CN107785649A - A kind of three poliarizing antennas - Google Patents
A kind of three poliarizing antennas Download PDFInfo
- Publication number
- CN107785649A CN107785649A CN201610741716.6A CN201610741716A CN107785649A CN 107785649 A CN107785649 A CN 107785649A CN 201610741716 A CN201610741716 A CN 201610741716A CN 107785649 A CN107785649 A CN 107785649A
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- Prior art keywords
- cavity
- coaxial line
- top surface
- paster
- antenna
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of three poliarizing antennas, three poliarizing antenna is cavity body structure, the top surface of the cavity is the medium substrate for covering metal, the bottom surface of the cavity is the metallic plate of ground connection, the inside cavity is provided with the coaxial line of a top surface for passing through the cavity, and the top of the inner wire of the coaxial line is provided with a disk；The top surface of the cavity is provided with microstrip line；The lower surface of the top surface of the cavity is provided with a paster, and a circumferential weld gap is etched with the paster.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of three poliarizing antennas.
Background technology
With the fast development of wireless multimedia service, traffic rate has become the bottleneck of GSM, monopole
Change antenna and dual polarized antenna can not meet on the availability of frequency spectrum, capacity and radiation directivity 3G network, 4G networks with
And the growth requirement of future network；Therefore, three poliarizing antennas are a developing direction of wireless communication system；Including three polarization days
Multi-polarization antenna including line can take less space and realize more statistical iteration multipath passages, effectively improve system
Capacity and transmission rate.
The formation of existing three poliarizing antenna mainly includes following two modes：The first is to be based on metal ring plate and conductor
Three polarization that post is combined, its technical principle are to collectively form three polarization by annular paster and monopole antenna；But pass through
Additional isolation structure and lumped-parameter element can reduce the working band scope of antenna, influence the bandwidth of operation of antenna, unfavorable
In radiation of the antenna in regulation frequency range.It is for second three polarization combined based on separation rectilinear slot with conductor pin, its technology
Principle is by gap of being cracked on paster so that radiation is produced in different polarised directions；But it can be produced in ground plane gap of cracking
Larger backward radiation, very big loss and useless stray wave are produced to the radiation energy of antenna.The poliarizing antenna of above two three
Generation type be by increase monopole radiating element realize three polarization design, it is impossible to ensure it is each polarization port isolation
The polarization purity of degree and corresponding ports.
In traditional communication system, the common space diversity technology of generally use realizes the application of multiple antennas；Space diversity
Technology, come reception signal, but just can guarantee that when the distance only between antenna is more than half-wavelength and connect using more secondary independent antennas
Fading characteristic by aerial signal is separate；When distance between antennas reduces, the coupled problem of antenna becomes increasingly
Seriously.
The content of the invention
In view of this, the embodiment of the present invention it is expected to provide a kind of three poliarizing antennas, it is possible to increase the polarization purity of radiation field
And antenna respectively polarizes the isolation of port, the interference between each port of antenna is preferably minimized, solves the coupled problem of antenna.
What the technical scheme of the embodiment of the present invention was realized in：
The embodiment of the present invention provides a kind of three poliarizing antennas, and three poliarizing antenna is cavity body structure, the top of the cavity
Face is the medium substrate for covering metal, and the bottom surface of the cavity is metallic plate, and the inside cavity is provided with one through the cavity
The coaxial line of top surface, the top of the inner wire of the coaxial line are provided with a disk；
The top surface of the cavity is provided with microstrip line；
The lower surface of the top surface of the cavity is provided with a paster, and a circumferential weld gap is etched with the paster.
In the embodiment of the present invention, the lower surface of the cavity top surface, the paster and the ring is completely covered in the paster
The geometric center in gap overlaps, and the paster is parallel while with the circumferential weld gap.
In the embodiment of the present invention, four drift angles of the upper surface of the cavity top surface are close in the side of the microstrip line, put down
The drift angle is divided to place.
In the embodiment of the present invention, the outer conductor of the coaxial line is metallic conductor pipe, and the inner wire of the coaxial line is gold
Belong to conductor column, the inner wire of the coaxial line stretches out the coaxial line through the center of the outer conductor of the coaxial line
Outer conductor.
In the embodiment of the present invention, the side of the cavity is metallic plate, the side of the cavity and the side phase of the paster
Even.
