CN107275766A - A kind of wideband surface wave antenna loaded based on non-homogeneous periodic structure - Google Patents
A kind of wideband surface wave antenna loaded based on non-homogeneous periodic structure Download PDFInfo
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- CN107275766A CN107275766A CN201710365687.2A CN201710365687A CN107275766A CN 107275766 A CN107275766 A CN 107275766A CN 201710365687 A CN201710365687 A CN 201710365687A CN 107275766 A CN107275766 A CN 107275766A
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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
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0018—Space- fed arrays
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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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Abstract
The invention belongs to antenna technical field, a kind of wideband surface wave antenna loaded based on non-homogeneous periodic structure is disclosed, including：Periodicity metal patch array, periodicity metal patch array printing is in the upper surface of first medium substrate；First medium substrate is located at the top of second medium substrate and using air dielectric interval；Circular patch is printed on the upper surface of second medium substrate；Metal floor is located at the lower surface of second medium substrate；The inner wire connection circular patch of coaxial probe and the center of metal floor.The non-homogeneous periodic patches unit of the present invention is compared with the uniform period chip unit that existing surface-wave antenna is used, while two adjacent modes of resonance are motivated, by merging two modes of resonance, the bandwidth of broadening antenna；Compared with existing surface-wave antenna does not load the structure of air dielectric, feed element is coupled using proximal air and provides wider impedance bandwidth；The reduction of metal floor radius, increases the path of surface wave diffractional field, with broadband character.
Description
Technical field
The invention belongs to antenna technical field, more particularly to a kind of wideband surface ripple loaded based on non-homogeneous periodic structure
Antenna.
Background technology
Modern wireless communication systems, such as WLAN (WLAN), usually require that the horizontal omnidirectional directional diagram of aerial radiation one.
Traditional monopole sub-antenna, it is simple in construction, using the teaching of the invention it is possible to provide vertical polarization and horizontal directivity pattern has good omnidirectional's characteristic, but it is most
Big shortcoming is high section, is difficult to the limited platform in space.Microstrip antenna has low, lightweight section, small volume, Yi Ji
Into advantage, therefore be widely studied with the micro-strip paster antenna of omni-directional pattern.However, the major defect of microstrip antenna is
Narrower bandwidth is, it is necessary to using the technology of broadening bandwidth.Generally improving the method for the beamwidth of antenna includes：Increase medium plate thickness, profit
With fluting etc. on multilayer dielectric structure, loading parasitic element, loading probe and floor.Using thick dielectric-slab and multilayer dielectricity knot
Structure, will increase antenna height.Method using loading parasitic element will increase transversely or longitudinally antenna size.Load probe
Antenna processing is not easy to, and fluting can increase the back lobe radiation of antenna on floor.Therefore, low section omnidirectional micro-strip paster antenna exists
The drawbacks of still having certain in wireless communication system application.In recent years, with the development of artificial material, periodic structure causes people
Increasing concern, there is important application potential and value in field of antenna.The metal patch of one group of loading grounding probe
Piece can form mushroom-shaped EBG (electro-magnetic bandgap) structure, the characteristics of structure shows frequency band band gap, energy according to periodic arrangement
Suppress the performance of mutual coupling and raising printed antenna and circuit between the surface wave of antenna, reduction array antenna unit.It is periodically golden
Category array, which is placed on above floor, may be used as partially reflecting surface, improve simple radiation source (such as microband paste, Waveguide slot)
Gain.This periodicity metal array is also used as the radiating element of antenna, and such as LiuWei et al. is in document
《Metamaterial-based low-profile andbroadband mushroom antenna》Propose to utilize a compound left side
The mushroom-shaped structural cycle structure of the right hand encourages two adjacent modes of resonance by gap, can realized simultaneously as radiating element
Broadband character.Y.M.Pan et al. exists《A low-profile high gain andwideband filtering antenna
with metasurface》It is middle by the use of periodicity metal patch array heterogeneous as radiating element, devising a has
