CN105990658A - Communication antenna, antenna system and communication device - Google Patents
Communication antenna, antenna system and communication device Download PDFInfo
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- CN105990658A CN105990658A CN201510051984.0A CN201510051984A CN105990658A CN 105990658 A CN105990658 A CN 105990658A CN 201510051984 A CN201510051984 A CN 201510051984A CN 105990658 A CN105990658 A CN 105990658A
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- 230000010363 phase shift Effects 0.000 claims description 15
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Abstract
The present invention relates to a communication antenna, an antenna system including the communication antenna, and a communication device including the antenna. The communication antenna comprises a first radiator having a first substrate and a first radiation fin arranged on the first substrate, wherein the first radiation fin has a first feed portion and a third feed portion; and a second radiator having a second substrate and a second radiation fin arranged on the second substrate, wherein the first radiation fin has a second feed portion and a fourth feed portion, the radiating surfaces of the first radiation fin and the second radiation fin are recessed surfaces, the first radiation fin and the second radiation fin respectively have corner cuts, and the first radiator and the second radiator are disposed in a lamination mode.
Description
Technical field
The present invention relates to a kind of antenna, especially relate to a kind of communication antenna, and use the sky of this communication antenna
Wire system and communication equipment.
Background technology
Antenna is the necessary component in wireless communication system, is used for launching and receiving electromagnetic wave.Antenna should
For systems such as broadcast and TV, point-to-point radio communication, radar and space probations.Along with radio communication
Developing rapidly of technology, the field involved by antenna technology is more and more extensive.In many special applications, right
More and more higher in the requirement of antenna performance.In modern communications, along with the raising of communication system integrated level,
Require that the antenna used has the spies such as high-gain, broadband or multiband, circular polarisation, miniaturization, wide covering
Point.
In the prior art, multiband (such as, two-band) antenna or multiband entelechy are used when needs
When changing antenna, it is common that realize different frequency ranges respectively by multiport, multiple antennas.In this case,
Generally also need to overlap signal processing apparatus to process different aerial signals or to use a set of signal processing more
Device time division multiplex ground processes and overlaps signal more.Therefore, multiband aerial of the prior art has antenna amount
The shortcomings such as many, structure is complicated, size is relatively big, polarization and gain performance difference.
Additionally, in application scenes, due to the wide-angle axle ratio of antenna under around large-area metal environment
The best with directional diagram out-of-roundness, thus wish that antenna has axle ratio and the directional diagram performance of improvement.
Summary of the invention
The technical problem to be solved is to provide a kind of two-band communication antenna, and further provides for one
Circular polarisation dual-band antenna system.
To this end, the invention provides a kind of communication antenna, containing the antenna system of this antenna, and containing this sky
The communication equipment of line.
This communication antenna that the present invention provides includes: the first radiant body, wherein the first radiant body includes first substrate
With the first radiation fin arranged on the first substrate, the first radiation fin has the first current feed department and the 3rd current feed department；With
And second radiant body, wherein the second radiant body includes second substrate and the second radiation fin being arranged on second substrate,
Second radiation fin has the second current feed department and the 4th current feed department, wherein, the radiating surface of the first radiation fin and the second radiation
The radiating surface of sheet is concave surface, and the first radiation fin and the second radiation fin each have corner cut, the second radiant body and first
Radiant body stacking ground is placed.
According to an aspect of the present invention, described first radiant body and described second radiant body realize two-band line respectively
Polarization.
According to an aspect of the present invention, described first radiant body and described second radiant body are operated in identical double frequency
Section.
According to an aspect of the present invention, described first radiant body realizes different linear polarizations from described second radiant body
Direction.
According to an aspect of the present invention, described first radiant body overlaps with the geometric center of described second radiant body.
According to an aspect of the present invention, described first radiation fin and described second radiation fin are the square with corner cut
Shape.
According to an aspect of the present invention, described first radiation fin has two corner cuts, and institute on the first diagonal
State the second radiation fin and there are on the second diagonal two corner cuts.
According to an aspect of the present invention, described first diagonal of described first radiation fin and described second radiation fin
Described second diagonal at an angle.
According to an aspect of the present invention, described first diagonal of described first radiation fin and described second radiation fin
Described second diagonal be mutually perpendicular to.
According to an aspect of the present invention, described first current feed department, described second current feed department and described 3rd feed
Portion, described 4th current feed department are coaxial feed portions.
According to an aspect of the present invention, the size of described first radiation fin is more than the size of described second radiation fin.
According to an aspect of the present invention, the dielectric constant of described second substrate is more than the dielectric constant of first substrate.
