CN110323562A - Tunable ultra wide band mimo antenna based on complementary openings resonant ring - Google Patents
Tunable ultra wide band mimo antenna based on complementary openings resonant ring Download PDFInfo
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- CN110323562A CN110323562A CN201910611743.5A CN201910611743A CN110323562A CN 110323562 A CN110323562 A CN 110323562A CN 201910611743 A CN201910611743 A CN 201910611743A CN 110323562 A CN110323562 A CN 110323562A
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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
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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
-
- 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
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- 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
- H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Abstract
A kind of tunable ultra wide band mimo antenna based on complementary openings resonant ring, belongs to mimo antenna technical field.The present invention is influenced for existing UWB-MIMO antenna by narrow-band communication system, and communication quality is poor, and the nonadjustable problem of trap frequency.It includes medium substrate, the upper and lower surfaces of medium substrate cover metal patch, the metal patch of upper surface includes two monopole antenna units being placed in parallel, the metal patch of lower surface includes antenna floor, the monopole antenna unit includes radiating element and the feeder line that connect between two parties with radiating element bottom end, radiating element is rectangle, two below radiating element angle unfilled corner triangular in shape；Feeder line is the isosceles trapezoid that gradual change from top to bottom is widened；Two rectangle complementary openings resonant rings placed with one heart are set in the top half of radiating element, and the rectangle complementary openings resonant ring is position-movable in radiating element.Double traps of present invention realization signal and tunable and small with mutual coupling advantage.
Description
Technical field
The present invention relates to the tunable ultra wide band mimo antennas based on complementary openings resonant ring, belong to mimo antenna technology neck
Domain.
Background technique
Ultra wide band (Ultra-wideband, UWB) technology is in a kind of wireless communication technique based on radiation pulse.It is close
Nian Lai, UWB technology is due to having very wide working frequency range, high message transmission rate, very strong anti-interference ability, extremely low
The series of advantages such as power loss and sensitive positioning accuracy, receive significant attention.In order not to interfere the logical of other communication systems
Letter, Federal Communications Committee are the very strict limitation specification of frequency spectrum regulatory of UWB system, i.e., by radio ultra wide band system it is each to
The same sex radiant power Equivalent Isotropic Radiated Power, EIRP) it is limited to be no more than -41.3dBm/
MHz, this makes it be easy to be interfered by a few thing in the wireless communication signals of the narrowband of 3.1-10.6GHz, causes UWB system
Signal-to-Noise is lower, and the accuracy of information transmission reduces, and the total quality of communication is deteriorated.Equally, in isotropic radiation function
After rate is limited, the high-speed information transmission of UWB system can not almost carry out at a distance, generally be only capable of realizing within 10m.
Further, since the channel of UWB communication system is high-frequency selectivity fading channel, frequency content channel abundant in communication process
Intersymbol interference phenomenon very serious can occur when transmission, this can also reduce the quality of communication.
MIMO technology refer to communication system in transmitting terminal using mutiple antennas, emit respectively same signal multiple copies or
Emit multiple and different signals in point at the same time；At the same time, it also uses mutiple antennas to receive respectively in receiving end to come from
In different antennae issue irrelevant same signal or respectively receive different antennae issue different signals.One side
Face, MIMO technology are converted into multiple parallel sub- communication channels by one completely being transmitted the communication channel of information, thus
The multipath fading phenomenon that script generates bad influence to communication system is changed into favorable factor, improves communications system transmission number
According to accuracy, improve communication quality.On the other hand, MIMO technology can communication system do not widen additionally bandwidth of operation and
In the case where increasing transmission power, by using space multiplexing technique, the capacity of communication system channel is expanded, making for frequency spectrum is improved
Use efficiency.
