CN107394391A - A kind of broadband direction figure diversity paster antenna - Google Patents
A kind of broadband direction figure diversity paster antenna Download PDFInfo
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- CN107394391A CN107394391A CN201710539439.5A CN201710539439A CN107394391A CN 107394391 A CN107394391 A CN 107394391A CN 201710539439 A CN201710539439 A CN 201710539439A CN 107394391 A CN107394391 A CN 107394391A
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- 239000004020 conductor Substances 0.000 claims abstract description 18
- 238000010586 diagram Methods 0.000 abstract description 26
- 238000004891 communication Methods 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000005388 cross polarization Methods 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 description 8
- 230000005684 electric field Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
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Abstract
A kind of broadband direction figure diversity paster antenna, including circular patch, dielectric-slab, the co-planar waveguide positioned at dielectric-slab side, the folding microstrip line positioned at dielectric-slab opposite side, circular floor, feed port one, feed port two；Dielectric-slab is vertically placed between paster and floor；The outer conductor of co-planar waveguide is connected with floor, and inner wire one end is connected with paster, and the other end is connected with feed port one；Microstrip line is folded with feed port two to be connected；The antenna can realize directional diagram diversity in wider frequency range；With size is small, bandwidth, isolation is high, cross polarization is small the advantages of, suitable for the various wireless communication system using WLAN as representative.
Description
Technical field
The invention belongs to antenna technical field, is related to a kind of wideband patch antenna, more particularly to a kind of broadband direction figure point
Collect paster antenna.
Background technology
Angle diversity is one of important technical of MIMO communication system.By producing multiple wave beams, and allow these ripples
Space angles different Shu Zhixiang, angle diversity antenna can effectively improve the channel capacity of mimo system.Indoor environment is people
The scene often occurred in daily life.In such a scenario, because the reflection of wall, object block, electromagnetic wave can go out
A variety of performances such as existing direct projection, reflection, scattering.Therefore, indoor multipath effect is obvious, is adapted to use MIMO technology to resist interference
With raising radio transmission speed.Compared to space diversity and polarity diversity, the antenna beam covering of angle diversity is wide, is especially suitable for
Indoor this reflection of electromagnetic wave is compared with strong, the widespread scene of angle of arrival.Towards the directional diagram of zenith radiation and the horizontal omnidirectional of updip
Directional diagram is the typical combination for realizing angle diversity.In this configuration, two kinds of direction diagram forms are complementary, one of which directional diagram
Radiation compared with weakness be the radiation of another directional diagram compared with strong point.Both combine, and can ensure in wider spatial dimension
Preferable signal covering.
Due to having the advantages that cost is low, section is low, easy to process, paster antenna be produce towards zenith antenna pattern and
The principal antenna form of horizontal omnidirectional directional diagram.When from center fed patch, antenna produces the horizontal omnidirectional directional diagram of updip；
When from off-center position fed patch, antenna produces the directional diagram towards zenith radiation.A therefore it may only be necessary to radiation patch
With two sets of independent feeding networks, angle diversity can be achieved in this design.However, there is also some to have much room for improvement for this design
The problem of.First is that bandwidth is narrow.The Q values of paster antenna are higher, cause narrower bandwidth, it is impossible to meet the broadbands such as 4G communications
The demand of system.Second is feeding network complexity.Two sets of feeding networks are required for taking the circuit of certain size, add antenna
Overall dimensions.During especially with balanced feeding, the structure of feeding network is more complicated, and the processing of antenna becomes difficult.Therefore, if
Meter has great importance with broadband, the angle diversity paster antenna of small-sized feeding network.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide a kind of broadband direction figure diversity paster
Antenna, by designing two sets of compact feeding networks, two directions with angle diversity can be provided in wider frequency range
Figure, is a kind of wide band angle diversity antenna suitable for MIMO communication system, has small size, bandwidth, isolation is high, hands over
The advantages of fork polarization is small, suitable for the various wireless communication system using WLAN as representative.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of broadband direction figure diversity paster antenna, including circular patch 1, dielectric-slab 2, co-planar waveguide 3, fold microstrip line
5, circular floor 6, feed port 1, feed port 27, wherein：
The circular patch 1 is parallel with circular floor 6, and both centers of circle are on same axis；
The dielectric-slab 2 is vertically arranged between circular patch 1 and circular floor 6, and dielectric-slab 2 and circular patch 1 with
Circular floor 6 is intersecting；
The feed port 1 and feed port 27 are respectively positioned on circular floor 6；
The co-planar waveguide 3 is printed in the one side of dielectric-slab 2, folds the another side that microstrip line 5 is printed in dielectric-slab 2；
The co-planar waveguide 3 includes one piece of inner wire 4 and two pieces of outer conductors 9, and inner wire 4 is between two pieces of outer conductors 9
And be respectively provided with certain distance with the outer conductor 9 of both sides, one end of the inner wire 4 is connected vertically with circular patch 1, the other end with
Feed port 1 is connected, and one end of the outer conductor 9 is connected vertically with circular floor 6, has certain distance with circular patch 1；
The folding microstrip line 5 is L-shaped structure, and one end is another across two bar grooves between the internal and external conductor of co-planar waveguide 3
End is connected with feed port 27.