The antenna of filtering characteristic.In addition, periodic patches array printing can show as artificial magnetic conductor on ground connection dielectric-slab
(AMC) 180 ° of total reflection, is carried out to incident electromagnetic wave different from perfact conductor (PEC) surface, AMC surfaces are to the anti-of incidence wave
Phase shift is penetrated for 0 °, therefore when by the use of AMC surfaces as artificial floor or reflecting plate, antenna can be placed with ground distance between plates
It is close so as to reducing antenna height.To be easy to process, AMC structures can also use the periodicity for being not loaded with probe or via to paste
Piece is to realize, and this AMC surfaces have been obtained for extensive use in antenna low section is realized at present.When no loading is short
During road probe (via), cyclic array surface allows surface wave to pass through.Although for most of antenna, surface wave action
The radiation efficiency of antenna, should be suppressed as far as possible, but for needing the antenna using surface wave diffraction be it is favourable,
Therefore, a kind of interesting application of periodic structure is exactly design surface wave antenna.The usual section of surface-wave antenna is very low, and
The surface wave of TM patterns can also form the directional diagram of similar monopole, thus surface-wave antenna have in wireless communication field it is huge
Big application potential.However, the bandwidth of surface-wave antenna is general narrower, such as 2005 Fan Yang et al. are in periodical IEEE
Delivered on Microwave and Optical Technology Letter《A novel surface wave antenna
design using a thin periodically loaded ground plane》The surface-wave antenna of middle proposition is not using
Load the artificial floors of periodicity square patch Array Design AMC of probe so that symmetrical dipole only has 0.02 apart from artificial floor
λ0(being air medium wavelength), the beamwidth of antenna is 6%.F.Yang in 2007 et al. is published in periodical IEEE IET Antenna and
Document is delivered on Propagation《Low-profile surface wave antenna with a monopole-like
radiation pattern》, text in propose surface-wave antenna range site square patch loading artificial floor, realize
Height<0.05λ0Low section, and bandwidth also only have 5.6%；In the same year, Asem Al-Zoubi et al. are in periodical IEEE
Document is delivered on Transactions on Antenna and Propagation《A low-profile dual-band
surface wave antenna with a monopole-like pattern》, it is proposed that a double frequency surface-wave antenna,
Impedance bandwidth at resonant frequency is respectively 1.1% and 3.94%.It is existing to carry to overcome the shortcoming of surface-wave antenna narrow bandwidth
The method of high surface-wave antenna bandwidth, such as Cheolbok Kim in 2009 et al. are in IEEE Proceedings of the 39th
Document is delivered on European Microwave Conference《A wideband planar surface wave
antenna for WLAN router》, document proposition around the circular patch of apex drive by loading parasitic ring attaching
Piece carrys out broadening bandwidth, and antenna obtains 23.6% bandwidth and 5.91dBi gain using this method, but in surface-wave antenna
In, circular patch not radiating element equivalent to the exciting unit for producing surface wave improves microstrip antenna bandwidth using tradition
Method come improve the bandwidth of surface-wave antenna be obviously restricted even it is infeasible, according to conventional microstrip beamwidth of antenna broadening
Method improves the bandwidth of surface-wave antenna, may increase antenna size, thickness, difficulty of processing etc..Therefore, for improving table
The research tool of face wave antenna bandwidth is of great significance.
In summary, the problem of prior art is present be：The existing surface-wave antenna based on periodic structure is using uniform
Patch array, its narrower bandwidth limits its application in a wireless communication system.
The content of the invention
The problem of existing for prior art, the invention provides a kind of broadband table loaded based on non-homogeneous periodic structure
Face wave antenna.
The present invention is achieved in that a kind of wideband surface wave antenna loaded based on non-homogeneous periodic structure, the base
The wideband surface wave antenna loaded in non-homogeneous periodic structure includes：
The individual periodicity metal patch arrays equidistantly arranged of m × m, m >=3；
Periodicity metal patch array printing is in the upper surface of first medium substrate, the propagation for guiding surface ripple；
First medium substrate is located at the top of second medium substrate, and there is air dielectric, for being made using Air Coupling
Energy is converted into surface wave from circular patch；
Circular patch is printed on the upper surface of second medium substrate, for drive surface ripple；
Metal floor radius is less than second medium substrate, positioned at the lower surface of second medium substrate, for connecting coaxial spy
The crust of pin；
The inner wire connection circular patch of coaxial probe and the center of metal floor, for feeding.
