CN109638466A - A kind of Meta Materials frequency selection surface texture for improving ultra-wideband antenna gain - Google Patents
A kind of Meta Materials frequency selection surface texture for improving ultra-wideband antenna gain Download PDFInfo
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- CN109638466A CN109638466A CN201811655259.4A CN201811655259A CN109638466A CN 109638466 A CN109638466 A CN 109638466A CN 201811655259 A CN201811655259 A CN 201811655259A CN 109638466 A CN109638466 A CN 109638466A
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- Prior art keywords
- ultra
- wideband antenna
- frequency
- antenna
- meta materials
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- 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
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
-
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
-
- 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
- H01Q19/104—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 a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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- Waveguide Aerials (AREA)
Abstract
Meta Materials frequency for improving ultra-wideband antenna gain selects surface texture, is related to microwave antenna art and electromagnetic material field, is to achieve the purpose that improve ultra-wideband antenna gain.The Meta Materials frequency that the invention discloses a kind of for improving ultra-wideband antenna gain selects surface texture, ultra-wideband antenna selects surface texture by load Meta Materials frequency, reduce the backward radiation loss of antenna, the gain of original antenna is largely improved, to improve the positive radiance of ultra-wideband antenna.The Meta Materials frequency that the invention discloses a kind of for improving ultra-wideband antenna gain selects surface texture, ultra-wideband antenna selects surface texture by load Meta Materials frequency, reduce the backward radiation loss of antenna, the gain of original antenna is largely improved, to improve the positive radiance of ultra-wideband antenna.
Description
Technical field
The present invention relates to microwave antenna arts and electromagnetic material field, and in particular to one kind is for improving ultra-wideband antenna increasing
The Meta Materials frequency of benefit selects surface texture.
Background technique
Ultra wide band is a kind of radio technology with very wide spectrum, and working frequency range is 3.1~10.6GHz, with
Burst pulse, carrierfree, non-sinusoidal signal have low-power consumption, high rate data transmission, high-resolution, low as transport vehicle
The features such as cost, high osmosis, strong anti-interference ability, is widely used in short distance high rate communication, image transmitting, radar, survey
Measure the fields such as positioning, wireless sensor network.The antenna designed to meet radio ultra wide band system demand is ultra-wideband antenna, phase
Than in narrow-band wireless systems, ultra-wideband antenna will not only have extremely wide working band and good impedance matching property, also want
Have the characteristics that lesser group delay, the radiativity of omnidirectional and higher gain.Frequency-selective surfaces are a kind of artificial one-dimensional
Or two-dimension periodic surface texture, it has frequency band gap characteristic, can choose or prevent the electromagnetic wave within the scope of certain frequency to pass
It broadcasts, due to its selectivity to electromagnetic transmission, can be used as filter, electro-magnetic abortion film, antenna reflective face or radar reflection
Cover etc. is widely used in wireless communication technology field.Meta Materials are a kind of special artificial composite material, unit size
Much smaller than operation wavelength, belong to sub-wavelength structure, compared with common material, particularity is embodied in negative refractive index, bears
Dielectric constant or negative magnetic conductivity.The unique electromagnetic performance research of Meta Materials is goed deep into recently as people, make its
In microwave band, especially has potential in antenna and radio-frequency devices field and be widely applied.
In order to ensure the high efficiency of ultra-wideband communications, the requirement to emission system is reduced, studying has high gain characteristics
Ultra-wideband antenna becomes key.Using the plane with frequency-selective surfaces structure as the subreflector of antenna, to electromagnetic radiation
Wave is filtered, and can reduce the backward radiation of antenna, so that antenna gain is improved, but, usual frequency-selective surfaces
Selectivity belong to narrowband operation scope, so for ultra-wideband antenna design with ultra-wide working band frequency select table
Face structure is very necessary.
The ultra-wideband antenna with relatively stable high-gain is proposed within 2013, using frequency-selective surfaces as anti-
Face is penetrated, the peak gain of antenna has been increased to 9.3dBi from 4.3dBi, but designed frequency-selective surfaces have four layers
Different structures, there are certain complexities in terms of processing and fabricating.Surajit Kundu et al. was selected in 2018 using frequency
The gain that surface improves a kind of plane ultra-wideband antenna is selected, the gain of antenna is improved into 2- in most of working frequency range
4dBi, but the planar dimension of the frequency-selective surfaces is excessive, and is double-layer structure.