In the embodiment of the present invention, the coaxial line passes through the center of the top surface of the cavity, the outer conductor of the coaxial line
Bottom be connected with the bottom surface of the cavity, the top of the outer conductor of the coaxial line is connected with the paster.
In the embodiment of the present invention, three poliarizing antenna includes a coaxial feed port and two feed microstrip line ends
Mouthful；Wherein, the coaxial feed port is located at the bottom of the outer conductor of the coaxial line and the bottom of the inner wire of the coaxial line
Between end；Described two feed microstrip line ports are located at two microstrip lines of the arbitrary neighborhood in four microstrip lines respectively
On.
In the embodiment of the present invention, the top surface of the cavity is the two-sided microwave-medium substrate for covering metal.
In the embodiment of the present invention, the bottom surface ground connection of the cavity.
Three poliarizing antennas that the embodiment of the present invention is provided, three poliarizing antenna are cavity body structure, the top of the cavity
Face is the two-sided medium substrate for covering metal, and the bottom surface of the cavity is metallic plate, and the inside cavity passes through the chamber provided with one
The coaxial line of the top surface of body, the top of the inner wire of the coaxial line are provided with a disk；The top surface of the cavity is provided with microstrip line；
The lower surface of the top surface of the cavity is provided with a paster, and the center of the paster is etched with a circumferential weld gap.In this way, utilize loading
The isolation of microstrip line improves the polarization purity of radiation field and antenna respectively polarizes port, drops to the interference between three circuit-switched datas
It is minimum；Because the microstrip line is located at the vertex of the upper surface of the cavity top surface, i.e., further carried by the way of corner-fed
High antenna respectively polarizes the isolation of port；Outer conductor by the use of inner wire as a port feeder line of the coaxial line is reduced
The height of the cavity, realize the Miniaturization Design of antenna；Pass through the disk at the top of the inner wire of the coaxial line
Loading monopole antenna reduces the space of antenna occupancy；The directionality and gain intensity of antenna are improved by back cavity structure,
Allow users to receive stronger signal.
Brief description of the drawings
Fig. 1 is the composition structural representation of the poliarizing antenna of the embodiment of the present invention three；
Fig. 2 is the structural representation of the top surface of cavity of the embodiment of the present invention；
Fig. 3 is the structural representation of coaxial line of the embodiment of the present invention；
Fig. 4 is the antenna direction schematic diagram that the microstrip-fed port 8 of the embodiment of the present invention is encouraged；
Fig. 5 is the antenna direction schematic diagram that the microstrip-fed port 9 of the embodiment of the present invention is encouraged；
Fig. 6 is the antenna direction schematic diagram of coaxial feed of embodiment of the present invention port excitation；
Fig. 7 is the frequency curve schematic diagram of three interport isolations of antenna of the embodiment of the present invention；
Fig. 8 is the frequency curve schematic diagram of three feed port return losses of antenna of the embodiment of the present invention.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of composition structural representation of three poliarizing antennas, as shown in figure 1, three poliarizing antenna is cuboid cavity knot
Structure, the top surface 1 of the cavity are the square microwave-medium substrate of double-sided copper-clad, and four side 2-5 of the cavity are shape
Identical rectangle copper coin, the bottom surface 6 of the cavity are the square copper coin of ground connection；The inside cavity passes through provided with one
The coaxial line of the top surface 1 of the cavity, the outer conductor 13 of the coaxial line are copper conductor pipe, the inner wire 14 of the coaxial line
For copper conductor cylinder, the top of inner wire 14 of the coaxial line is provided with a disk 15.
The structural representation of the top surface 1 of the cavity, as shown in Fig. 2 the upper surface of the top surface 1 of the cavity is provided with four
Identical rectangular microstrip line 7-10, is close to four drift angles of the upper surface of the top surface 1 of the cavity respectively, and divides the drift angle equally
Place；The lower surface of the top surface 1 of the cavity is provided with a square patch 11, and the chamber is completely covered in the area of the paster 11
The lower surface of the top surface 1 of body；A square loop gap 12, the paster 11 and the ring are etched with the center of the paster 11
The geometric center in gap 12 overlaps, and the square patch 11 while with the square loop gap 12 while it is parallel.
