CN107425293A - A kind of left-right-hand circular polarization restructural slot antenna - Google Patents
A kind of left-right-hand circular polarization restructural slot antenna Download PDFInfo
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- CN107425293A CN107425293A CN201710592726.2A CN201710592726A CN107425293A CN 107425293 A CN107425293 A CN 107425293A CN 201710592726 A CN201710592726 A CN 201710592726A CN 107425293 A CN107425293 A CN 107425293A
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- metal
- circular polarization
- slot antenna
- medium substrate
- switch diode
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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
- H01Q15/24—Polarising devices; Polarisation filters
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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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Abstract
The present invention discloses a kind of left-right-hand circular polarization restructural slot antenna, including medium substrate, first switch diode, second switch diode and dc source；The upper surface of medium substrate is with being provided with metal；The lower surface of medium substrate is provided with microstrip structure；Ring radiation gap is provided among metal ground；Ring radiation gap is separated into inner metal and outside metal by metal；First switch diode and second switch diode reverse are connected across between the metal of ring radiation gap both sides；The inner metal and outside metal that dc source the two poles of the earth are separated by two wires with ring radiation gap are connected.Microstrip structure couples energy to ring radiation gap, and the package inductance for turning on switching diode divides annular radiating slot main mould for two amplitudes are equal, degenerate mode of quadrature in phase, and then realizes circular polarization radiation characteristic；The conducting of two switching diodes of switching and cut-off state, the purpose of reconstruct circular polarisation electromagnetic wave rotation direction can be reached.
Description
Technical field
The invention belongs to antenna technical field, more particularly to a kind of left-right-hand circular polarization restructural slot antenna.
Background technology
Antenna is the Primary Component of wireless communication system, plays energy conversion between guided electromagnetic wave and radiated electromagnetic wave
Effect.Compared with linear polarized antenna, circular polarized antenna have resistance misty rain decay, suppress multipath interference signal and relax reception with
The outstanding advantage of transmitting antenna installation position limitation.Left-right-hand circular polarization reconfigurable antenna is advantageous to eliminate to be caused by multipath effect
Energy fading problem, realize the more superior polarization modulation system of performance, support frequency multiplexing function and then increase system to lead to
Believe capacity.Therefore, superior, the simple and practical left-right-hand circular polarization reconfigurable antenna of design performance is for lifting wireless communication system
Performance, reduction Wireless Telecom Equipment cost have great importance.
Slot antenna, most commonly seen is microstrip slot antenna, with impedance bandwidth is wide, fault tolerance is high, easy realization
Circular polarisation, section are low, small volume, good nature in light weight, conveniently being integrated with planar circuit, thus are widely used in all kinds of nothings
Line communication equipment.The problem of being primarily present in existing left-right-hand circular polarization restructural slot antenna includes：Switching diode quantity
More, DC bias circuit is complicated, and be still significantly improved space；Volume size is excessive, can not meet that Wireless Telecom Equipment is small-sized
The development trend of change；Circular polarisation exciting technique and polarization Reconfiguration Technologies are separate, as Reconfiguration Technologies Primary Component
Switching diode is considered only as perfect switch, and characteristic is underutilized.
2003, the scholar such as M.K.Fries was in " IEEE Microwave and Wireless Components
Entitled " A Reconfigurable Slot Antenna With Switchable are delivered on Letters "
Polarization " article.Conducting and cut-off state of the article by controlling switch diode, select the entelechy of diverse location
Change perturbation gap pair, realize left-hand circular polarization or right-handed circular polarization radiation characteristic, but antenna needs up to four switches two
Pole pipe, and DC bias circuit is complicated.
2006, the scholar such as J.F.Wu " was delivering entitled on IET Electronics Letters "
“BroadbandCircularly-Polarized Microstrip Antenna With Switchable
Polarization Sense " article.Article be used only two switching diodes control open annular microstrip line both ends with it is micro-
The connection of ribbon feeder and off-state, the rotation direction of change circular polarisation electromagnetic wave, but antenna itself " medium substrate-foam-
Medium substrate " sandwich structure is excessively complicated, section is high, is unfavorable for batch making.
