CN107611599A - A kind of circular polarized antenna - Google Patents
A kind of circular polarized antenna Download PDFInfo
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- CN107611599A CN107611599A CN201710664155.9A CN201710664155A CN107611599A CN 107611599 A CN107611599 A CN 107611599A CN 201710664155 A CN201710664155 A CN 201710664155A CN 107611599 A CN107611599 A CN 107611599A
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Abstract
The invention discloses a kind of circular polarized antenna, it is related to antenna technical field.The antenna includes feed section and radiant body, and the radiant body includes：First medium plate, the positive and negative of first medium plate are symmetrically covered with N to arc metal plate, wherein, N >=4 and the integral multiple for 4；3rd dielectric-slab, the positive and negative of the 3rd dielectric-slab are symmetrically covered with M to arc metal plate, and M=N, M are to arc metal plate and N to arc metal plate position correspondence and oppositely oriented；Second medium plate, multiple second medium plates by N to arc metal plate with M is corresponding to arc metal plate connects as one, form the stereo spiral ring of closing；The feed section carries out couple feed by metal patch to helical ring；Wherein, first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab set gradually and fixed from top to bottom, have gap between the 4th dielectric-slab and the 3rd dielectric-slab.Pass through above-mentioned technical proposal, realize broad beam performance and the miniaturization of circular polarized antenna.
Description
Technical field
The present invention relates to antenna technical field, more particularly to a kind of circular polarized antenna.
Background technology
Antenna is indispensable important component in radio communication and detection system, and it is transmitting and receives electromagnetism
A kind of equipment of ripple.With the development of wireless communication technology and the popularization of wireless application product, particularly alignment system in recent years
Extensive use and permeate higher requirement proposed to the combination property of antenna in life, people.Circularly polarised wave communication process
In run into the characteristic that there is back wave caused by chaff interference rotation direction to reverse, therefore circular polarized antenna is done in communication, GPS, electronics
Disturb and be widely used in being investigated with electronics, spiral is conventional circular polarized antenna form.The coverage internal antenna of satellite communication
Good conformity power with uniform amplitude response and to various environment, therefore required antenna is broad beam antenna, with existing
For the growth requirement of wireless communication system miniaturization, the Miniaturization Design of antenna is also particularly important and urgently.
In circular polarized antenna, for axle than the characterization parameter for its circular polarization characteristics, broad beam antenna requires that 3dB axles compare wave beam
Width is very big, general to be obtained using the floor larger to antenna increase or using four arm spiral forms, but this generally also makes
Obtaining the size of antenna becomes not being suitable for miniaturized system.
The content of the invention
The purpose of the embodiment of the present application is to provide a kind of circular polarized antenna based on planar metal spiral ring structure, the entelechy
Change antenna and obtain larger 3dB axles than beam angle, be of a smaller size, suitable for miniaturized system.
To achieve the above object, the embodiment of the present application provides a kind of circular polarized antenna, including feed section and radiant body；Its
In,
The radiant body includes：
First medium plate, the positive and negative of the first medium plate are symmetrically covered with N to arc metal plate, wherein, N >=4 and for 4
Integral multiple；
3rd dielectric-slab, the positive and negative of the 3rd dielectric-slab are symmetrically covered with M to arc metal plate, and M=N, the M is to arc
Shape sheet metal and the N are to arc metal plate position correspondence and oppositely oriented；
Second medium plate, one end of multiple second medium plates is connected with the N to the end of arc metal plate respectively,
The other end with M connections corresponding to the end of arc metal plate, forming the stereo spiral ring of closing respectively；
The feed section includes：
4th dielectric-slab；
Input port, it is located on the 4th dielectric-slab；The input port receives input signal, by the input signal
Send to work(and divide phase shifter；
Work(divides phase shifter, is connected with the input port；The work(divides phase shifter to receive the input signal, will be described defeated
Enter signal and be divided into N number of or N/2 output signal, described N number of or N/2 output signal is transmitted to N by microstrip line respectively
Individual or N/2 metal patch；Wherein, described N number of or N/2 output signal constant amplitude and phase differs 90 ° successively；
Metal patch, phase shifter is divided to be connected with the work(；The metal patch receives the work(and divides the output of phase shifter to believe
Number, the output signal is subjected to couple feed using air as medium to the radiant body；
Wherein, the first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab set gradually and interfixed from top to bottom,
There is gap between 4th dielectric-slab and the 3rd dielectric-slab.
