CN110034397A - A kind of MIMO handset antenna radiation unit and MIMO antenna for mobile phone - Google Patents
A kind of MIMO handset antenna radiation unit and MIMO antenna for mobile phone Download PDFInfo
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- CN110034397A CN110034397A CN201910335814.3A CN201910335814A CN110034397A CN 110034397 A CN110034397 A CN 110034397A CN 201910335814 A CN201910335814 A CN 201910335814A CN 110034397 A CN110034397 A CN 110034397A
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- minor matters
- radiation
- mimo
- medium substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
- Support Of Aerials (AREA)
Abstract
The invention discloses a kind of MIMO handset antenna radiation unit and MIMO antenna for mobile phone, which includes first group of radiation minor matters (11) positioned at medium substrate (2) one side and second group of radiation minor matters (12) positioned at medium substrate (2) another side；The projection of first group of radiation minor matters (11) and second group of radiation minor matters (12) is staggered.The radiating element is provided with multiple radiation minor matters, by intercoupling for radiation minor matters, successfully covers ultra-wide band, is able to satisfy the needs of 5G epoch a variety of communication standards.MIMO antenna for mobile phone provided in an embodiment of the present invention passes through addition " slot of T shape ", being somebody's turn to do " slot of T shape " is defect ground structure, additional couple current path is provided for electromagnetic wave, the original couple current from excitation port to non-actuated port can be weakened, and then the isolation between antenna radiation unit is promoted, reduce reciprocal influence between each radiating element.
Description
Technical field
The present invention relates to fields of communication technology, more particularly, to a kind of MIMO handset antenna radiation unit and MIMO mobile phone day
Line.
Background technique
In past 40 years, wireless communication technique experienced four main technological changes at an amazing speed.Herein
Period, a variety of communications bands are by artificial regulation and division, such as LTE700 (698-787MHz), GSM850 (824-
894MHz), GSM900 (880-960MHz), GSM1800 (1710-1880MHz), GSM1900 (1850-1990MHz), UMTS
(1920-2170MHz), LTE2300 (2300-2400MHz), LTE2500 (2500-2690MHz) etc..Increasingly with the 5G epoch
Closely, mobile communication may also need to cover 5G frequency range in the near future, such as LTE42/43/46 (3400-3800MHz, 5150-
5925MHz), different frequency ranges corresponds to different purposes and function.It is a variety of in predictable following a very long time
Communication protocol standard needs coexist, and current communication be unable to do without 2G network, and the application of internet then be unable to do without 3G, 4G communication frequency
The support of section.In the 5G epoch to arrive soon, mobile phone needs to cover as a kind of extremely extensive mobile terminal of application range
The frequency range of lid ultra-wide meets the needs of various communications protocols.So how to design more broadbands in extremely limited space
(especially low-frequency range) becomes vast researcher urgent problem to be solved to meet the antenna of all communication requirements.
Summary of the invention
(1) goal of the invention
The object of the present invention is to provide a kind of handset antenna radiation unit and mobile phone radiation antenna, which is provided with
Multiple radiation minor matters successfully cover ultra-wide band by intercoupling between each minor matters, meet the need of a variety of communication standards
It asks.In addition, antenna provided in an embodiment of the present invention, provides volume by addition " slot of T shape " on medium substrate for electromagnetic wave
Outer couple current path can weaken the original couple current from excitation port to non-actuated port in this way, and then promote day
The requirement of the isolation of beta radiation unit reduces reciprocal influence between each radiating element.
(2) technical solution
To solve the above problems, of the invention is to provide a kind of MIMO handset antenna radiation unit, including it is located at medium base
First group of radiation minor matters of plate one side and second group of radiation minor matters positioned at medium substrate another side；First group of radiation minor matters
It is staggered with second group of radiation minor matters in the projection of the medium substrate.
Further, first group of radiation minor matters include the first radiation minor matters interconnected and the second radiation minor matters；
Second group of radiation minor matters include third radiation minor matters interconnected and the 4th radiation minor matters；The 4th radiation minor matters are remote
Projection of the one end on the medium substrate from third radiation minor matters is formed as bathtub construction, and the second radiation minor matters are separate
One end of the first radiation minor matters is plugged in the bathtub construction in the projection on the medium substrate；The third radiation
The one end of minor matters far from the 4th radiation minor matters is in the projection of the medium substrate and the first radiation minor matters far from described second
Radiate projection fitting of the one end of minor matters on the medium substrate.
