CN106450755B - Gap array loads 4 unit multifrequency high-isolation micro-strip mimo antennas - Google Patents
Gap array loads 4 unit multifrequency high-isolation micro-strip mimo antennas Download PDFInfo
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- CN106450755B CN106450755B CN201611025001.7A CN201611025001A CN106450755B CN 106450755 B CN106450755 B CN 106450755B CN 201611025001 A CN201611025001 A CN 201611025001A CN 106450755 B CN106450755 B CN 106450755B
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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
- H01Q1/52—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
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- 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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0037—Particular feeding systems linear waveguide fed arrays
- H01Q21/0043—Slotted waveguides
- H01Q21/005—Slotted waveguides arrays
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention provides a kind of gap arrays to load 4 unit multifrequency high-isolation micro-strip mimo antennas, it is related to antenna research field in passive device, there is four element antenna units of the invention T-type to feed coupling line port, polarity diversity is realized using gap array is periodically loaded in radiation patch, to improve isolation between antennas, four unit mimo antenna systems, not only inhibit the coupling between antenna, and motivate more resonance frequency points, the directional diagram of higher mode is improved, and the size of antenna has also obtained very big decrement；Couple feed line and and radiating element be all made of microstrip line, keep antenna section lower, and easy to process；The antenna of design has multiple frequency point frequency working characteristics, has stable polarity diversity characteristic, and medium substrate is cheap, is easy to buy, in short, low manufacture cost of the present invention, easy to process, can be mass, and has biggish practical application value.
Description
Technical field
The present invention relates to antenna research field in passive device, the planar microstrip mimo antenna of especially a kind of WLAN.
Background technique
With the continuous development of wireless communication technique and application, universal, 5G communication the arrival of 4G communication and Internet of Things
It proposes, all to the message transmission rate of wireless communication system and channel capacity, more stringent requirements are proposed.Then, early in 1908
Multiple-input and multiple-output (Multiple Input and Multiple Output, the MIMO) channel radio just proposed by Marconi
Letter system just causes the concern of people again, and mimo wireless communication system is without additional system bandwidth and the transmission power of increasing
Under the conditions of, the reliability of radio channel capacity and data transmission can be greatlyd improve, then starts to be widely studied, and
It is applied through the base station in mobile communication.But with the increase of number of antennas, especially in a limited space,
The distance between element antenna can become smaller and smaller, when the distance between two antennas are less than half of carrier wavelength, antenna
The characteristic of unit will receive it is serious influence each other, the mutual coupling between element antenna can become highly significant, relative coefficient
Become larger, produces serious influence to the message capacity raising of entire MIMO communication system.Then reduce day in mimo antenna system
Coupling between line unit is the key that the hot spot that mimo antenna design is also research.
Domestic and foreign scholars are made that many researchs to mimo antenna, such as: Y.Gao et al. devises a centre frequency work
Make to be applied to WLAN in 5.2GHz, the two unit mimo antenna systems with minimum floor, by amendment, by two antennas it
Between the degree of coupling drop to -28dB or less；Shuai Zhang et al. proposes a kind of uncoupling technology for PIFA antenna, utilizes one
Kind T-type impedance of slot converter, the degree of coupling between single-frequency and the mimo antenna of two-frequency operation can effectively be dropped
It is low.But above antenna all has the shortcomings that antenna volume is larger, is unfavorable for the demand of current device miniaturization, in addition, day
The isolation of line unit is relatively low, and interference is larger, does not have polarity diversity characteristic.Therefore how to design with diversity performance
Miniaturization high-isolation mimo antenna just at we study direction.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention is directed to design to be suitable for mobile phone end with polarity diversity characteristic
The high-isolation mimo antenna at end, has characteristics that electric size is small, and isolation is high, has the function of polarity diversity and convenient for collection
At processing.
Mimo antenna designed by the present invention is made of six parts: No. 1 antenna element, No. 2 antenna elements, No. 3 antenna lists
Member, No. 4 antenna elements, medium substrate 5 and earth plate.