Further, the first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab are parallel to each other, the first medium
Plate, the 3rd dielectric-slab and the 4th dielectric-slab are perpendicular with the second medium plate.
Further, the first medium plate, second medium plate and the 3rd dielectric-slab are epoxy glass fabric medium.
Further, the second medium plate is welded to connect with the arc metal plate.
Further, the both ends of each arc metal plate are provided with some circular holes.
Further, the center of the 3rd dielectric-slab is provided with through hole.
Further, the 3rd dielectric-slab is provided with a breach close to the one side of the 4th dielectric-slab.
Further, the 4th dielectric-slab is polytetrafluoroethylglass glass cloth medium.
Further, the metal patch is shaped as circle.
Further, the work(divides the earth terminal of phase shifter to connect with the metal ground plate of the 4th medium back.
Said one or multiple technical schemes in the embodiment of the present application, at least there is following one or more technology effects
Fruit：
1st, by providing a kind of circular polarized antenna, the dielectric-slab that metal is covered using multilayer is vertically connected with the embodiment of the present application,
An end to end closing stereo spiral ring structure successively is formed, because it is arc shape and is sandwich construction, is cut in limited
Current path is increased in face, so as to reach broad beam and reduce the effect of size；The feeding network of bottom uses metal patch
Couple feed using air as medium is carried out to helical ring, reduces influence of the feedback net to radiation, axle is more preferable than performance.Therefore,
The circular polarized antenna obtains larger 3dB axles than beam angle, is of a smaller size, suitable for miniaturized system.
2nd, the circular polarized antenna of the embodiment of the present application, its operating center frequency are 1.575GHz, half power lobe width
123 °, for 3dB axles than 155 ° of beam angle average out to, size is 34mm × 34mm × 10.1mm.
Brief description of the drawings
Fig. 1 is a kind of three-dimensional model subdivision graph for circular polarized antenna that the embodiment of the present application provides；
Fig. 2 is a kind of radiating surface illustraton of model for circular polarized antenna that the embodiment of the present application provides；
Fig. 3 is a kind of side view for circular polarized antenna that the embodiment of the present application provides；
Fig. 4 is the structural representation for the first medium plate that the embodiment of the present application provides；
Fig. 5 is the structural representation for the second medium plate that the embodiment of the present application provides；
Fig. 6 is the structural representation for the 3rd dielectric-slab that the embodiment of the present application provides；
Fig. 7 is the structural representation for the dielectric-slab of feeding network the 4th that the embodiment of the present application provides；
Fig. 8 is the s parameters simulation result figures for the circular polarized antenna that the embodiment of the present application provides, and wherein abscissa is frequency,
Ordinate is amplitude response；
Fig. 9 be the axle for the circular polarized antenna that the embodiment of the present application provides than simulation result figure, wherein abscissa be frequency, vertical
Coordinate is axle ratio；
Figure 10 is the gain simulation result figure for the circular polarized antenna that the embodiment of the present application provides, and wherein abscissa is frequency,
Ordinate is main polarized gain value；
Figure 11 is that the circular polarized antenna that the embodiment of the present application provides existsFace beam angle simulation result figure, wherein horizontal
Coordinate is angle, θ, and ordinate is main polarized gain value；
Figure 12 is the axle for the circular polarized antenna that the embodiment of the present application provides than beam angle simulation result figure, wherein abscissa
To be axle ratio for angle, θ, ordinate；
Figure 13 is that the circular polarized antenna that the embodiment of the present application provides emulates two-dimensional directional figure, wherein solid line in center frequency points
To be main polarization, dotted line is cross polarization.