Further, the first radiation minor matters include the first minor matters, the second minor matters, third minor matters, the 4th minor matters and the
Five minor matters；One end of second minor matters is connect with one end of first minor matters and second minor matters and first minor matters are hung down
Directly；The third minor matters are vertical with first minor matters, and the third minor matters are parallel with second minor matters and are located at described the
One minor matters are ipsilateral, are equipped with the first pre-determined distance with second minor matters；One end of 5th minor matters and second minor matters
Other end connection, the 5th minor matters are vertical with second minor matters；5th minor matters and the first minor matters are located at described second
Ipsilateral, projection of side of second minor matters far from the 5th minor matters and the first minor matters on the medium substrate of minor matters
It is bonded with third radiation minor matters far from one end of the 4th radiation minor matters；One end of 4th minor matters and the 5th minor matters connects
It connects, the 4th minor matters and the second minor matters are located at the two sides of the 5th minor matters；The third minor matters are provided with the 5th minor matters
Second pre-determined distance.
Further, third radiation minor matters include the 6th minor matters and the 7th minor matters；One end of 6th minor matters and the first radiation
Minor matters connection；The other end of 6th minor matters is connect with one end of the 7th minor matters, the 6th minor matters and the 7th minor matters
Vertically；The other end of 7th minor matters is plugged in the bathtub construction in the projection on the medium substrate.
Further, the 4th radiation minor matters include the 8th minor matters, the 9th minor matters and the tenth minor matters；Tenth minor matters
One end and third radiation minor matters connect, it is vertical that the tenth minor matters with the third radiate minor matters；The one of 8th minor matters
End is connect with the middle part of the tenth minor matters, and the 8th minor matters are vertical with the tenth minor matters；8th minor matters with it is described
Third radiation branch section is ipsilateral in the tenth minor matters；It is pre- that 8th minor matters and the third radiation minor matters are provided with third
If distance；The other end of 8th minor matters is connect with one end of the 9th minor matters, the 8th minor matters with described 9th
Section is vertical；9th minor matters and third radiation minor matters are located at the two sides of the 8th minor matters；8th minor matters
Length be less than the third radiation minor matters length；The other end of 8th minor matters is the at a distance from the tenth minor matters
Four pre-determined distances.
Further, the first minor matters length is 9-10.4mm, and the second minor matters length is 2-3mm, third minor matters length
For 1-2mm, first pre-determined distance is 6.5-7.5mm.
Further, the width of the 4th minor matters is 1.5mm, and the length of the 5th minor matters is 14mm.
Further, the length of the 6th minor matters is 7.5-8.5mm, and the 7th minor matters length is 5.5-6.5mm.
Further, the length of third radiation minor matters is 11-13mm；The third radiation minor matters are on the medium substrate
Projection and the length of the contact projection of the first group of radiation minor matters on the medium substrate be 4.5-6mm, the third
Pre-determined distance is 3.5-4.5mm；The 9th minor matters length is 11.5-13mm.
Further, the 4th pre-determined distance is 1.5-2.5mm.
According to another aspect of the present invention, a kind of MIMO antenna for mobile phone is additionally provided, including at least two first aspect provides
Radiating element and fitting setting the medium substrate and bottom plate；The medium substrate is rectangular configuration, 2 radiation
Unit is respectively arranged at adjacent two vertex of medium substrate；The bottom plate, is rectangular configuration, and the area of bottom plate is less than base
The area of plate, to avoid the radiating element is blocked；It is provided on the bottom plate, and between 2 radiating elements
For increasing the slot of isolation between antennas.
Further, radiating element is 4；4 radiating elements are respectively arranged at 4 apex angles of the medium substrate
Place；The number of the slot is 2, and 2 slots are oppositely arranged.
Further, slot includes the first slot and the second slot of vertical connection；One end of first slot is connected to the edge of bottom plate,
The other end is connected to the second slot；And first the central axis of slot be overlapped with the central axis of the bottom plate.
Further, medium substrate is made of FR4 material.
(3) beneficial effect
Above-mentioned technical proposal of the invention has following beneficial technical effect:
(1) radiating element provided in an embodiment of the present invention is provided with multiple radiation minor matters, by the phase mutual coupling for radiating minor matters
It closes, successfully covers ultra-wide band, be able to satisfy the needs of current 5G epoch a variety of communication standards.
(2) radiating element provided in an embodiment of the present invention, occupied space very little compared with the prior art is with strong applicability,
Ultra-thin mobile phone can be preferably suitable for.
(3) MIMO antenna for mobile phone provided in an embodiment of the present invention, is provided with multiple radiating elements, passes through the short side in bottom plate
On, the slot for increasing isolation between antennas is set, the coupling between multiple radiating elements can be reduced, is reduced between radiating element
Influence each other, increase isolation, to improve the working performance of mimo antenna.
(4) according to the characteristic of mimo antenna, multiple radiating elements, which work at the same time, can increase considerably transmission rate, meet
The needs of high rate data transmission data.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the MIMO handset antenna radiation unit that first embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram of MIMO antenna for mobile phone of second embodiment according to the present invention；
Fig. 3 schematically shows the return loss schematic diagram of the antenna for mobile phone of second embodiment；
Fig. 4 is schematically shown with the transmission coefficient schematic diagram in antenna for mobile phone, between four ports.