- No. 4 antenna elements of No. 1 antenna element are by 50 ohm of port feed coupling lines of a T-type and a length of Lpatch、
Width is WpatchRectangular radiation patch composition, LpatchValue range be 33.5mm~36.5mm, WpatchValue range be
20mm~22mm, the coupling unit of 50 ohm of port feed coupling lines of T-type is having a size of Lport×Wport, LportValue range be
2.88mm~3.08mm, WportValue range be 1.92mm~2.08mm, the feed line of 50 ohm of ports of T-type feed coupling line
Having a size of Lfeed×Wfeed, LfeedValue range be 9.60mm~10.40mm, WfeedValue range be 1.09mm~
The feed line of 1.11mm, 50 ohm of port feed coupling lines of T-type are each perpendicular to the long side L of rectangular radiation patchpatch, and, T-type 50
Long side L of the feed line end of ohm port feed coupling line apart from rectangular radiation patchpatchDistance be w, the value range of w is
1.9mm~2.1mm, there are several equidistant parallel gaps, gap directions to be in any side of rectangular radiation patch for rectangular radiation patch
45 ° of ± 2 ° of oblique angles, rectangular radiation patch and equidistant parallel gap are d in the width of vertical direction, and the value range of d is
1.35mm~1.47mm, four rectangular radiations of No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and No. 4 antenna elements
Patch in matrix pattern be distributed, and No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and No. 4 antenna elements four rectangles
The distance between cross gap among radiation patch is g, value range 0.08mm~1.02mm of g.
- No. 4 antenna elements of No. 1 antenna element are printed on a length of Lsub, width WsubRectangular Enclosure with Participating Media substrate 5 on, LsubTake
Value range is 100mm~110mm, WsubValue range be 66mm~70mm, Rectangular Enclosure with Participating Media substrate 5 use relative dielectric constant
For 4.4 polytetrafluoroethylene material, the loss angle tangent of Rectangular Enclosure with Participating Media substrate 5 is 0.02, with a thickness of Hsub, HsubValue range
For 1.52mm~1.68mm.
Earth plate is attached to the underface of Rectangular Enclosure with Participating Media substrate 5, and wherein the one side of 5 printed microstrip antennas of Rectangular Enclosure with Participating Media substrate is
Top, in addition one side is lower section, and the size of earth plate is identical as the size of Rectangular Enclosure with Participating Media substrate 5.
Present invention has the advantages that antenna element has T-type feed coupling due to four unit mimo antenna systems of design
Line end mouth realizes polarity diversity using gap array is periodically loaded in radiation patch, to improve having for isolation between antennas
Effect measure, and four unit mimo antenna systems are devised, the coupling between antenna is not only inhibited, and motivate more
Resonance frequency point improves the directional diagram of higher mode, and the size of antenna has also obtained very big decrement, mobile eventually in mobile phone etc.
In the application at end, small size can greatly reduce occupied space；Couple feed line and and radiating element be all made of microstrip line,
Keep antenna section lower, and easy to process；The antenna of design has multiple frequency point frequency working characteristics, has stable polarity diversity
Characteristic, medium substrate use dielectric constant for 4.4 FR4 material, it is cheap, be easy to buy.In short, cost of manufacture of the present invention
It is low, it is easy to process, it can be mass, there is biggish practical application value.
Detailed description of the invention
Fig. 1 is the top view of 4 unit mimo antennas of the invention.
Fig. 2 is the scattering parameter of inventive antenna with frequency variation curve figure.
Fig. 3 (a) is antenna pattern of the mimo antenna in 2.4GHz, and Fig. 3 (b) is mimo antenna in the radiation side of 3.4GHz
Xiang Tu, Fig. 3 (c) are antenna pattern of the mimo antenna in 5.4GHz.