In figure：1- first medium plates, the arc metal plates of 11- first, the arc metal plates of 12- second, the curved metals of 13- the 3rd
Piece, the arc metal plates of 14- the 4th, 2- second medium plates, the dielectric-slabs of 3- the 3rd, the arc metal plates of 31- the 5th, the arcs of 32- the 6th
Sheet metal, the arc metal plates of 33- the 7th, the arc metal plates of 34- the 8th, 35- breach, 36- through holes, the dielectric-slabs of 4- the 4th, 5- work(
Point phase shifter, 6- input ports, 7- microstrip lines, 8- metal patches, the metal patches of 81- first, the metal patches of 82- second, 83- the
Three metal patches, the metal patches of 84- the 4th, 9- connecting holes, 10- fixing holes.
Embodiment
The embodiment of the present application provides a kind of circular polarized antenna, and it is wider than wave beam that the circular polarized antenna obtains larger 3dB axles
Degree, is of a smaller size, suitable for miniaturized system.
To achieve the above object, general thought is as follows for the technical scheme of the embodiment of the present application：
The embodiment of the present application provides a kind of circular polarized antenna, including feed section and radiant body；Wherein,
The radiant body includes：
First medium plate, the positive and negative of the first medium plate are symmetrically covered with N to arc metal plate, wherein, N >=4 and for 4
Integral multiple；
3rd dielectric-slab, the positive and negative of the 3rd dielectric-slab are symmetrically covered with M to arc metal plate, and M=N, the M is to arc
Shape sheet metal and the N are to arc metal plate position correspondence and oppositely oriented；
Second medium plate, one end of multiple second medium plates is connected with the N to the end of arc metal plate respectively,
The other end with M connections corresponding to the end of arc metal plate, forming the stereo spiral ring of closing respectively；
The feed section includes：
4th dielectric-slab；
Input port, it is located on the 4th dielectric-slab；The input port receives input signal, by the input signal
Send to work(and divide phase shifter；
Work(divides phase shifter, is connected with the input port；The work(divides phase shifter to receive the input signal, will be described defeated
Enter signal and be divided into N number of or N/2 output signal, described N number of or N/2 output signal is transmitted to N by microstrip line respectively
Individual or N/2 metal patch；Wherein, described N number of or N/2 output signal constant amplitude and phase differs 90 ° successively；
Metal patch, phase shifter is divided to be connected with the work(；The metal patch receives the work(and divides the output of phase shifter to believe
Number, the output signal is subjected to couple feed using air as medium to the radiant body；
Wherein, the first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab set gradually and interfixed from top to bottom,
There is gap between 4th dielectric-slab and the 3rd dielectric-slab.
Above-mentioned technical proposal, the dielectric-slab that metal is covered by using multilayer are vertically connected with, and formation one is end to end successively
Closing stereo spiral ring structure, because it is arc shape and is sandwich construction, current path is increased in limited section, from
And reach broad beam and reduce the effect of size；Metal patch is used to carry out the couple feed using air as medium to helical ring,
Influence of the feedback net to radiation is reduced, axle is more preferable than performance.Therefore, the circular polarized antenna obtains larger 3dB axles and compares wave beam
Width, it is of a smaller size, suitable for miniaturized system.
Technical solution of the present invention is described in detail below by accompanying drawing and specific embodiment, it should be understood that the application
Specific features in embodiment and embodiment are the detailed description to technical scheme, rather than to present techniques
The restriction of scheme, in the case where not conflicting, the technical characteristic in the embodiment of the present application and embodiment can be mutually combined.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, expression may have three kinds of passes
System, for example, A and/or B, can be represented：Individualism A, while A and B be present, these three situations of individualism B.In addition, herein
Middle character "/", it is a kind of relation of "or" to typically represent forward-backward correlation object.
