CN208889854U - A kind of dual-circular-polarifeedon feedon source antenna - Google Patents
A kind of dual-circular-polarifeedon feedon source antenna Download PDFInfo
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Abstract
The utility model embodiment provides a kind of dual-circular-polarifeedon feedon source antenna, comprising: rectangular waveguide transformation segment, circular polarizer, square-circle transition waceguide and the Feed Horn successively to connect；The Feed Horn is light wall loudspeaker；The Feed Horn includes the first cavity, the second cavity and third cavity；First cavity is circular cylindrical cavity, and one end of first cavity connects with the square-circle transition waceguide, and the other end of first cavity connects with second cavity；Second cavity is the flared cavity body with default profile, and the small-caliber end of second cavity connects with first cavity, and the large diameter end of second cavity connects with the third cavity；The third cavity is the rotary table cavity with default subtended angle, and the top of the third cavity connects with second cavity, and the bottom end of the third cavity is the large diameter end of the smooth wall loudspeaker.The isolation of feed antenna can be improved in the utility model embodiment, and reduces the secondary lobe of feed antenna.
Description
Technical field
The utility model relates to feed antenna technical fields, more particularly to a kind of dual-circular-polarifeedon feedon source antenna.
Background technique
With the maturation of 4G mobile communication technology and the continuous development of mobile communication system, low-frequency range frequency spectrum resource is extremely tight
It lacks, while the explosive growth of wireless traffic brings the great demand to ultrahigh speed wireless transmission rate again.In millimeter wave and too
Hertz frequency range, still has a large amount of idle frequency spectrum resource at present, these frequency spectrum resources to provide tens of Gigabits, or even on
The wireless communication rate of hundred gigabits is possibly realized.
However, free space path loss and atmospheric attenuation greatly increase for millimeter wave and Terahertz frequency range, in order to gram
Take these losses, it is necessary to use the antenna of high-gain.Widely applied reflector antenna is set because it is mature in satellite communication
Meter method and high-gain broadband characteristic become the preferable selection of high-gain aerial in millimeter wave and Terahertz communication.It is using
It is a kind of effective technology using polarization multiplexing for improve data transfer rate while high-gain aerial, utilizes
Data are divided into two-way by the orthogonal property of different polarized waves, are launched by two kinds of orthogonal polarized waves, so that two paths of data
It is transmitted in same frequency domain and time-domain parallel, substantially increases message transmission rate while not increasing using frequency spectrum.And due to
Circularly polarised wave has anti-multipath, without the advantage of transmitting terminal receiving end alignment, therefore, using orthogonal left-handed and right-handed circular polarization
The mode that wave carries out polarization multiplexing is also applied in wireless communication.
Currently, generalling use dual-circular-polarifeedon feedon source antenna, the height of orthogonal circular polarizations multiplexing is realized with a reflecting surface is unified
Gain antenna.Wherein, dual-circular-polarifeedon feedon source antenna generallys use square horn or circular aperture baud loudspeaker to emit circularly polarised wave.
But square horn and circular aperture baud loudspeaker are not easily accomplished lower return loss, will affect the isolation of feed antenna
Degree.Moreover, the secondary lobe that square horn also will cause feed antenna is higher.
Utility model content
The utility model embodiment is designed to provide a kind of dual-circular-polarifeedon feedon source antenna, with improve feed antenna every
From degree, and reduce the secondary lobe of feed antenna.Specific technical solution is as follows:
The utility model embodiment provides a kind of dual-circular-polarifeedon feedon source antenna, comprising: the rectangular waveguide successively to connect turns
Change section, circular polarizer, square-circle transition waceguide and Feed Horn；The Feed Horn is light wall loudspeaker；
The Feed Horn includes the first cavity, the second cavity and third cavity；
First cavity is circular cylindrical cavity, and one end of first cavity connects with the square-circle transition waceguide, institute
The other end for stating the first cavity connects with second cavity；
Second cavity is the flared cavity body with default profile, the small-caliber end of second cavity and described the
One cavity connects, and the large diameter end of second cavity connects with the third cavity；
The third cavity is the rotary table cavity with default subtended angle, the top of the third cavity and second cavity
Connect, the bottom end of the third cavity is the large diameter end of the smooth wall loudspeaker.
