CN105591197B - A kind of low section, broadband, high-gain filter antenna - Google Patents
A kind of low section, broadband, high-gain filter antenna Download PDFInfo
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- CN105591197B CN105591197B CN201610116579.7A CN201610116579A CN105591197B CN 105591197 B CN105591197 B CN 105591197B CN 201610116579 A CN201610116579 A CN 201610116579A CN 105591197 B CN105591197 B CN 105591197B
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- electric unit
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- electromagnetism
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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
- H01Q1/48—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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
Abstract
The present invention discloses a kind of low section, broadband, high-gain filter antenna.Antenna includes the super surface emissivity body of electromagnetism and feed section.The super surface of the electromagnetism is made of electrical small cell heterogeneous, as efficient radiator, increases the bandwidth and gain of antenna.Radiation zero can be generated simultaneously, adjusts the degree of roll-offing of passband top edge, improve frequency selectivity.The antenna introduces metallic vias creatively using the microstrip coupled cutler feed of separation between micro-strip and floor, ensure that the good filter effect of low-frequency stop band, improves the degree of roll-offing of passband lower edge.The present invention creatively designs the super surface of electromagnetism with filter effect and applies it to filter antenna, and antenna structure is simple, and complicated filter circuit is not used, highly only 0.06 λ0, 10dB impedance bandwidth 28.4%, aerial loss is low, and efficiency is up to 95%, with interior average gain 8.2dBi.Out-of-band rejection is more than 20dB, has very wide stopband.
Description
Technical field
The present invention relates to the antenna in wireless mobile communications field, in particular to one kind can be applied to mobile communication base station etc. and penetrate
The low section of frequency terminal, broadband, high-gain filter antenna.
Background technique
In wireless communication system, the advantage that multifunctional circuit module is small with its size, overall performance is good is received significant attention.
Antenna and filter are two indispensable elements of radio-frequency front-end.In general, antenna and filter are carried out as two elements
Then they are respectively matched to 50 Ω standard ports, then the two are cascaded by independent design.So that making entire module
Size increases, this radio-frequency front-end limited for space is unfavorable.Again since the bandwidth of filter and antenna has been frequently not
It is complete consistent, cause filter effect to be affected.And the loss of filter is again inevitable, often leads to entire module radiation
Efficiency reduces, and the gain of antenna is relatively low.In order to overcome these problems, filter and antenna set become a module and are mentioned
Out.
The Integrated Solution of wavenumber filter and antenna selects collaborative design, antenna and filter in this scheme mostly now
It is directly connected to, without being respectively matched to 50 Ω standard ports again.Collaborative design reduces module size, avoids the standard of being matched to
Loss caused by port.Although the collaborative design of filter and antenna improves module performance to a certain extent, due to
The loss of filter is inevitable, causes antenna gain relatively low.Especially for the Wide-Band Design, multistage resonator is needed,
It is more serious to often lead to loss.
Few Antenna Designs can have preferable filter effect not use complicated filter circuit again at this stage.This
Outside, many applications need filter antenna to have wider bandwidth and relatively high gain.
Summary of the invention
The present invention overcomes the shortcomings of the prior art to provide one using the theory of filter and antenna Combined design
Kind can be applied to low section, the broadband, high-gain filter antenna of the rf terminals such as mobile communication base station.
The purpose of the present invention is realized at least through one of following technical solution.
A kind of low section, broadband, high-gain filter antenna comprising table on first medium substrate and first medium substrate
The radiator of facet etch, the floor between first medium substrate and second medium substrate, second medium substrate and second medium
The fed microstrip of base lower surface etching；Radiator uses the super surface texture of electromagnetism；Constitute the electric unit quantity on the super surface of electromagnetism
For Nx×Ny, electric unit is by rectangular coordinate system x, y arrangement, Nx,NyRespectively represent rectangular co-ordinate x, the electric unit number in the direction y, Nx
Take positive integer, NyTake the even number more than or equal to 4, size disunity between the electric unit on y-axis direction, in outside electric unit ratio
Size is big in the y-axis direction for side electric unit；For NyWhen=4, the length of outside electric unit is 1~2 times of inside electric unit；Position
In the lower section at radiator center, floor center along the x-axis direction, have the gap for being separated into two sections, two sections of gaps it
Between spacing it is adjustable, inhibit low-frequency resonant；Two sections of gap total lengths are about the half of centre frequency corresponding wavelength；Gap uses
Step structure obtains better impedance matching；The lower surface of second medium substrate etches microstrip line cruciferous；Metal mistake
Hole connects fed microstrip and floor, this structure can generate radiation zero at low frequency pass band edge；Apart from fed microstrip end about 1/4
λgPosition stretch out minor matters, minor matters length is adjustable, this structure can inhibit high-frequency resonant.