Fig. 5 (a) schematically shows spoke two-dimensional radiation of the radiating element of first embodiment provider in 2500MHz
Directional diagram；
Fig. 5 (b) schematically shows spoke two-dimensional radiation of the radiating element of first embodiment provider in 3500MHz
Directional diagram；
Fig. 5 (c) schematically shows spoke two-dimensional radiation of the radiating element of first embodiment provider in 5750MHz
Directional diagram；
Fig. 6 is the antenna radiation efficiency and gain simulation result schematic diagram that second embodiment provides；
ECC simulation result schematic diagram between each port of antenna that Fig. 7 provides for second embodiment.
Attached body label
1:MIMO handset antenna radiation unit；
11: the first groups of radiation minor matters；111: the first radiation minor matters；1111: the first minor matters；1112: the second minor matters；1113:
Third minor matters；1114: the four minor matters；1115: the five minor matters；112: the second radiation minor matters；1121: the seven minor matters；1122: the six
Minor matters；12: the second groups of radiation minor matters；121: third radiates minor matters；122: the four radiation minor matters；1221: the eight minor matters；1222:
9th minor matters；1223: the ten minor matters；
2: medium substrate；
3: bottom plate；31: slot；311: the first slots；312: the second slots.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Before the antenna for mobile phone that the present invention will be described in detail embodiment provides, evaluation antenna for mobile phone quality is first explained
Index.
The index of MIMO antenna for mobile phone mainly include the following types:
1, occupied space.Usually, it is limited to the extremely narrow space of mobile phone, in the case where satisfying the use demand,
Space occupied by antenna is the smaller the better.
2, frequency range is covered.For antenna, it is most important that its return loss meets requirement in required frequency range, and one
As standard be -6dB or -10dB.
3, isolation.According to the technical principle of mimo antenna, the information transmitted between each port be preferably it is independent without
It is influenced by other ports.That is, the isolation between each port should be the bigger the better, the phase between port can be made in this way
It mutually influences to be preferably minimized, reduces the correlation between transmitted signal, improve efficiency of transmission so that reaching the phase of transmission high-speed
It hopes.
Fig. 1 is the structural schematic diagram for the MIMO handset antenna radiation unit that embodiment of the present invention provides.
As shown in Figure 1, the MIMO handset antenna radiation unit 1, first group of radiation branch including being located at 2 one side of medium substrate
Section 11 and positioned at 2 another side of medium substrate second group of radiation minor matters 12；First group of radiation minor matters 11 and second group of radiation
Minor matters 12 are staggered in the projection of the medium substrate 2.
Specifically, first group of radiation minor matters 11 include the first radiation minor matters 111 and the second radiation branch interconnected
Section 112；Second group of radiation minor matters 12 includes third interconnected radiation minor matters 121 and the 4th radiation minor matters 122；4th radiation
Minor matters 122 are formed as bathtub construction far from projection of the one end on the medium substrate 2 of third radiation minor matters 121, and described the
Projection of the one end of two radiation minor matters 112 far from the first radiation minor matters 111 on the medium substrate 2 is plugged on the slot
In shape structure；The one end of third radiation minor matters 121 far from the 4th radiation minor matters 122 the medium substrate 2 projection with
Projection fitting of the one end of the first radiation minor matters 111 far from the second radiation minor matters 112 on the medium substrate 2.
In a specific embodiment, the first radiation minor matters 111 include the first minor matters 1111, the second minor matters 1112, the
Three minor matters 1113, the 4th minor matters 1114 and the 5th minor matters 1115；One end of second minor matters 1112 and first minor matters 1111
One end connects and second minor matters 1112 and first minor matters 1111 are vertical；The third minor matters 1113 with described first
Section 1111 is vertical, and the third minor matters 1113 are parallel with second minor matters 1112 and ipsilateral positioned at first minor matters 1111,
The first pre-determined distance is equipped with second minor matters 1112；One end of 5th minor matters 1115 and second minor matters 1112
Other end connection, the 5th minor matters 1115 are vertical with second minor matters 1112；5th minor matters 1115 and the first minor matters
1111 are located at the ipsilateral of second minor matters 1112, and second minor matters 1112 are far from the 5th minor matters 1115 and the first minor matters
Projection of 1111 side on the medium substrate 2 radiates the one of minor matters 122 far from the 4th with third radiation minor matters 121
End fitting；4th minor matters 1114 are connect with one end of the 5th minor matters 1115, the 4th minor matters 1114 and the second minor matters
1112 are located at the two sides of the 5th minor matters 1115；Third minor matters 1113 and the 5th minor matters 1115 be provided with second it is default away from
From.