Optionally, the profile of the flared cavity body with default profile meets the following conditions:
Y=sin2.5(x)
Wherein, x is the distance of the default origin O on point X to the axis of second cavity, and the point X is described second
Any point on the axis of cavity, y are in second cavity, comprising the point X and vertical with the axis of second cavity
Section radius.
Optionally, the square-circle transition waceguide is three section octagon squares-circle transition waceguide.
Optionally, the three sections octagon square-circle transition waceguide includes:
The first square-circle transition waceguide, the second square-circle transition waceguide and the third square-circle transition waceguide successively to connect, it is described
The cavity of first square-circle transition waceguide and the second square-circle transition waceguide is octagon right prism cavity, the third square-
The cavity of circle transition waceguide is positive eight deformation right prism cavitys；
First square-circle the transition waceguide also connects with the circular polarizer, the third square-circle transition waceguide also with institute
The first cavity is stated to connect.
Optionally, the central point in the section of the cavity of the third square-circle transition waceguide, to the vertical line of the section any side
Length are as follows: more than or equal to the radius in the section of first cavity.
Optionally, the port of one end that the circular polarizer connects with the first square-circle transition waceguide is square, institute
State the port of one end that the first square-circle transition waceguide cavity connects with the circular polarizer are as follows: by four of the square
The octagon formed after the removal of angle.
Optionally, one end with a port of the circular polarizer connects with the square-circle transition waceguide, the circle
There are two one end of port to connect with the rectangular waveguide transformation segment for the tool of polarizer.
Optionally, the rectangular waveguide transformation segment includes: the 4th cavity and the 5th cavity；
The port of one end of the port and the 5th cavity of one end of the 4th cavity is arranged in antenna body
Portion, for connecting with the circular polarizer；
The port of the other end of 4th cavity is located on antenna body, is vertical with the large diameter end of the Feed Horn
The first plane on, the port of the other end of the 5th cavity is located on antenna body, the heavy caliber with the Feed Horn
In the second vertical plane of end；Wherein, first plane is parallel with second plane.
Optionally, the line of first nodal point and the second central point is vertical with the axis of the antenna, first center
Point is the central point of the port of the other end of the 4th cavity, and second central point is the other end of the 5th cavity
The central point of port.
Optionally, the port of the other end of the port and the 5th cavity of the other end of the 4th cavity is standard
The port rectangular waveguide WR-10.
Scheme provided by the embodiment of the utility model uses the cylinder including being sequentially connected in dual-circular-polarifeedon feedon source antenna
The light wall loudspeaker of shape cavity, flared cavity body and rotary table cavity, it is, the profile of the light wall loudspeaker is by several different angles
Broken line composition, can provide more freedom degrees in structure in this way to adjust the overall performance of dual-circular-polarifeedon feedon source antenna, make
Dual-circular-polarifeedon feedon source antenna lower return loss easy to accomplish is obtained, the isolation of dual-circular-polarifeedon feedon source antenna can be improved.And
And the light wall loudspeaker use circular aperture, so that the secondary lobe of dual-circular-polarifeedon feedon source antenna is lower.
Certainly, any product or method for implementing the utility model must be not necessarily required to reach all the above simultaneously
Advantage.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described.
Fig. 1 is a kind of structural schematic diagram of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of Feed Horn in embodiment illustrated in fig. 1；
Fig. 3 a is square-circle transition waceguide structural schematic diagram in embodiment illustrated in fig. 1；
Fig. 3 b is three section octagon squares-circle transition waceguide schematic cross-section in Fig. 3 a illustrated embodiment；
Fig. 4 is the structural schematic diagram of circular polarizer in embodiment illustrated in fig. 1；
Fig. 5 is the structural schematic diagram of rectangular waveguide transformation segment in embodiment illustrated in fig. 1；
Fig. 6 is a kind of return loss of the dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model in working frequency range
Variation schematic diagram, and the axis of left-hand circular polarization wave and right-handed circular polarization wave emitted is than variation schematic diagram；
Fig. 7 is by a kind of left-hand circular polarization wave that dual-circular-polarifeedon feedon source antenna emits provided by the embodiment of the utility model
Main polarization directional diagram and Cross polarization pattern；
Fig. 8 is by a kind of right-handed circular polarization wave that dual-circular-polarifeedon feedon source antenna emits provided by the embodiment of the utility model
Main polarization directional diagram and Cross polarization pattern.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In order to solve problems in the prior art, the utility model embodiment provides a kind of dual-circular-polarifeedon feedon source antenna.