The co-planar waveguide 3 passes through the center of circle on circular floor 6, and symmetrical on the center of circle on circular floor 6.
The feed port 1 is located at the center of circle on circular floor 6.
The interface shape of the feed port 1 and feed port 27 is sub-miniature A connector, and two ports pass through in circle
The two Kong Laiyu sub-miniature A connectors etched on floor 6 are connected.
The dielectric-slab 2 is FR4 plates, relative dielectric constant 4.4, dielectric loss 0.02.
A diameter of 56mm of the circular patch 1, a diameter of 140mm on circular floor 6, circular patch 1 and circular floor 6
Distance be 14mm, the thickness of dielectric-slab 2 is 1mm, length 35mm, is highly 14mm；The length of outer conductor 9 is 16.45mm, height
For 12.8mm, the line width of inner wire 4 is 1.5mm, and the width of the groove of the right and left of inner wire 4 is 0.3mm；Fold microstrip line 5
In, the length of horizontal segment is 21.5mm, and the length of vertical section is 9.2mm, and line width is 1mm, vertical section and dielectric-slab (2) edge
Closer distance be 6mm.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) two independent feeding networks are provided with a circuit, effectively reduces the size and drop of feeding network
The low complexity of antenna；
(2) two feeding networks are balanced feeding so that antenna has the advantages of directional diagram is symmetrical, cross polarization is small；
(3) broader bandwidth of antenna, the improvement of band merit is more apparent compared with having designed, and the end in frequency band range
Mouth isolation is high.
Brief description of the drawings
Fig. 1 is the three dimensional structure diagram of angle diversity paster provided by the invention.
Fig. 2 is side view of the antenna embodiment along y-axis in Fig. 1.
Fig. 3 is side view of the antenna embodiment along x-axis in Fig. 1, and unit is millimeter (mm).
Fig. 4 is the dielectric-slab front-side circuit figure of antenna embodiment in Fig. 1, and unit is millimeter (mm).
Fig. 5 is the dielectric-slab back-side circuit figure of antenna embodiment in Fig. 1, and unit is millimeter (mm).
Fig. 6 is the scattering parameter figure that antenna embodiment emulates in Fig. 1.
Fig. 7 is the antenna pattern in x-z-plane when antenna embodiment port 1 is encouraged in Fig. 1.
Fig. 8 is the antenna pattern in x-z-plane when antenna embodiment port 2 is encouraged in Fig. 1.
Fig. 9 is the gain diagram of antenna embodiment both direction figure in Fig. 1.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
The tomograph of the broadband direction figure diversity paster antenna of the present invention is as shown in figure 1, the circular patch including top layer
Piece 1, the circular floor 6 of the dielectric-slab 2 placed vertically and bottom.Dielectric-slab 2 intersects with circular patch 1 and circular floor 6.For
The shape of display medium plate 2, the circular patch 1 in figure are shifted a segment distance along z-axis forward direction.Dielectric-slab 2 is positioned over x-axis
On, and it is symmetrical on y-axis.Two holes are carved with circular floor 6, are respectively intended to feed-in two paths of signals.
The directional diagram diversity antenna of the present invention is as shown in Figure 2 along the side view of y-axis.The one side of dielectric-slab 2 is printed with coplanar
Waveguide 3, another side, which is printed with, folds microstrip line 5.In order to show the shape for folding microstrip line 5, dielectric-slab 2 is arranged to transparency
Body.One end of inner wire 4 of co-planar waveguide 3 is connected with circular patch 1, and the other end is connected with feed port 1；Co-planar waveguide 3 is left
The outer conductor 9 on right both sides is connected with circular floor 6.The one end of microstrip line 5 is folded across the line of rabbet joint of co-planar waveguide 3, the other end and feedback
Electric port 27 is connected.
The directional diagram diversity antenna of the present invention is as shown in Figure 3 along the side view of y-axis.A diameter of 56mm of circular patch 1, circle
A diameter of 140mm on shape floor 6.The distance of two disks is determined by the height of dielectric-slab 2, and 14mm is taken in embodiment.Dielectric-slab 2
For conventional FR4 plates, relative dielectric constant 4.4, dielectric loss 0.02, thickness 1mm.
