CN105591197A - Filtering antenna with low profile, wide band and high gain - Google Patents
Filtering antenna with low profile, wide band and high gain Download PDFInfo
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- CN105591197A CN105591197A CN201610116579.7A CN201610116579A CN105591197A CN 105591197 A CN105591197 A CN 105591197A CN 201610116579 A CN201610116579 A CN 201610116579A CN 105591197 A CN105591197 A CN 105591197A
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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
- 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
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Abstract
The invention discloses a filtering antenna with low profile, wide band and high gain. The antenna comprises an electromagnetic super-surface radiator and a feed part. The electromagnetic super-surface is constituted by non-uniformly small electrical units and is used as a high-efficiency radiator so that the bandwidth and gain of antenna are increased. At the same time, radiation zero points can be produced, and frequency selectivity can be increased through adjusting roll-off degree of an upper edge of a pass-band. According to the antenna, discrete micro-strip coupling slits are creatively used for feeding; metal via holes are introduced in between the micro-strip and floor; good filtering effect of low frequency stop band is guaranteed; roll-off degree of pass-band lower edges is increased. According to the invention, electromagnetic super-surface with filtering effect is creatively designed and is applied in filtering antenna; the antenna structure is simple and no complicated filtering circuit is used; The height is only 0.06[lambda]0; 10dB impedance bandwidth is 28.4%; antenna loss is low and efficiency reaches up to 95%; in-band average gain is 8.2dBi; out-band rejection is over 20dB; the stop-band is wide.
Description
Technical field
The present invention relates to the antenna in wireless mobile communications field, particularly a kind of low section, broadband, high-gain filter antenna that can be applicable to the rf terminals such as mobile communication base station.
Background technology
In wireless communication system, the advantage that multifunctional circuit module is little with its size, overall performance is good is subject to extensive concern. Antenna and wave filter are two indispensable elements of radio-frequency front-end. Conventionally, antenna and wave filter are to carry out independent design as two elements, then they are matched respectively to 50 Ω standard port, then by the two cascade. So, whole module size is increased, this radio-frequency front-end for limited space is disadvantageous. Because the bandwidth of wave filter and antenna is not often on all four, cause filter effect to be affected again. And the loss of wave filter is inevitable again, often cause whole module radiation efficiency to reduce, the gain of antenna is relatively low. In order to overcome these problems, wave filter and antenna are integrated into a module and are suggested.
The Integrated Solution of present most of wave filter and antenna is selected collaborative design, and in this scheme, antenna is directly connected with wave filter, need not match respectively 50 Ω standard port again. Collaborative design has reduced module size, has avoided matching the loss that standard port causes. Although the collaborative design of wave filter and antenna has improved module performance to a certain extent, because the loss of wave filter is inevitable, cause antenna gain relatively low. Particularly, for the Wide-Band Design, need multistage resonator, often cause loss more serious.
Present stage seldom has Antenna Design can have good filter effect not use again complicated filter circuit. In addition, a lot of application need filter antenna to have wider bandwidth and relatively high gain.
Summary of the invention
The present invention has overcome the deficiency that prior art exists, and adopts wave filter and antenna to merge the theory of design, and a kind of low section, broadband, high-gain filter antenna that can be applicable to the rf terminals such as mobile communication base station is provided.
Object of the present invention realizes one of at least by following technical solution.