Optionally, the first pre-determined distance is 6.5-7.5mm, preferably 7mm.
Optionally, the second pre-determined distance is 0.5-1.5mm, preferably 1mm.
In one embodiment, the third radiation minor matters 121 include the 6th minor matters 1122 and the 7th minor matters 1121；It is described
One end of 6th minor matters 1122 is connect with the 5th minor matters 1115 in the first radiation minor matters 111.6th minor matters 1122 it is another
One end is connect with one end of the 7th minor matters 1121, and the 6th minor matters 1122 are vertical with the 7th minor matters 1121；It is described
Projection of the other end of 7th minor matters 1121 on the medium substrate 2 is plugged in the bathtub construction.Wherein, the 7th minor matters
1121 are arranged in parallel with the first minor matters 1111, and the 6th minor matters 1122 are parallel with the second minor matters 1112 and are located at the 5th minor matters 1115
It is ipsilateral.
Further, the 4th radiation minor matters 122 include the 8th minor matters 1221, the 9th minor matters 1222 and the tenth minor matters
1223；One end of tenth minor matters 1223 is connect with third radiation minor matters 121, the tenth minor matters 1223 and the third spoke
Shoot section 121 is vertical；One end of 8th minor matters 1221 is connect with the middle part of the tenth minor matters 1223, the 8th minor matters 1221
It is vertical with the tenth minor matters 1223；8th minor matters 1221 are located at the tenth minor matters with third radiation minor matters 121
1223 it is ipsilateral；8th minor matters 1221 are provided with third pre-determined distance with third radiation minor matters 121.
Optionally, third pre-determined distance is 3.5-4.5mm, preferably 4mm.
Wherein, the other end of the 8th minor matters 1221 is connect with one end of the 9th minor matters 1222, the 8th minor matters
1221 is vertical with the 9th minor matters 1222；9th minor matters 1222 and third radiation minor matters 121 are located at described
The two sides of 8th minor matters 1221；The length of 8th minor matters 1221 is less than the length of third radiation minor matters 121；8th
The other end of section 1221 is the 4th pre-determined distance at a distance from the tenth minor matters 1223.
Optionally, the 4th pre-determined distance is 1.5-2.5mm, preferably 2mm.
Optionally, 1111 length of the first minor matters be 9-10.4mm, preferably 9.7.Second minor matters length 1112 is 2-3mm,
Preferably 2.5mm.1113 length of third minor matters is 1-2mm, preferably 1.5mm.First pre-determined distance is 6.5-7.5mm.It is preferred that
For 7mm.
Optionally, the width of the 4th minor matters 1114 is 1.5mm, and the length of the 5th minor matters 1115 is 14mm.
Optionally, the length of the 6th minor matters 1122 is 7.5-8.5mm, specially 8mm.7th minor matters, 1121 length is 5.5-
6.5mm.Specially 6mm.
Optionally, the length of third radiation minor matters 121 is 11-13mm；The third radiation minor matters 121 are in the medium base
The length of projection and the contact projection of the first group of radiation minor matters 11 on the medium substrate 2 on plate 2 is 4.5-6mm,
The third pre-determined distance is 3.5-4.5mm；9th minor matters, 1223 length is 11.5-13mm.
Wherein, on the length direction of radiating element, third radiates side of the minor matters 121 far from first group of radiation minor matters 11
A lateral extent with the 6th minor matters 1122 far from second group of radiation minor matters 12 is 15mm.The third radiation minor matters 121 length be
12mm, so that the occupied area of the radiating element is 15mm*12mm.It can be seen that the area of the radiating element is smaller.
The radiating element that first embodiment of the invention provides is provided with multiple radiation minor matters, by between radiation minor matters
Ultra-wide band can be covered by intercoupling, and meet the needs of various communication standards.Radiating element provided in an embodiment of the present invention, accounts for
It is 15mm*12mm with space, very little, with strong applicability compared with the prior art, can preferably be suitable for ultra-thin mobile phone.
Fig. 2 is a kind of MIMO antenna structure of mobile phole schematic diagram that second embodiment of the invention provides.
As shown in Fig. 2, 2 He of medium substrate of radiating element 1 and fitting setting that at least two first embodiment provides
Bottom plate 3；Medium substrate 2 is rectangular configuration, and 2 radiating elements 1 are respectively arranged at adjacent two vertex of medium substrate 2；
Bottom plate 3 is rectangular configuration, and the area of bottom plate is less than the area of substrate, to avoid the radiating element 1 is blocked；On bottom plate 3,
And it is located at the slot 31 being provided between 2 radiating elements 1 for increasing isolation between antennas.
Preferably, which is T shape, which is defect ground structure, and additional coupling can be provided for electromagnetic wave
Current path is closed, the original couple current from excitation port to non-actuated port can be weakened in this way.