The structural representation of the coaxial line, as shown in figure 3, the bottom of the outer conductor 13 of the coaxial line and the cavity
Bottom surface 6 be connected, the inner wire 14 of the coaxial line be located at the center of the outer conductor 13 of the coaxial line, the two form one together
Axis, the center of the top surface 1 of the excessively described cavity of the coaxial line；The top of the inner wire 14 of the coaxial line is provided with a disk
15, the outer conductor 13 of the coaxial line, the inner wire 14 of the coaxial line and the disk 15 form the monopole of disk loading
Antenna, the feed port of the monopole antenna are bottom and the inner wire 14 of the coaxial line of the outer conductor 13 of coaxial line
The coaxial feed port 16 formed between bottom.Utilize the capacitive load on monopole antenna top, it is possible to reduce monopole radiates
The height of body；Generally, in 2.35GHz working frequency, quarter-wave monopole antenna needs 32mm height, this hair
The disk loading monopole antenna that bright embodiment uses only needs 19mm height, reduces the space of antenna occupancy, realizes day
The Miniaturization Design of line.
In the embodiment of the present invention, three poliarizing antenna shares three feed ports, except the above-mentioned disk loading referred to
Monopole antenna, an in addition to dual polarization rectangular patch antenna；The feed port of the dual polarized antenna is rectangular microstrip
Two feed microstrip line ports that line 8 and rectangular microstrip line 9 are formed, the feed port of the dual polarized antenna can also be rectangle
Two feed microstrip line ports that microstrip line 9 and rectangular microstrip line 10 are formed, or rectangular microstrip line 10 and rectangular microstrip line 7 are formed
Two feed microstrip line ports, or two feed microstrip line ports that rectangular microstrip line 7 and rectangular microstrip line 8 are formed.
With reference to above-mentioned Fig. 1, Fig. 2, Fig. 3, the operation principle of three poliarizing antennas described in the embodiment of the present invention is illustrated.
Specifically, as shown in figure 1, when being fed in microstrip-fed port 8, circumferential weld gap 12 will be produced along the line pole of Y direction
Change radiation field；In 2.35GHz frequencies, the antenna radiation pattern of the microstrip-fed excitation of port 8, as shown in figure 4, Fig. 4 a put down for yoz
The antenna radiation pattern that the microstrip-fed port 8 in face is encouraged, Fig. 4 b are the antenna radiation pattern that xoz planar microstrips feed port 8 encourages.
When microstrip-fed port 9 is fed, circumferential weld gap 12 will be produced along the linearly polarized radiation field of X-direction；It is micro- in 2.35GHz frequencies
The antenna radiation pattern encouraged with feed port 9, as shown in figure 5, Fig. 5 a are the antenna side that yoz planar microstrips feed port 9 encourages
Xiang Tu, Fig. 5 b are the antenna radiation pattern that xoz planar microstrips feed port 9 encourages.It can be seen from Fig. 4 and Fig. 5, due to antenna structure
Symmetry, directional diagram when microstrip-fed port 8 and microstrip-fed port 9 are encouraged respectively at 2.35GHz frequencies is in numerical value
On be identical, be orthogonal on direction；The electric field component parallel that microstrip-fed port 8 receives is in y-axis, micro-strip
The electric field component parallel that feed port 9 receives is in x-axis；And on greatest irradiation direction, the cross polarization point of the radiation field of antenna
Amount reaches 6.5dB than main polarization low more than 30dB, the gain of antenna.Therefore, by loading and two microstrip-fed ports to top
The microstrip line 7 and microstrip line 10 of the same size of position, improve linearly polarized radiation field and the linear polarization of Y direction of X-direction
The polarization purity of radiation field, while also increase the isolation of microstrip-fed port 8 and microstrip-fed port 9.Due to the patch
Electric field of two orthogonal modes of driver at paster center is all zero on piece 11, it is possible at the center of the paster 11
Place adds short circuit condition without being had an impact to two orthogonal modes.