The embodiment of the present application provides a kind of circular polarized antenna, as Figure 1-3, including feed section and radiant body；Wherein,
The radiant body includes：
First medium plate 1, the positive and negative of the first medium plate 1 are symmetrically covered with N to arc metal plate, wherein, N >=4 and
For 4 integral multiple；
3rd dielectric-slab 3, the positive and negative of the 3rd dielectric-slab 3 are symmetrically covered with M to arc metal plate, M=N, described M pairs
Arc metal plate and the N are to arc metal plate position correspondence and oppositely oriented；
Second medium plate 2, multiple described one end of second medium plate 2 are connected with the N to the end of arc metal plate respectively,
The other end with M connections corresponding to the end of arc metal plate, forms the stereo spiral ring of closing respectively；
The feed section includes：
4th dielectric-slab 4；
Input port 6, it is located on the 4th dielectric-slab 4；The input port 6 receives input signal, by the input
Signal, which is sent to work(, divides phase shifter 5；
Work(divides phase shifter 5, is connected with the input port 6；The work(divides phase shifter 5 to receive the input signal, by institute
State input signal and be divided into N number of or N/2 output signal, described N number of or N/2 output signal is passed by microstrip line 7 respectively
Transport to N number of or N/2 metal patch 8；Wherein, described N number of or N/2 output signal constant amplitude and phase differs 90 ° successively；
Metal patch 8, phase shifter 5 is divided to be connected with the work(；The metal patch 8 receives the work(and divides the defeated of phase shifter 5
Go out signal, the output signal is subjected to couple feed to the radiant body using air as medium, forms feeding network；
Wherein, the first medium plate 1, the 3rd dielectric-slab 3 and the 4th dielectric-slab 4 are set gradually and mutually solid from top to bottom
It is fixed, there is gap between the 4th dielectric-slab 4 and the 3rd dielectric-slab 3.
In the present embodiment, the radiant body is by first medium plate 1, the 3 three layers of dielectric-slab of dielectric-slab of second medium plate 2 and the 3rd
Composition.Specifically, as shown in figure 4, the two sides of the first medium plate 1 symmetrically 4 pairs of arc metal plates of etching (11,12,13,
14), i.e. N=4, i.e.,：Tow sides respectively etching 4, and position is relative, 2 of positive and negative relative position are a pair.Certainly, N
Value be not limited to 4, can also be other 4 integral multiple, such as：8th, 12 etc..Preferably, the size of first medium plate 1 is
34mm×34mm；
" arc " refers to there is certain length and width by what at least two camber lines (interior camber line, outer camber line) surrounded
Closed figure, the interior camber line are proximate to the camber line of curvature side, and the outer camber line is the arc away from curvature side
Line.Using arc metal plate, there is grading structure, energy bound current improves gain.
As shown in figure 5, the second medium plate 2 is the dielectric posts of two sides all standing metal, rise on connection first medium plate 1
The effect of arc metal plate on arc metal plate and the 3rd dielectric-slab 3, it is shaped as the corner of cuboid and respectively cuts out a small length
The shape obtained after cube/square.Preferably, its jag height a=1mm, jag width b=3mm, intermediate ends width
C=5.26mm, height L=4.6mm.
As shown in fig. 6, the two sides of the 3rd dielectric-slab 3 also symmetrically etches 4 pairs of arc metal plates (31,32,33,34),
That is M=4, the arc metal plate and the arc metal plate of relative position on first medium plate 1 on the 3rd dielectric-slab 3 are oppositely oriented.
The size of 3rd dielectric-slab 3 is identical with the size of first medium plate 1, is also 34mm × 34mm." relative position " refers to phase
Corresponding position, the i.e. upper left corner to the upper left corner, the upper right corner to the upper right corner, by that analogy.