In recent years, mobile communication equipment constantly updates towards the direction small and exquisite, portable, low energy consumption.As can be used for
One of the critical component of mobile communication equipment is designed, UWB-MIMO antenna is at present towards the side of broadband miniaturization and high isolation
To developing.So that UWB-MIMO antenna is possessed higher isolation while miniaturization and bandwidth, is currently to face
A problem.In addition, some instantly very widely used narrow-band communication systems, such as work in the WiMAX of 3.3-3.8GHz
The WLAN communication and emerging work for communicating, working in the C-band communication of 3.7-4.2GHz, work in 5.15-5.825GHz
Communicated in the 5G of 3.3-3.6GHz and 4.4-5GHz etc., their working frequency range is comprised in the work frequency of ultra-wideband communication system
Within section, the communication quality of ultra-wideband communication system is also made to decrease.Therefore, in the mistake for designing and optimizing UWB-MIMO antenna
Cheng Zhong, trap adjustable function are also that account for one of factor of range.
Therefore, against the above deficiency, it is desirable to provide a kind of tunable ultra wide band mimo antenna, make antenna overall dimensions not
In the case where change, realize that double traps are adjustable.
Summary of the invention
It is influenced for existing UWB-MIMO antenna by narrow-band communication system, communication quality is poor, and trap frequency can not
The problem of tune, the present invention provide a kind of tunable ultra wide band mimo antenna based on complementary openings resonant ring.
A kind of tunable ultra wide band mimo antenna based on complementary openings resonant ring of the invention, including medium substrate are situated between
The upper and lower surfaces of matter substrate cover metal patch, and the metal patch of upper surface includes two monopole antennas being placed in parallel
Unit, the metal patch of lower surface include antenna floor,
The monopole antenna unit includes radiating element and the feeder line that connect between two parties with radiating element bottom end, radiating element
Two angle unfilled corners triangular in shape for rectangle, below radiating element；Feeder line is the isosceles trapezoid that gradual change from top to bottom is widened；Radiation
Two rectangle complementary openings resonant rings placed with one heart are set in the top half of unit, and the rectangle complementary openings resonant ring exists
It is position-movable in radiating element.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the rectangle complementary openings
The following opening placed in the middle of the inner ring rectangle of resonant ring, the top of outer ring rectangle is open between two parties.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, inner ring rectangle top
Outer wall and inner wall between embed photoelectricity varactor between two parties, the anode of the photoelectricity varactor connects the outer wall.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the feeder line include 50 Ω
Coaxial waveguide feed.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the antenna floor is located at
The bottom section of medium substrate lower surface, the two sides of the bottom section are rectangle region, setting decoupling resonant ring between two rectangle regions.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the decoupling resonant ring are in
Notch is arranged in the middle section of rectangle outer profile, top；The left side and the right are arranged picture in mirror image；The left side is by multiple semi arches
It is sequentially connected composition.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the multiple semi arch packet
Include four semi arches.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the medium substrate include
FR4 medium substrate, dielectric constant 2.65, with a thickness of 0.8mm, loss angle tangent 0.02；The metal patch includes copper
Patch.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the rectangle complementary openings
A length of 8.5mm in the outer ring rectangular horizontal direction of resonant ring, width 9mm, the seal ring thickness of outer ring rectangle are 0.1mm, outer ring square
The opening of shape is 3.5mm；A length of 7.3mm in the inner ring rectangular horizontal direction of the rectangle complementary openings resonant ring, width are
7.8mm, the seal ring thickness of inner ring rectangle are 0.1mm, and the opening of inner ring rectangle is 3.5mm.
Tunable ultra wide band mimo antenna according to the present invention based on complementary openings resonant ring, the decoupling resonant ring
Following a length of 7mm, the long 9.3mm of the span on the left side and the right, the notch 1.35mm in top middle section decouple the seal ring thickness of resonant ring
For 0.11mm；The semicircle arc radius on the decoupling resonant ring left side or the right is 0.55mm.
Beneficial effects of the present invention: antenna volume of the present invention is small, and structure is simple.Pass through the specific knot to antenna element
Double traps of signal and advantage that is tunable, and having mutual coupling small are realized in structure design.It can be applied in 5G communication system, especially
It is had a good application prospect in the terminal receiver of 5G wireless communication.
The present invention realizes that double traps of antenna are tunable by introducing rectangle complementary openings resonant ring on monopole antenna.