As shown in figure 3, the top of the inner wire 14 of the coaxial line is provided with a disk 15, the outer conductor of the coaxial line
13rd, the inner wire 14 of the coaxial line and the disk 15 form the monopole antenna of disk loading, the monopole antenna
Feed port for the outer conductor 13 of coaxial line bottom and the coaxial line inner wire 14 bottom between the coaxial feed that is formed
Electric port 16；Now, when coaxial feed port 16 is encouraged, will produce along the linearly polarized radiation field of Z-direction；In 2.40GHz frequencies
During point, the antenna radiation pattern of the excitation of coaxial feed port 16, encouraged as shown in fig. 6, Fig. 6 a are xoz planar coaxials feed port 16
Antenna radiation pattern, Fig. 6 b be yoz planar coaxials feed port 16 encourage antenna radiation pattern.In the Working mould of monopole antenna
In formula, the paster 11 is used as the earth.Due to combining back cavity structure so that antenna is in the smaller condition of contact area
Under, it is possible to realize preferable directional emission field；It can be seen from Fig. 6, coaxial feed port 16 is encouraged at 2.40GHz frequencies
When, the maximum of the directional diagram of coaxial feed port 16 is in xoy planes, and the electric field component parallel of reception is in z-axis.
Therefore, three feed ports of antenna are can be seen that according to Fig. 4, Fig. 5 and Fig. 6 to be received respectively parallel to x,
The electric field component of tri- normal axis of y, z.Meanwhile the outer conductor 13 of the coaxial line helps to reduce the height of the cavity, carries
Shape purity in field in high pitched tune body, and then improve the isolation between each port of antenna；The frequency curve of three interport isolations of antenna,
As shown in Figure 7, it can be seen that in the range of working band, the isolation between three feed ports of antenna is all higher than 25dB,
With good anti-jamming effectiveness.
The frequency curve of three feed port return loss of antenna, as shown in figure 8, due to the symmetry of antenna structure,
The return loss of feed microstrip line port 8 and feed microstrip line port 9 is identical in theory, the He of feed microstrip line port 8
Return loss bandwidth range of the feed microstrip line port 9 below -10dB is 2.31GHz~2.39GHz, in center frequency point
It is less than -35dB at 2.35GHz；Return loss bandwidth range of the coaxial feed port 16 below -10dB be 2.23GHz~
2.60GHz, bandwidth reach 370MHz.
In above-mentioned implementation, the length of the top surface 1 of the cavity can be 42~46mm, the top surface 1 of the cavity
Width can be 42~46mm, and the thickness of the top surface 1 of the cavity can be 0.8~1.5mm, the phase of the top surface 1 of the cavity
It is 1.2~3.5 to dielectric constant, the loss tangent of the top surface 1 of the cavity is not more than 0.01；The rectangular microstrip line 7-
10 length can be 12~14mm, and rectangular microstrip line 7-10 width can be 1.6~2mm；The paster 11 is square,
The length of side of the paster can be 42~46mm；The inner side length of side in the square loop gap 12 can be 30.0~32.0mm,
The outside length of side in the square loop gap 12 can be 34.0~36.0mm；Four side 2-5 of cavity length can
Think 42~46mm, width can be 14~15.5mm, four side 2-5 of cavity long side respectively with the paster 11
Four sides be connected, form four sides of cavity antenna；The length of side of the bottom surface 6 of the cavity is more than or equal to the cavity
Top surface 1 the length of side, can be 42~46mm；The outer conductor 13 of the coaxial line is conductor tube, the outer conductor of the coaxial line
13 horizontal plane projection positioned at the geometric center on the ground of the cavity, the internal diameter of the outer conductor 13 of the coaxial line can be
3.2~3.6mm, the pipe thickness of the outer conductor 13 of the coaxial line can be 0.2~0.4mm, the outer conductor of the coaxial line
13 height can be 21.4~22.4mm；The inner wire 14 of the coaxial line is conductor column, the inner wire of the coaxial line
14 basal diameter can be 1.2~1.6mm, and the height of the inner wire 14 of coaxial line can be 34.4~35.4mm；The circle
The diameter of disk 15 can be 9.5~10.5mm, and the thickness of the disk 15 can be 0.4~0.6mm.
In above-mentioned implementation, the top surface 1 of the cavity, four side 2-5 of the cavity, the cavity bottom surface 6,
The inner wire 14 of the coaxial line, the material of the outer conductor 13 of the coaxial line can also be other conductive golds beyond copper removal
Category；The size of all parts for forming three poliarizing antennas can be to meet other values of size relationship between all parts.