Referring to Fig. 1, a kind of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model, comprising: the square successively to connect
Shape waveguide transitions section 1, circular polarizer 2, square-circle transition waceguide 3 and Feed Horn 4；Wherein, Feed Horn 4 is light wall loudspeaker；
Feed Horn 4 includes the first cavity 41, the second cavity 42 and third cavity 43 (referring to fig. 2)；
First cavity 41 is circular cylindrical cavity, and one end of the first cavity 41 connects with square-circle transition waceguide 3, the first cavity
41 other end connects with the second cavity 42；
Second cavity 42 is the flared cavity body with default profile, the small-caliber end of the second cavity 42 and the first cavity 41
Connect, the large diameter end of the second cavity 42 connects with third cavity 43；
Third cavity 43 is the rotary table cavity with default subtended angle, and the top of third cavity 43 connects with the second cavity 42,
The bottom end of third cavity 43 is the large diameter end of light wall loudspeaker.
It will be appreciated by persons skilled in the art that continuously being offered inside the antenna body of dual-circular-polarifeedon feedon source antenna more
A cavity, rectangular waveguide transformation segment 1, circular polarizer 2, square-circle transition waceguide 3 and the feed that multiple cavity as successively connects
Loudspeaker 4, the cavity wall and antenna body of rectangular waveguide transformation segment 1, circular polarizer 2, square-circle transition waceguide 3 and Feed Horn 4
Belong to solid construction between each side wall.Specifically, as shown in Figure 1, above-mentioned dual-circular-polarifeedon feedon source antenna can be with hollow
The cuboid in region, the hollow area are by rectangular waveguide transformation segment 1, circular polarizer 2, square-circle transition waceguide 3 and Feed Horn
The hollow area of connection is formed by after 4 respective cavity connections.It should be noted that in a particular application, double-circle polarization feedback
The material of source antenna can be that copper is gold-plated or aluminium is gold-plated.Specifically, can contacting with air in dual-circular-polarifeedon feedon source antenna
Each outer surface and inner surface are gold-plated.Certainly, according to actual needs, the material of dual-circular-polarifeedon feedon source antenna is also possible to other
The material of type, the utility model embodiment do not limit this.
It is third cavity 43, second circle to third from first circle of left-hand digit to second circle in Fig. 2
Circle is the second cavity 42, and round to the 4th circle of third is the first cavity 41.It include the first cavity 41, the second cavity
42 and third cavity 43 light wall loudspeaker have specific profile.
Optionally, there is the profile of the flared cavity body of default profile to meet the following conditions:
Y=sin2.5(x)
Wherein, x is the distance of the default origin O on point X to the axis of the second cavity 42, and point X is the axis of the second cavity 42
Any point on line, y are in the second cavity 42, comprising point X and the radius in the section vertical with the axis of the second cavity 42.
Specifically, default origin O can be located on the axis of the second cavity 42 in the left or right side of the second cavity 42
Position.
In the utility model embodiment, the default subtended angle of above-mentioned rotary table cavity be can be through actual needs or experience come really
It is fixed.And in actual design process, rotary table cavity, the length of flared cavity body and circular cylindrical cavity and respective section
Size can also according to actual needs or experience determines.Specifically, when designing dual-circular-polarifeedon feedon source antenna, it can basis
The design requirement of gain and return loss to the dual-circular-polarifeedon feedon source antenna determines the diameter of the large diameter end of light wall loudspeaker.
Further according to the diameter of the large diameter end of light wall loudspeaker, the default subtended angle of rotary table cavity is determined.The large diameter end of light wall loudspeaker it is straight
Diameter is bigger and/or the length of rotary table cavity is shorter, then the subtended angle of rotary table cavity is bigger, conversely, then the subtended angle of rotary table cavity is got over
It is small.Illustratively, the range of the subtended angle of rotary table cavity is 0 °~90 °, and specific subtended angle value can be adjusted according to actual needs.
