CN204375942U - A kind of ultra broadband mimo antenna of difference dual-port - Google Patents
A kind of ultra broadband mimo antenna of difference dual-port Download PDFInfo
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- CN204375942U CN204375942U CN201520025430.9U CN201520025430U CN204375942U CN 204375942 U CN204375942 U CN 204375942U CN 201520025430 U CN201520025430 U CN 201520025430U CN 204375942 U CN204375942 U CN 204375942U
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Abstract
The utility model discloses a kind of ultra broadband mimo antenna of difference dual-port, comprise medium substrate, also comprise difference port A, B of being arranged on medium substrate front, and be arranged on the Metal ground at the medium substrate back side, Metal ground hollow space is wide gap, and described difference port A, B are mutually orthogonal.Mimo antenna of the present utility model, has isolation high, compact conformation, the advantage of bandwidth of operation ultra-wide, can meet miniaturization, low cost, easily and the integrated requirement of difference channel.
Description
Technical field
The utility model relates to difference ultra broadband MOMO antenna, particularly a kind of ultra broadband mimo antenna of difference dual-port.
Background technology
Along with the fast development of wireless communication technology, communication system is more and more stronger to the mobile communication quality requirement of two-forty, Large Copacity and high reliability, and applies traditional communication technology and be difficult to meet this demand.Multiple-input and multiple-output (multiple-input-multiple-output, MIMO) technology applies multiple dual-mode antenna in a communications system to transmit and receive signal, can effectively overcome multipath fading effect and improve power system capacity and reliability.In the design of mimo antenna, the critical problem of most critical is exactly how to make the degree of coupling between each antenna element of reduction.The main method be coupled between current reduction antenna element has: EBG floor panel structure, Decoupling network, floor joint, reflector element, floor branch and Neutralization line.Above decoupling method is only applicable in narrowband operation bandwidth, not be suitable for radio ultra wide band system, most of complex structural designs, and the isolation realized is generally at about 20dB.
Differential antennae refers to the antenna adopting differential feed form.At present, radio circuit adopts differential technique signal transmission usually, but antenna great majority are designed to one port devices, can not directly and difference channel integrated, usually need adopt Ba Lun differential signal is converted to single port signal then feed antenna.The use of Ba Lun can cause loss, and system effectiveness is reduced, and too increases the quantity of individual devices, is unfavorable for that system height is integrated and miniaturized.
Differential antennae changes the single port method for designing of traditional antenna, is dual-port form by Antenna Design, directly two ports of differential signal feed antenna.Differential antennae can directly and difference channel integrated, decrease the use of barron device part, improve system effectiveness.In all mimo antenna of current appearance, do not adopt differential feed form, namely do not have difference mimo antenna to occur.One be because can adopt the antenna form of differential feed not as single port antenna versatile and flexible, two be differential antennae processing test more more complicated than traditional single port antenna, need special instrument and equipment.But differential antennae is all obviously better than traditional antenna in performance He on engineer applied, therefore designs difference mimo antenna and have great importance and be worth.
Utility model content
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, provides a kind of ultra broadband mimo antenna of difference dual-port.
The purpose of this utility model is realized by following technical scheme:
A kind of ultra broadband mimo antenna of difference dual-port, comprise medium substrate, also comprise difference port A, B of being arranged on medium substrate front, and be arranged on the Metal ground at the medium substrate back side, Metal ground hollow space is wide gap, and described difference port A, B are mutually orthogonal.
Described difference port A comprises feed mouth A+ and A-, and described difference port B comprises feed mouth B+ and B-, and feed mouth A+ and A-is on straight line L1, and feed mouth B+ and B-is on straight line L2, and straight line L1, L2 are mutually vertical.
Described feed mouth A+, A-, B+, B-are paster.
Described wide gap is polygon M, and the correspondence position of polygon M in medium substrate front is polygon N, and difference port A, B are in polygon N.
Described polygon M is regular hexagon.
The course of work of the present utility model is as follows:
The utility model adopts planar design, on the two sides of one piece of medium substrate, etches the ground, wide gap that four pasters and a centre hollow out respectively, as depicted in figs. 1 and 2.Front is four rectangular patch a1 and a2, b1 and b2, forms difference port A and B respectively.Difference port A comprises two feed mouth A+ and A-, and feed-in amplitude is equal respectively, and the differential signal that phase place is contrary, difference port B is also like this.The back side of medium substrate is one piece of Metal ground 3, has cut out a polygon, form wide gap 4 in the middle of it.Polygonal wide gap has good gradually changeable, carries out feed, can produce multiple resonance frequency, form the working band of ultra-wide thus by the ground, wide gap of paster to the back side in front.Due to antenna full symmetric, when therefore difference port A works, it is 0 " virtual ground " that the middle being positioned at A+ and A-can form a voltage, and on the face at namely B+ and B-place, therefore B+ and B-does not have differential signal and export.Equally, when port B works, port A does not have differential signal yet and exports.Therefore, need not any decoupling structure, two difference port A and B can form high isolation, and are infinitely-great in theory.Because difference port A and B is mutually orthogonal, jointly feed is carried out to the wide gap at the back side, therefore when they work, mutually orthogonal dual polarization characteristic can be formed.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, compared with all ultra broadband mimo antenna occurred, the utility model does not adopt any decoupling arrangements, can reach the isolation of more than 50dB in the working band of ultra-wide.
2, compared with all ultra broadband mimo antenna occurred, the utility model adopt be differential feed structure, can better and difference channel integrated.