As shown in Fig. 2 by 8 second medium plates 2 by the 4 pairs of arc metal plates and second medium on first medium plate 1
4 pairs of arc metal plates on plate 2 correspondingly connect as one, and form the stereo spiral ring of closing.Specifically, each curved metal
Piece has close to the one end at dielectric-slab center and one end away from dielectric-slab center, and the both ends of each pair arc metal plate respectively connect
One second medium plate 2." the corresponding connection " refers to the end phase of two layers of arc metal plate up and down in relative position
Connection.As shown in Fig. 2 upper and lower two layers of arc metal plate is oppositely arranged and oppositely oriented, the vertical of closing is sequentially connected from head to tail to form
Body helical ring.Wherein, the outer end of the first arc metal plate 11 be connected with the outer end of the 5th arc metal plate 31, the first curved metal
The inner of piece 11 is connected with the inner of the 8th arc metal plate 34；The outer end of second arc metal plate 12 and the 6th arc metal plate
32 outer end is connected, the inner of the second arc metal plate 12 is connected with the inner of the 5th arc metal plate 31；3rd arc
The outer end of sheet metal 13 is connected with the outer end of the 7th arc metal plate 33, the inner of the 3rd arc metal plate 13 and the 6th arc are golden
The inner of category piece 32 is connected；The outer end of 4th arc metal plate 14 is connected with the outer end of the 8th arc metal plate 34, the 4th
The inner of arc metal plate 14 is connected with the inner of the 7th arc metal plate 33.Here " outer end " refers to away from dielectric-slab center
One end, " the inner " refers to one end close to dielectric-slab center.
In the present embodiment, the helical structure size of circular polarized antenna meets following formula：
N (S+L)=λ/2
Wherein N is the revolution of helical structure, i.e., the logarithm of arc metal plate on first medium plate 1；S is in arc metal plate
Arc length；L is the height of second medium plate 2；λ is the wavelength in space.
Further, three-dimensional helical ring structure is optimized, obtains S=26mm, L=5mm, there is the effect for improving gain
Fruit.
Feeding network is located at the 4th dielectric-slab 4, and the one side of the 4th dielectric-slab 4 away from the 3rd dielectric-slab 3 is covered metal and connect
Floor, close to the 3rd dielectric-slab 3 as shown in fig. 7, the 4th dielectric-slab 4 while be provided with input port 6, center fills
There is one point of four work(to divide phase shifter, corner to be covered with metal patch (81,82,83,84).The input port 6 welds SMA interfaces, institute
State input port 6 and receive input signal, the input signal is sent to one point of four work(and divides phase shifter；One point of four work(divides phase shifter
The input signal is received, the input signal is subjected to the quartering, makes one point of four work(divide the output of four ports of phase shifter to believe
Number there is constant amplitude phase and differ 90 ° of characteristic successively；The output signal is transmitted to 4 by one section of matching microstrip line 7 respectively
Individual metal patch (81,82,83,84), signal constant amplitude and phase on 4 metal patches (81,82,83,84) differ successively
90°.Found through emulation, fed using coupled patch and directly presented compared to probe, antenna gain is higher, and axle is more preferable than performance.This reality
Apply in example using four feedbacks, similarly, good circular polarization radiation performance can be also obtained using double-fed.By the phase difference for changing feed
Order and the rotation direction of arc metal plate can switch in left-handed and right-handed circular polarization, and the present embodiment is right-handed circular polarization.
Fixing hole is set in identical position correspondence on the first medium plate 1, the 3rd dielectric-slab 3 and the 4th dielectric-slab 4
10, it is fixed by nylon stud.The fixing hole 10 is cylindrical hole.
In the present embodiment, the first medium plate 1, the 3rd dielectric-slab 3 and the 4th dielectric-slab 4 are parallel to each other, and described first
Dielectric-slab 1, the 3rd dielectric-slab 3 and the 4th dielectric-slab 4 are perpendicular with the second medium plate 2.The first medium plate 1,
Three dielectric-slabs 3 are identical with the shape and size of the 4th dielectric-slab 4, and three is centrally located on same vertical line.
Further, the first medium plate 1, the dielectric-slab 3 of second medium plate 2 and the 3rd are epoxy glass fabric medium.
Preferably, first medium plate 1, second medium plate 2, the 3rd dielectric-slab 3 are 4.4 using dielectric constant, and loss angle tangent is
0.02 epoxy glass fabric medium, thickness are 1mm.