By designing above-mentioned light wall loudspeaker with contoured, can make dual-circular-polarifeedon feedon source antenna with low sidelobe, broadband,
The beneficial effects such as good isolation and antenna pattern are symmetrical.It hereinafter will be described in detail with above-mentioned beneficial effect.
Optionally, square-circle transition waceguide 3 can be three section octagon squares-circle transition waceguide.
Referring to Fig. 3 a, give the square in Fig. 1-circle transition waceguide 3, i.e. three section octagon squares-circle transition waceguide amplification
Structural schematic diagram afterwards.Three section octagon squares-circle transition waceguide includes:
The 31, second square of the first square-circle transition waceguide-circle transition waceguide 32 and third square-circle transition waceguide successively to connect
33, the first square-circle transition waceguide 31 and the second square-circle transition waceguide 32 cavity are octagon right prism cavity, third square-circle
The cavity of transition waceguide 33 is positive eight deformation right prism cavitys；
First square-circle transition waceguide 31 also connects with circular polarizer 2, third square-circle transition waceguide 33 also with the first cavity
41 connect.
In the utility model embodiment, the output port of circular polarizer 2 is square.The section of first cavity 41 is circle
Shape.So in order to enable electromagnetic wave to propagate between the rectangular waveguide of circular polarizer 2 and the circular waveguide of Feed Horn 4,
Three section octagon squares-circle transition waceguide is connected between circular polarizer 2 and Feed Horn 4.Above-mentioned three sections octagon square-circle transition
Waveguide sequentially connected three sections square-circle transition waceguide due to being made of, wherein the second square-circle transition waceguide 32 is as the
One square-circle transition waceguide 31 and third square-circle transition waceguide 33 transition waceguide, thus entire dual-circular-polarifeedon feedon source can be made
The structure of antenna is more compact, small volume.
Optionally, the central point in the section of third square-circle transition waceguide 33 cavity, the vertical line to the section any side are long
Degree are as follows: more than or equal to the radius in the section of the first cavity 41.
Specifically, the section of the first cavity 41 is circle, the section of third square-circle transition waceguide 33 cavity is positive eight sides
Shape in this implementation new embodiment, designs the central point in the section of third square-circle transition waceguide 33 cavity, to the section times
The length of perpendicular on one side is greater than or equal to the radius in the section of the first cavity 41, can reduce electromagnetic wave from three section octagon squares-
Circle transition waceguide travels to the return loss of Feed Horn 4.
Optionally, the port of one end that circular polarizer 2 connects with the first square-circle transition waceguide 31 is square, the first square-
The port of one end that the cavity of circle transition waceguide 31 connects with circular polarizer 2 are as follows: by what is formed after four angles removal of square
Octagon.
Specifically, that propagates to reduce electromagnetic wave between circular polarizer 2 and three section octagon squares-circle transition waceguide returns
Wave loss can design the octagon formed after removing four angles of above-mentioned square as the first square-circle transition waceguide 31
Cavity section shape.Referring to Fig. 3 a, the area of the area relative square at four angles removed can be very small,
That is the section of the first square-circle transition waceguide 31 cavity can be the octagon being closer to square.
In fig. 3 a, what is provided is in the case where diameter of the side length of square less than the section of the first cavity 41 three
Save a kind of structure type of octagon square-circle transition waceguide.In other embodiments, square side length can also be greater than or wait
Diameter in the section of the first cavity 41, and the second square-circle transition waceguide 32 is used as the first square-circle transition waceguide 31 and third
Square-circle transition waceguide 33 transition waceguide.
In order to more intuitively embody in Fig. 3 a first to the section third square-circle transition waceguide 31-33 shapes and sizes
Relationship gives three section octagon squares-circle transition waceguide schematic cross-section in Fig. 3 a illustrated embodiment referring to Fig. 3 b.Scheming
In 3b, 410 be the cross section profile of the first cavity 41, and 230 be above-mentioned square, the i.e. port 23 (referring to fig. 4) of circular polarizer
Cross section profile, 310 be the first square-circle transition waceguide 31 cross section profile, and 320 take turns for the second square-circle transition waceguide 32 section
Exterior feature, 330 be third square-circle transition waceguide 33 cross section profile.