Specifically, slot 31 includes the first slot 311 and the second slot 312 of vertical connection；One end of first slot 311 and bottom plate
Edge connection, the other end are connected to second slot 312；And the central axis of the central axis of first slot 311 and bottom plate 3
It is overlapped.
Specifically, the size of the slot 31 is as follows: the length of the second slot 312 is 20-30mm, preferably 26mm, width 1-
5mm, preferably 3mm.It is apart 8-16mm, preferably 12mm between the long side of second slot 312 and the width of bottom plate 3.First slot 311
Length be 6-12mm, preferably 9mm, width 1-5mm, preferably 3mm.First slot 311 and the second slot 312 form " T "
Shape structure.
The purpose that " T " shaped slot is provided at the axis of bottom plate 3 is: a part of electromagnetic wave of aerial radiation can be with electromagnetism
The mode of induction is gathered in "T"-shaped slot and forms induced current, thus reduces influence of the electromagnetic wave to other ports.
For citing, for example, a part of electromagnetic wave W that the port of upper left side generates1Can in a manner of electromagnetic induction
Induced current is generated in slot, and these induced currents also can radiated electromagnetic wave W2, electromagnetic wave W2One can be generated in the port of upper right side
The new induced current b of item.Induced current just has two parts a+b in this way at the port of upper right side, and a is before from upper left side
Mouthful to upper right side ports induced current.This two parts current direction is on the contrary, one part of current is cancelled out each other, to reduce both ends
Influencing each other between mouthful.
It should be noted that being additionally provided with feeder line 4, the feedback in the antenna for mobile phone that second embodiment of the invention provides
Line 4 is the microstrip line that characteristic impedance is 50 ohm.Side feeding classification, example shown in Fig. 2 are used in second embodiment
In, the stain in dotted line frame is then feeding point.The front for being expressed as antenna for mobile phone of black, grey are expressed as the antenna for mobile phone
The back side.
Optionally, the material of the radiating element 1 of the antenna for mobile phone and bottom plate 3 is the copper of 1oz thickness.
Optionally, first group of radiation minor matters 11 is arranged on medium substrate 2 by way of printing, second group of radiation minor matters
12 are bonded also by mode of printing with medium substrate 2 with 3 integrated setting of bottom plate, second group of radiation minor matters 12 with bottom plate 3.
In a preferred embodiment, in a preferred embodiment, radiating element 1 is 4；4 radiating elements 1
It is respectively arranged at 4 vertex of the medium substrate 2；The number of slot 31 is 2, and 2 slots 31 are oppositely arranged.In the present embodiment
In the antenna for mobile phone of middle offer, there are four radiating elements 1 for setting, are located on four right angles of medium substrate 2, each spoke
The corresponding input port of unit 1 is penetrated, port input impedance is 50 ohm.This " defect " structure of slot 31 by T shape
Successfully make each interport isolation full frequency band of antenna better than 12dB.
Preferably, medium substrate 2 is made of FR4 material, and the size of the medium substrate 2 is long 140mm* wide 80mm* high
0.8mm.Wherein, thickness of the 0.8mm between the positive radiating element of medium substrate 2 and the radiating element at the back side.Use FR4 material
Medium substrate 2 made of expecting, it is widely used and low in cost, it is manufactured convenient for large-scale.
MIMO antenna for mobile phone provided in an embodiment of the present invention, is provided with multiple radiating elements, by the edge of bottom plate,
Slot for increasing isolation between antennas is set, the influence between multiple radiating elements can be reduced, enables to multiple radiation single
Member works at the same time, and MIMO antenna for mobile phone provided in an embodiment of the present invention, has multiple radiating elements, between each radiating element
Isolation is higher, can increase considerably transmission rate.Also, the mimo antenna can also cover ultra-wide band, Neng Gouman
The needs of a variety of communication standards of foot.
The antenna that the present invention also provides second embodiment is emulated and has been tested respectively.
Fig. 3 schematically shows the return loss schematic diagram of the antenna for mobile phone of second embodiment.
As shown in figure 3, present embodiment is to tool, there are four the antenna for mobile phone of radiating element to be emulated and tested, and makes
The return loss schematic diagram of the antenna is made.The antenna is ultra wide band MIMO antenna for mobile phone, the return loss of inventive antenna with-
6dB is standard, it is seen then that there are four the bandwidth of the antenna for mobile phone of radiating element can satisfy LTE2300 (2305- for the tool
2400MHz), LTE2500 (2500-2690MHz), WIFI (2400-2484MHz, 5725-5825MHz), WiMAX (2500-
2700MHz, 3300-3800MHz), LTE/42/43/46 (3400-3800MHz, 5150-5925MHz), UWB low-frequency range (3100-
The needs of communication standards such as 4800MHz) are completely suitable for current with the later 5G epoch.As can be seen from Figure 3 antenna is imitative
Very there is preferable consistency with measurement result, further demonstrate the superiority of the working performance of this mimo antenna.