Further, the second medium plate 2 is welded to connect with the arc metal plate.Specifically, in each pair arc
The both ends of sheet metal respectively set a connecting hole 9, and the connecting hole 9 is rectangular to be adapted with the end shape of second medium plate 2
Shape through hole.One end of second medium plate 2 is embedded on first medium plate 1 in the connecting hole of arc metal plate end, other end insertion
On 3rd dielectric-slab 3 in the connecting hole of corresponding arc metal plate end, in second medium plate 2 and first medium plate 1, the 3rd medium
The junction of plate 3 sets solder joint, precision welding, so as to which two layers of arc metal plate on the dielectric-slab 3 of first medium plate 1 and the 3rd be connected
It is connected in the stereo spiral ring of integrally formed closing.
Further, the both ends of each arc metal plate are provided with some circular holes.Specifically, in every curved metal
Each manhole for making a call to 4 a diameter of 0.5mm in piece both ends to connect the two panels arc metal plate up and down in each pair arc metal plate,
To increase antenna gain.The circular hole is distributed in the surrounding of the connecting hole 9.
Further, the center of the 3rd dielectric-slab 3 is provided with through hole 36.Because being felt at ease in the 4th dielectric-slab 4 below
Divide phase shifter 5 equipped with work(, so a through hole is dug at the center of the 3rd dielectric-slab 3, so as to the integrated design of antenna.Preferably,
The through hole 36 is the square through-hole that the length of side is 9mm.
Further, the 3rd dielectric-slab 3 is set close to the one side of the 4th dielectric-slab 4 with input port 6 with respect to place
There is a breach 35, to prevent influenceing the welding of SMA interfaces at the input port 6 of lower section.The breach 35 is length of side 4mm square.
Further, the 4th dielectric-slab 4 is polytetrafluoroethylglass glass cloth medium, thickness 1.5mm, dielectric constant
2.2, loss angle tangent 0.003.
Further, the metal patch 8 is shaped as circle.The present embodiment uses circular metal of the radius for 2.9mm
Paster carries out couple feed to radiant body by medium of air, reduces influence of the feedback net to radiation, and present net and spiral ring cutting
Face size is consistent.Air dielectric thickness is 2mm, i.e. gap between the 4th dielectric-slab 4 and the 3rd dielectric-slab 3 is 2mm.
Further, the work(divides the earth terminal of phase shifter 5 to connect with the metal ground plate at the back side of the 4th dielectric-slab 4.Tool
For body, by GND ground structures, connected using the through hole for covering metal with back metal earth plate.
The stereo spiral ring structure of the embodiment of the present application design constitutes Huygens source, and Antenna Operation centre frequency is
1.575GHz, it is maximum in centre frequency dot gains, be 3.5dBi, HPBW is 123 °, 3dB axles than beam angle reach 140 °-
170 °, size is only 34 × 34 × 10.1mm3, broad beam performance and miniaturization are realized well.It can be formed by adjusting
The length of the arc metal plate of helical ring changes antenna resonant frequency to adapt to different application, using common used material medium, adds
Work cost is low.
The embodiment of the present application, which is described in detail below, has the design principle of broad beam performance circular polarized antenna.
The application is from basic Huygens source theory, the fundamental radiation characteristic based on short dipole, enters line width ripple
Beam circular Antenna Design.Theoretical from antenna foundation, the electric-field intensity for the point that distance is r is in dipole far field：
Wherein：A=-k2C, wherein k are wave number, and c is the light velocity, and σ is wave impedance, e-jkrFor time factor, peAnd PmTable respectively
Show the electric dipole moment and dipole moment of short dipole.Assuming that dipole is put along Z axis, then the sphere expression formula of electric field is：
Wherein：B=A σ pe,For the unit vector of spherical coordinates, and
As can be seen from the above equation, short dipole is identical in the polarised direction of space all directions, and only by αpValue control,
Therefore, α is takenpCircular polarisation can be obtained during=± j.