The opening direction of two rectangle complementary openings resonant rings is on the contrary, make the opening electromagnetic coupling of inner ring rectangle will not influence outer ring square
The electromagnetic coupling of shape opening, to realize double trap characteristics.Move rectangle complementary openings resonant ring in radiating element,
It can be realized maximum tunable range.In its working band, the frequency band of double traps can be regulated and controled according to different working environments,
The working signal interference for shielding other systems such as works in the WiMAX communication of 3.3-3.8GHz, works in the C of 3.7-4.2GHz
Band communication, the WLAN communication for working in 5.15-5.825GHz and emerging work in 3.3-3.6GHz's and 4.4-5GHz
5G communication.
Detailed description of the invention
Fig. 1 is the Facad structure signal of the tunable ultra wide band mimo antenna of the present invention based on complementary openings resonant ring
Figure；
Fig. 2 is the backside structure signal of the tunable ultra wide band mimo antenna of the present invention based on complementary openings resonant ring
Figure；
Fig. 3 be by tunable ultra wide band mimo antenna of the present invention rectangle complementary openings resonant ring removal after,
S before decoupling and after decoupling21Simulation result curve；S in figure21Indicate positive transmission coefficient；
Fig. 4 is S of the tunable ultra wide band mimo antenna of the present invention before trap and after trap21Simulation result curve；
Fig. 5 is S of the tunable ultra wide band mimo antenna of the present invention before trap and after trap11Simulation result curve；
S in figure11Indicate input reflection coefficient；
Fig. 6 is the tunable ultra wide band mimo antenna of the present invention face E (face xoz) and the face H (face yoz) at 3.2GHz
Directional diagram；The face E refers to the directional diagram section parallel with direction of an electric field；The face H refers to that the directional diagram parallel with magnetic direction is cut
Face；
Fig. 7 is the tunable ultra wide band mimo antenna of the present invention face E (face xoz) and the face H (face yoz) at 6.5GHz
Directional diagram；
Fig. 8 is the tunable ultra wide band mimo antenna of the present invention face E (face xoz) and the face H (face yoz) at 10GHz
Directional diagram；
Fig. 9 is S of the tunable ultra wide band mimo antenna of the present invention in photoelectricity varactor difference capacitance11Emulation
Result curve comparison diagram；
Figure 10 is S of the tunable ultra wide band mimo antenna of the present invention in photoelectricity varactor difference capacitance21It is imitative
True result curve comparison diagram；
Figure 11 be photoelectricity varactor be 0.3pF when, the antenna of the present invention face E (face xoz) and the face H at 3.2GHz
The directional diagram in (face yoz)；
Figure 12 be photoelectricity varactor be 0.3pF when, the antenna of the present invention face E (face xoz) and the face H at 6.5GHz
The directional diagram in (face yoz)；.
Figure 13 be photoelectricity varactor be 0.3pF when, the antenna of the present invention face E (face xoz) and the face H at 10GHz
The directional diagram in (face yoz).
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
Specific embodiment one, referring to figs. 1 and 2, the present invention provides a kind of based on complementary openings resonant ring
Tunable ultra wide band mimo antenna, including medium substrate 100, the upper and lower surfaces of medium substrate 100 cover metal patch, on
The metal patch on surface includes two monopole antenna units 200 being placed in parallel, and the metal patch of lower surface includes antenna
Plate 300,
The monopole antenna unit 200 includes radiating element 210 and the feeder line connecting between two parties with radiating element bottom end
220, radiating element 210 is rectangle, two angle unfilled corners triangular in shape of 210 lower section of radiating element；Feeder line 220 is from top to bottom gradually
Become the isosceles trapezoid widened；Two rectangle complementary openings resonant rings placed with one heart are set in the top half of radiating element 210
230, the rectangle complementary openings resonant ring 230 is position-movable in radiating element 210.
The rectangle complementary openings resonant ring 230 can be realized by the method slotted on metal patch, pass through fluting
Make electric current in trap frequency integrated distribution near slot, by the size of current at slotted edge is equal, flow direction on the contrary, they
The electromagnetic field of radiation constant amplitude at far field is reversed, to cancel out each other, forms specific stopband, realizes the screen to special frequency channel
Effect is covered, that is, realizes double traps.It is most intensive that the position of adjustment rectangle complementary openings resonant ring 230 makes it act on electromagnetic field
Region, double trap characteristics can be most obvious.