Further, the electric unit shape on the super surface of the electromagnetism is rectangle, circle, ellipse, ring-type or equivalent
Deformation.
Further, electromagnetism is surpassed surface to be applied in filter antenna, using the inconsistent electric unit of size, outside radiator
The electric unit of side is bigger than the electric unit size of inside in one direction, and different sizes is used to adjust the frequency of radiation zero
Rate adjusts the degree of roll-offing of passband top edge.
Further, the gap can also be divided into multistage gap, inhibit low-frequency resonant.
Further, total side length of all electric units in the super surface of electromagnetism is the corresponding wavelength of center frequency, passes through electric unit
Size and its spacing to adjust resonance frequency, and then control bandwidth.
Further, metallization VIA is introduced between fed microstrip and floor, introduces radiation zero.
Further, cross-shaped structure is used in fed microstrip end, inhibits high-frequency resonant.
A kind of low section of the invention, broadband, high-gain filter antenna, radiator uses the super surface texture of electromagnetism, electric
The inside and outside unit on the super surface of magnetic is uneven.External unit is bigger than internal element size in one direction, vertical at another
Size may be the same or different on direction.The super surface of the electromagnetism can control the position of radiation zero, adjust passband top edge
Degree of roll-offing.Feed section is made of the microstrip coupled gap separated, there is a metallic vias, the feed between micro-strip and floor
Structure ensure that the filter effect of low frequency part.The microstrip line uses cross shape, and the minor matters that micro-strip side is stretched out inhibit high
Frequency resonance.
Related published antenna patent of invention and patent of invention, all do not adopt and realize filter effect with the aforedescribed process.On
Method is stated, for realizing that filter antenna has novelty, innovation and practicality.
Compared with prior art, the invention has the following beneficial effects:
1. realize the filter antenna with height frequency selectivity using the super surface of electromagnetism, structure simply, easy processing；
2. filter effect is fused in Antenna Design, while it being not introduced into complicated filter circuit, aerial loss is low, efficiency
It is high；
3. the filter antenna has the characteristics that low section, broadband, high-gain.Antenna integral thickness~0.06 λ0, 10dB
Impedance bandwidth 28.4%, individual antenna average gain 8.2dBi.
Detailed description of the invention
Fig. 1 is the side view of filter antenna specific embodiment of the present invention；
Fig. 2 is the top view of the radiator of filter antenna specific embodiment of the present invention；
Fig. 3 is the schematic diagram on the floor of filter antenna specific embodiment of the present invention；
Fig. 4 is the schematic diagram of the feed circuit of filter antenna specific embodiment of the present invention；
Fig. 5 is the S of filter antenna specific embodiment of the present invention11The emulation of parameter and test curve figure.
Fig. 6 is the gain emulation testing curve graph and efficiency test curve graph of filter antenna specific embodiment of the present invention；
Fig. 7 is normalization antenna pattern of the filter antenna specific embodiment of the present invention in 5GHz.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out clear, detailed explanation to technical detail of the invention,
Described embodiment is only the section Example in the present invention, instead of all the embodiments.Based on the embodiment of the present invention,
Those of ordinary skill in the art's other embodiments obtained without making creative work, belong to the present invention
Protection scope.