In order to obtain broad beam performance, according to circular polarized antenna radiation characteristic, you can know requirement antenna in greatest irradiation side
It is quasi- omnidirectional radiation to be needed to end, then needs radiation extremely weak in opposite direction, this can be realized by combining a pair of short dipoles.It is false
If it is respectively the first dipole and the second dipole to have a pair of short dipoles in space, the first dipole is put along X-axis, and second is even
Extremely son is put along Y-axis, and orthogonal feed is carried out to the first dipole and the second dipole.Define the α of the first dipolep=j；
Then the first dipole is in the electric field expression formula of Z axis：
Second dipole is in the electric field expression formula of Z axis：
It can clearly be seen that the electric field of the first dipole and the second dipole is cancelled out each other in+Z axis superposition ,-Z axis, so as to
Obtain the +Z direction i.e. half space radiation of upper half-space.Because making α in above-mentioned derivationp=+j, and we can pass through in practice
Change dipole put and current feed phase changes the relativeness between the first dipole and the second dipole, so as to
Control the left and right rotation direction of aerial radiation.According to the radiation characteristic of crossed dipoles, with reference to helical antenna knowledge, the application is to radiation
Face structure is designed, and uses the form of spiral to reduce antenna size, on the premise of broad beam performance and small size is ensured
Helical structure is optimized, devises helical structure as shown in Figure 2.
As shown in Fig. 2 it has upper and lower two layers oppositely oriented arc metal plate, upper and lower two layers of arc metal plate both ends are by square
The metal second medium plate 2 that covers of shape is connected, and the stereo spiral ring of a closing is formed, because it is arc shape and is multilayer knot
Structure, current path is increased in limited section, reached the effect for reducing size.The embodiment of the present application is stood with Planar realization
The mode of body is dielectric-slab planographic helicoid form, by some dielectric-slabs for covering metal mutually it is embedding and welding, realize in Fig. 2
The engineering design of helical structure, reduce cost of manufacture and antenna weights.
The circular polarized antenna model established in HFSS15.0 electromagnetic simulation softwares in the embodiment of the present application is emulated, by
Fig. 8-13 simulation result understands that the Antenna Operation centre frequency is 1.575GHZ, and its return loss reaches-37dB, return loss
Frequency range less than -10dB is 1.26GHz-1.82GHz, and standing wave bandwidth is very wide, because feeding network is broadband.My god
Bobbin is 1.37GHz-2.25GHZ than the frequency range less than 3dB, and frequency range of the gain more than 0dBi is 1.55GHz-
1.61GHz, reach maximum in 1.575GHz, be 3.5dBi.Half power lobe width reaches 123 °, and 3dB axles compare beam angle
WithRespectively 140 ° and 170 °.Data above shows that the circular polarized antenna of the embodiment of the present application is simultaneously good
Good broad beam and miniaturization performance.
A kind of antenna provided in the embodiment of the present application, at least has the following technical effect that：
1st, by providing a kind of circular polarized antenna, the dielectric-slab that metal is covered using multilayer is vertically connected with the embodiment of the present application,
An end to end closing stereo spiral ring structure successively is formed, because it is arc shape and is sandwich construction, is cut in limited
Current path is increased in face, so as to reach broad beam and reduce the effect of size；The feeding network of bottom uses metal patch
Couple feed using air as medium is carried out to helical ring, reduces influence of the feedback net to radiation, axle is more preferable than performance.Therefore,
The circular polarized antenna obtains larger 3dB axles than beam angle, is of a smaller size, suitable for miniaturized system.
2nd, the circular polarized antenna of the embodiment of the present application, its operating center frequency are 1.575GHz, half power lobe width
123 °, for 3dB axles than 155 ° of beam angle average out to, size is 34mm × 34mm × 10.1mm.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of circular polarized antenna, it is characterised in that including feed section and radiant body；Wherein,
The radiant body includes：
First medium plate, the positive and negative of the first medium plate are symmetrically covered with N to arc metal plate, wherein, N >=4 and for 4 it is whole
Several times；
3rd dielectric-slab, the positive and negative of the 3rd dielectric-slab are symmetrically covered with M to arc metal plate, and M=N, the M are to arc gold
Belong to piece and the N to arc metal plate position correspondence and oppositely oriented；
Second medium plate, one end of multiple second medium plates are connected to the end of arc metal plate with the N, are another respectively
End with respectively with the M is corresponding to the end of arc metal plate connects, form the stereo spiral ring of closing；
The feed section includes：
4th dielectric-slab；
Input port, it is located on the 4th dielectric-slab；The input port receives input signal, and the input signal is sent
Divide phase shifter to work(；
Work(divides phase shifter, is connected with the input port；The work(divides phase shifter to receive the input signal, and the input is believed
Number be divided into N number of or N/2 output signal, described N number of or N/2 output signal is transmitted to N number of by microstrip line respectively or
N/2 metal patch；Wherein, described N number of or N/2 output signal constant amplitude and phase differs 90 ° successively；
Metal patch, phase shifter is divided to be connected with the work(；The metal patch receives the output signal that the work(divides phase shifter, will
The output signal carries out couple feed using air as medium to the radiant body；
Wherein, the first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab set gradually and interfixed from top to bottom, described
There is gap between 4th dielectric-slab and the 3rd dielectric-slab.