A kind of low section, broadband, high-gain filter antenna, it comprises first medium substrate and the etched radiant body of first medium upper surface of base plate, floor between first medium substrate and second medium substrate, second medium substrate and the micro-band of the etched feed of second medium base lower surface; Radiant body adopts the super surface texture of electromagnetism; Forming the super surperficial electric unit quantity of electromagnetism is Nx×Ny, electric unit is by rectangular coordinate system x, and y arranges, Nx,NyRepresent respectively rectangular co-ordinate x, the electric unit number of y direction, NxGet positive integer, NyGet the even number that is more than or equal to 4, big or small disunity between the electric unit on y direction of principal axis, outside electric unit is larger than inner side electric unit size on y direction of principal axis; For Ny=4 o'clock, the length of outside electric unit was 1～2 times of inner side electric unit; Be positioned at the below at radiant body center, along x direction of principal axis, have one to be separated into the gap of two sections in floor central authorities, the spacing between two sections of gaps is adjustable, suppresses low-frequency resonant; Two sections of gap total lengths are about the half of centre frequency corresponding wavelength; Gap adopts step structure to obtain better impedance matching; The lower surface etching microstrip line cruciferous of second medium substrate; Metallic vias connects the micro-band of feed and floor, and this structure can produce at low frequency pass band edge radiation zero; Apart from the micro-end of tape of feed approximately 1/4 λgPosition stretch out minor matters, minor matters length is adjustable, this structure can suppress high-frequency resonant.
Further, the super surperficial electric unit of described electromagnetism is shaped as rectangle, circle, ellipse, ring-type or equivalent deformation.
Further, super electromagnetism surface applications, in filter antenna, is adopted to the inconsistent electric unit of size, and the electric unit in radiant body outside is larger than the electric unit size of inner side in one direction, its different size is used for regulating the frequency of radiation zero, regulates the degree of roll-offing of passband top edge.
Further, described gap can also be divided into multistage gap, suppresses low-frequency resonant.
Further, wavelength corresponding to frequency centered by total length of side of the super surperficial all electric units of electromagnetism, the size by electric unit and its spacing to be to regulate resonant frequency, and then control bandwidth.
Further, between the micro-band of feed and floor, introduce metallization via hole, introduce radiation zero.
Further, adopt decussate texture at the micro-end of tape of feed, suppress high-frequency resonant.
The filter antenna of a kind of low section of the present invention, broadband, high-gain, radiant body adopts the super surface texture of electromagnetism, and the super surperficial inside and outside unit of electromagnetism is inhomogeneous. External unit is larger than internal element size in one direction, and in another vertical direction, size can be identical or different. The position of radiation zero can be controlled in the super surface of described electromagnetism, regulates the degree of roll-offing of passband top edge. Feed part is made up of the microstrip coupled gap separating, and has a metallic vias between micro-band and floor, and described feed structure has ensured the filter effect of low frequency part. Described microstrip line adopts cross shape, and micro-minor matters of stretching out with side suppress high-frequency resonant.
Relevant published antenna patent of invention and patent of invention, all do not adopt above-mentioned method to realize filter effect. Said method, is used for realizing filter antenna and has novelty, novelty and practicality.
Compared with prior art, the present invention has following beneficial effect:
1. adopt the super surface of electromagnetism to realize the filter antenna with height frequency selectivity, simple in structure, easily processing;
2. filter effect is fused in Antenna Design, does not introduce complicated filter circuit, aerial loss is low simultaneously, and efficiency is high;
3. described in, filter antenna has the feature of low section, broadband, high-gain. Antenna integral thickness～0.06 λ0, 10dB impedance bandwidth 28.4%, individual antenna average gain 8.2dBi.
Brief description of the drawings
Fig. 1 is the side view of filter antenna specific embodiment of the present invention;
Fig. 2 is the top view of the radiant body 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 gain emulation testing curve map and the efficiency test curve map of filter antenna specific embodiment of the present invention;
Fig. 7 is the normalization antenna pattern of filter antenna specific embodiment of the present invention at 5GHz.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, ins and outs of the present invention are carried out to clear, detailed explanation, described embodiment is only the part embodiment in the present invention, instead of whole embodiment. Based on embodiments of the invention, other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belong to protection scope of the present invention.