The dielectric-slab front-side circuit of the directional diagram diversity antenna of the present invention is as shown in Figure 4.The size of dielectric-slab 2 be 35mm ×
14mm.The front of dielectric-slab 2 is printed with a co-planar waveguide 3.The size of outer conductor 9 of the right and left of co-planar waveguide 3 is
16.45mm × 12.8mm, the line width of inner wire 4 is 1.5mm, and the width of the groove of the right and left of inner wire 4 is 0.3mm.
The dielectric-slab back-side circuit of the directional diagram diversity antenna of the present invention is as shown in Figure 4.The back up of dielectric-slab has one
Fold microstrip line 5.The L-shaped that is shaped as of microstrip line 5 is folded, the length of two segmentations is respectively 9.2mm and 21.5mm, and line width is
1mm.It is 6mm to fold microstrip line 5 and the distance of the left side edge of dielectric-slab 2.
The technical proposal of the invention is realized in this way：
The horizontal omnidirectional antenna pattern of updip by paster TM01Pattern provides.The center of circle of circular patch 1 and co-planar waveguide
3 inner wire 4 is connected.When feed port 28 has energy feed-in, the strange mould of co-planar waveguide 3 is energized, and electric field is led by interior
Body 4 points to the outer conductor 9 of the right and left, causes the electric current on circular patch 1 to point to circumference along radial direction by the center of circle.Therefore,
Circular patch 1 is operated in TM01Pattern, corresponding directional diagram are horizontal omnidirectional antenna pattern.Due to the presence on circular floor 6,
Wave beam is inclined upwardly.
TM towards the directional diagram that zenith radiates by paster11Pattern provides.Microstrip line 5 is folded across two of co-planar waveguide 3
Groove.When feed port 28 has energy feed-in, the electric current on folding microstrip line 5 causes the electric field in two bar grooves of co-planar waveguide 3
Direction is identical, and the even mould of co-planar waveguide 3 is energized.Electric current on circular patch 1 along the x-axis direction, and the electricity on the positive and negative semiaxis of x-axis
It is identical to flow phase.Therefore, circular patch 1 is operated in TM11Pattern, corresponding directional diagram are the directional diagram towards zenith radiation.
Under Qi Mo and even mould working condition, the electric field in the groove of co-planar waveguide 3 show as respectively it is in the same direction and reverse, therefore two
Individual pattern has natural orthogonality, and two ports can realize high isolation.
The structure of embodiments of the invention is described as follows：
Size is embodied as shown in Fig. 3, Fig. 4 and Fig. 5.The broadband direction figure point made with above-mentioned 3 figure illustrated dimensions
The scattering coefficient result for collecting paster antenna emulation is as shown in Figure 6.The reflectance factor of port 1 has 1 trough, -10dB in frequency band
With a width of 920MHz (2.17~3.09GHz).The reflectance factor of port 2 has 2 troughs in frequency band, and -10dB is with a width of
820MHz (2.11~2.93GHz).The a width of 760MHz of band (2.17~2.93GHz) that two ports are satisfied by -10dB.Band herein
In width, the isolation of two ports is in more than 27dB.
The radiation that the broadband direction figure diversity paster antenna made with above-mentioned 3 figure illustrated dimensions emulates in x-z-plane
Directional diagram result such as Fig. 7 and as shown in Figure 8.When port 1 is encouraged, the directional diagram of antenna is the directional diagram towards zenith radiation.Side
To the main polarization symmetrical of figure, the front and rear cross polarization than in more than 15dB, whole plane is in more than 24dB.When port 2 is encouraged
When, the directional diagram of antenna is the horizontal omnidirectional directional diagram of updip.Directional diagram it is main polarization symmetrical, beam position is in θ=40 ° side
To the cross polarization in whole plane is in more than 34dB.
Gain results such as Fig. 9 institutes that the broadband direction figure diversity paster antenna made with above-mentioned 3 figure illustrated dimensions emulates
Show.In impedance bandwidth, the gain of port 1 is in more than 9dBi, peak gain 10.1dBi, the fluctuation range of the gain of port 2
For between 3.5dBi to 5.6dBi.
The broadband direction figure diversity paster antenna only needs the size for taking 1 feeding network can be in broad frequency range
Inside realize angle diversity.Presently preferred embodiments of the present invention is the foregoing is only, any formal restriction not is made to the present invention,
Every equivalent changes and modifications made within the scope of the invention as claimed, all should belong to the claims in the present invention covers model
Enclose.