A kind of work of the embodiment of the present invention is in the low section of 5GHz, broadband, high-gain filter antenna.Refering to fig. 1, this implementation
For the radiator 1 of example using thickness h=3mm F4T as first medium substrate 2, feed layer below uses thickness h1=
The RO4003 of 0.813mm is as second medium substrate 4, whole height~3.813mm, and section is low.Referring to Fig.2, the present embodiment
Radiator uses the super surface texture of electromagnetism.The electrical small cell size for constituting the super surface of electromagnetism is inconsistent.The ratio of outer cells 6 inside is single
Size is big in the y-axis direction for member 7, and the length of outer cells 6 is 1~2 times of inside cell 7, preferably 1~1.5 times.Unit number
The selection of amount also has biggish freedom degree, can choose Nx×Ny(Nx,NyRespectively represent x, the electric unit number in the direction y, NxIt takes just
Integer, NyTake the even number more than or equal to 4).The present embodiment uses Unit 4 × 4, unit overall length about λg, unit size and spacing
Adjustable resonance frequency, and then control bandwidth.Cell configuration also has biggish freedom degree, and the present embodiment uses simplest length
It is rectangular.The size of one optimization: inside cell 9.7mm × 9.7mm, outer cells 9.7mm × 13.6mm, cell spacing are uniformly adopted
Use 0.9mm.
Refering to Fig. 3, the floor 3 of the present embodiment, i.e. feed layer upper surface.Floor center have one by isolated gap 9,
Gap spacing is adjustable, inhibits low-frequency resonant.The present embodiment gap spacing uses 1mm.About half of two parts gap total length
Wavelength.Gap obtains better impedance matching using step structure.Refering to Fig. 4, the second medium substrate 4 of the present embodiment
Lower surface, criss-cross feeding microstrip line 5.There is a metallic vias 8 between micro-strip and floor, can be generated at low frequency pass band edge
Radiation zero.Apart from about 1/4 λ of fed microstrip endgPosition stretch out minor matters 10, minor matters adjustable in length, inhibit high-frequency resonant.
Referring to Fig. 5, emulation of the embodiment of the present invention and test | S11| parameter more coincide, test result high frequency section slightly
Micro- to have frequency deviation, this may be between specific mismachining tolerance and two-ply caused by air gap.The 10dB impedance bandwidth of test is
28.4%, stopband | S11| close to 0.Referring to Fig. 6, emulation of the embodiment of the present invention coincide compared with the gain curve of test, test
Average gain 8.2dBi in passband, and have very high degree of roll-offing in passband edges, Out-of-band rejection is more than in very wide stopband
There is preferable filter effect within the scope of 20dBi, 0~10GHz.The band internal efficiency of the embodiment of the present invention is up to 95%.Refering to Fig. 7,
The normalized radiation pattern of centre frequency 5GHz.Greatest irradiation direction is main polarization bigger than cross polarization in the surface of radiator
25dBi or more.The directional diagram of other frequencies is similar with the directional diagram of 5GHz in passband, and directional diagram is more stable in entire passband.
Embodiment provided by the invention is applied to wireless mobile communications field, can be applied to connecing for various types of wireless communication systems
It receives and emits in equipment, benefit from the present invention and Antenna Design and filter design combine together, it is available simpler
Modular structure, it is easy to process, the complexity and cost of radio-frequency front-end are reduced, the overall performance of module is improved.
It is that retouching in detail for super the provided specific embodiment of surface filtering antenna wirelessly communicated is provided to the present invention above
It states.Present embodiment is illustrated design of the invention, principle and embodiment with specific embodiment, and help understands this
The invention and its core concept of invention.It is only in summary preferred embodiments of the invention, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, made any modification, equivalent replacement, simplification, improvement etc., should be included in the present invention
Protection scope within.