According to an aspect of the present invention, described first radiant body and the second radiant body are placed in cavity.
According to an aspect of the present invention, described cavity is circular cavity or rectangular cavities.
According to an aspect of the present invention, have between described first radiant body and the second radiant body and described cavity and fill out
Fill material.
According to an aspect of the present invention, described first substrate and second substrate are respectively rectangle.
According to an aspect of the present invention, described first substrate and second substrate are by electricity Jie doped with conductive micro structures
Matter base material is made.
According to an aspect of the present invention, described first radiant body and described second radiant body are electrically insulated from each other.
According to an aspect of the present invention, described first current feed department and described 3rd current feed department are arranged on described first spoke
Penetrate on the first axis of symmetry of sheet, be arranged on described second radiation fin with described second current feed department and described 3rd current feed department
The second axis of symmetry on, described first axis of symmetry is vertical with described second axis of symmetry.
According to an aspect of the present invention, described first current feed department and described 3rd current feed department are positioned at described first
In radiation fin horizontal symmetry axis and centrosymmetry, described second current feed department and described 4th current feed department are positioned at described second
In the vertical axis of symmetry of radiation fin and centrosymmetry.
According to an aspect of the present invention, described first radiation fin is arranged on described first substrate, described second spoke
Penetrate sheet to be arranged on described second substrate, and described second substrate is arranged on described first radiation fin.
According to an aspect of the present invention, also include that frequency selects antenna house, described frequency to select antenna house to be arranged at described communication
In the radiation direction of antenna.
This antenna system that the present invention provides includes: feed port；Power splitter, the first input of described power splitter
End is connected with described feed port；And the communication antenna as according to any one of claim 1 to 21, wherein,
Described power splitter is one point of four power splitter, and the first outfan of described power splitter is connected to by the first feeder line
Described second current feed department, the second outfan of described power splitter is connected to described first feedback by the second feeder line
Electricity portion, described power splitter the 3rd outfan is connected to described 4th current feed department, Yi Jisuo by the 3rd feeder line
State power splitter the 4th outfan and be connected to described 3rd current feed department, wherein said first feedback by the 4th feeder line
Electric line, described second feeder line, have between described 3rd feeder line and described 4th feeder line
Phase shift.
According to an aspect of the present invention, between described power splitter and described communication antenna, it is additionally provided with the phase shifter,
The described phase shifter makes described second feeder line, the 3rd feeder line and the 4th feeder line relative to described
One feeder line is respectively in 90 °, 180 °, 270 ° of phase shifts.
According to an aspect of the present invention, described second feeder line, described 3rd feeder line and described
The length of the 4th feeder line differs 1/4,1/2,3/4 compared with the length of described first feeder line respectively
Wavelength.
This communication apparatus that the present invention provides includes communication antenna as above or aerial system as above
System.
Due to the fact that the above technical scheme of employing, the most compared with prior art there is following remarkable advantage:
The communication antenna of the present invention uses two radiant bodies being arranged on Different Plane with overlapped way, can subtract
The volume of little communication antenna and size.By making each radiant body of antenna possess the radiating surface of concave surface, it is possible to carry
High radiation efficiency, and meet miniaturization and the conformalization design requirement of application circumstances further.Such as,
In the case of the radiating surface of the first radiation fin and the second radiation fin is concave surface, the first radiant body and the second radiant body
(and optional cavity bottom) can be conformal concave structure so that this communication antenna can be compacter.
Communication antenna in the present invention by radiation fin corner cut so that each radiation fin realizes two-band
Linear polarization.Additionally, the first radiant body and the second radiant body can be operated in identical two-band.By setting
Put the linear polarization direction of the first radiation fin and the second radiation fin, a communication antenna can be used to realize two-wire
Polarization two-band.
Further, the antenna system of the present invention is arranged by the relative position and feed-in arranging two radiant bodies
Phase shift between the pumping signal of four current feed departments on two radiant bodies, the first radiant body of stacking and
Two radiant bodies can form circular polarisation or elliptical polarized radiation signal.With prior art needs at two set signals
Reason device realizes two-band circular polarisation or processes two sets with using a set of signal processing apparatus time division multiplex
Signal is compared, and present invention decreases the volume of antenna system, weight and cost.Additionally, by being arranged on two
Four current feed departments on individual radiant body, additionally it is possible to the wide-angle axle ratio and the raising directional diagram that optimize antenna are non-round
Degree.
To sum up, the communication antenna of the present invention has that section is low, lightweight, volume is little, it is conformal to be prone to and batch
The advantages such as production, it is possible to realize two-band linear polarization or realize two-band circular polarisation the most further, simultaneously
The wide-angle axle ratio of antenna can be optimized and improve directional diagram out-of-roundness, can be widely applied to measure and logical
News every field.