Wherein: 1-1 antenna element, 2-2 antenna element, 3-3 antenna element, 4-4 antenna element, 5- polytetrafluoro
Ethylene medium substrate, Port1- feed port 1, Port2- feed port 2, Port3- feed port 3, Port4- feed port 4,
LsubThe length of Rectangular Enclosure with Participating Media substrate, WsubThe width of Rectangular Enclosure with Participating Media substrate, HsubThe height of Rectangular Enclosure with Participating Media substrate, g- any two
The distance between adjacent radiation patch, LpatchThe length of rectangular radiation patch, WpatchThe width of rectangular radiation patch, LportAntenna
Unit feeds coupling line port feed section length, WportAntenna element feeds coupling line port feed section width, LfeedIt
Line unit feeds coupling line coupling unit length, WfeedAntenna element feed coupling line coupling unit width, w- crack range with
Radiation patch Edge Distance, the distance between d- adjacent slits.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Mimo antenna designed by the present invention is made of six parts :-No. 4 antenna elements of No. 1 antenna element, medium substrate 5
And earth plate, as shown in Figure 1, specific parameters of structural dimension is as shown in table 1, Parameter units are mm in table 1.
Table 1
| Variable | Numerical value | Variable | Numerical value |
| Lsub | 105.00±5.00 | Wsub | 68.00±2.00 |
| Hsub | 1.60±0.08 | g | 1.00±0.02 |
| Lpatch | 35.00±1.50 | Wpatch | 21.00±1.00 |
| Lport | 2.98±0.10 | Wport | 2.00±0.08 |
| Lfeed | 10.00±0.40 | Wfeed | 1.10±0.05 |
| w | 2.00±0.10 | d | 1.41±0.06 |
Letter in table 1 represents the geometric dimension parameter in figure, there is corresponding mark in Fig. 1.
LsubThe length of Rectangular Enclosure with Participating Media substrate, WsubThe width of Rectangular Enclosure with Participating Media substrate, HsubThe height of Rectangular Enclosure with Participating Media substrate,
The distance of each radiation patch of g-, LpatchThe length of rectangular radiation patch, WpatchThe width of rectangular radiation patch, LportAntenna element
Feed coupling line port feed section length, WportAntenna element feeds coupling line port feed section width, LfeedAntenna list
Member feed coupling line coupling unit length, WfeedAntenna element feed coupling line coupling unit width, w- crack range and radiation
Patch edges distance, the distance between d- adjacent slits, Port1- feed port 1, Port2- feed port 2, Port3- feed
Port 3, Port4- feed port 4.
Specific implementation method are as follows:-No. 4 antenna elements of No. 1 antenna element are by the 50 ohm of port feed couplings of a T-type
Line and a length of Lpatch, width WpatchRectangular radiation patch composition, LpatchValue range be 33.5mm~36.5mm, Wpatch
Value range be 20mm~22mm, the coupling unit of 50 ohm of ports of T-type feed coupling line is having a size of Lport×Wport, Lport
Value range be 2.88mm~3.08mm, WportValue range be 1.92mm~2.08mm, 50 ohm of ports of T-type feed couplings
The feed line of zygonema is having a size of Lfeed×Wfeed, LfeedValue range be 9.60mm~10.40mm, WfeedValue range be
The feed line of 1.09mm~1.11mm, 50 ohm of port feed coupling lines of T-type are each perpendicular to the long side L of rectangular radiation patchpatch,
And long side L of the feed line end of 50 ohm of port feed coupling lines of T-type apart from rectangular radiation patchpatchDistance be w, w's takes
Value range is 1.9mm~2.1mm, and there are several equidistant parallel gaps, gap direction and rectangular radiation patch for rectangular radiation patch
Any side is d, the value model of d in the width of vertical direction in 45 ° of ± 2 ° of oblique angles, rectangular radiation patch and equidistant parallel gap
It encloses for 1.35mm~1.47mm, in the present embodiment, equidistant parallel gap inclined direction as shown in Figure 1, i.e. upper left corner rectangle spoke
It penetrates the gap inclined direction of patch and lower right corner rectangular radiation patch and the lower side length of rectangular radiation patch and the left side is long in equilateral
The gap inclined direction of triangle, upper right corner radiation patch and lower left corner radiation patch and the lower side length of rectangular radiation patch and the right side
Side length is in equilateral triangle, No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and No. 4 antenna elements four rectangle spokes
Penetrate patch in matrix pattern be distributed, and No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and No. 4 antenna elements four squares
The distance between cross gap among shape radiation patch is g, value range 0.08mm~1.02mm of g；
- No. 4 antenna elements of No. 1 antenna element are printed on a length of Lsub, width WsubRectangular Enclosure with Participating Media substrate 5 on, LsubTake
Value range is 100mm~110mm, WsubValue range be 66mm~70mm, Rectangular Enclosure with Participating Media substrate 5 use relative dielectric constant
For 4.4 polytetrafluoroethylene material, the loss angle tangent of Rectangular Enclosure with Participating Media substrate 5 is 0.02, with a thickness of Hsub, HsubValue range
For 1.52mm~1.68mm, polytetrafluoroethylene material characteristic mechanical performance with higher and dielectric properties, preferable insulating properties
Energy, heat resistance and moisture resistivity, Bing have good machining property, easy to process, lower production costs.