Monopole antenna unit 200 has carried out excellent in the circular patch structure of existing monopole antenna in present embodiment
Change design, occupies more effective areas relative to existing circular patch, the formation of monopole antenna unit 200 in the present invention
Spade structure can more effectively utilize usable floor area, preferably realize impedance matching, increase the propagation distance of electric current, expand band
It is wide.
Further, as shown in connection with fig. 1, the following opening placed in the middle of the inner ring rectangle of the rectangle complementary openings resonant ring 230,
The top of outer ring rectangle is open between two parties.
In addition, in specific implementation, rectangle complementary openings resonant ring 230 can also in left and right corresponding opening, principle with
Opening mode in the present invention is identical；Specific structure size and openings of sizes can be calculated by formula to be obtained, as needed
Trap frequency, it is corresponding to calculate the size for obtaining rectangle complementary openings resonant ring 230.
Further, as shown in connection with fig. 1, photoelectricity transfiguration is embedded between two parties between the outer wall and inner wall of inner ring rectangle top
The anode of diode, the photoelectricity varactor connects the outer wall.The introducing of photoelectricity varactor, reduces to rectangle
The restriction of 230 size of complementary openings resonant ring.The photoelectricity varactor can be placed directly in the outer wall of inner ring rectangle top with
Between inner wall, due to the frequency of trap be not it is very high, in the working band of diode, so, the placement of diode is not to it
Performance impacts.
Antenna trap characteristic in usual Antenna Design will be once it is determined that will be no longer adjustable, photoelectricity transfiguration described in present embodiment
The setting of diode can introduce new current path, and the capacitance of diode affects the electric current flowing in access, so passing through
Double trap frequencies that antenna may be implemented in the capacitance of change diode are tunable.Since dimensional parameters are remote small in working band
In operation wavelength, therefore it can be equivalent to resonant tank outside radiated electromagnetic wave when Antenna Operation, it is suitable to introduce complementary openings resonant ring
In introducing secondary resonance on original resonant tank, certain working frequency range can be shielded, are added on complementary openings resonant ring
Varactor joined tunable capacitor in secondary resonance circuit, so the wave frequency of shielding can be adjusted, realize
Double traps are tunable.
In present embodiment, it can cause to incude resonance by the structure of rectangle complementary openings resonant ring 230, realize to 5G
The bis- traps of frequency range 3.3-3.6GHz and 4.4-5GHz；By increasing photoelectricity varactor, new electric current carrying pathway is generated, in fact
The trap of existing 3GHz-5GHz is adjustable.It is shown by simulation result, antenna described in present embodiment can in 3.1GHz-10.6GHz
Realize omnidirectional radiation.The structure of monopole antenna unit 200 described in present embodiment can be with existing common monopole sub-antenna
Basis introduces rectangle complementary openings resonant ring 230, is not changing primary antenna radiation patch size in conjunction with microwave resonance mechanism
In the case of, the achievable double traps of the present invention have very big innovative significance, and the design of its structure is simply convenient for answering in practice
With.Photoelectricity varactor can not only realize that trap is adjustable, can also be achieved directional diagram reconstruct, have very big innovative significance.
As an example, the feeder line 220 is fed including 50 Ω coaxial waveguides.Feeder line 220 is realized by way of asymptote
The impedance matching coaxial to 50 Ω of spade paster antenna, is effectively reduced return loss, enable the electromagnetic wave energy of coaxial waveguide compared with
Big is radiated by spade paster antenna.
Further, as shown in connection with fig. 2, the antenna floor 300 is located at the bottom section of 100 lower surface of medium substrate, described
The two sides of bottom section are rectangle region 310, setting decoupling resonant ring 320 between two rectangle regions.
Rectangle region 310 is the floor of antenna, and the setting on floor is mainly formed into a loop with feeder line 220, and electromagnetic wave is made to exist
It is propagated between feeder line 220 and rectangle region 310, while the increase of floor area can be improved the gain of antenna, but can also increase simultaneously
Add the coupling between two antenna elements, so setting decouples resonant ring 320 to realize the decoupling between Unit two, working principle
It is the half for making the equivalent current path for decoupling resonant ring decouple wavelength, when electromagnetic wave is from antenna element one to antenna list
When member two couples, cause to resonate on decoupling resonant ring, efficiently reduces electromagnetic energy and transmitted to unit two, to realize list
Decoupling between member, decoupling resonant ring 320 increases the transmission path of electric current by being bent in present embodiment, realizes miniaturization.