Accompanying drawing explanation
For the above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing to this
Bright detailed description of the invention elaborates, wherein:
Fig. 1 illustrates the perspective view of communication antenna according to embodiments of the present invention.
Fig. 2 illustrates the plane graph of example communication antenna structure according to embodiments of the present invention.
Fig. 3 illustrates the plane graph of example communication antenna structure according to embodiments of the present invention, and it is with optional
Cavity and frequency select antenna house.
Fig. 4 illustrates the structural representation of antenna system according to embodiments of the present invention.
Fig. 5 A illustrates the voltage standing wave ratio curve chart of communication antenna according to embodiments of the present invention；
Fig. 5 B illustrates the voltage standing wave ratio curve chart of antenna system according to embodiments of the present invention；
Fig. 6 illustrates the gain curve figure of the antenna system of the embodiment of the present invention；
Fig. 7 illustrates that the axle of the antenna system of the embodiment of the present invention compares curve chart.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the invention will be further described, elaborates more in the following description
Many details so that fully understanding the present invention, but the present invention obviously can with multiple be different from this describe other
Mode is implemented, those skilled in the art can in the case of intension of the present invention according to practical situations
Make similar popularization, deduce, the most should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 1 illustrates the stereochemical structure signal of a kind of micro-strip communication antenna schematic diagram according to embodiments of the present invention
Figure.Fig. 2 illustrates the plane graph of example communication antenna structure according to embodiments of the present invention.With reference to Fig. 1
Shown in Fig. 2, the communication antenna 200 of the present embodiment is made up of the first radiant body 201 and the second radiant body 202,
Wherein the first radiant body 201 includes first substrate 21 and the first radiation fin 22, and the second radiant body includes second substrate
23 and second radiation fin 24.First radiant body 201 and the second radiant body 202 are arranged on different installation on surface.
Such as, the first radiant body 201 and the second radiant body 202 can be placed by overlapped way.Specifically, can be by first
Radiation fin 22 is arranged on first substrate 21, is arranged on second substrate 23 by the second radiation fin 24, and will
Second substrate 23 is arranged on the first radiation fin 22, forms laminated construction in this way.Preferably, the first radiation
Body 201 overlaps with the geometric center of the second radiant body 202.Use laminated construction, it is possible to Reduced Design structure, letter
Change manufacturing process and save space, it is achieved miniaturization further.
Substrate is made up of the dielectric substrate doped with conductive micro structures.Radiation fin is made of an electrically conducting material, such as,
It is made of metal.Radiation fin can be patch form, it is also possible to be the coating through chemical wet etching.First radiation fin
The geometry of 24 is not restricted, and example is square, as an alternative in the present embodiment, it is possible to for rectangle or its
His shape.The geometry of the second radiation fin 24 is not restricted, but is generally chosen for and the first radiation fin 22
Unanimously (include identical and symmetrical situation).
First radiation fin 22 has the first current feed department 25 and the 3rd current feed department 27, and the second radiation fin 24 has second
Current feed department 26 and the 4th current feed department 28.First current feed department the 25, the 3rd current feed department 27 and the second current feed department 26,
4th current feed department 28 can input signal to be sent, or the signal that output has received respectively.Preferably, first
Current feed department the 25, the 3rd current feed department 27 and the second current feed department the 26, the 4th current feed department 28 can be coaxial feed portion.
Use the mode of coaxial feed, reduce the interference of feed structure.First current feed department 25 and the 3rd current feed department 27
Being arranged on the first axis of symmetry of the first radiation fin, the second current feed department 26 and the 4th current feed department 28 are arranged on the second spoke
Penetrating on the second axis of symmetry of sheet, the first axis of symmetry is vertical with described second axis of symmetry.Such as, the first current feed department 25
It is positioned in horizontal symmetry axis X1 or vertical axis of symmetry Y1 of the first radiation fin 22 with the 3rd current feed department 27.The
Two current feed departments 26 and the 4th current feed department 28 are positioned at horizontal symmetry axis X2 or the vertical symmetry of the second radiation fin 24
On axle Y2.With reference to shown in Fig. 2, for simplicity, the first current feed department 25 and the 3rd current feed department 27 are positioned at the
In horizontal symmetry axis X1 of one radiation fin 22 and centrosymmetry, and the second current feed department 26 and the 4th current feed department 28
It is positioned in vertical axis of symmetry Y2 of the second radiation fin 24 and centrosymmetry.It should be noted that four shown in figure feedback
The position in electricity portion 25,26,27 and 28 is schematic, and embodiments of the invention do not limit the first current feed department
25 and the 3rd current feed department 27 and the second current feed department 26 and the 4th current feed department 28 on horizontal plane (paper in Fig. 2)
Relative position, if first current feed department the 25, the 3rd current feed department the 27, second current feed department 26 and the 4th in engineering
Current feed department 28 can each draw transmission line (not shown).Additionally, embodiments of the invention do not limit
First current feed department 25 and the 3rd current feed department 27 and the second current feed department 26 and the 4th current feed department 28 are respectively at the first spoke
Penetrate sheet 22 and the center of the second radiation fin 24.Present invention also contemplates the first current feed department 25 and the 3rd feed
Portion 27 and the second current feed department 26 are permissible with the mutual alignment relation on the 4th current feed department 28 its radiation fin of each leisure
Change, i.e. the line of the first current feed department 25 and the 3rd current feed department 27 can deviate the center of the first radiation fin 22,
The line of the second current feed department 26 and the 4th current feed department 28 can deviate the center of the second radiation fin 24.Additionally, this
Invention also contemplate these four current feed departments relative to invariant position but can be with overall offset.