Further, the periodic patches array includes the chip unit of m × m non-uniform size；The periodicity patch
The non-homogeneous taper change of m × m chip unit size of chip arrays, and positioned at the chip unit size of array center is smaller and position
It is larger in the unit size of array edges, for encouraging two modes of resonance to carry out broadening bandwidth simultaneously.
Further, the chip unit is along X-axis and Y direction odd symmetry, and the width of chip unit is from the w- close to X-axis
Taper change turns to w+2t successively by 2t, w-t, w+t, and the length of chip unit is from the w-2t close to Y-axis, w-t, and taper becomes w+t successively
W+2t is turned to, for encouraging TM simultaneously01And TM02The surface wave of mould；Wherein w and t is parameter.
Further, the first medium substrate is circular configuration with second medium substrate and radius is identical.
Further, the metal floor uses circular configuration, and radius is less than second medium substrate.
Advantages of the present invention and good effect are：Because the size of m × m periodic patches unit is non-homogeneous and from center
Less unit variation is the larger unit in edge, compared with the uniform period chip unit that existing surface-wave antenna is used,
Two adjacent modes of resonance can be motivated simultaneously, by merging the two modes of resonance, so as to the band of broadening antenna
It is wide.The present invention proposes a kind of surface-wave antenna using non-homogeneous cycle patch array, by encouraging two adjacent resonance
Pattern, the bandwidth of antenna has obtained the notable decorum.Meanwhile, fed using Air Coupling and reduction metal floor bandwidth is further
Obtain broadening.
There is certain air dielectric in the present invention, due to first medium substrate and second medium substrate with existing surface wave
The structure that antenna does not load air dielectric is compared, and feed element can provide wider impedance bandwidth using proximal air coupling.
The present invention is reduced due to the radius of metal floor, can increase the path of surface wave diffractional field, so that with broadband character.
Brief description of the drawings
Fig. 1 is the wideband surface wave antenna structural representation provided in an embodiment of the present invention loaded based on non-homogeneous periodic structure
Figure.
Fig. 2 is periodic patches array junctions composition provided in an embodiment of the present invention.
Fig. 3 is stickogram provided in an embodiment of the present invention.
Fig. 4 is gain curve figure provided in an embodiment of the present invention.
Fig. 5 is the antenna pattern at different frequent points provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the wideband surface wave antenna bag provided in an embodiment of the present invention loaded based on non-homogeneous periodic structure
Include m × m periodicity metal patch array 1, the first medium substrates 5 equidistantly arranged, circular patch 2, second medium substrate
6, metal floor 3 and coaxial probe 4, wherein m >=3, in the embodiment of the present invention, m selections are 8, the paster of periodic patches array 1
Unit is rectangle；Periodicity metal patch array 1 includes the m × m rectangular metal chip units heterogeneous equidistantly arranged,
Wherein this m × m non-homogeneous rectangular patch sizes in taper change, wherein positioned at the chip unit size of array center it is smaller and
Unit size positioned at array edges is larger, for encouraging two adjacent modes of resonance simultaneously；Periodicity metal patch array 1
The upper surface of first medium substrate 5 is printed on, the propagation for guiding surface ripple.First medium substrate 5 and second medium substrate 6
For circular configuration and radius is equal, first medium substrate 5 is located at the top of second medium substrate 6, and there is certain air and be situated between
Matter, for making energy be converted into surface wave from circular patch 2 using Air Coupling.First medium substrate 5 and second medium substrate 6
Opened hole on correspondence position, through bolt, for fixing first medium substrate 5.Circular patch 2 is printed on second medium substrate 6
Upper surface, for drive surface ripple.Metal floor 3 uses circular configuration, and its radius is less than second medium substrate 6, positioned at the
The lower surface of second medium substrate 6, the crust for connecting coaxial probe 4.The inner wire connection He of circular patch 2 of coaxial probe 4
The center of metal floor 3, for feeding.