2. circular polarized antenna as claimed in claim 1, it is characterised in that the first medium plate, the 3rd dielectric-slab and the 4th
Dielectric-slab is parallel to each other, and the first medium plate, the 3rd dielectric-slab and the 4th dielectric-slab are perpendicular with the second medium plate.
3. circular polarized antenna as claimed in claim 1 or 2, it is characterised in that the first medium plate, second medium plate and
Three dielectric-slabs are epoxy glass fabric medium.
4. circular polarized antenna as claimed in claim 1, it is characterised in that the second medium plate welds with the arc metal plate
Connect in succession.
5. circular polarized antenna as claimed in claim 1, it is characterised in that the both ends of each arc metal plate are provided with some
Circular hole.
6. circular polarized antenna as claimed in claim 1, it is characterised in that the center of the 3rd dielectric-slab is provided with through hole.
7. the circular polarized antenna as described in claim 1 or 6, it is characterised in that the 3rd dielectric-slab is close to the 4th dielectric-slab
One side be provided with a breach.
8. circular polarized antenna as claimed in claim 1 or 2, it is characterised in that the 4th dielectric-slab is polytetrafluoroethylene (PTFE) glass
Glass cloth medium.
9. circular polarized antenna as claimed in claim 1, it is characterised in that the metal patch is shaped as circle.
10. circular polarized antenna as claimed in claim 1, it is characterised in that the work(divides the earth terminal of phase shifter and described the
The metal ground plate of four medium backs connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664155.9A CN107611599B (en) | 2017-08-01 | 2017-08-01 | Circularly polarized antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664155.9A CN107611599B (en) | 2017-08-01 | 2017-08-01 | Circularly polarized antenna |
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| CN107611599B CN107611599B (en) | 2020-03-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI674706B (en) * | 2018-12-20 | 2019-10-11 | 和碩聯合科技股份有限公司 | Dual-band circularly polarized antenna structure |
| CN115441174A (en) * | 2022-09-02 | 2022-12-06 | 安徽大学 | Dual-frequency low-profile wide-beam circularly polarized antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882667A (en) * | 2015-04-27 | 2015-09-02 | 北京理工大学 | Multilayer quadrifilar helix antenna system |
-
2017
- 2017-08-01 CN CN201710664155.9A patent/CN107611599B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882667A (en) * | 2015-04-27 | 2015-09-02 | 北京理工大学 | Multilayer quadrifilar helix antenna system |
Non-Patent Citations (1)
| Title |
|---|
| MOHAMMAD SAEID GHAFFARIAN等: "Wide-band Circularly Polarized Slot Antenna by", 《2017 11TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI674706B (en) * | 2018-12-20 | 2019-10-11 | 和碩聯合科技股份有限公司 | Dual-band circularly polarized antenna structure |
| CN111355025A (en) * | 2018-12-20 | 2020-06-30 | 和硕联合科技股份有限公司 | Dual-frequency circularly polarized antenna structure |
| CN115441174A (en) * | 2022-09-02 | 2022-12-06 | 安徽大学 | Dual-frequency low-profile wide-beam circularly polarized antenna |
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| Publication number | Publication date |
|---|---|
| CN107611599B (en) | 2020-03-31 |
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