2012, the scholar such as J.S.Row was in " IEEE Transactions on Antennas and Propagation "
On deliver entitled " Circular Polarization and Polarization Reconfigurable Designs for
Annular Slot Antennas " article.Article uses two switching diodes and single-layer medium substrate, by traditional " L " type
Microstrip feed line is improved to " arrow " type microstrip feed line, with reference to the switching characteristic and low on-resistance characteristic of switching diode, makes spoke
Radio magnetic wave can switch between left-hand circular polarization and right-handed circular polarization, but antenna size is excessive, and it is wireless to be unfavorable for miniaturization
The application of communication equipment.
Therefore, comprehensive disclosed left-right-hand circular polarization restructural slot antenna, it is necessary to study new construction, new departure
Realize the high-performance left-right-hand circular polarization restructural slot antenna that DC bias circuit is succinct, size is small, section is low.
The content of the invention
It is an object of the invention to provide a kind of left-right-hand circular polarization restructural slot antenna, to overcome lacking for above-mentioned technology
Point and deficiency.Present invention only requires two switching diodes and single-layer medium substrate, have that circular polarisation band is wide, radiance
Well, the characteristics of DC bias circuit is succinct, simple in construction, easy to make, and cost is cheap.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of left-right-hand circular polarization restructural slot antenna, including medium substrate, first switch diode, second switch two
Pole pipe and dc source；The upper surface of medium substrate is with being provided with metal；The lower surface of medium substrate is provided with microstrip structure；Metal
Centre is provided with ring radiation gap；Ring radiation gap is separated into inner metal and outside metal by metal；First switch two
Pole pipe and second switch diode reverse are connected across between the metal of ring radiation gap both sides；Dc source the two poles of the earth pass through two wires
The inner metal and outside metal separated with ring radiation gap is connected.
Further, microstrip structure is made up of microstrip feed line and micro-strip the tuning minor matters two parts being connected with each other.
Further, microstrip feed line upper edge is tangent in the projection of metal ground and the cylindrical minimum point in ring radiation gap.
Further, the position of first switch diode and second switch diode relative to microstrip structure center line pair
Claim.
Further, first switch diode and second switch diode loading position and the line phase at medium substrate center
Angle for microstrip structure center line is 45 °.
Further, ring radiation gap and medium substrate center superposition.
Further, medium substrate is square glass epoxy resin medium substrate, and size is 50mm × 50mm, and dielectric is normal
Number is 4.4, loss angle tangent 0.02；First switch diode and second switch diode select Infineon's BAR50-03W cores
Piece；Direct current power source voltage is 0.95V；Ring radiation gap exradius is 18.8mm, width 2mm；Micro-strip tuning minor matters length
Spend for 18.8mm, width 2mm；Microstrip feed line width is 3mm.
Further, electromagnetic signal at microstrip feed line port by being inputted, energy coupling to ring radiation gap, and it is radiated
Main mould splits into that amplitude is equal, two degenerate modes of quadrature in phase under the package inductance effect of conducting state switching diode,
And then circular polarization radiation characteristic is realized, micro-strip tuning minor matters are used to adjust Antenna Impedance Matching, change direct current power source voltage switching
The conducting of first switch diode and second switch diode and cut-off state, it is finally reached reconstruct circular polarisation electromagnetic wave rotation direction
Purpose.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1. slot antenna of the present invention realizes circular polarization radiation characteristic using switching diode itself package inductance, no
Extra perturbation unit or the feeding network of complexity are needed, therefore structure is more simple, it is more convenient to make.
2. slot antenna of the present invention is reversely connected across ring radiation gap both sides gold using two switching diodes
The scheme of category, DC bias circuit significantly simplify, it is no longer necessary to which other lamped elements, structure is more succinct, and cost of manufacture is cheap.
3. slot antenna of the present invention only needs one layer of medium substrate, design is simple, small volume, section are low, weight
Gently, conveniently integrated with planar circuit, can be applied to various wireless communication equipment.
Circular polarisation band of the present invention is wide, radiance is good, DC bias circuit is succinct, simple in construction, easy to make, cost
It is cheap.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of left-right-hand circular polarization restructural slot antenna of the present invention.
Fig. 2 is the top level structure schematic diagram of left-right-hand circular polarization restructural slot antenna of the present invention.
Fig. 3 is the fabric schematic diagram of left-right-hand circular polarization restructural slot antenna of the present invention.
Fig. 4 is the embodiment of the present invention from switching diode conducting and the equivalent circuit diagram of cut-off state；Fig. 4 (a) is to lead
Logical view；Fig. 4 (b) is cut-off state schematic diagram.