Claims (7)
1. a kind of low section, broadband, high-gain filter antenna, it is characterised in that be situated between including first medium substrate (2) and first
The radiator (1) of matter substrate (2) upper surface etching, the floor (3) between first medium substrate (2) and second medium substrate (4),
The fed microstrip (5) of second medium substrate (4) and second medium substrate (4) following table facet etch；Radiator uses the super table of electromagnetism
Face structure；The electric unit quantity for constituting the super surface of electromagnetism is Nx×Ny, electric unit is by rectangular coordinate system x, y arrangement, Nx, NyPoint
Rectangular co-ordinate x, the electric unit number in the direction y, N are not representedxTake positive integer, NyTake the even number more than or equal to 4, y-axis direction
On electric unit between size disunity, outside electric unit (6) than inside electric unit (7) in the y-axis direction size it is big；For Ny
When=4, the length of outside electric unit (6) is 1 ~ 2 times of inside electric unit (7)；Positioned at the lower section at radiator center, on floor
Along the x-axis direction, there is the gap for being separated into two sections in center, and the spacing between two sections of gaps is adjustable, inhibits low frequency humorous
Vibration；Two sections of gap total lengths are about the half of centre frequency corresponding wavelength；Gap obtains better impedance using step structure
Matching；The lower surface of second medium substrate (4) etches microstrip line (5) cruciferous；Metallic vias (8) connects fed microstrip
(5) and floor (3), this structure can generate radiation zero at low frequency pass band edge；Apart from about 1/4 λ of fed microstrip endgPosition
It sets and stretches out minor matters (10), minor matters length is adjustable, this structure can inhibit high-frequency resonant.
2. a kind of low section according to claim 1, broadband, high-gain filter antenna, it is characterised in that the electromagnetism is super
The electric unit shape on surface is rectangle, circle, ellipse, ring-type or equivalent deformation.
3. low section according to claim 1, broadband, high-gain filter antenna, which is characterized in that electromagnetism is surpassed surface and is answered
It uses in filter antenna, using the inconsistent electric unit of size, the outside electric unit of radiator is in one direction than inside electricity
Unit size is big, and different sizes is used to adjust the frequency of radiation zero, adjusts the degree of roll-offing of passband top edge.
4. low section according to claim 1, broadband, high-gain filter antenna, which is characterized in that the gap can also be by
It is divided into multistage gap, inhibits low-frequency resonant.
5. low section according to claim 1, broadband, high-gain filter antenna, which is characterized in that the super surface of electromagnetism is all
Total side length of electric unit is the corresponding wavelength of center frequency, by the size and its spacing of electric unit to adjust resonance frequency, into
And control bandwidth.
6. low section according to claim 1, broadband, high-gain filter antenna, which is characterized in that in fed microstrip and ground
Metallization VIA is introduced between plate, introduces radiation zero.
7. low section according to claim 1, broadband, high-gain filter antenna, which is characterized in that in fed microstrip end
Using cross-shaped structure, inhibit high-frequency resonant.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610116579.7A CN105591197B (en) | 2016-02-29 | 2016-02-29 | A kind of low section, broadband, high-gain filter antenna |
| PCT/CN2017/072786 WO2017148237A1 (en) | 2016-02-29 | 2017-01-27 | Low profile, broadband and high-gain filter antenna |
| US15/554,714 US10008781B1 (en) | 2016-02-29 | 2017-01-27 | Low-profile broadband high-gain filtering antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610116579.7A CN105591197B (en) | 2016-02-29 | 2016-02-29 | A kind of low section, broadband, high-gain filter antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN105591197A CN105591197A (en) | 2016-05-18 |
| CN105591197B true CN105591197B (en) | 2019-07-16 |