As shown in Figure 1, 2, it is preferable that the size of the first radiation fin 22 is more than the size of the second radiation fin 24.
Fig. 2 illustrates that the size of the first radiation fin 22 is more than the size of the second radiation fin 24 so that the second radiation fin 24 does not hides
Keep off the example of the first radiation fin 22.Moreover it is preferred that the dielectric constant of the material of second substrate 23 is more than first
The dielectric constant of substrate 21.Make the size of the first radiation fin 22 more than the second radiation fin 24 and second substrate
The dielectric constant of 23 is more than the dielectric constant of first substrate 21.
First radiation fin 22 and the second radiation fin 24 each can have corner cut, i.e. excise radiation fin certain/some
Angle or portion of material.Made by the geometric shape (size of corner cut, position, excision angle etc.) controlling corner cut
First radiation fin and the second radiation fin each realize two-band linear polarization, and can control the frequency range position of two-band.
In one embodiment, the first radiation fin 22 and the second radiation fin 24 are rectangular radiation patch, its each comfortable excision one
Behind two diagonal angles on bar diagonal hexagonal.Such as, the first radiation fin 22 has at the first diagonal A two
Corner cut 22a of side and 22b, similar, the second radiation fin 24 has in the second diagonal B both sides corner cut 24a
And 24b.In a preferred embodiment, it is preferable that each corner cut 22a, 22b, 24a and 24b angle 35
Degree is chosen between 55.It is highly preferred that the angle of each corner cut 22a, 22b, 24a and 24b is 45 degree.Permissible
Being understood by, corner cut can also be other angle.Preferably, the shape of all corner cuts 22a, 22b, 24a and 24b
Shape is identical.
When applying excitation by feed port, first radiant body 201 and each work of the second radiant body 202
As linearly polarized radiation unit.According to embodiments of the invention, by the first radiant body 201 and the second radiant body 202
Put so that the first diagonal A and the second diagonal B is at an angle.Preferably, the first radiant body 201 and
Two radiant bodies 202 are put so that the first diagonal A and the second diagonal B is orthogonal.It is appreciated that at this
In other embodiments of invention, the first radiation fin 22 and respective two corner cuts of the second radiation fin 24 can not be right
On linea angulata.By controlling the first radiation fin 22 and corner cut of the second radiation fin 24, the first radiant body 201 and second
Two-band linear polarization signal, and the first radiant body 201 and the second radiation each can be launched/receive to radiant body 202
Body 202 can be operated in identical two-band.Owing to the first diagonal A and the second diagonal B becomes certain angle
Degree, the linear polarization signal of the first radiant body 201 and the second radiant body 202 can shape in the case of having phase shift each other
Become elliptic polarization or circular polarization radiation signal.Especially vertical as the first diagonal A and the 2nd B at corner cut place
Time, two linear polarizations can be made to be in orthogonal state, i.e. one is horizontal polarization, one is vertical pole
Change, thus form good circular polarization radiation signal.
Further, feeding network is passed through so that be fed between four pumping signals of four current feed departments have 90 °
Phase shift.For example, with the pumping signal of the second current feed department 26 of being fed to the second radiant body 202 for reference to 0
° phase place, the first current feed department 25 has 90 ° of phase shifts relative to the second current feed department 26, the 4th current feed department 28 relative to
Second current feed department 26 has 180 ° of phase shifts, and the 3rd current feed department 27 has 270 ° of phase shifts relative to the second current feed department 26.