A kind of low section, broadband, high-gain filter antenna that is operated in 5GHz of the embodiment of the present invention. Consult Fig. 1, the radiant body 1 of the present embodiment adopts the F4T of thickness h=3mm as first medium substrate 2, and feed layer below adopts thickness h1The RO4003 of=0.813mm is as second medium substrate 4, whole height～3.813mm, and section is low. Consult Fig. 2, the radiant body of the present embodiment adopts the super surface texture of electromagnetism. Form the super surperficial electrical small cell size of electromagnetism inconsistent. Outer side unit 6 is larger than interior side unit 7 size on y direction of principal axis, and the length of outer side unit 6 is 1～2 times of interior side unit 7, preferably 1～1.5 times. The selection of element number also has the larger free degree, can select Nx×Ny(Nx,NyRepresent respectively x, the electric unit number of y direction, NxGet positive integer, NyGet the even number that is more than or equal to 4). The present embodiment adopts Unit 4 × 4, the about λ of unit overall lengthg, unit size and spacing can regulate resonant frequency, and then control bandwidth. Cell configuration also has the larger free degree, and the present embodiment adopts the simplest rectangle. The size of an optimization: interior side unit 9.7mm × 9.7mm, outer side unit 9.7mm × 13.6mm, the unified 0.9mm. that adopts of unit interval
Consult Fig. 3, the floor 3 of the present embodiment, i.e. feed layer upper surface. Have a separated gap 9 in floor central authorities, gap spacing is adjustable, suppresses low-frequency resonant. The present embodiment gap spacing adopts 1mm. The about half wavelength of two parts gap total length. Gap adopts step structure in order to obtain better impedance matching. Consult Fig. 4, the lower surface of the second medium substrate 4 of the present embodiment, criss-cross feed microstrip line 5. Between micro-band and floor, there is a metallic vias 8, can produce at low frequency pass band edge radiation zero. Apart from the micro-end of tape of feed approximately 1/4 λgPosition stretch out minor matters 10, minor matters adjustable in length, suppress high-frequency resonant.
With reference to Fig. 5, embodiment of the present invention simulate and test | S11| parameter is comparatively identical, and test result has frequency deviation a little at HFS, and this may be between concrete mismachining tolerance and two-ply due to air gap. The 10dB impedance bandwidth of test is 28.4%, stopband | S11| close to 0. With reference to Fig. 6, the gain curve of embodiment of the present invention simulate and test is more identical, average gain 8.2dBi in test passband, and have very high degree of roll-offing at passband edge, in very wide stopband, Out-of-band rejection exceedes 20dBi, has good filter effect within the scope of 0～10GHz. The band internal efficiency of the embodiment of the present invention is up to 95%. Consult Fig. 7, the normalized radiation pattern of centre frequency 5GHz. Greatest irradiation direction is directly over radiant body, more than the large 25dBi of main polarization ratio cross polarization. In passband, the directional diagram of other frequencies and the directional diagram of 5GHz are similar, and in whole passband, directional diagram is more stable.
Embodiment provided by the invention is applied to wireless mobile communications field, can be applicable in the reception and transmitter of various types of wireless communication systems, benefiting from the present invention combines Antenna Design and design of filter together, can obtain more simple modular structure, be easy to processing, reduce complexity and the cost of radio-frequency front-end, improved the overall performance of module.