As shown in Fig. 2 periodic patches array 1 includes the metal rectangular paster of 8 × 8 non-uniform sizes, paster spacing
From equal.Chip unit is along X-axis and Y direction odd symmetry, and the width of chip unit is from w-2t, w-t close to X-axis, and w+t is successively
Taper, which becomes, turns to w+2t, and the length of chip unit is from the w-2t close to Y-axis, w-t, and taper change turns to w+2t to w+t successively, for same
Shi Jili TM01And TM02The surface wave of mould.Wherein w and t is parameter.
The application effect of the present invention is explained in detail with reference to emulation.
The working frequency selection of the present invention is 5.37GHz.
1st, emulation content
1.1 utilize business simulation software High Frequency Structure Simulator HFSS ver.13) it is right
The reflectance factor of the wideband surface wave antenna of the embodiment of the present invention is emulated, as a result as shown in Figure 3.
The gain of the wideband surface wave antenna of 1.2 pairs of embodiment of the present invention is emulated, as a result as shown in Figure 4.
The side in E face and H face of the wideband surface wave antenna of 1.3 pairs of embodiment of the present invention at 4.8,5.37 and 5.95GHz
Simulation calculation is carried out to figure, as a result as shown in Figure 5.
2nd, simulation result
As shown in figure 3, two mode of operation TM of the present invention01And TM02Mould occurs at frequency 4.8GHz and 5.95GHz
Resonance, corresponding reflectance factor is respectively -15dB and -25dB.Antenna reflection coefficient be less than -10dB impedance band for 4.53~
6.21GHz, relative bandwidth is 31.3%.Prior art was pasted using uniform period patch array and with the non-homogeneous cycle of the present invention
Under chip arrays identical size, only encouraged a mode of resonance, resonant frequency is 5.2GHz, its impedance band be 4.84~
5.79GHz, relative bandwidth only has 17.8%；As can be seen that the present invention is compared with prior art, with broadband character.
As shown in figure 4, the antenna gain of the present invention is in the range of 4.53~5.75GHz of impedance band, gain is from 5.3dBi
7.16dBi is changed to, maximum gain is 7.6dBi, and average gain is 6.23dBi.Prior art is using uniform periodicity paster battle array
During row, the obtained maximum gain in impedance band is 6.94GHz, and average gain is 5.7dBi.As can be seen that of the invention and existing
There is technology to compare, with higher gain characteristic.
As shown in figure 5, the present invention is identical with 5.95GHz directional diagram polarization 4.8,5.37, E faces directional diagram axial direction
Null, main beam points to θ=30 ° direction, and H faces directional diagram has good omnidirectional's characteristic, meanwhile, the cross polarization in E faces and H faces
Less than main polarization -20dB or so.The directional diagram of the present invention is similar to vertical monopole.Therefore, the present invention has well similar
The radiation characteristic of monopole.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of wideband surface wave antenna loaded based on non-homogeneous periodic structure, it is characterised in that described to be based on non-homogeneous week
The wideband surface wave antenna of phase structure loading includes：
The individual periodicity metal patch arrays equidistantly arranged of m × m, m >=3；
Periodicity metal patch array printing is in the upper surface of first medium substrate, the propagation for guiding surface ripple；
First medium substrate is located at the top of second medium substrate, and there is air dielectric, for making energy using Air Coupling
Surface wave is converted into from circular patch；
Circular patch is printed on the upper surface of second medium substrate, for drive surface ripple；
Metal floor is located at the lower surface of second medium substrate, the crust for connecting coaxial probe；
The inner wire connection circular patch of coaxial probe and the center of metal floor, for feeding.
2. the wideband surface wave antenna as claimed in claim 1 loaded based on non-homogeneous periodic structure, it is characterised in that described
Periodic patches array includes the chip unit of m × m non-uniform size；M × m paster list of the periodic patches array
The change of elemental size non-homogeneous taper, and positioned at the chip unit size of array center is smaller and unit size positioned at array edges
It is larger, for encouraging two modes of resonance to carry out broadening bandwidth simultaneously.
3. the wideband surface wave antenna as claimed in claim 2 loaded based on non-homogeneous periodic structure, it is characterised in that described
Chip unit is along X-axis and Y direction odd symmetry, and the width of chip unit is from the w-2t close to X-axis, w-t, and taper becomes w+t successively
W+2t is turned to, the length of chip unit is from the w-2t close to Y-axis, w-t, and taper change turns to w+2t to w+t successively, for encouraging simultaneously
TM01And TM02The surface wave of mould；Wherein w and t is parameter.