As can be seen that 410 be a circular contour from Fig. 3 b, 230 be a square profiles, and 310 be by 230 four angles
The octagonal profile formed after removal, 320 be the octagonal profile of the transition from 310 to 330, and 330 be an octagon profile.
Diameter of 230 side length less than 410, and 330 central point to any side length of perpendicular be greater than 410 radius.So second
Square-circle transition waceguide 32 realizes the first square-circle transition waceguide 31 to the transition of third square-circle transition waceguide 33.
Optionally, referring to fig. 4, it gives the amplified structural schematic diagram of circular polarizer 2 in Fig. 1.And Fig. 4 be in order to
Structural schematic diagram given by the cavity body structure of circular polarizer 2 is clearly embodied, the cavity body structure of the circular polarizer 2 in Fig. 1
The as structure, but cavity wall is different at a distance from the outer wall of antenna body.One end with a port 23 of circular polarizer 2
Connect with square-circle transition waceguide 3, there are two one end of port 21 and 22 and 1 phases of rectangular waveguide transformation segment for the tool of circular polarizer 2
It connects.
Specifically, circular polarizer 2 uses the structure of ladder iris type, the circular polarizer of this structure belongs to existing skill
Art, herein without repeating.When the port 21 of line polarization wave feed-in circular polarizer 2 can after the partition panel 20 of circular polarizer
To form left-hand circular polarization wave, which exports from the port of circular polarizer 2 23.When line polarization wave feed-in circular polarisation
The port 22 of device 2 can form right-handed circular polarization wave after the partition panel 20 of circular polarizer, and the right-handed circular polarization wave is from circle
The port 23 of polarizer 2 exports.Since left-hand circular polarization wave and right-handed circular polarization wave are orthogonal, thus left-hand circular polarization wave and dextrorotation
Circularly polarised wave can in same frequency domain and time domain parallel transmission.
Optionally, it gives referring to Fig. 5 and Fig. 1, Fig. 5 by the amplified structural representation of rectangular waveguide transformation segment 1 in Fig. 1
Figure.Rectangular waveguide transformation segment 1 includes: the 4th cavity 101 and the 5th cavity 102；
The port 14 of one end of the port 13 and the 5th cavity 102 of one end of the 4th cavity 101 is arranged at antenna body
Inside, for connecting with circular polarizer 2；
The port 11 of the other end of 4th cavity 101 is located on antenna body, is vertical with the large diameter end of Feed Horn
On first plane a, the port 12 of the other end of the 5th cavity 102 is located on antenna body, is vertical with the large diameter end of Feed Horn
On the second straight plane b；Wherein, the first plane a is parallel with the second plane b.
The port 13 of one end of the 4th cavity 101 connects with the port 21 of circular polarizer 2, one end of the 5th cavity 102
Port 14 connects with the port 22 of circular polarizer 2.The port 11 of the other end of 4th cavity 101 and one end of the 4th cavity 101
Port 13 between connection cavity, can line polarization wave input the 4th cavity 101 the other end port 11 after, to line pole
Change wave and carries out conversion direction and impedance matching.The end of one end of the port 12 and the 5th cavity 102 of the other end of the 5th cavity 102
Connection cavity between mouth 14, can be behind the port 12 for the other end that line polarization wave inputs the 5th cavity 102, to line polarization wave
Carry out conversion direction and impedance matching.
Specifically, above-mentioned conversion direction refers to: converting the direction of propagation of line polarization wave.
Optionally, the line of first nodal point and the second central point is vertical with the axis of the antenna, and first nodal point is
The central point of the port 11 of the other end of 4th cavity 101, the second central point are the port 12 of the other end of the 5th cavity 102
Central point.
Optionally, the port 12 of the other end of the port 11 and the 5th cavity 102 of the other end of the 4th cavity 101 is mark
- 10 ports of quasi- WR (Waveguide, Rectangular, rectangular waveguide).
Specifically, in practical applications, the waveguide flange that dual-circular-polarifeedon feedon source antenna can pass through standard with other component
Disk is attached, thus can be by the port 12 of the port 11 of the other end of the 4th cavity 101 and the other end of the 5th cavity 102
It is disposed as standard WR-10 rectangular waveguide port.Also, by standard WR-10 rectangular waveguide port, TE can be inputted
The line polarization wave of (Transverse electric, transverse electric field) 10 modes.