In present embodiment, the paster structure of monopole antenna unit 200 can be spade structure, in medium substrate 100
The back side by decoupling resonant ring 320 realize two monopole antenna units 200 decoupling.
Further, as shown in connection with fig. 2, the decoupling resonant ring 320 is in rectangle outer profile, and the middle section setting of top lacks
Mouthful；The left side and the right are arranged picture in mirror image；The left side is sequentially connected by multiple semi arches and is formed.
In present embodiment while increasing electric current carrying pathway, the curved design for decoupling resonant ring can introduce multiple post
It is raw inductively or capacitively to introduce multistage resonant, there is broader decoupling bandwidth, it is full on 3.1-10.6GHz to realize antenna
Foot forward direction transmission coefficient is less than 15dB.
As an example, the multiple semi arch includes four semi arches.
The equivalent current path of decoupling resonant ring be the half of decoupling wavelength, the bending energy of circular arc area occupied not
In the case where change, significantly increase length, when Antenna Operation is near resonance point, an antenna element is coupled to decoupling resonance
It is big reversed that the electric current of ring and another antenna are coupled to electric current thereon etc., so that SRR structure frequency range near resonance point reduces
Intercoupling between antenna element.
Further, the medium substrate 100 includes FR4 medium substrate, dielectric constant 2.65, with a thickness of 0.8mm,
Loss angle tangent is 0.02；The metal patch includes copper patch.Using FR4 medium substrate purpose there are two: first is that FR4 be situated between
Matter substrate is relatively common, is more common antenna material inexpensively；Second is that the dielectric constant of FR4 is only 2.65, and inventive antenna
In 44x30mm2, i.e., it is adjustable to can be achieved with the bis- traps of ultra wide band MIMO under the size of 0.34 wavelength x0.23 wavelength, further proves
The decoupling effect of this product is good.
As an example, a length of 8.5mm in the outer ring rectangular horizontal direction of the rectangle complementary openings resonant ring 230, width are
9mm, the seal ring thickness of outer ring rectangle are 0.1mm, and the opening of outer ring rectangle is 3.5mm；The rectangle complementary openings resonant ring 230
Inner ring rectangular horizontal direction a length of 7.3mm, width 7.8mm, the seal ring thickness of inner ring rectangle is 0.1mm, inner ring rectangle
Opening is 3.5mm.
In present embodiment, the size of rectangle complementary openings resonant ring 230 can according to need and be finely adjusted, it is above-mentioned right
The selection of specific size, can preferably realize inventive antenna double traps and double notch bandwidths.
The length of complementary openings resonant ring 230, height, gap have codetermined the electrical length of complementary openings resonant ring, certainly
The frequency of trap is determined, the width of complementary openings resonant ring can regulate and control the notch bandwidth of complementary resonance ring, due to needing to add light
Electric diode, so width can not be too narrow, since inventive antenna will realize double trap characteristics, the bandwidth of double traps all compared with
It is narrow, therefore the width of its corresponding complementary resonance ring can not be too wide.
As an example, following a length of 7mm of the decoupling resonant ring 320, the long 9.3mm of the span on the left side and the right, top
The notch 1.35mm in middle section, the seal ring thickness of decoupling resonant ring 320 are 0.11mm；320 left side of decoupling resonant ring or the right
Semicircle arc radius be 0.55mm.
The size of the decoupling resonant ring 320 is finely adjusted as needed, it can be achieved that two monopole antenna units 200
In the decoupling of 3.1-10.6GHz.By theory analysis and emulation, the side for decoupling 320 left and right sides of resonant ring is designed to semicircle
The sequentially connected arc-shaped edges of arc can meet antenna on 3.1-10.6GHz simultaneously | S11 | < -10dB and | S21 | < -15dB.Input
Reflection coefficient S11It meets the requirements and refers to, signal can be radiated largely by antenna, and the electromagnetic wave loss reflected is smaller；
Positive transmission coefficient S21It meets the requirements and refers to, the signal that antenna element one is issued at work is normal to antenna element two
Work not will cause tremendous influence, meet insulated degree requirement.The annular radii for adjusting decoupling resonant ring 320 can effectively increase electricity
Size, to adjust the centre frequency of decoupling resonant ring work on a large scale, the aperture slots width for adjusting decoupling resonant ring can be micro-
The working frequency for adjusting decoupling resonant ring, due to introducing circular ring structure, so the width of decoupling resonant ring cannot be too wide, to guarantee
Surface current is flowed along micro-strip.