When applying excitation by current feed department, each work of the first radiant body 201 and the second radiant body 202 is line pole
Change radiation element.According to embodiments of the invention, in order to realize circular polarisation communication antenna, by the first radiant body 201
Put into the second radiant body 202 and make the first diagonal A and the second diagonal B orthogonal.Such set
Put the linearly polarized wave sent so that the first radiant body 201 and the second radiant body 202 orthogonal, such as, first
Radiant body 201 sends horizontal polarized wave, and the second radiant body 202 sends vertically polarized wave, and vice versa.Further,
Pass through feeding network so that be fed to the pumping signal of the first radiant body 201 and be fed to the second radiant body 202
Pumping signal between have 90 ° or the phase shift of 270 °, this makes the first radiant body 201 and the second radiant body 202
The linearly polarized wave phase with one another sent differs 90 °.First radiant body 201 and the second radiant body 202 send
Amplitude is equal, phase 90 °, and the most mutually orthogonal line polarization wave synthesizes circularly polarised wave.
In the example embodiment of Fig. 1 and 2, with the first diagonal A and the second pendulum orthogonal for diagonal B
The line polarization wave that the mode of putting achieves the first radiant body 201 and the second radiant body 202 is orthogonal.But, ability
Field technique personnel, it is understood that depend on the concrete geometry of radiation fin 22 and 24, can take difference
Disposing way, as long as the first radiant body 201 and the second radiant body 202 can send the line polarization wave of orthogonal space i.e.
Can.
In order to improve radiation efficiency further and meet miniaturization and the conformalization design need of application circumstances
Asking, the first radiant body 201 and the second radiant body 202 can be fabricated to have concave surface by embodiments of the invention.
Such as, first substrate 21 and second substrate 23 are fabricated to have concave surface, coplanar spoke is set the most thereon
Penetrate sheet 22 and 24.Fit because of its similar 3D shape between these structure sheafs.
Communication antenna 200 compact conformation as above, and each radiation fin and substrate can have conformal knot
Structure, reduces the size of communication antenna, improves integrated level.On the other hand, by the first radiation fin 22 He
Arranging corner cut on second radiation fin 24, each radiation fin can realize two-band linear polarization, and can on-demand control
Make the first radiation fin 22 and the working frequency range of the second radiation fin 24 and linear polarization direction, such that it is able to use one to lead to
Letter antenna 200 realizes dual-linear polarization two-band.Additionally, by four feeds being arranged on two radiant bodies
Portion, it is possible to optimize the wide-angle axle ratio of antenna and improve directional diagram out-of-roundness.
Fig. 3 illustrates the plane graph of example communication antenna structure according to embodiments of the present invention, and it is with optional
Cavity 300 and frequency select antenna house 310.As it is shown on figure 3, the communication antenna 200 described in Fig. 2 can be combined
Place in cavity 300.Wherein cavity 300 is in the radiation direction upper shed of communication antenna 100.Cavity 300
Effect include but not limited to: supporting communication antenna 200, make communication antenna exempt to be affected by the surrounding environment and artificially
The impact etc. of operation.The shape of cavity 300 is not restricted, and can be rectangle, square, it is also possible to be circular.Chamber
The shape of body 300 can be corresponding with the shape of the first radiant body and the second radiant body, it is also possible to the most corresponding.Such as,
First radiant body and the second radiant body can be rectangles, and cavity 300 is also rectangle.And for example, the first radiant body and
Two radiant bodies can be rectangle, and cavity 300 can be circular.The material of cavity 300 is not restricted, usually
Metal, but also can be the nonmetallic materials being suitable for carrying out demand.In the case of cavity 300 is conductive material, micro-
The sidewall of cavity 300 is not the most contacted with antenna 200.Alternatively, can cavity 300 with communicate
It is appropriately arranged with packing material, preferably to play fixing, damping and/or supporting role between antenna 200.Such as,
Foam-filled material can be placed to fill the space between communication antenna 100 and cavity 300 in cavity 300, anti-
Only communication antenna 100 air pressure in use is unstable.In one embodiment, the first spoke of communication antenna 200
Can be conformal concave structure bottom beam 201 and the second radiant body 202 and cavity 300 so that this is logical
Letter antenna can be compacter.
In one alternate embodiment, antenna house 310 can be set in the radiation direction of communication antenna 200.
Antenna house 310 can be fixed to the substrate of communication antenna 200, or can in the case of having cavity 300
The opening of cavity 300 is covered to be fixed to cavity 300.Although antenna house 310 shown in figure is protruding
Shape, it will be appreciated by a person skilled in the art that antenna house 310 can be set to into communication antenna 100 and/
Or cavity 300 conformal (such as, concave surface), fully to meet the requirement of miniaturization.Antenna house 310 also may be used
There is other shapes, such as tabular.Antenna house 310 can be that communication antenna 200 provides protective action,
And preferably there is good wave transparent performance, thus do not affect the signal radiation/reception of communication antenna 200.