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| CN201610116579.7A Active CN105591197B (en) | 2016-02-29 | 2016-02-29 | A kind of low section, broadband, high-gain filter antenna |
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| US10008781B1 (en) | 2016-02-29 | 2018-06-26 | South China University Of Technology | Low-profile broadband high-gain filtering antenna |
| CN106684548A (en) * | 2017-01-06 | 2017-05-17 | 华南理工大学 | Low profile broadband high gain filter antenna |
| CN105870623A (en) * | 2016-06-07 | 2016-08-17 | 电子科技大学 | Broadband circular polarization high-gain low-profile microstrip slot antenna capable of loading hyper-surface |
| CN106450737B (en) * | 2016-11-25 | 2023-07-18 | 华南理工大学 | Omnidirectional low-profile filtering patch antenna |
| CN107834212B (en) * | 2017-10-13 | 2020-07-31 | 南京理工大学 | High-gain high-order die cavity array antenna based on novel super surface |
| CN109888480B (en) * | 2018-10-11 | 2020-12-25 | 南京理工大学 | Broadband multi-resonance super-surface antenna based on non-periodic square ring structure |
| CN111129747B (en) * | 2018-10-30 | 2022-06-28 | 天津大学青岛海洋技术研究院 | Broadband low-profile microstrip antenna based on area aperture mode |
| CN109524788B (en) * | 2018-11-05 | 2020-09-22 | 华南理工大学 | Broadband low-profile filtering antenna based on super-surface structure |
| CN109687113A (en) * | 2019-01-22 | 2019-04-26 | 西安电子科技大学 | Filter, dielectric resonant aerial with biradial zero |
| CN111509373B (en) * | 2019-01-30 | 2021-04-20 | 华中科技大学 | Slot-coupled broadband filtering antenna |
| CN109728435B (en) * | 2019-02-28 | 2024-03-22 | 安徽大学 | Encoding electrically adjustable broadband orbital angular momentum mode reconfigurable antenna |
| CN112886231A (en) * | 2019-11-30 | 2021-06-01 | 华为终端有限公司 | Antenna and terminal equipment |
| CN112086754B (en) * | 2020-09-14 | 2021-09-07 | 电子科技大学 | Low-profile filtering antenna based on super-surface structure |
| CN112332087B (en) * | 2020-10-29 | 2022-05-27 | 杭州电子科技大学 | Differential feed circular polarization filtering antenna based on super surface structure |
| CN112701489B (en) * | 2020-12-14 | 2022-04-12 | 深圳大学 | Band-pass frequency selection surface structure based on antenna-filter-antenna |
| CN112736473B (en) * | 2020-12-30 | 2021-11-23 | 浙江大学 | Low-profile antenna with adjustable radiation characteristic |
| CN113300735A (en) * | 2021-05-10 | 2021-08-24 | Tcl通讯（宁波）有限公司 | Radio frequency antenna device, radio frequency antenna device signal receiving method and mobile terminal |
| CN115441205B (en) * | 2022-11-09 | 2023-03-10 | 广东工业大学 | High-gain broadband circularly polarized filter antenna based on super surface and communication equipment |
| CN117394027B (en) * | 2023-12-12 | 2024-03-08 | 华南理工大学 | Dual-frequency self-isolation in-band full-duplex super-surface antenna and design method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007127955A3 (en) * | 2006-04-27 | 2008-11-13 | Rayspan Corp | Antennas, devices and systems based on metamaterial structures |
| CN104103906A (en) * | 2014-08-01 | 2014-10-15 | 东南大学 | Low-cost microwave- and millimeter-wave polarized antenna of multi-layer PCB (Printed circuit board) process |
| CN205406719U (en) * | 2016-02-29 | 2016-07-27 | 华南理工大学 | Low section, broadband, high -gain filtering antenna |
-
2016
- 2016-02-29 CN CN201610116579.7A patent/CN105591197B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007127955A3 (en) * | 2006-04-27 | 2008-11-13 | Rayspan Corp | Antennas, devices and systems based on metamaterial structures |
| CN104103906A (en) * | 2014-08-01 | 2014-10-15 | 东南大学 | Low-cost microwave- and millimeter-wave polarized antenna of multi-layer PCB (Printed circuit board) process |
| CN205406719U (en) * | 2016-02-29 | 2016-07-27 | 华南理工大学 | Low section, broadband, high -gain filtering antenna |
Non-Patent Citations (2)
| Title |
|---|
| High-Gain Filtering Patch AntennaWithout Extra Circuit;Xiu Yin Zhang, Wen Duan, and Yong-Mei Pan;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20151231;第63卷(第12期);第5883-5888页 |
| Metamaterial-Based Low-Profile Broadband Aperture-Coupled Grid-Slotted Patch Antenna;Wei Liu, Zhi Ning Chen, and Xianming Qing;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20150730;第63卷(第7期);第3325-3329页 |
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