Below to a kind of function of the various pieces of dual-circular-polarifeedon feedon source antenna provided by the utility model embodiment into
Row is introduced.
Rectangular waveguide transformation segment 1 is used for: behind the port 11 that the first line polarization wave inputs the other end of the 4th cavity 101,
To the first line polarization wave conversion direction and impedance matching, by the port 13 of one end of the 4th cavity 101 by the first line polarization wave
The port 21 of feed-in circular polarizer 2；It is right and behind the port 12 that the second line polarization wave inputs the other end of the 5th cavity 102
Second line polarization wave conversion direction and impedance matching are presented the second line polarization wave by the port 14 of one end of the 5th cavity 102
Enter the port 22 of circular polarizer 2；
Circular polarizer 2 is used for: behind the first line polarization wave feed side mouthfuls 21, generating left-hand circular polarization wave, and by left-handed circle
Polarized wave passes through 23 feed-in of port, three section octagon square-circle transition waceguide the first square-circle transition waceguide 31；And in the second line
Behind polarized wave feed-in port 22, right-handed circular polarization wave is generated, and right-handed circular polarization wave is passed through into 23 feed-in of port, three section octagon
The first square of square-circle transition waceguide-circle transition waceguide 31；
Three section octagon squares-circle transition waceguide is used for: after the first square of left-hand circular polarization wave feed-in-circle transition waceguide 31,
Left-hand circular polarization wave is passed through into 32 feed-in third square of the second square-circle transition waceguide-circle transition waceguide 33, third square-circle little bellow
33 are led by the first cavity of left-hand circular polarization wave feed-in 41；And after the first square of right-handed circular polarization wave feed-in-circle transition waceguide 31,
Right-handed circular polarization wave is passed through into 32 feed-in third square of the second square-circle transition waceguide-circle transition waceguide 33, third square-circle little bellow
33 are led by the first cavity of right-handed circular polarization wave feed-in 41；
Light wall loudspeaker are used for: after the first cavity of left-hand circular polarization wave feed-in 41, left-hand circular polarization wave being passed through third chamber
The large diameter end of body 43 emits to free space；And after the first cavity of right-handed circular polarization wave feed-in 41 after, by dextrorotation entelechy
Change wave to emit by the large diameter end of third cavity 43 to free space.
Be presented above by line polarization wave input rectangular waveguide transformation segment 1, Cong Guangbi loudspeaker export left-hand circular polarization wave and
The example of right-handed circular polarization wave.It in other embodiments, can also be by left-hand circular polarization wave and right-handed circular polarization wave input light wall
Loudspeaker export line polarization wave from rectangular waveguide transformation segment 1.Detail and input line polarization wave-output left-hand circular polarization wave and
The process of right-handed circular polarization wave is opposite.In general, line polarization wave-output left-hand circular polarization wave and right-handed circular polarization wave mistake will be inputted
Journey is known as emission process, and input left-hand circular polarization wave and right-handed circular polarization wave-output line polarization wave process are become and reflected
Journey.
Scheme provided by the embodiment of the utility model uses the cylinder including being sequentially connected in dual-circular-polarifeedon feedon source antenna
The light wall loudspeaker of shape cavity, flared cavity body and rotary table cavity, it is, the profile of the light wall loudspeaker is by several different angles
Broken line composition, can provide more freedom degrees in structure in this way to adjust the overall performance of dual-circular-polarifeedon feedon source antenna, make
Dual-circular-polarifeedon feedon source antenna lower return loss easy to accomplish is obtained, the isolation of dual-circular-polarifeedon feedon source antenna can be improved.And
And the light wall loudspeaker use circular aperture, so that the secondary lobe of dual-circular-polarifeedon feedon source antenna is lower.
Below by a specific example, to the beneficial effect of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model
Fruit is illustrated.
A kind of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model is operable with W frequency range, specifically, can use
In the communication of millimeter wave and Terahertz frequency range.
Referring to Fig. 6, a kind of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model is given in working frequency range
Return loss variation schematic diagram, and the axis of left-hand circular polarization wave and right-handed circular polarization wave emitted is than variation signal
Figure.