As can be seen from the figure the frequency range that antenna is worked.Using -6dB as standard, -6dB or less is the curve below dotted line
It all can be considered that working condition is good.S11To be fed in upper left side port, when other three port match (connecing 50 ohm loads),
The reflection coefficient of left side port.S22It is right when other three port match (connecing 50 ohm loads) to be fed in upper right side port
The reflection coefficient of top port.Similarly, S33For the reflection coefficient of lower left port, S44For the reflection coefficient of lower right port.
Wherein, the solid dot of the square shape of solid line connection is the reflection coefficient to upper left side port, i.e. emulation S11, dotted line company
The solid dot of the square shape connect is the measured value to the reflection coefficient of upper left side port, i.e. measurement S11, the circle of dotted line connection is in fact
Heart point is the measured value to the reflection coefficient of upper right side port, i.e. measurement S22.The solid dot of the upper triangle of dotted line connection is pair
The measured value of the reflection coefficient of lower left port, i.e. S33.The solid dot of the lower triangle of dotted line connection is to lower right port
The measured value of reflection coefficient, i.e. S44。
As can be seen from Figure 3 antenna institute's working frequency range is 2300-2690MHz and 3300-6000MHz, before being able to demonstrate that
The various communication standards that face is mentioned can satisfy.S11-S44Curve essentially coincides, and can prove that the superiority of antenna performance.
Fig. 4 is schematically shown with the transmission coefficient schematic diagram in antenna for mobile phone, between four ports.
As shown in Figure 4, wherein solid line connection block form point be emulate obtain in 1,3,4 port match, from
The transmission coefficient of 2 ports to 1 port referred to as emulates S12, similar below.The point of the triangle of solid line connection is emulation S13.Solid line
The circular point of connection is emulation S14.The point of the block form of dotted line connection is measurement S12, the point of triangle of dotted line connection is
Measure S13.The circular point of dotted line connection is measurement S14。
The isolation of antenna port is the absolute value of transmission coefficient, and as shown in Figure 5, the isolation between port is better than
12dB fully meets actual demand.
Second embodiment of the invention is also emulated and has been tested to the radiating element,
As shown in figure 5, solid dot indicates that the result schematic diagram of emulation, hollow dots indicate the result schematic diagram of measurement in figure,
Wherein, the solid dot of block form indicates the GainPhi that emulation obtains, and circular solid dot indicates what emulation obtained
GainThata, the hollow dots of block form indicate the GainPhi that measurement obtains, and circular solid dot indicates what measurement obtained
GainThata.Wherein, Phi is with x-axis angle in x/y plane, and Theta is x/y plane and z-axis angle, and GainPhi is the direction Phi
Gain, direction is disc normal orientation, and GainTheta is Theta directive gain, and direction is the tangent line side of x/y plane inner circle
To.
When testing antenna radiation pattern, Single port is fed, three ports in addition connect 50 ohm of matched loads.
Fig. 5 (a) schematically shows two-dimensional radiation direction of the antenna for mobile phone of second embodiment offer in 2500MHz
Figure.
Fig. 5 (b) schematically shows two-dimensional radiation direction of the antenna for mobile phone of second embodiment offer in 3500MHz
Figure.
Fig. 5 (c) schematically shows two-dimensional radiation direction of the antenna for mobile phone of second embodiment offer in 5750MHz
Figure.
From in the comparison of above-mentioned emulation and measurement, it can be seen that the antenna for mobile phone is in X-Y, X-Z, the two-dimensional directional in the face Y-Z
Emulation and measurement result have preferable consistency.Existing error may be caused by processing and test environment.By this
Figure can be derived that the radiation pattern has omni-directional, and radiance is preferable.
Fig. 6 schematically shows the result that tool is emulated there are four the radiation efficiency of the MIMO antenna for mobile phone of port with gain and shows
It is intended to.
As shown in fig. 6, by tool, there are four the antenna for mobile phone of port to be emulated with CST software.Wherein, the reality of dotted line connection
Heart point is expressed as the working efficiency of antenna, and the hollow dots of solid line connection indicate the gain of antenna.Scheme in order to facilitate observation of, the present embodiment
Middle circle and arrow pointing left with dotted line, expression should be observed referring to the efficiency calibration in left side, the circle and finger of dotted line
Arrow to the right, expression should be observed referring to the gain step on right side.
As shown in Figure 6, the total working efficiency full frequency band of antenna provided in this embodiment is higher than 0.52, maximum gain full range
Section is higher than 3.5dB.It can be seen that the gain of antenna and efficiency are higher, the radiance of antenna is good.
Fig. 7 ECC emulation knot schematic diagram between each port of antenna.