In a further embodiment, antenna house 310 can be that frequency selects antenna house 310.Frequency selects antenna house 310
There is good wave transparent performance and intended electromagnetic response can be produced, thus controlling electromagnetic wave propagation.
Fig. 4 illustrates the schematic diagram of antenna system according to embodiments of the present invention.Antenna system bag shown in Fig. 4
Include the feed port 410 of front end, one point of four power splitter 420, the first feeder line 430a, the second feed line
Road 430b, the communication antenna 200 described in the 3rd feeder line 430c and the 4th feeder line 430d and Fig. 2.
The feeding network of antenna system includes: feed port 410, one point of four power splitter 420, the first feeder line
430a, the second feeder line 430b, the 3rd feeder line 430c and the 4th feeder line 430d.Wherein,
First feeder line 430a and the 3rd feeder line 430c is respectively fed into the second current feed department 26 and the 4th current feed department
28, the second feeder line 430b and the 4th feeder line 430d is respectively fed into the first current feed department 25 and the 3rd
Current feed department 27.Wherein the first feeder line 430a, the second feeder line 430b, the 3rd feeder line 430c
With the 4th have phase shift between feeder line 430d.
In one embodiment, can be by being arranged on the phase shifter of power splitter 420 and communication antenna 200 (not
Illustrate) so that the second feeder line 430b, the 3rd feeder line 430c and the 4th feeder line 430d phase
For the first feeder line 430a respectively in 90 °, 180 °, 270 ° of phase shifts.It is fed to first by making
First current feed department 25 of radiant body 201 and the phase 180 ° of the pumping signal of the 3rd current feed department 27, feeding
To the second current feed department 26 of the second radiant body 202 and the phase 180 of the pumping signal of the 4th current feed department 28
°, it is achieved the circular polarisation mode of operation of antenna.To sum up, the communication antenna 200 first radiant body 201 by stacking
Dual-linear polarization two-band can be realized with the second radiant body 202.By making feed-in the second current feed department 26, first
The phase place of current feed department the 25, the 4th current feed department 28 and the 3rd current feed department 27 pumping signal differs 90 ° respectively can
Form circular polarization radiation signal.Therefore, the antenna system of the present invention is capable of two-band circular polarisation.Additionally, with
Only arranging a current feed department on each radiation fin to compare, the present invention improves big angle by using four current feed departments
Spend axle ratio and improve directional diagram performance.
In one embodiment, can be by making the second feeder line, the 3rd feeder line and the 4th feed
The length of circuit differs 1/4,1/2,3/4 wavelength compared with the length of the first feeder line respectively, it is achieved signal
Different by the phase place after these feeder lines in transmission.
Additionally, power splitter 420 can use microstrip line merit point mode, to save space and effectively to alleviate the weight of system
Amount.
Therefore, it is possible to only realize two-band circular polarisation with a set of signal processing apparatus, enormously simplify antenna
Structure, reduces cost.The communication antenna of the above embodiment of the present invention or antenna system can be combined in communication apparatus,
Thus send/receive signal for communication apparatus.
Fig. 5 A illustrates the radiation voltage standing-wave ratio curve chart of communication antenna 100 according to embodiments of the present invention,
Wherein transverse axis is frequency, and the longitudinal axis is voltage standing wave ratio (VSWR) real part.Voltage standing wave(VSW) as shown in Figure 5A
Ratio shows that communication antenna 200 (or one of them radiant body 201 or 202) as described in Figure 1 is receiving one
Can realize the radiation of linear polarization two-band in the case of the pumping signal of road, it has good electricity in two frequency ranges
Pressure standing-wave ratio.
Fig. 5 B shows the reception voltage standing wave ratio curve chart of antenna system according to an embodiment of the invention, wherein
Transverse axis is frequency, and the longitudinal axis is voltage standing wave ratio (VSWR) real part.Voltage standing wave ratio shown in Fig. 5 B illustrates
The signal warp that the communication antenna 200 (including two antenna radiators) of antenna system as shown in Figure 4 receives
The signal that power splitter 420 exports in feed port 410 after converging, it has well on whole working frequency range
Voltage standing wave ratio.
Fig. 6 illustrates the gain curve figure of the antenna system of the embodiment of the present invention, and wherein transverse axis is the angle of pitch (spending),
The longitudinal axis is far gain.As it can be seen, according to the example embodiment communication antenna of the present invention ± 75 ° of pitching
Good gain is realized in angle range.