Earth plate is attached to the underface of Rectangular Enclosure with Participating Media substrate 5, and wherein the one side of 5 printed microstrip antennas of Rectangular Enclosure with Participating Media substrate is
Top, in addition one side is lower section, and the size of earth plate is identical as the size of Rectangular Enclosure with Participating Media substrate 5.
Simulation optimization is carried out to antenna model with electromagnetic simulation software HFSS, dimensional parameters is determined, obtains the scattering of antenna
Parameter Map, Fig. 2 is antenna scattering parameter with frequency variation curve figure in attached drawing, and as seen from the figure, which exists respectively
Resonance on 2.4GHz, 3.4GHz, 5.4GHz frequency point, Fig. 3 (a) are antenna pattern of the mimo antenna in 2.4GHz, and Fig. 3 (b) is
For mimo antenna in the antenna pattern of 3.4GHz, Fig. 3 (c) is antenna pattern of the mimo antenna in 5.4GHz.As can be seen that this
The mimo antenna of invention design has the characteristic of polarity diversity and high-isolation, and this antenna has the spy of multi-resonant frequency point
Property, to verify exploitativeness of the invention.
Claims (1)
1. a kind of gap array loads 4 unit multifrequency high-isolation micro-strip mimo antennas, including No. 1 antenna element, No. 2 antenna lists
Member, No. 3 antenna elements, No. 4 antenna elements, medium substrate (5) and earth plate, it is characterised in that:
- No. 4 antenna elements of No. 1 antenna element are by 50 ohm of port feed coupling lines of a T-type and a length of Lpatch, width be
WpatchRectangular radiation patch composition, LpatchValue range be 33.5mm~36.5mm, WpatchValue range be 20mm~
22mm, the coupling unit of 50 ohm of port feed coupling lines of T-type is having a size of Lport×Wport, LportValue range be 2.88mm
~3.08mm, WportValue range be 1.92mm~2.08mm, the feed line of 50 ohm of ports of T-type feed coupling line having a size of
Lfeed×Wfeed, LfeedValue range be 9.60mm~10.40mm, WfeedValue range be 1.09mm~1.11mm, T-type
The feed line of 50 ohm of port feed coupling lines is each perpendicular to the long side L of rectangular radiation patchpatch, and, 50 ohm of port feedbacks of T-type
Long side L of the feed line end of thermocouple zygonema apart from rectangular radiation patchpatchDistance be w, the value range of w be 1.9mm~
2.1mm, there are several equidistant parallel gaps for rectangular radiation patch, and gap direction and any side of rectangular radiation patch are in 45 ° ± 2 °
Under the gap inclined direction and rectangular radiation patch at oblique angle, i.e. upper left corner rectangular radiation patch and lower right corner rectangular radiation patch
Side length and left side length are in equilateral triangle, the gap inclined direction and rectangle spoke of upper right corner radiation patch and lower left corner radiation patch
Lower side length and the right length for penetrating patch are in equilateral triangle, the width of rectangular radiation patch and equidistant parallel gap in vertical direction
It is d, the value range of d is 1.35mm~1.47mm, No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and No. 4 days
Four rectangular radiation patch of line unit are distributed in matrix pattern, and No. 1 antenna element, No. 2 antenna elements, No. 3 antenna elements and 4
The distance between cross gap among four rectangular radiation patch of number antenna element is g, the value range 0.08mm of g
~1.02mm；