As shown in fig. 7, the embodiment of the present invention is to tool, there are four the antenna for mobile phone of port into ECC emulation, and draws and finish
Fruit figure.Wherein, the point of the rectangular shape connected by solid line, the ECC value being expressed as between the obtained port 1 of emulation and port 2.
The circular point connected by solid line, the ECC value being expressed as between the obtained port 1 of emulation and port 3.It is connected by solid line
The point of upper triangle, the ECC value being expressed as between the obtained port 1 of emulation and port 4.The lower triangle connected by a dotted line
Point, the ECC value being expressed as between the obtained port 2 of emulation and port 3.The point of the diamond shape connected by a dotted line, is expressed as emulating
ECC value between obtained port 2 and port 4.The point of the Pentagram shape connected by a dotted line is expressed as the end that emulation obtains
ECC value between mouth 3 and port 4.
It is shown from result figure, there are four the antenna for mobile phone ECC values of port 0.15 for tool provided in an embodiment of the present invention
Hereinafter, the outstanding standard 0.3 compared to MIMO antenna for mobile phone ECC, effect is more preferable.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (15)
1. a kind of MIMO handset antenna radiation unit (1), which is characterized in that first group including being located at medium substrate (2) one side
It radiates minor matters (11) and is located at second group of radiation minor matters (12) of medium substrate (2) another side；First group of radiation minor matters
(11) it is staggered with second group of radiation minor matters (12) in the projection of the medium substrate (2).
2. a kind of MIMO handset antenna radiation unit (1) according to claim 1, which is characterized in that
First group of radiation minor matters (11) includes the first radiation minor matters (111) and the second radiation minor matters (112) interconnected；
Second group of radiation minor matters (12) includes third radiation minor matters (121) interconnected and the 4th radiation minor matters (122)；
Projection of the one end of 4th radiation minor matters (122) far from third radiation minor matters (121) on the medium substrate (2)
Be formed as bathtub construction, the one end of second radiation minor matters (112) far from first radiation minor matters (111) is in the medium
Projection on substrate (2) is plugged in the bathtub construction；
The one end of third radiation minor matters (121) far from the 4th radiation minor matters (122) the medium substrate (2) projection with
Projection of the one end of first radiation minor matters (111) far from second radiation minor matters (112) on the medium substrate (2)
Fitting.
3. a kind of MIMO handset antenna radiation unit (1) according to claim 2, which is characterized in that first radiation
Minor matters (111) include the first minor matters (1111), the second minor matters (1112), third minor matters (1113), the 4th minor matters (1114) and the
Five minor matters (1115)；
One end of second minor matters (1112) is connect with one end of first minor matters (1111) and second minor matters
(1112) and first minor matters (1111) are vertical；The third minor matters (1113) are vertical with the first minor matters (1111), institute
Stating third minor matters (1113) and second minor matters (1112), to be located at first minor matters (1111) ipsilateral, with second minor matters
(1112) it is equipped with the first pre-determined distance；
One end of 5th minor matters (1115) is connect with the other end of second minor matters (1112), the 5th minor matters
(1115) vertical with the second minor matters (1112)；5th minor matters (1115) and the first minor matters (1111) are located at described second
Minor matters (1112) it is ipsilateral, second minor matters (1112) far from the 5th minor matters (1115) and the first minor matters (1111) one
The one end of projection of the side on the medium substrate (2) and third radiation minor matters (121) far from the 4th radiation minor matters (122)
Fitting；
4th minor matters (1114) connect with one end of the 5th minor matters (1115), the 4th minor matters (1114) and the second minor matters
(1112) two sides of the 5th minor matters (1115) are located at；
The third minor matters (1113) and the 5th minor matters (1115) are provided with the second pre-determined distance.
4. a kind of MIMO handset antenna radiation unit (1) according to claim 2, which is characterized in that second radiation
Minor matters (112) include the 6th minor matters (1122) and the 7th minor matters (1121)；
One end of 6th minor matters (1122) is connect with first radiation minor matters (111)；6th minor matters (1122) it is another
End is connect with one end of the 7th minor matters (1121), and the 6th minor matters (1122) are vertical with the 7th minor matters (1121)；
Projection of the other end of 7th minor matters (1121) on the medium substrate (2) is plugged in the bathtub construction.