Fig. 5 is the simulation result of return loss under difference polarization mode of the embodiment of the present invention.
Fig. 6 be under difference polarization mode of the embodiment of the present invention normal axis than simulation result.
Fig. 7 is left-hand circular polarization pattern antenna pattern in 2.45GHz of the embodiment of the present invention.
Fig. 8 is right-handed circular polarization mode radiation directional diagram in 2.45GHz of the embodiment of the present invention.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiment of the present invention is not limited to
This.
The left-right-hand circular polarization restructural slot antenna of the present invention is made in the medium substrate of double-side copper-applying, and circuit can be used
Plate burn into laser scoring, machinery such as scribe at the mature technology easily processing and fabricating.The core concept of the present invention is to utilize switch
Diode switch characteristic and itself package inductance, one side conducting state lower switch diode itself package inductance will divide annular
Radiating slot main mould is that two amplitudes are equal, degenerate mode of quadrature in phase, and then has encouraged circular polarization radiation electromagnetic wave, another
The conducting of aspect two switching diodes of switching and cut-off state, reach the purpose of reconstruct circular polarisation rotation direction.
Refer to shown in Fig. 1 to Fig. 3, a kind of left-right-hand circular polarization restructural slot antenna of the present invention, including medium substrate
1st, the metal of the upper surface of medium substrate 1 printing 2, the microstrip structure 3 of the lower surface of medium substrate 1 printing, etch on 2 in metal
4, two, ring radiation gap be reversely connected across (the dotted line round frame of switching diode 5 and 6 of the both sides metal of ring radiation gap 4
It is interior).Ring radiation gap 4 and the center superposition of medium substrate 1.Ring radiation gap 42 is separated into inner metal and outer by metal
Side metal；Microstrip structure 3 is made up of microstrip feed line 31 and micro-strip the tuning two parts of minor matters 32 being connected with each other, on microstrip feed line 31
Projection on 2 and 4 cylindrical minimum point of ring radiation gap are tangent in metal at edge.Dc source 7 (dotted ellipse inframe) two
The inner metal and outside metal that pole is separated by two wires with ring radiation gap 4 are connected.Two switching diodes 5 and 6
Position it is symmetrical relative to the center line of microstrip structure 3, the line at two switching diodes and the center of medium substrate 1 is relative to micro-
The angle of the center line of band structure 3 is 45 °.
The operation principle of the left-right-hand circular polarization restructural slot antenna of the present invention is as follows：Electromagnetic signal passes through microstrip feed line
Inputted at 31 ports, energy coupling to ring radiation gap 4, it radiates package inductance of the main mould in conducting state switching diode
Under effect, split into that amplitude is equal, two degenerate modes of quadrature in phase, and then realize circular polarization radiation characteristic, micro-strip tuning branch
Section 32 is used to adjust Antenna Impedance Matching, and the conducting of two switching diodes 5,6 can be switched and cut by changing the voltage of dc source 7
Only state, it is finally reached the purpose of reconstruct circular polarisation electromagnetic wave rotation direction.
The left-right-hand circular polarization restructural slot antenna of the present invention uses printed circuit board process to be made in size as 50mm
× 50mm, dielectric constant 4.4, loss angle tangent 0.02, thickness are 1.6mm double-side copper-applying glass epoxy resin medium base
On plate 1, switching diode 5,6 is from Infineon BAR50-03W chips, and the voltage of dc source 7 is 0.95V, ring radiation gap 4
Exradius is 18.8mm, width 2mm, and the micro-strip tuning length of minor matters 32 is 18.8mm, width 2mm, and microstrip feed line 31 is wide
Spend for 3mm.
Fig. 4 is that switching diode BAR50-03W chips are turning on and the equivalent circuit diagram under cut-off state respectively.Turn on shape
Under state, switching diode is equivalent to package inductance Lp=1.8nH and forward conduction resistance Rf=3 Ω series circuit；Cut-off state
Under, switching diode is equivalent to electric capacity Cr=0.15pF and backward resistance Rr=5k Ω are in parallel, then with package inductance Lp=1.8nH
The circuit of series connection.
Fig. 5 and Fig. 6 is that embodiment left-right-hand circular polarization restructural slot antenna echo under different polarization modes damages respectively
The simulation result of consumption and normal axis ratio.Due to the symmetry of structure, antenna is in left-hand circular polarization and right-handed circular polarization both of which
Under, return loss and normal axis ratio characteristic are basically identical.Specifically, the frequency range of antenna 10dB return losses is
2.15GHz to 2.85GHz, relative bandwidth are more than 28.0%；3dB normal axis than frequency range be 2.36GHz to 2.54GHz,
Relative bandwidth is about 7.5%.