Fig. 7 illustrate the axle of the antenna system of the embodiment of the present invention than curve chart, wherein transverse axis is azimuth (spending),
The longitudinal axis is far field axle ratio.Axle is than the degree characterizing antenna circular polarisation.As it can be seen, according to the example of the present invention
The communication antenna of embodiment is in ± 75 ° of azimuth coverages, it is achieved axle ratio, less than or equal to 5, has been reached good
Circular polarisation performance.
Performance curve in conjunction with Fig. 5 to Fig. 7, it is known that the communication antenna in the present invention is by can to radiation fin corner cut
So that each radiation fin realizes two-band linear polarization.Additionally, the first radiant body and the second radiant body can be operated in
In identical two-band.Further, the antenna system of the present invention is by making feed-in be arranged on two radiant bodies
The pumping signal of four current feed departments phase shift 90 ° each other, the first radiant body and second radiant body of stacking can be formed
Circular polarisation or elliptical polarized radiation signal.It is round to realize two-band with prior art needs two set signal processing apparatus
Polarize or process two set signals with using a set of signal processing apparatus time division multiplex and compare, present invention decreases sky
The volume of wire system, weight and cost.Additionally, the present invention is by using four current feed departments can improve wide-angle
Axle ratio and improve directional diagram performance.
Communication antenna and/or the antenna system of the above embodiment of the present invention can be combined in communication equipment.
Section is low, lightweight, volume is little, it is conformal to be prone to and batch raw owing to having for the communication antenna of the present invention
Produce advantage, can be widely applied to measure and communication every field.The communication antenna application of the embodiment of the present invention
Scope is more extensive, can apply to the field such as mobile communication, satellite navigation.
The antenna that the present invention provides includes two radiant bodies being arranged on Different Plane with overlapped way, by setting
Put the phase shift between relative position and four feeder lines of two radiant bodies, can realize circular polarisation and
Two-band, and the wide-angle axle ratio of antenna can be optimized and improve directional diagram out-of-roundness.Additionally, and
By making each radiant body of antenna possess concave, it is possible to increase radiation efficiency, and meet further
The miniaturization of application circumstances and conformalization design requirement.Use laminated construction, it is possible to Reduced Design structure,
Simplify manufacturing process and save space, it is achieved miniaturization further.
Although the present invention describes with reference to current specific embodiment, but common skill in the art
Art personnel are it should be appreciated that above embodiment is intended merely to the present invention is described, without departing from present invention essence
Change or the replacement of various equivalence also can be made, therefore, as long as at the connotation of the present invention in the case of god
In the range of change, the modification of above-described embodiment all will be fallen in the range of following claims.
Claims (26)
1. a communication antenna, it is characterised in that including:
First radiant body, wherein the first radiant body includes first substrate and arranges the first radiation on the first substrate
Sheet, the first radiation fin has the first current feed department and the 3rd current feed department；And
Second radiant body, wherein the second radiant body includes second substrate and the second radiation being arranged on second substrate
Sheet, the second radiation fin has the second current feed department and the 4th current feed department,
Wherein, the radiating surface of the first radiation fin and the radiating surface of the second radiation fin are concave surface, the first radiation fin and
Second radiation fin each has corner cut, the second radiant body and the first radiant body stacking ground and places.
2. communication antenna as claimed in claim 1, it is characterised in that described first radiant body and described second
Radiant body realizes two-band linear polarization respectively.
3. communication antenna as claimed in claim 2, it is characterised in that described first radiant body and described second
Radiant body is operated in identical two-band.
4. communication antenna as claimed in claim 2, it is characterised in that described first radiant body and described second
Radiant body realizes different linear polarization directions.
5. communication antenna as claimed in claim 1, it is characterised in that described first radiant body and described second
The geometric center of radiant body overlaps.
6. communication antenna as claimed in claim 1, it is characterised in that described first radiation fin and described second
Radiation fin is the rectangle with corner cut.
7. communication antenna as claimed in claim 6, it is characterised in that described first radiation fin is at the first diagonal angle
There are on line two corner cuts, and described second radiation fin has two corner cuts on the second diagonal.
8. communication antenna as claimed in claim 7, it is characterised in that described the first of described first radiation fin
Diagonal is at an angle with described second diagonal of described second radiation fin.
9. communication antenna as claimed in claim 8, it is characterised in that described the first of described first radiation fin
Diagonal is mutually perpendicular to described second diagonal of described second radiation fin.