Summary of the invention
The purpose of the present invention is to provide a kind of for improving the Meta Materials frequency-selective surfaces knot of ultra-wideband antenna gain
Structure has the frequency-selective surfaces of ultrabroad band characteristic, and the reflecting surface as antenna using the design of Meta Materials electromagnetic property, with
This achievees the purpose that improve ultra-wideband antenna gain.
The object of the present invention is achieved like this:
The Meta Materials frequency that the invention discloses a kind of for improving ultra-wideband antenna gain selects surface texture, including super
Broad-band antenna medium substrate 101, ultra-wideband antenna radiation patch 102, ultra-wideband antenna feeding microstrip line 103, ultra-wideband antenna
Earth plate 104, frequency-selective surfaces medium substrate 105 and 30 metamaterial units 106；The frequency-selective surfaces medium
Substrate 105 is located at the underface of ultra-wideband antenna medium substrate 101, and the metamaterial unit 106 is arranged in a manner of 5 × 6
It is listed in the upper surface of frequency-selective surfaces medium substrate 105；The radiation patch 102 and feeding microstrip line of the ultra-wideband antenna
103 are connected and are located at the upper surface of antenna medium substrates 101, and earth plate 104 is located at the lower surface of antenna medium substrates 101.
The ultra-wideband antenna medium substrate 101 and frequency-selective surfaces medium substrate 105 is rectangular configuration, ultra wide band
Aerial radiation patch 102 is circular configuration, and ultra-wideband antenna feeding microstrip line 103 is rectangular configuration, ultra-wideband antenna earth plate
104 be wide gap structure.
The metamaterial unit 106 is made of " I " shape metal loop wire 107 and four open metal straight-flanked rings 108,
Wherein " I " shape metal loop wire 107 is located at the center of metamaterial unit, and four open metal straight-flanked rings 108 are located at " I " shape gold
Belong to loop wire two sides, and its position and opening direction have upper and lower and bilateral symmetry simultaneously.
Radiation patch 102, feeding microstrip line 103 and the earth plate 104 of the ultra-wideband antenna can be according to shape or rulers
Very little changes to adjust the overall structure of ultra-wideband antenna.
The metamaterial unit 106 can the gain target to be achieved according to needed for different ultra-wideband antenna structures, adjustment
Laterally or longitudinally spacing between adjacent metamaterial unit 106, or adjustment constitute the metamaterial unit 106 of frequency-selective surfaces
Position and quantity.
The beneficial effects of the present invention are:
It is disclosed by the invention it is a kind of for improve ultra-wideband antenna gain Meta Materials frequency select surface texture, by
In rectangular dielectric substrate printing have Meta Materials characteristic Compact frequency selective surface, and place it in ultra-wideband antenna just under
Side, reduces the radiation loss of antenna, effectively raises the radiation efficiency and gain of original ultra-wideband antenna.
Compared with prior art, Meta Materials frequency selection surface texture disclosed by the invention there is the frequency of ultra-wide to select special
Property, all have the function of bandreject filtering in the working frequency range of entire radio ultra wide band system, makes ultra-broadband signal can not be on its surface
Transmission can be with the loss of effective solution antenna backward radiation for loading the antenna of the frequency-selective surfaces structure
Problem makes antenna energy more concentrate and improve gain parameter.
Meta Materials frequency disclosed by the invention for improving ultra-wideband antenna gain selects surface texture for planar structure,
Have the characteristics that structure is simple, small size, low section, and be easily integrated and processing and fabricating, is highly suitable for minimizing sum aggregate
At the radio ultra wide band system application of change.