It is more than the detailed description that the present invention is applied to the super surface filtering specific embodiment that antenna provides of radio communication. Present embodiment has used specific embodiment to set forth design of the present invention, principle and embodiment, helps to understand invention of the present invention and core concept thereof. Be only in sum preferred embodiments of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, simplification, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a low section, broadband, high-gain filter antenna, it is characterized in that comprising first medium substrate (2) and the etched radiant body of first medium substrate (2) upper surface (1), floor (3) between first medium substrate (2) and second medium substrate (4), second medium substrate (4) and the micro-band of the etched feed of second medium substrate (4) lower surface (5); Radiant body adopts the super surface texture of electromagnetism; Forming the super surperficial electric unit quantity of electromagnetism is Nx×Ny, electric unit is by rectangular coordinate system x, and y arranges, Nx,NyRepresent respectively rectangular co-ordinate x, the electric unit number of y direction, NxGet positive integer, NyGet the even number that is more than or equal to 4, big or small disunity between the electric unit on y direction of principal axis, outside electric unit (6) is larger than inner side electric unit (7) size on y direction of principal axis; For Ny=4 o'clock, the length of outside electric unit (6) was 1 ~ 2 times of inner side electric unit (7); Be positioned at the below at radiant body center, along x direction of principal axis, have one to be separated into the gap of two sections in floor central authorities, the spacing between two sections of gaps is adjustable, suppresses low-frequency resonant; Two sections of gap total lengths are about the half of centre frequency corresponding wavelength; Gap adopts step structure to obtain better impedance matching; The lower surface etching microstrip line cruciferous (5) of second medium substrate (4); Metallic vias (8) connects the micro-band of feed (5) and floor (3), and this structure can produce at low frequency pass band edge radiation zero; Apart from the micro-end of tape of feed approximately 1/4 λgPosition stretch out minor matters (10), minor matters length is adjustable, this structure can suppress high-frequency resonant.
2. the low section of one according to claim 1, broadband, high-gain filter antenna, is characterized in that the super surperficial electric unit of described electromagnetism is shaped as rectangle, circle, ellipse, ring-type or equivalent deformation.
3. low section according to claim 1, broadband, high-gain filter antenna, it is characterized in that, by super electromagnetism surface applications in filter antenna, adopt the inconsistent electric unit of size, the electric unit in radiant body outside is larger than the electric unit size of inner side in one direction, its different size is used for regulating the frequency of radiation zero, regulates the degree of roll-offing of passband top edge.
4. low section according to claim 1, broadband, high-gain filter antenna, is characterized in that, described gap can also be divided into multistage gap, suppresses low-frequency resonant.
5. low section according to claim 1, broadband, high-gain filter antenna, it is characterized in that, wavelength corresponding to frequency centered by total length of side of the super surperficial all electric units of electromagnetism, the size by electric unit and its spacing to be to regulate resonant frequency, and then control bandwidth.
6. low section according to claim 1, broadband, high-gain filter antenna, is characterized in that, introduces metallization via hole between the micro-band of feed and floor, introduces radiation zero.
7. low section according to claim 1, broadband, high-gain filter antenna, is characterized in that, adopts decussate texture at the micro-end of tape of feed, suppresses 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 |
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| CN201610116579.7A CN105591197B (en) | 2016-02-29 | 2016-02-29 | A kind of low section, broadband, high-gain filter antenna |
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| CN105591197A true CN105591197A (en) | 2016-05-18 |
| CN105591197B CN105591197B (en) | 2019-07-16 |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN106450737A (en) * | 2016-11-25 | 2017-02-22 | 华南理工大学 | Omni-directional low-profile filter patch antenna |