In Fig. 6, the frequency of horizontal axis expression dual-circular-polarifeedon feedon source antenna, left side longitudinal axis expression axis ratio (Axial Ratio,
AR), right side longitudinal axis indicates return loss.Two broken lines respectively indicate left-hand circular polarization wave (LHCP, Left Hand Circular
Polarization the axis of axis ratio and right-handed circular polarization wave (RHCP, Right Hand Circular Polarization))
Than dashed circle and arrow on two broken lines indicate: the corresponding longitudinal axis of two broken lines is left side longitudinal axis.Solid black curve indicates
The reflection process of dual-circular-polarifeedon feedon source antenna return loss (| S11|).The hair of black imaginary curve expression dual-circular-polarifeedon feedon source antenna
Penetrate process return loss (| S21|)).Solid black curve and dashed circle and arrow expression on black imaginary curve: black is real bent
Line and the corresponding longitudinal axis of black imaginary curve are right side longitudinal axis.
From fig. 6 it can be seen that dual-circular-polarifeedon feedon source antenna is emitted left-handed in the frequency band that frequency is 75-95GHz
The axis ratio and right-handed circular polarization wave axis ratio of circularly polarised wave illustrate that left-hand circular polarization wave and right-handed circular polarization wave exist within 2dB
Polarization loss between transmitting terminal and receiving end is lower.The emission process of dual-circular-polarifeedon feedon source antenna and the echo damage of reflection process
Consumption is within -10dB.Illustrate that dual-circular-polarifeedon feedon source antenna can realize lower return loss in broadband, it is lower
Return loss can produce good isolation.
Referring to Fig. 7, give a kind of dual-circular-polarifeedon feedon source antenna provided by the embodiment of the utility model emitted it is left-handed
The main polarization directional diagram and Cross polarization pattern of circularly polarised wave.
In Fig. 7, horizontal axis indicates angle of radiation, and the longitudinal axis indicates antenna gain.In Fig. 7, giving centre frequency is
The left-hand circular polarization wave of 85GHz 0 °, 45 ° and 90 ° plane main polarization directional diagram, and in the cross polarization side of 45 ° of planes
Xiang Tu.Phi indicates Plane Angle.
It can be seen from figure 7 that the main lobe of left-hand circular polarization wave differs nearly 30dBi with minor lobe, so secondary lobe is lower.And
In the cross polarization direction of 45 ° of planes, i.e. clockwise direction, the difference of the main lobe of the main lobe and left-hand circular polarization wave of right-handed circular polarization wave
Value is very big, illustrates that cross polarization effect is very good.And the main polarization directional diagram of left-hand circular polarization wave is rotational symmetry.
Referring to Fig. 8, a kind of dextrorotation that dual-circular-polarifeedon feedon source antenna is emitted provided by the embodiment of the utility model is given
The main polarization directional diagram and Cross polarization pattern of circularly polarised wave.
In fig. 8, horizontal axis indicates angle of radiation, and the longitudinal axis indicates antenna gain.In fig. 8, giving centre frequency is
The right-handed circular polarization wave of 85GHz 0 °, 45 ° and 90 ° plane main polarization directional diagram, and in the cross polarization side of 45 ° of planes
Xiang Tu.Phi indicates Plane Angle.
As can be seen from Figure 8, the main lobe of right-handed circular polarization wave differs nearly 20dBi with minor lobe, so secondary lobe is lower.And
In the cross polarization direction of 45 ° of planes, i.e. left hand direction, the difference of the main lobe of the main lobe and right-handed circular polarization wave of left-hand circular polarization wave
Value is very big, illustrates that cross polarization effect is very good.And the main polarization directional diagram of right-handed circular polarization wave is rotational symmetry.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that
There is also other identical elements in the process, method, article or equipment for including element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the protection scope of the utility model.
It is practical new to be all contained in this for any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention
In the protection scope of type.
