-04 | 2018-07-04 | Broadband high-gain antenna applied to brain activity detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109777733A (en) * | 2019-02-26 | 2019-05-21 | 中国人民解放军军事科学院军事医学研究院 | Microwave biological effect irradiation unit |
| CN109841952A (en) * | 2019-03-26 | 2019-06-04 | 湖南赛博诺格电子科技有限公司 | A kind of miniature antenna based on fold microstrip line |
| CN110108372A (en) * | 2019-05-07 | 2019-08-09 | 杭州电力设备制造有限公司 | A kind of crane with wireless and passive temperature sensing device |
| WO2020233477A1 (en) * | 2019-05-22 | 2020-11-26 | 维沃移动通信有限公司 | Antenna unit and terminal device |
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| CN109841952A (en) * | 2019-03-26 | 2019-06-04 | 湖南赛博诺格电子科技有限公司 | A kind of miniature antenna based on fold microstrip line |
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| WO2020233477A1 (en) * | 2019-05-22 | 2020-11-26 | 维沃移动通信有限公司 | Antenna unit and terminal device |
| US11973280B2 (en) | 2019-05-22 | 2024-04-30 | Vivo Mobile Communication Co., Ltd. | Antenna element and terminal device |
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| Publication number | Publication date |
|---|---|
| CN108899648B (en) | 2024-06-11 |
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