10. micro-strip communication antenna as claimed in claim 1, it is characterised in that described first current feed department, institute
State the second current feed department and described 3rd current feed department, described 4th current feed department is coaxial feed portion.
11. communication antennas as claimed in claim 1, it is characterised in that the size of described first radiation fin is big
Size in described second radiation fin.
12. communication antennas as claimed in claim 11, it is characterised in that the dielectric of described second substrate is normal
Number is more than the dielectric constant of first substrate.
13. communication antennas as claimed in claim 1, it is characterised in that described first radiant body and the second spoke
Beam is placed in cavity.
14. communication antennas as claimed in claim 1, it is characterised in that described cavity is circular cavity or square
Shape cavity.
15. communication antennas as claimed in claim 14, it is characterised in that described first radiant body and second
Between radiant body and described cavity, there is packing material.
16. communication antennas as claimed in claim 1, it is characterised in that described first substrate and second substrate
It is respectively rectangle.
17. communication antennas as claimed in claim 1, it is characterised in that described first substrate and second substrate
It is made up of the dielectric substrate doped with conductive micro structures.
18. communication antennas as claimed in claim 1, it is characterised in that described first radiant body and described
Two radiant bodies are electrically insulated from each other.
19. communication antennas as claimed in claim 1, it is characterised in that wherein, described first current feed department and
Described 3rd current feed department is arranged on the first axis of symmetry of described first radiation fin, with described second current feed department and described
3rd current feed department is arranged on the second axis of symmetry of described second radiation fin, described first axis of symmetry and described second right
Claim axle vertical.
20. communication antennas as claimed in claim 1, it is characterised in that wherein, described first current feed department and
Described 3rd current feed department is positioned in described first radiation fin horizontal symmetry axis and centrosymmetry, described second feed
Portion and described 4th current feed department are positioned in the vertical axis of symmetry of described second radiation fin and centrosymmetry.
21. communication antennas as claimed in claim 1, it is characterised in that described first radiation fin is arranged on institute
Stating on first substrate, described second radiation fin is arranged on described second substrate, and described second substrate is arranged on
On described first radiation fin.
22. communication antennas as claimed in claim 1, it is characterised in that also include that frequency selects antenna house, described
Frequency selects antenna house to be arranged in the radiation direction of described communication antenna.
23. 1 kinds of antenna systems, it is characterised in that including:
Feed port；
Power splitter, the first input end of described power splitter is connected with described feed port；And
Communication antenna as according to any one of claim 1 to 22,
Wherein, described power splitter is one point of four power splitter, and the first outfan of described power splitter is by the first feed
Connection is to described second current feed department, and the second outfan of described power splitter is connected to by the second feeder line
Described first current feed department, described power splitter the 3rd outfan is connected to described 4th feed by the 3rd feeder line
Portion, and described power splitter the 4th outfan is connected to described 3rd current feed department by the 4th feeder line, wherein
Described first feeder line, described second feeder line, described 3rd feeder line and described 4th feed
Phase shift is had between circuit.
24. antenna systems as claimed in claim 23, it is characterised in that described power splitter is logical with described
Being additionally provided with the phase shifter between letter antenna, the described phase shifter makes described second feeder line, the 3rd feeder line
With the 4th feeder line relative to described first feeder line respectively in 90 °, 180 °, 270 ° of phase shifts.
25. antenna systems as claimed in claim 23, it is characterised in that described second feeder line,
The length of described 3rd feeder line and described 4th feeder line and the length of described first feeder line
Compare and differ 1/4,1/2,3/4 wavelength respectively.
26. 1 kinds of communication equipments, it is characterised in that include leading to according to any one of claim 1 to 22
Antenna system according to any one of letter antenna or claim 23 to 25.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051984.0A CN105990658A (en) | 2015-01-30 | 2015-01-30 | Communication antenna, antenna system and communication device |
| PCT/CN2016/072510 WO2016119714A1 (en) | 2015-01-30 | 2016-01-28 | Communication antenna, antenna system and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051984.0A CN105990658A (en) | 2015-01-30 | 2015-01-30 | Communication antenna, antenna system and communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105990658A true CN105990658A (en) | 2016-10-05 |
Family
ID=57036553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510051984.0A Pending CN105990658A (en) | 2015-01-30 | 2015-01-30 | Communication antenna, antenna system and communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105990658A (en) |
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| WO2019242130A1 (en) * | 2018-06-22 | 2019-12-26 | 深圳市大疆创新科技有限公司 | Dual-frequency circularly-polarized antenna and communication device |
| CN110945375A (en) * | 2017-07-31 | 2020-03-31 | 大金工业株式会社 | Sensor unit and air conditioner |
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