| CN106684548A (en) * | 2017-01-06 | 2017-05-17 | 华南理工大学 | Low profile broadband high gain filter antenna |
| WO2017148237A1 (en) * | 2016-02-29 | 2017-09-08 | 华南理工大学 | Low profile, broadband and high-gain filter antenna |
| CN107834212A (en) * | 2017-10-13 | 2018-03-23 | 南京理工大学 | High-gain high order cavity array antenna based on new super surface |
| CN109524788A (en) * | 2018-11-05 | 2019-03-26 | 华南理工大学 | A kind of broadband low section filter antenna based on super surface texture |
| CN109687113A (en) * | 2019-01-22 | 2019-04-26 | 西安电子科技大学 | Filter, dielectric resonant aerial with biradial zero |
| CN109728435A (en) * | 2019-02-28 | 2019-05-07 | 安徽大学 | A kind of electric adjustable wide-band orbital angular momentum mode reconfigurable antenna of coding |
| CN109888480A (en) * | 2018-10-11 | 2019-06-14 | 南京理工大学 | The super skin antenna of broadband multi-resonant based on aperiodic side's ring structure |
| CN111129747A (en) * | 2018-10-30 | 2020-05-08 | 天津大学青岛海洋技术研究院 | Broadband low-profile microstrip antenna based on area aperture mode |
| CN111509373A (en) * | 2019-01-30 | 2020-08-07 | 华中科技大学 | Slot-coupled broadband filtering antenna |
| CN112086754A (en) * | 2020-09-14 | 2020-12-15 | 电子科技大学 | Low-profile filtering antenna based on super-surface structure |
| CN112332087A (en) * | 2020-10-29 | 2021-02-05 | 杭州电子科技大学 | Differential feed circular polarization filtering antenna based on super surface structure |
| CN112701489A (en) * | 2020-12-14 | 2021-04-23 | 深圳大学 | Band-pass frequency selection surface structure based on antenna-filter-antenna |
| CN112736473A (en) * | 2020-12-30 | 2021-04-30 | 浙江大学 | Low-profile antenna with adjustable radiation characteristic |
| CN112886231A (en) * | 2019-11-30 | 2021-06-01 | 华为终端有限公司 | Antenna and terminal equipment |
| 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 |
| CN115441205A (en) * | 2022-11-09 | 2022-12-06 | 广东工业大学 | High-gain broadband circularly polarized filtering antenna based on super surface and communication equipment |
| CN117394027A (en) * | 2023-12-12 | 2024-01-12 | 华南理工大学 | Dual-frequency self-isolation in-band full-duplex super-surface antenna and design method thereof |
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| WO2017148237A1 (en) * | 2016-02-29 | 2017-09-08 | 华南理工大学 | Low profile, broadband and high-gain filter antenna |
| US10008781B1 (en) | 2016-02-29 | 2018-06-26 | South China University Of Technology | Low-profile broadband high-gain filtering 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 |
| CN106450737A (en) * | 2016-11-25 | 2017-02-22 | 华南理工大学 | Omni-directional low-profile filter patch antenna |
| CN106684548A (en) * | 2017-01-06 | 2017-05-17 | 华南理工大学 | Low profile broadband high gain filter antenna |
| CN107834212A (en) * | 2017-10-13 | 2018-03-23 | 南京理工大学 | High-gain high order cavity array antenna based on new super surface |
| 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 |
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| CN109524788A (en) * | 2018-11-05 | 2019-03-26 | 华南理工大学 | A kind of broadband low section filter antenna based on super surface texture |
| CN109687113A (en) * | 2019-01-22 | 2019-04-26 | 西安电子科技大学 | Filter, dielectric resonant aerial with biradial zero |
| CN111509373A (en) * | 2019-01-30 | 2020-08-07 | 华中科技大学 | Slot-coupled broadband filtering antenna |
| 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 |
| CN109728435A (en) * | 2019-02-28 | 2019-05-07 | 安徽大学 | A kind of electric adjustable wide-band orbital angular momentum mode reconfigurable antenna of coding |
| CN112886231A (en) * | 2019-11-30 | 2021-06-01 | 华为终端有限公司 | Antenna and terminal equipment |
| CN112086754A (en) * | 2020-09-14 | 2020-12-15 | 电子科技大学 | Low-profile filtering antenna based on super-surface structure |
| CN112332087A (en) * | 2020-10-29 | 2021-02-05 | 杭州电子科技大学 | Differential feed circular polarization 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 |
| CN112701489A (en) * | 2020-12-14 | 2021-04-23 | 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 |
| CN112736473A (en) * | 2020-12-30 | 2021-04-30 | 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 |
| CN115441205A (en) * | 2022-11-09 | 2022-12-06 | 广东工业大学 | High-gain broadband circularly polarized filtering antenna based on super surface and communication equipment |
| 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 |
| CN117394027A (en) * | 2023-12-12 | 2024-01-12 | 华南理工大学 | Dual-frequency self-isolation in-band full-duplex super-surface antenna and design method thereof |
| 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 |
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