To sum up, three poliarizing antennas that the embodiment of the present invention is provided are that one kind is compact-sized, isolation characteristic is good, radiation field
High new three poliarizing antenna of polarization purity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
Claims (9)
1. a kind of three poliarizing antennas, it is characterised in that three poliarizing antenna is cavity body structure, and the top surface of the cavity is to cover gold
The medium substrate of category, the bottom surface of the cavity is metallic plate, and the inside cavity is provided with one through the same of the top surface of the cavity
Axis, the top of the inner wire of the coaxial line are provided with a disk；
The top surface of the cavity is provided with microstrip line；
The lower surface of the top surface of the cavity is provided with a paster, and a circumferential weld gap is etched with the paster.
2. three poliarizing antenna according to claim 1, it is characterised in that the paster is completely covered under the cavity top surface
Surface, the paster overlap with the geometric center of the circumferential weld gap, and the paster is parallel while with the circumferential weld gap.
3. three poliarizing antenna according to claim 1 or claim 2, it is characterised in that be close to the cavity in the side of the microstrip line
Four drift angles of the upper surface of top surface, divide the drift angle equally and place.
4. three poliarizing antenna according to claim 1 or claim 2, it is characterised in that the outer conductor of the coaxial line is metallic conductor
Pipe, the inner wire of the coaxial line is metallic conductor cylinder, and the inner wire of the coaxial line passes through the outer conductor of the coaxial line
Center, and stretch out the outer conductor of the coaxial line.
5. three poliarizing antenna according to claim 1 or claim 2, it is characterised in that the side of the cavity is metallic plate, the chamber
The side of body is connected with the side of the paster.
6. three poliarizing antenna according to claim 4, it is characterised in that the coaxial line is passed through in the top surface of the cavity
The heart, the bottom of the outer conductor of the coaxial line are connected with the bottom surface of the cavity, the top of the outer conductor of the coaxial line and institute
Paster is stated to be connected.
7. three poliarizing antenna according to claim 4, it is characterised in that three poliarizing antenna includes a coaxial feed end
Mouth and two feed microstrip line ports；Wherein,
The coaxial feed port be located at the bottom of the outer conductor of the coaxial line and the inner wire of the coaxial line bottom it
Between；
Described two feed microstrip line ports are located on two microstrip lines of the arbitrary neighborhood in four microstrip lines respectively.
8. three poliarizing antenna according to claim 1 or claim 2, it is characterised in that the top surface of the cavity is the two-sided metal that covers
Microwave-medium substrate.
9. three poliarizing antenna according to claim 1 or claim 2, it is characterised in that the bottom surface ground connection of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610741716.6A CN107785649A (en) | 2016-08-26 | 2016-08-26 | A kind of three poliarizing antennas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610741716.6A CN107785649A (en) | 2016-08-26 | 2016-08-26 | A kind of three poliarizing antennas |
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| CN107785649A true CN107785649A (en) | 2018-03-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864366A (en) * | 2020-07-24 | 2020-10-30 | 上海炫雅科技有限公司 | Antenna structure for improving cross polarization performance of dual-polarization microstrip antenna |
| CN112688069A (en) * | 2020-12-21 | 2021-04-20 | 西安电子科技大学 | Three-polarization unit with adjustable directional diagram and array antenna thereof |
| CN113016107A (en) * | 2018-06-27 | 2021-06-22 | 安费诺天线解决方案公司 | Four-port radiating element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483277A (en) * | 2008-12-30 | 2009-07-15 | 清华大学 | Triple polarized conformal antenna |
| CN104868247A (en) * | 2015-05-22 | 2015-08-26 | 厦门大学 | Circular back cavity structure directivity three-polarization antenna |
-
2016
- 2016-08-26 CN CN201610741716.6A patent/CN107785649A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483277A (en) * | 2008-12-30 | 2009-07-15 | 清华大学 | Triple polarized conformal antenna |
| CN104868247A (en) * | 2015-05-22 | 2015-08-26 | 厦门大学 | Circular back cavity structure directivity three-polarization antenna |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113016107A (en) * | 2018-06-27 | 2021-06-22 | 安费诺天线解决方案公司 | Four-port radiating element |
| CN111864366A (en) * | 2020-07-24 | 2020-10-30 | 上海炫雅科技有限公司 | Antenna structure for improving cross polarization performance of dual-polarization microstrip antenna |
| CN112688069A (en) * | 2020-12-21 | 2021-04-20 | 西安电子科技大学 | Three-polarization unit with adjustable directional diagram and array antenna thereof |
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Application publication date: 20180309 |