4. the wideband surface wave antenna as claimed in claim 1 loaded based on non-homogeneous periodic structure, it is characterised in that described
First medium substrate is circular configuration with second medium substrate and radius is identical.
5. the wideband surface wave antenna as claimed in claim 1 loaded based on non-homogeneous periodic structure, it is characterised in that described
Metal floor uses circular configuration, and radius is less than second medium substrate.
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| CN201710365687.2A CN107275766B (en) | 2017-05-23 | 2017-05-23 | Broadband surface wave antenna based on non-uniform periodic structure loading |
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| CN201710365687.2A CN107275766B (en) | 2017-05-23 | 2017-05-23 | Broadband surface wave antenna based on non-uniform periodic structure loading |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108346862A (en) * | 2017-01-24 | 2018-07-31 | 原田工业株式会社 | Composite antenna apparatus |
| CN108718005A (en) * | 2018-04-20 | 2018-10-30 | 杭州电子科技大学 | Double resonance microwave absorber |
| CN109509990A (en) * | 2018-12-29 | 2019-03-22 | 四川睿迪澳科技有限公司 | All-metal FP cavity antenna based on choke groove and non-homogeneous coating |
| CN111430891A (en) * | 2020-03-13 | 2020-07-17 | 华南理工大学 | Broadband low-profile antenna based on polarization correlation super-surface structure |
| CN112640216A (en) * | 2018-08-27 | 2021-04-09 | 京瓷株式会社 | Resonant structure, antenna, wireless communication module, and wireless communication device |
| CN112928464A (en) * | 2021-02-05 | 2021-06-08 | 中山大学 | Multi-beam antenna without feed network and manufacturing method thereof |
| CN113745848A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Antenna, use method and communication base station |
| CN113889753A (en) * | 2021-09-18 | 2022-01-04 | 浙江大学 | Omnidirectional matching non-uniform energy receiving surface aiming at line source radiation |
| CN109509990B (en) * | 2018-12-29 | 2024-05-28 | 四川睿迪澳科技有限公司 | All-metal FP resonant cavity antenna based on choke groove and non-uniform covering layer |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108346862A (en) * | 2017-01-24 | 2018-07-31 | 原田工业株式会社 | Composite antenna apparatus |
| CN108346862B (en) * | 2017-01-24 | 2021-02-12 | 原田工业株式会社 | Composite antenna device |
| CN108718005A (en) * | 2018-04-20 | 2018-10-30 | 杭州电子科技大学 | Double resonance microwave absorber |
| CN112640216A (en) * | 2018-08-27 | 2021-04-09 | 京瓷株式会社 | Resonant structure, antenna, wireless communication module, and wireless communication device |
| CN109509990A (en) * | 2018-12-29 | 2019-03-22 | 四川睿迪澳科技有限公司 | All-metal FP cavity antenna based on choke groove and non-homogeneous coating |
| CN109509990B (en) * | 2018-12-29 | 2024-05-28 | 四川睿迪澳科技有限公司 | All-metal FP resonant cavity antenna based on choke groove and non-uniform covering layer |
| CN111430891A (en) * | 2020-03-13 | 2020-07-17 | 华南理工大学 | Broadband low-profile antenna based on polarization correlation super-surface structure |
| CN113745848A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Antenna, use method and communication base station |
| CN113745848B (en) * | 2020-05-29 | 2024-03-01 | 华为技术有限公司 | Antenna, using method and communication base station |
| CN112928464A (en) * | 2021-02-05 | 2021-06-08 | 中山大学 | Multi-beam antenna without feed network and manufacturing method thereof |
| CN112928464B (en) * | 2021-02-05 | 2022-07-22 | 中山大学 | Multi-beam antenna without feed network and manufacturing method thereof |
| CN113889753A (en) * | 2021-09-18 | 2022-01-04 | 浙江大学 | Omnidirectional matching non-uniform energy receiving surface aiming at line source radiation |
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