Claims (10)
1. a kind of dual-circular-polarifeedon feedon source antenna, comprising: rectangular waveguide transformation segment, circular polarizer, the square-circle little bellow successively to connect
It leads and Feed Horn；It is characterized in that, the Feed Horn is light wall loudspeaker；
The Feed Horn includes the first cavity, the second cavity and third cavity；
First cavity is circular cylindrical cavity, and one end of first cavity connects with the square-circle transition waceguide, described the
The other end of one cavity connects with second cavity；
Second cavity is the flared cavity body with default profile, the small-caliber end of second cavity and first chamber
Body connects, and the large diameter end of second cavity connects with the third cavity；
The third cavity is the rotary table cavity with default subtended angle, the top of the third cavity and the second cavity phase
It connects, the bottom end of the third cavity is the large diameter end of the smooth wall loudspeaker.
2. antenna according to claim 1, which is characterized in that the profile of the flared cavity body with default profile is full
Sufficient the following conditions:
Y=sin2.5(x)
Wherein, x is the distance of the default origin O on point X to the axis of second cavity, and the point X is second cavity
Axis on any point, y is in second cavity, comprising the point X and vertical with the axis of second cavity section
The radius in face.
3. antenna according to claim 1, which is characterized in that the square ,-circle transition waceguide is three section octagon squares-justified
Cross waveguide.
4. antenna according to claim 3, which is characterized in that the three sections octagon square-circle transition waceguide includes:
The first square-circle transition waceguide, the second square-circle transition waceguide and the third square-circle transition waceguide successively to connect, described first
The cavity of square-circle transition waceguide and the second square-circle transition waceguide is octagon right prism cavity, and the third square-was justified
The cavity for crossing waveguide is positive eight deformation right prism cavitys；
First square-circle the transition waceguide also connects with the circular polarizer, and the third square-circle transition waceguide is also with described
One cavity connects.
5. antenna according to claim 4, which is characterized in that the section of the cavity of the third square-circle transition waceguide
Central point, to the length of perpendicular of the section any side are as follows: more than or equal to the radius in the section of first cavity.
6. antenna according to claim 4, which is characterized in that the circular polarizer and the first square-circle transition waceguide
The port of the one end to connect is square, one end that the cavity of the first square-circle transition waceguide connects with the circular polarizer
Port are as follows: will the square four angles remove after the octagon that is formed.
7. antenna according to claim 1, which is characterized in that one end with a port of the circular polarizer and institute
It states square-circle transition waceguide to connect, there are two one end of port to connect with the rectangular waveguide transformation segment for the tool of the circular polarizer.
8. antenna according to claim 1, which is characterized in that the rectangular waveguide transformation segment includes: the 4th cavity and
Five cavitys；
The port of one end of the port and the 5th cavity of one end of the 4th cavity is arranged inside antenna body, is used
Connect in the circular polarizer；
The port of the other end of 4th cavity is located on antenna body, vertical with the large diameter end of the Feed Horn
In one plane, the port of the other end of the 5th cavity is located on antenna body, is vertical with the large diameter end of the Feed Horn
In the second straight plane；Wherein, first plane is parallel with second plane.
9. antenna according to claim 8, which is characterized in that the line of first nodal point and the second central point and the day
The axis of line is vertical, and the first nodal point is the central point of the port of the other end of the 4th cavity, second center
Point is the central point of the port of the other end of the 5th cavity.
10. antenna according to claim 8, which is characterized in that the port of the other end of the 4th cavity and described
The port of the other end of five cavitys is the port standard rectangular waveguide WR-10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821589071.XU CN208889854U (en) | 2018-09-28 | 2018-09-28 | A kind of dual-circular-polarifeedon feedon source antenna |
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| CN201821589071.XU CN208889854U (en) | 2018-09-28 | 2018-09-28 | A kind of dual-circular-polarifeedon feedon source antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119764A (en) * | 2018-09-28 | 2019-01-01 | 江苏亨通太赫兹技术有限公司 | A kind of dual-circular-polarifeedon feedon source antenna |
| CN110299616A (en) * | 2019-06-21 | 2019-10-01 | 四川大学 | A kind of lens antenna based on 3D printing technique |
-
2018
- 2018-09-28 CN CN201821589071.XU patent/CN208889854U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119764A (en) * | 2018-09-28 | 2019-01-01 | 江苏亨通太赫兹技术有限公司 | A kind of dual-circular-polarifeedon feedon source antenna |
| CN110299616A (en) * | 2019-06-21 | 2019-10-01 | 四川大学 | A kind of lens antenna based on 3D printing technique |
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