The present invention is in order to reduce intercoupling between antenna element in existing UWB-MIMO antenna model, in 3.1-
Realized in 10.6GHz frequency range | S21 | < -15dB increases decoupling resonant ring 320 between floor to improve UWB-MIMO antenna
Isolation.After introducing decoupling resonant ring 320, a resonance is introduced in the low-frequency range of antenna operating band, it is attached in this resonance point
An antenna element is coupled to electric current on decoupling resonant ring 320 in nearly frequency range and another antenna element is coupled to electricity thereon
Stream etc. is big reversed, so that decoupling 320 structure of resonant ring frequency range near the resonance point reduces intercoupling between antenna element, it is real
The decoupling of UWB-MIMO antenna is showed.
From the figure 3, it may be seen that low-frequency range (3.12GHz) and Mid Frequency of the SRR structure of addition in the working band of antenna
(7.22GHz) introduces a resonance respectively, and an antenna element is coupled to decoupling resonant ring in frequency range near this resonance point
On electric current and another antenna element to be coupled to electric current thereon etc. big reversed, thus SRR structure frequency range near resonance point
Intercoupling between antenna element is reduced, the decoupling of ultra wide band mimo antenna is realized.
Known by Fig. 4, after etching CSRR slot in the radiation patch of spade ultra wide band mimo antenna, in 3.47GHz and
4.70GHz two frequency bins are nearby in frequency range | S11| it is obvious to be deteriorated, apparent dual-attenuation is presented, shows the complementary openings of etching
Resonance annular groove has reached the target of double traps.
Known by Fig. 5, after etching CSRR slot in the radiation patch of spade-type ultra wide band mimo antenna, S21In 3.47GHz and
4.70GHz two frequency bins nearby have big ups and downs, also demonstrate double trap characteristics of complementary openings resonant ring.
Fig. 6 to Fig. 8 gives spade ultra wide band the mimo antenna face E (face xoz) and H at 3.2GHz, 6.5GHz and 10GHz
The directional diagram in face (face xoy), as seen from the figure, this antenna can cover omnidirection at 3.2GHz, 6.5GHz and 10GHz, meet
The design requirement of UWB-MIMO antenna.
Fig. 9 and Figure 10 provides the S before and after load diode11And S21Curve, it can be seen that double with the variation of capacitance
The frequency of trap can also change, and maximal regulated range can reach 5.2GHz.
The trap added after 0.3pF diode in complementary openings resonance ring structure inner ring is set forth in Figure 11 to Figure 13
The directional diagram in spade UWB-MIMO the antenna face E (face xoz) and the face H (face xoy) at 3.2GHz, 6.5GHz and 10GHz.By scheming
Know, after adding diode, the directional diagram of UWB-MIMO antenna has almost no change, the spoke at 3.2GHz, 6.5GHz and 10GHz
It penetrates and remains to covering omnidirection, become 2.04dBi, 5.74dBi, 3.89dBi in the gain of three Frequency points.
The present invention is application of the Electromagnetic Field and Microwave Technology in field of antenna.By the reasonable arrangement in structure, realize
Achieve the purpose that double traps in the case that existing antenna size is constant；Double fall into is realized by the photoelectricity varactor being arranged again
Wave is adjustable；The present invention not only enriches the function of antenna, has widened its use scope, has also reached the mesh of the miniaturization of antenna
's.
Although describing the present invention herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that can be carried out to exemplary embodiment
Many modifications, and can be designed that other arrangements, without departing from spirit of the invention as defined in the appended claims
And range.It should be understood that different appurtenances can be combined by being different from mode described in original claim
Benefit requires and feature described herein.It will also be appreciated that the feature in conjunction with described in separate embodiments can be used
In other described embodiments.