- No. 4 antenna elements of No. 1 antenna element are printed on a length of Lsub, width WsubRectangular Enclosure with Participating Media substrate (5) on, LsubValue
Range is 100mm~110mm, WsubValue range be 66mm~70mm, Rectangular Enclosure with Participating Media substrate (5) use relative dielectric constant
For 4.4 polytetrafluoroethylene material, the loss angle tangent of Rectangular Enclosure with Participating Media substrate (5) is 0.02, with a thickness of Hsub, HsubValue model
It encloses for 1.52mm~1.68mm；
Earth plate is attached to the underface of Rectangular Enclosure with Participating Media substrate (5), and wherein the one side of Rectangular Enclosure with Participating Media substrate (5) printed microstrip antennas is
Top, in addition one side is lower section, and the size of earth plate is identical as the size of Rectangular Enclosure with Participating Media substrate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025001.7A CN106450755B (en) | 2016-11-22 | 2016-11-22 | Gap array loads 4 unit multifrequency high-isolation micro-strip mimo antennas |
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| CN201611025001.7A CN106450755B (en) | 2016-11-22 | 2016-11-22 | Gap array loads 4 unit multifrequency high-isolation micro-strip mimo antennas |
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| CN106450755A CN106450755A (en) | 2017-02-22 |
| CN106450755B true CN106450755B (en) | 2019-04-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634338B (en) * | 2017-09-12 | 2021-08-10 | 惠州Tcl移动通信有限公司 | Dual-frequency WIFI antenna and mobile terminal |
| CN108963432A (en) * | 2018-08-28 | 2018-12-07 | 昆山睿翔讯通通信技术有限公司 | A kind of eight unit mimo antenna system of communication terminal |
| CN110970719A (en) * | 2018-09-28 | 2020-04-07 | 中兴通讯股份有限公司 | Microstrip MIMO antenna structure and mobile terminal thereof |
| CN113690596A (en) * | 2021-07-30 | 2021-11-23 | 昆山睿翔讯通通信技术有限公司 | Broadband MIMO antenna assembly and mobile terminal |
| CN114927863B (en) * | 2022-05-07 | 2023-04-28 | 西安电子科技大学 | Multiport microstrip patch antenna unit with high isolation and phased array |
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| JP2004120760A (en) * | 2002-09-25 | 2004-04-15 | Andrew Corp | Dual polarization antenna |
| KR100951582B1 (en) * | 2007-11-02 | 2010-04-09 | 한양대학교 산학협력단 | Ultra Wide Band Diversity Antenna |
| US8803742B2 (en) * | 2012-03-12 | 2014-08-12 | King Fahd University Of Petroleum And Minerals | Dual-band MIMO antenna system |
| CN104993233A (en) * | 2015-07-17 | 2015-10-21 | 中国科学院上海高等研究院 | A high-isolation micro-strip patch MIMO antenna having the characteristic of radiation mode diversity |
| CN106058466A (en) * | 2016-06-02 | 2016-10-26 | 北京航空航天大学 | Reconfigurable electromagnetic band gap structure partitioned by diagonal lines and wound by V-shaped folding lines |
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2016
- 2016-11-22 CN CN201611025001.7A patent/CN106450755B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120760A (en) * | 2002-09-25 | 2004-04-15 | Andrew Corp | Dual polarization antenna |
| KR100951582B1 (en) * | 2007-11-02 | 2010-04-09 | 한양대학교 산학협력단 | Ultra Wide Band Diversity Antenna |
| US8803742B2 (en) * | 2012-03-12 | 2014-08-12 | King Fahd University Of Petroleum And Minerals | Dual-band MIMO antenna system |
| CN104993233A (en) * | 2015-07-17 | 2015-10-21 | 中国科学院上海高等研究院 | A high-isolation micro-strip patch MIMO antenna having the characteristic of radiation mode diversity |
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