In different polarization modes when Fig. 7 and Fig. 8 is embodiment left-right-hand circular polarization restructural slot antenna 2.45GHz respectively
The simulation result of lower far field radiation pattern.Under two kinds of polarization modes, the antenna all has circular polarisation purity height, beam angle
Excellent radiation characteristic wide, cross-polarization levels are low.
Above-described embodiment is the preferred embodiment of the present invention, but it cannot be assumed that embodiments of the present invention are only limitted to this,
Those of ordinary skill in the art can also make some improvement on the premise of spirit of the invention and technical principle is not departed from
And retouching, it is regarded as belonging to the claims submitted by the present invention and determines scope of patent protection.
Claims (8)
1. a kind of left-right-hand circular polarization restructural slot antenna, it is characterised in that including medium substrate (1), the pole of first switch two
Manage (5), second switch diode (6) and dc source (7)；
The upper surface of medium substrate (1) is with being provided with metal (2)；The lower surface of medium substrate (1) is provided with microstrip structure (3)；
Ring radiation gap (4) are provided among (2) metal；(2) are separated into inner metal by metal in ring radiation gap (4)
With outside metal；
First switch diode (5) and second switch diode (6) are reversely connected across between the metal of ring radiation gap (4) both sides；
The inner metal and outside metal that dc source (7) the two poles of the earth are separated by two wires with ring radiation gap (4) are connected.
A kind of 2. left-right-hand circular polarization restructural slot antenna according to claim 1, it is characterised in that microstrip structure
(3) it is made up of microstrip feed line (31) and micro-strip tuning minor matters (32) two parts being connected with each other.
A kind of 3. left-right-hand circular polarization restructural slot antenna according to claim 2, it is characterised in that microstrip feed line
(31) the upper edge projection on (2) and ring radiation gap (4) cylindrical minimum point tangent in metal.
A kind of 4. left-right-hand circular polarization restructural slot antenna according to claim 1, it is characterised in that first switch two
The position of pole pipe (5) and second switch diode (6) is symmetrical relative to the center line of microstrip structure (3).
A kind of 5. left-right-hand circular polarization restructural slot antenna according to claim 4, it is characterised in that first switch two
Pole pipe (5) and second switch diode (6) loading position and the line at medium substrate (1) center are relative in microstrip structure (3)
The angle of heart line is 45 °.
6. a kind of left-right-hand circular polarization restructural slot antenna according to claim 1, it is characterised in that ring radiation stitches
Gap (4) and medium substrate (1) center superposition.
A kind of 7. left-right-hand circular polarization restructural slot antenna according to claim 1, it is characterised in that medium substrate
(1) it is square glass epoxy resin medium substrate, size is 50mm × 50mm, dielectric constant 4.4, and loss angle tangent is
0.02；First switch diode (5) and second switch diode (6) select Infineon's BAR50-03W chips；Dc source (7)
Voltage is 0.95V；Ring radiation gap (4) exradius is 18.8mm, width 2mm；Micro-strip tunes minor matters (32) length
18.8mm, width 2mm；Microstrip feed line (31) width is 3mm.
8. a kind of left-right-hand circular polarization restructural slot antenna according to claim 2, it is characterised in that electromagnetic signal is led to
Cross at microstrip feed line (31) port and input, energy coupling to ring radiation gap (4), it radiates main mould and switchs two in conducting state
Under the package inductance effect of pole pipe, split into that amplitude is equal, two degenerate modes of quadrature in phase, and then realize circular polarization radiation spy
Property, micro-strip tuning minor matters (32) are used to adjust Antenna Impedance Matching, change dc source (7) voltage switching first switch diode
(5) and second switch diode (6) conducting and cut-off state, be finally reached reconstruct circular polarisation electromagnetic wave rotation direction purpose.