Claims (10)
1. a kind of tunable ultra wide band mimo antenna based on complementary openings resonant ring, including medium substrate (100), medium substrate
(100) upper and lower surfaces cover metal patch, which is characterized in that the metal patch of upper surface includes two and is placed in parallel
Monopole antenna unit (200), the metal patch of lower surface include antenna floor (300),
The monopole antenna unit (200) includes radiating element (210) and the feeder line that connect between two parties with radiating element bottom end
(220), radiating element (210) is rectangle, two angle unfilled corners triangular in shape below radiating element (210)；Feeder line (220) is served as reasons
The isosceles trapezoid widened up to lower gradual change；The rectangle that setting two is placed with one heart in the top half of radiating element (210) is complementary
Split ring resonator (230), the rectangle complementary openings resonant ring (230) are position-movable in radiating element (210).
2. the tunable ultra wide band mimo antenna according to claim 1 based on complementary openings resonant ring, which is characterized in that
The following opening placed in the middle of the inner ring rectangle of the rectangle complementary openings resonant ring (230), the top of outer ring rectangle is open between two parties.
3. the tunable ultra wide band mimo antenna according to claim 2 based on complementary openings resonant ring, which is characterized in that
Photoelectricity varactor, the sun of the photoelectricity varactor are embedded between the outer wall and inner wall of inner ring rectangle top between two parties
Pole connects the outer wall.
4. the tunable ultra wide band mimo antenna according to any one of claim 1 to 3 based on complementary openings resonant ring,
It is characterized in that, the feeder line (220) feeds including 50 Ω coaxial waveguides.
5. the tunable ultra wide band mimo antenna according to claim 4 based on complementary openings resonant ring, which is characterized in that
The antenna floor (300) is located at the bottom section of medium substrate (100) lower surface, and the two sides of bottom section are rectangle region (310), and two
Setting decoupling resonant ring (320) between a rectangle region.
6. the tunable ultra wide band mimo antenna according to claim 5 based on complementary openings resonant ring, which is characterized in that
The decoupling resonant ring (320) is in rectangle outer profile, and notch is arranged in the middle section of top；The left side and the right set picture in mirror image
It sets；The left side is sequentially connected by multiple semi arches and is formed.
7. the tunable ultra wide band mimo antenna according to claim 6 based on complementary openings resonant ring, which is characterized in that
The multiple semi arch includes four semi arches.
8. the tunable ultra wide band mimo antenna according to any one of claim 1 to 3 based on complementary openings resonant ring,
It is characterized in that, the medium substrate (100) includes FR4 medium substrate, dielectric constant 2.65, with a thickness of 0.8mm, loss
Angle is just cut to 0.02；The metal patch includes copper patch.
9. the tunable ultra wide band mimo antenna according to claim 8 based on complementary openings resonant ring, which is characterized in that
A length of 8.5mm in the outer ring rectangular horizontal direction of the rectangle complementary openings resonant ring (230), width 9mm, the side of outer ring rectangle
Frame is 3.5mm with a thickness of 0.1mm, the opening of outer ring rectangle；The inner ring rectangular horizontal of the rectangle complementary openings resonant ring (230)
A length of 7.3mm in direction, width 7.8mm, the seal ring thickness of inner ring rectangle are 0.1mm, and the opening of inner ring rectangle is 3.5mm.
10. the tunable ultra wide band mimo antenna according to claim 9 based on complementary openings resonant ring, feature exist
In, following a length of 7mm of decoupling resonant ring (320), the long 9.3mm of the span on the left side and the right, the notch in top middle section
1.35mm, the seal ring thickness of decoupling resonant ring (320) are 0.11mm；The semicircle on decoupling resonant ring (320) left side or the right
Arc radius is 0.55mm.
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| CN115603050A (en) * | 2022-12-13 | 2023-01-13 | 深圳市鑫龙通信技术有限公司（Cn） | Decoupling radiation unit and antenna |
| CN115603050B (en) * | 2022-12-13 | 2023-03-31 | 深圳市鑫龙通信技术有限公司 | Decoupling unit and antenna |
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Application publication date: 20191011 |