Meta Materials frequency selection surface texture disclosed by the invention for improving ultra-wideband antenna gain, it is only necessary to design
The quantity and spacing parameter of the metamaterial unit, the gain that different ultra-wideband antenna structures can be solved improve problem, greatly
The design optimization time is saved greatly.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is side structure schematic diagram of the invention；
Fig. 3 is the structural schematic diagram of metamaterial unit of the invention；
Fig. 4 is antenna gain simulation result diagram of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to figs. 1 and 2, the Meta Materials frequency choosing that the invention discloses a kind of for improving ultra-wideband antenna gain
Select surface texture, including ultra-wideband antenna medium substrate 101, ultra-wideband antenna radiation patch 102, ultra-wideband antenna fed microstrip
Line 103, ultra-wideband antenna earth plate 104, frequency-selective surfaces medium substrate 105 and 30 metamaterial units 106；Wherein surpass
Broad-band antenna medium substrate 101 and frequency-selective surfaces medium substrate 105 are the silicon materials that dielectric constant is 11.9, and high dielectric is normal
The selection of number silicon materials substantially increases integrally-built miniaturization and integration degree；Ultra-wideband antenna radiation patch 102, feedback
Electric microstrip line 103 and earth plate 104 and 30 metamaterial units 106 are all made of aluminum material.MEMS technology can be used in the present invention
Processing realizes that for the antenna of miniaturization, MEMS technology ensure that the accuracy and reliability of processing.
Referring to figs. 1 and 2, the ultra-wideband antenna radiation patch 102 of top is circular configuration, ultra-wideband antenna feed
Microstrip line 103 is rectangular configuration, and the two is connected and is located at the upper surface of antenna medium substrates 101, ultra-wideband antenna earth plate
104 are located at the lower surface of antenna medium substrates 101, and for wide gap structure, ultrabroad band is may be implemented in such antenna structure
Impedance matching property, meet the ultratvide frequency band design requirement of radio ultra wide band system.
Referring to figs. 1 and 2, frequency-selective surfaces are located at the underface of ultra-wideband antenna, including frequency-selective surfaces
Medium substrate 105 and 30 metamaterial unit 106, wherein metamaterial unit is arranged in frequency-selective surfaces medium in a manner of 5 × 6
The upper surface of substrate 105.This 30 metamaterial units 106 have collectively constituted frequency-selective surfaces, make ultra-broadband signal can not be
It is propagated in its structure, the frequency selective characteristic with bandreject filtering, to reduce the reradiation damage of top ultra-wideband antenna
Consumption, improves the positive radiance of antenna.
As shown in connection with fig. 3, each metamaterial unit 106 is by " I " shape metal loop wire 107 and four open metals
Straight-flanked ring 108 forms, wherein " I " shape metal loop wire 107 is located at the center of metamaterial unit, four open metal straight-flanked rings
108 are located at " I " shape metal loop wire two sides, and position and opening direction have upper and lower and bilateral symmetry simultaneously." I " shape becket
Line 107 has electric resonance characteristic, and effective dielectric constant is negative, and four open metal straight-flanked rings 108 have magnetic resonance special
Property, equivalent permeability is negative.In the frequency range defined in radio ultra wide band system, two kinds of structure collective effects make metamaterial unit
106 in entire band limits effective electromagnetic parameter be negative, be provided with the special electromagnetic attribute of Meta Materials, realize ultra wide band
Frequency band gap characteristic, so as to inhibit the Electromagnetic Wave Propagation in its structure.
As shown in connection with fig. 4, ultra-wideband antenna gain characteristic is improved to Meta Materials frequency selection surface texture to be emulated
Analysis, it can be seen that after Meta Materials frequency selection surface texture is added below ultra-wideband antenna, under 9GHz Frequency point, ultra-wide
Band antenna gain increase rate is maximum, and gain improves 4.6dB, and in the band limits of entire ultra wide band, antenna gain is average
Improve 3.28dB.
To sum up, the Meta Materials frequency that the invention discloses a kind of for improving ultra-wideband antenna gain selects surface texture,
Ultra-wideband antenna selects surface texture by load Meta Materials frequency, reduces the backward radiation loss of antenna, largely
On improve the gain of original antenna, to improve the positive radiance of ultra-wideband antenna.
In practical engineering applications, the radiation patch 102 of the ultra-wideband antenna, feeding microstrip line 103 and earth plate
104 can adjust the ultra-wideband antenna overall structure of top in Fig. 1 according to the change of shape or size.Meanwhile the super material
Material unit 106 can the gain target to be achieved according to needed for different ultra-wideband antenna structures, adjust adjacent metamaterial unit 106
Between laterally or longitudinally spacing, or adjustment constitute frequency-selective surfaces metamaterial unit 106 position and quantity.