Claims (7)
1. a kind of broadband direction figure diversity paster antenna, it is characterised in that including circular patch (1), dielectric-slab (2), coplanar ripple
Lead (3), folding microstrip line (5), circular floor (6), feed port one (8), feed port two (7), wherein：
The circular patch (1) is parallel with circular floor (6), and both centers of circle are on same axis；
The dielectric-slab (2) is vertically arranged between circular patch (1) and circular floor (6), and dielectric-slab (2) and circular patch
(1) intersect with circular floor (6)；
The feed port one (8) and feed port two (7) are respectively positioned on circular floor (6)；
The co-planar waveguide (3) is printed in the one side of dielectric-slab (2), folds microstrip line (5) and is printed in the another of dielectric-slab (2)
Face；
The co-planar waveguide (3) includes one piece of inner wire (4) and two pieces of outer conductors (9), and inner wire (4) is located at two pieces of outer conductors
(9) certain distance is respectively provided between and with the outer conductor (9) of both sides, one end of the inner wire (4) and circular patch (1) are vertical
It is connected, the other end is connected with feed port one (8), and one end of the outer conductor (9) is connected vertically with circular floor (6), with circle
Shape paster (1) has certain distance；
The folding microstrip line (5) is L-shaped structure, and one end is another across two bar grooves between co-planar waveguide (3) internal and external conductor
End is connected with feed port two (7).
2. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that the co-planar waveguide (3) is passed through
The center of circle of circular floor (6), and it is symmetrical on the center of circle of circular floor (6).
3. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that described (8) position of feed port one
In the center of circle of circular floor (6).
4. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that the feed port one (8) and
The interface shape of feed port two (7) is sub-miniature A connector, and two ports by two holes being etched on circular floor (6) come
It is connected with sub-miniature A connector.
5. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that the dielectric-slab (2) is FR4
Plate, relative dielectric constant 4.4, dielectric loss 0.02.
6. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that the outer conductor (9) is on interior
Conductor (4) is symmetrical.
7. broadband direction figure diversity paster antenna according to claim 1, it is characterised in that the circular patch (1) it is straight
Footpath is 56mm, a diameter of 140mm of circular floor (6), and the distance on circular patch (1) and circular floor (6) is 14mm, dielectric-slab
(2) thickness is 1mm, length 35mm, is highly 14mm；Outer conductor (9) length is 16.45mm, is highly 12.8mm, inner wire
(4) line width is 1.5mm, and the width of the groove of inner wire (4) the right and left is 0.3mm；Fold in microstrip line (5), horizontal segment
Length be 21.5mm, the length of vertical section is 9.2mm, and line width is 1mm, vertical section and the relatively low coverage at dielectric-slab (2) edge
From for 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539439.5A CN107394391B (en) | 2017-07-04 | 2017-07-04 | Broadband directional diagram diversity patch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539439.5A CN107394391B (en) | 2017-07-04 | 2017-07-04 | Broadband directional diagram diversity patch antenna |
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| Publication Number | Publication Date |
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| CN107394391A true CN107394391A (en) | 2017-11-24 |
| CN107394391B CN107394391B (en) | 2020-08-04 |
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| CN201710539439.5A Expired - Fee Related CN107394391B (en) | 2017-07-04 | 2017-07-04 | Broadband directional diagram diversity patch antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980346A (en) * | 2019-04-08 | 2019-07-05 | 东南大学 | A kind of high-isolation bimodulus ultra wide band mimo antenna |
| CN115986403A (en) * | 2023-03-20 | 2023-04-18 | 广东工业大学 | Low-profile high-isolation polarization diversity patch antenna and wireless communication equipment |
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| CN106654529A (en) * | 2016-12-29 | 2017-05-10 | 重庆邮电大学 | Compact type dual polarization micro base station antenna with high isolation |
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2017
- 2017-07-04 CN CN201710539439.5A patent/CN107394391B/en not_active Expired - Fee Related
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| US20090295670A1 (en) * | 2008-06-02 | 2009-12-03 | Wistron Neweb Corp. | Flat antenna and antenna device |
| CN102122760A (en) * | 2011-03-17 | 2011-07-13 | 东南大学 | Microstrip antenna for feed of printing L-shaped probe |
| CN102637957A (en) * | 2012-05-10 | 2012-08-15 | 东南大学 | Dual-probe reverse phase feeding microstrip antenna |
| US20160172763A1 (en) * | 2014-12-16 | 2016-06-16 | Laird Technologies, Inc. | Antenna systems with proximity coupled annular rectangular patches |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980346A (en) * | 2019-04-08 | 2019-07-05 | 东南大学 | A kind of high-isolation bimodulus ultra wide band mimo antenna |
| CN115986403A (en) * | 2023-03-20 | 2023-04-18 | 广东工业大学 | Low-profile high-isolation polarization diversity patch antenna and wireless communication equipment |
| CN115986403B (en) * | 2023-03-20 | 2023-06-06 | 广东工业大学 | Low-profile high-isolation polarization diversity patch antenna and wireless communication device |
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| CN107394391B (en) | 2020-08-04 |
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