3, radiation is carried out in the shared wide gap of the utility model two pairs of differential feed ports, and achieve dual polarization characteristic, volume reduces greatly, simple and compact for structure, and cost is low.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of the ultra broadband mimo antenna of difference dual-port described in the utility model;
Fig. 2 is the structure schematic diagram of the ultra broadband mimo antenna of difference dual-port described in the utility model;
Fig. 3 is the strange mould reflection coefficient chart of Electromagnetic Simulation of the ultra broadband mimo antenna of difference dual-port described in the utility model;
Fig. 4 is the Electromagnetic Simulation degree of coupling curve chart of the ultra broadband mimo antenna of difference dual-port described in the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
As Fig. 1,2, a kind of ultra broadband mimo antenna of difference dual-port, comprises medium substrate, also comprise difference port A, B of being arranged on medium substrate front, and being arranged on the Metal ground at the medium substrate back side, Metal ground hollow space is wide gap, and described difference port A, B are mutually orthogonal;
Described difference port A comprises feed mouth A+ and A-, and described difference port B comprises feed mouth B+ and B-, and feed mouth A+ and A-is on straight line L1, and feed mouth B+ and B-is on straight line L2, and straight line L1, L2 are mutually vertical;
Described feed mouth A+, A-, B+, B-are respectively paster a1, b1, a2, b2;
Described wide gap is polygon M, and the correspondence position of polygon M in medium substrate front is polygon N, and difference port A, B are in polygon N;
Described polygon M is regular hexagon.
In the present embodiment, the dielectric constant of medium substrate is 4.4.The strange mould reflection coefficient curve of Electromagnetic Simulation as shown in Figure 3, antenna-10dB impedance bandwidth of operation is 2.9GHz to 11.3GHz, relative bandwidth reaches 118%, can cover UWB communication system (3.1GHz-10.6GHz) completely, is therefore applicable to very much being applied in radio ultra wide band system.
As shown in Figure 4, in whole ultra broadband working band, the degree of coupling between two difference ports is below-50dB, and namely isolation reaches more than 50dB, far away higher than the isolation of 20dB between common mimo antenna unit for the degree of coupling curve of Electromagnetic Simulation.This illustrates that two ports of antenna can independently work, and is not affected each other, and the signal of two port accepts can ensure the extremely low degree of correlation, thus provides reliable guarantee for the high signal quality in MIMO communication system.
Above-described embodiment is the utility model preferably execution mode; but execution mode of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection range of the present utility model.
Claims (5)
1. the ultra broadband mimo antenna of a difference dual-port, it is characterized in that: comprise medium substrate, also comprise difference port A, B of being arranged on medium substrate front, and be arranged on the Metal ground at the medium substrate back side, Metal ground hollow space is wide gap, and described difference port A, B are mutually orthogonal.
2. the ultra broadband mimo antenna of difference dual-port according to claim 1, it is characterized in that: described difference port A comprises feed mouth A+ and A-, described difference port B comprises feed mouth B+ and B-, feed mouth A+ and A-is on straight line L1, feed mouth B+ and B-is on straight line L2, and straight line L1, L2 are mutually vertical.
3. the ultra broadband mimo antenna of difference dual-port according to claim 2, is characterized in that: described feed mouth A+, A-, B+, B-are paster.
4. the ultra broadband mimo antenna of difference dual-port according to claim 1, is characterized in that: described wide gap is polygon M, and the correspondence position of polygon M in medium substrate front is polygon N, and difference port A, B are in polygon N.
5. the ultra broadband mimo antenna of difference dual-port according to claim 4, is characterized in that: described polygon M is regular hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520025430.9U CN204375942U (en) | 2015-01-14 | 2015-01-14 | A kind of ultra broadband mimo antenna of difference dual-port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520025430.9U CN204375942U (en) | 2015-01-14 | 2015-01-14 | A kind of ultra broadband mimo antenna of difference dual-port |
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| CN204375942U true CN204375942U (en) | 2015-06-03 |
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| CN201520025430.9U Expired - Fee Related CN204375942U (en) | 2015-01-14 | 2015-01-14 | A kind of ultra broadband mimo antenna of difference dual-port |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577318A (en) * | 2015-01-14 | 2015-04-29 | 华南理工大学 | Difference dual-port ultra wideband MIMO antenna |
| CN104993242A (en) * | 2015-06-18 | 2015-10-21 | 华南理工大学 | High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna |
| CN105305052A (en) * | 2015-11-10 | 2016-02-03 | 华南理工大学 | High rectangle factor trap UWB (ultra wide band) slot antenna based on differential step feed |
| WO2020024660A1 (en) * | 2018-08-03 | 2020-02-06 | 瑞声声学科技(深圳)有限公司 | Large-scale mimo antenna array |
| CN110828973A (en) * | 2019-11-05 | 2020-02-21 | 清华大学 | Broadband 5G mobile terminal antenna separated from frame and having low profile |
-
2015
- 2015-01-14 CN CN201520025430.9U patent/CN204375942U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577318A (en) * | 2015-01-14 | 2015-04-29 | 华南理工大学 | Difference dual-port ultra wideband MIMO antenna |
| CN104993242A (en) * | 2015-06-18 | 2015-10-21 | 华南理工大学 | High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna |
| CN105305052A (en) * | 2015-11-10 | 2016-02-03 | 华南理工大学 | High rectangle factor trap UWB (ultra wide band) slot antenna based on differential step feed |
| CN105305052B (en) * | 2015-11-10 | 2018-07-10 | 华南理工大学 | The high rectangle degree trap ultra wide band slot antenna of difference ladder feed |
| WO2020024660A1 (en) * | 2018-08-03 | 2020-02-06 | 瑞声声学科技(深圳)有限公司 | Large-scale mimo antenna array |
| CN110828973A (en) * | 2019-11-05 | 2020-02-21 | 清华大学 | Broadband 5G mobile terminal antenna separated from frame and having low profile |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20180114 |