Claims (6)
1. a kind of Meta Materials frequency for improving ultra-wideband antenna gain selects surface texture, it is characterized in that: it includes ultra-wide
Band antenna medium substrates (101), ultra-wideband antenna radiation patch (102), ultra-wideband antenna feeding microstrip line (103), ultra wide band
Antenna ground plate (104), frequency-selective surfaces medium substrate (105) and M metamaterial unit (106)；The frequency selection
Surface dielectric substrate (105) is located at the underface of ultra-wideband antenna medium substrate (101), and the M metamaterial unit
(106) it is respectively positioned in the upper surface of frequency-selective surfaces medium substrate (105)；The radiation patch of the ultra-wideband antenna
(102) it is connected and is located at the upper surface of antenna medium substrates (101) with feeding microstrip line (103), earth plate (104) is located at day
The lower surface of line medium substrate (101)；M is positive integer.
2. a kind of Meta Materials frequency for improving ultra-wideband antenna gain according to claim 1 selects surface texture,
It is characterized in that, the ultra-wideband antenna medium substrate (101) and frequency-selective surfaces medium substrate (105) are rectangle knot
Structure, ultra-wideband antenna radiation patch (102) are circular configuration, and ultra-wideband antenna feeding microstrip line (103) is rectangular configuration, ultra-wide
Band antenna ground plate (104) is wide gap structure.
3. a kind of Meta Materials frequency for improving ultra-wideband antenna gain according to claim 1 selects surface texture,
It is characterized in that, the metamaterial unit (106) is by " I " shape metal loop wire (107) and four open metal straight-flanked rings
(108) it forms, wherein " I " shape metal loop wire (107) is located at the center of metamaterial unit, four open metal straight-flanked rings
(108) it is located at " I " shape metal loop wire two sides, and its position and opening direction have upper and lower and bilateral symmetry simultaneously.
4. according to claim 1 or 2 a kind of for improving the Meta Materials frequency-selective surfaces knot of ultra-wideband antenna gain
Structure, it is characterised in that: radiation patch (102), feeding microstrip line (103) and the earth plate (104) of the ultra-wideband antenna can
The overall structure of ultra-wideband antenna is adjusted according to the change of shape or size.
5. according to claim 1 or 2 a kind of for improving the Meta Materials frequency-selective surfaces knot of ultra-wideband antenna gain
Structure, which is characterized in that the metamaterial unit (106) gain mesh to be achieved according to needed for different ultra-wideband antenna structures
Mark adjusts the laterally or longitudinally spacing between adjacent metamaterial unit (106), or adjustment constitutes the Meta Materials of frequency-selective surfaces
The position of unit (106) and quantity.
6. according to claim 1 or 2 a kind of for improving the Meta Materials frequency-selective surfaces knot of ultra-wideband antenna gain
Structure, which is characterized in that M=30, and 30 metamaterial units (106) are arranged in frequency-selective surfaces medium substrate in a manner of 5 × 6
(105) upper surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811655259.4A CN109638466A (en) | 2018-12-27 | 2018-12-27 | A kind of Meta Materials frequency selection surface texture for improving ultra-wideband antenna gain |
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| CN201811655259.4A CN109638466A (en) | 2018-12-27 | 2018-12-27 | A kind of Meta Materials frequency selection surface texture for improving ultra-wideband antenna gain |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113497343A (en) * | 2020-03-20 | 2021-10-12 | 北京小米移动软件有限公司 | Antenna structure and electronic device |
| CN114498057A (en) * | 2022-02-25 | 2022-05-13 | 潍坊歌尔电子有限公司 | Antenna structure and electronic equipment |
| CN116169468A (en) * | 2023-04-24 | 2023-05-26 | 吉林大学 | Ultra-wideband directional radiation antenna of ground penetrating radar |
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Cited By (3)
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| CN113497343A (en) * | 2020-03-20 | 2021-10-12 | 北京小米移动软件有限公司 | Antenna structure and electronic device |
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| CN116169468A (en) * | 2023-04-24 | 2023-05-26 | 吉林大学 | Ultra-wideband directional radiation antenna of ground penetrating radar |
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