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Cited By (15)
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| CN107978869A (en) * | 2017-12-14 | 2018-05-01 | 南京航空航天大学 | A kind of broadband multipolarization reconstruct slot antenna and its polarization method |
| CN108682971A (en) * | 2018-03-22 | 2018-10-19 | 南京理工大学 | A kind of restructural micro-strip array antenna of Ku/Ka audio range frequencies |
| CN109860986A (en) * | 2019-01-23 | 2019-06-07 | 电子科技大学 | A kind of frequency reconfigurable microstrip antenna based on ring radiation patch |
| CN109980343A (en) * | 2019-03-14 | 2019-07-05 | 华南理工大学 | A kind of omnidirectional/orientation direction figure is restructural and polarization reconfigurable antenna |
| CN110718770A (en) * | 2019-09-29 | 2020-01-21 | 山西大学 | Full-polarization reconfigurable MIMO antenna |
| CN110783701A (en) * | 2019-09-25 | 2020-02-11 | 西安电子科技大学 | Circular polarization reconfigurable antenna integrated with adjustable phase-shifting power divider |
| CN111262033A (en) * | 2020-03-09 | 2020-06-09 | 西南交通大学 | Ultra-wideband microstrip antenna |
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| CN112002996A (en) * | 2020-07-10 | 2020-11-27 | 北京邮电大学 | Design method of four-polarization reconfigurable super-surface antenna |
| CN113300090A (en) * | 2021-05-27 | 2021-08-24 | 南通大学 | Differential feed directional diagram reconfigurable dielectric patch antenna |
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| CN114421167A (en) * | 2022-01-17 | 2022-04-29 | 中国电力科学研究院有限公司 | Dual-frequency left-right-handed circular polarization reconfigurable slot antenna |
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| CN107978869B (en) * | 2017-12-14 | 2023-07-25 | 南京航空航天大学 | Broadband multi-polarization reconstruction slot antenna and polarization method thereof |
| CN107978869A (en) * | 2017-12-14 | 2018-05-01 | 南京航空航天大学 | A kind of broadband multipolarization reconstruct slot antenna and its polarization method |
| CN108682971B (en) * | 2018-03-22 | 2021-01-26 | 南京理工大学 | Ku/Ka waveband frequency reconfigurable microstrip array antenna |
| CN108682971A (en) * | 2018-03-22 | 2018-10-19 | 南京理工大学 | A kind of restructural micro-strip array antenna of Ku/Ka audio range frequencies |
| CN109860986A (en) * | 2019-01-23 | 2019-06-07 | 电子科技大学 | A kind of frequency reconfigurable microstrip antenna based on ring radiation patch |
| CN109980343A (en) * | 2019-03-14 | 2019-07-05 | 华南理工大学 | A kind of omnidirectional/orientation direction figure is restructural and polarization reconfigurable antenna |
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| CN111262033A (en) * | 2020-03-09 | 2020-06-09 | 西南交通大学 | Ultra-wideband microstrip antenna |
| CN111585032A (en) * | 2020-05-13 | 2020-08-25 | 南京航空航天大学 | Reconfigurable chip antenna based on TSV three-dimensional packaging and reconfiguration method thereof |
| CN111585032B (en) * | 2020-05-13 | 2021-10-26 | 南京航空航天大学 | Reconfigurable chip antenna based on TSV three-dimensional packaging and reconfiguration method thereof |
| CN112002996A (en) * | 2020-07-10 | 2020-11-27 | 北京邮电大学 | Design method of four-polarization reconfigurable super-surface antenna |
| WO2022017484A1 (en) * | 2020-07-24 | 2022-01-27 | 华为技术有限公司 | Antenna and electronic device |
| CN113300090A (en) * | 2021-05-27 | 2021-08-24 | 南通大学 | Differential feed directional diagram reconfigurable dielectric patch antenna |
| CN113300090B (en) * | 2021-05-27 | 2022-08-26 | 南通大学 | Differential feed directional diagram reconfigurable dielectric patch antenna |
| CN114256629A (en) * | 2021-11-18 | 2022-03-29 | 电子科技大学 | Ka frequency band broadband reconfigurable reflection unit and array antenna |
| CN114421167A (en) * | 2022-01-17 | 2022-04-29 | 中国电力科学研究院有限公司 | Dual-frequency left-right-handed circular polarization reconfigurable slot antenna |
| CN114421167B (en) * | 2022-01-17 | 2024-03-26 | 中国电力科学研究院有限公司 | Dual-frequency left-right circular polarization reconfigurable slot antenna |
| CN114792888A (en) * | 2022-05-11 | 2022-07-26 | 领翌技术(横琴)有限公司 | Antenna and electronic device |
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