5. a kind of MIMO handset antenna radiation unit (1) according to claim 2, which is characterized in that
4th radiation minor matters (122) includes the 8th minor matters (1221), the 9th minor matters (1222) and the tenth minor matters (1223)；
One end of tenth minor matters (1223) and third radiation minor matters (121) are connect, the tenth minor matters (1223) with it is described
It is vertical that third radiates minor matters (121)；
One end of 8th minor matters (1221) is connect with the middle part of the tenth minor matters (1223), the 8th minor matters (1221)
It is vertical with the tenth minor matters (1223)；8th minor matters (1221) and third radiation minor matters (121) are located at described the
Ten minor matters (1223) it is ipsilateral；8th minor matters (1221) and third radiation minor matters (121) be provided with third it is default away from
From；
The other end of 8th minor matters (1221) is connect with one end of the 9th minor matters (1222), the 8th minor matters
(1221) vertical with the 9th minor matters (1222)；9th minor matters (1222) and third radiation minor matters (121) are respectively
Positioned at the two sides of the 8th minor matters (1221)；
The length of 8th minor matters (1221) is less than the length of third radiation minor matters (121)；
The other end of 8th minor matters (1221) is the 4th pre-determined distance at a distance from the tenth minor matters (1223).
6. a kind of MIMO handset antenna radiation unit (1) according to claim 3, which is characterized in that first minor matters
(1111) length is 9-10.4mm, and the second minor matters length (1112) is 2-3mm, and third minor matters (1113) length is 1-2mm,
First pre-determined distance is 6.5-7.5mm.
7. a kind of MIMO handset antenna radiation unit (1) according to claim 3, which is characterized in that the 4th minor matters
(1114) width is 1.5mm, and the length of the 5th minor matters (1115) is 12-16mm；Second pre-determined distance is 0.5-
1.5mm。
8. a kind of MIMO handset antenna radiation unit (1) according to claim 4, which is characterized in that the 6th minor matters
(1122) length is 7.5-8.5mm, and the 7th minor matters (1121) length is 5.5-6.5mm.
9. a kind of MIMO handset antenna radiation unit (1) according to claim 5, which is characterized in that the third radiation
The length of minor matters (121) is 11-13mm；
Projection and the first group radiation minor matters (11) of third radiation minor matters (121) on the medium substrate (2) exist
The length of the contact projection on the medium substrate (2) is 4.5-6mm, and the third pre-determined distance is 3.5-4.5mm；
9th minor matters (1223) length is 11.5-13mm.
10. a kind of MIMO handset antenna radiation unit (1) according to claim 5, which is characterized in that the described 4th is default
Distance is 1.5-2.5mm.
11. a kind of MIMO antenna for mobile phone, which is characterized in that single including the described in any item radiation of at least two such as claim 1-7
The medium substrate (2) and bottom plate (3) of first (1) and fitting setting；
The medium substrate (2) is rectangular configuration, and 2 radiating elements (1) are respectively arranged at the adjacent of medium substrate (2)
Two vertex；
The bottom plate (3) is rectangular configuration, and the area of the bottom plate (3) is less than the area of the medium substrate (2), to avoid
Block the radiating element (1)；It is provided on the bottom plate (3), and between 2 radiating elements (1) for increasing
The slot (31) of big isolation between antennas.
12. MIMO antenna for mobile phone according to claim 11, which is characterized in that the radiating element (1) is 4；
4 radiating elements (1) are respectively arranged at 4 vertex of the medium substrate (2)；
The number of the slot (31) is 2, and 2 slots (31) are oppositely arranged.
13. MIMO antenna for mobile phone according to claim 11 or 12, which is characterized in that the slot (31) includes vertical connection
The first slot (311) and the second slot (312)；
One end of first slot (311) is connected to the edge of the bottom plate (3), and the other end is connected to second slot (312)；
And the central axis of first slot (311) is overlapped with the central axis of the bottom plate (3).
14. MIMO antenna for mobile phone according to claim 11 or 12, which is characterized in that the slot (31) is "T"-shaped.
15. MIMO antenna for mobile phone according to claim 11, which is characterized in that the medium substrate (2) is by FR4 material system
At.
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| CN114865309A (en) * | 2022-04-18 | 2022-08-05 | 湖南大学 | Broadband decoupling MIMO mobile phone antenna for Sub-6GHz |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110931964A (en) * | 2019-10-24 | 2020-03-27 | 广东工业大学 | Miniaturized MIMO multifrequency cell-phone antenna |
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| CN112054294A (en) * | 2020-08-03 | 2020-12-08 | 中山大学 | Compact cross-polarized twelve-unit 5G multi-input multi-output antenna |
| CN114914665A (en) * | 2021-02-08 | 2022-08-16 | 华为技术有限公司 | Antenna and terminal equipment |
| CN114914665B (en) * | 2021-02-08 | 2023-09-22 | 华为技术有限公司 | Antenna and terminal equipment |
| CN114865309A (en) * | 2022-04-18 | 2022-08-05 | 湖南大学 | Broadband decoupling MIMO mobile phone antenna for Sub-6GHz |
| CN114865309B (en) * | 2022-04-18 | 2024-05-28 | 湖南大学 | Broadband decoupling MIMO mobile phone antenna for Sub-6GHz |
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