CN107634306A - A kind of magnetic material high isolation MIMO antenna for mobile phone - Google Patents
A kind of magnetic material high isolation MIMO antenna for mobile phone Download PDFInfo
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Abstract
It is an object of the invention to propose a kind of small size, wide-band, high transfer rate, operating factor of highband and the antenna system of mobile phone of isolation function admirable, provide a kind of magnetic material high isolation MIMO antenna for mobile phone, the addition of magnetic material causes the isolation function admirable between sub-antenna, 20dB is respectively less than in communication band, antenna is planar structure and magnetic membrane material thickness very little, in micron order, suitable for ultra-thin smart handset.In addition, using multiple-input and multiple-output（MIMO）Antenna for mobile phone technology further increases transmission rate and band efficiency under current spectral resource, it is overall to be advantageous to offset the common mode disturbances between a part of antenna using symmetrical structure, it is not added with any lamped element, reduce aerial loss, reach below 20dB in low-frequency range (824 960MHz) interior test result S21, low frequency isolation is better.
Description
Technical field
The invention belongs to antenna technical field, and in particular to a kind of magnetic material high isolation MIMO antenna for mobile phone.
Background technology
With the fast development of radio communication, sharp increase of the user to the big throughput data amount demand of mobile communication, especially
It is that wireless application to real-time Transmission mass data proposes higher requirement, the mode in people's touching and the cognition world is sent out
Give birth to and profoundly change, and current communication has been difficult to meet the needs of people are to big throughput data amount, therefore, multiple antennas skill
Art --- multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) communication technology, there is provided solving should
The new way of problem.It uses multiple antennas at Radio Link both ends, receives and launches simultaneously respectively, being capable of abundant development space
Resource, in the case where frequency spectrum resource and transmission power need not be increased, exponentially lift the capacity and reliability of communication system.
Key equipment of the mobile phone as wireless communication industry, direct experience of the people to radio communication quality is affected, and
Antenna for mobile phone is the factor for determining mobile communication quality critical again, directly determines that can mobile phone continue to lead Communications Market.Small chi
Very little, wide-band, multiband are always the focus of antenna for mobile phone research, and multiple-input and multiple-output（MIMO）Antenna for mobile phone is in satisfaction
State and further increase high transfer rate and band efficiency under requirement and current spectral resource.
Therefore, a small size, wide-band, high transfer rate, operating factor of highband and isolation function admirable are designed
Multiple-input and multiple-output（MIMO）Antenna for mobile phone has broad application prospects.
China Patent Publication No. CN204809382, publication date on November 25th, 2015, the entitled LTE/ of innovation and creation
The MIMO antenna for mobile phone of WWAN frequency ranges, this application case disclose a kind of MIMO antenna for mobile phone of LTE/WWAN frequency ranges, bag
Include substrate, feed minor matters one, feed minor matters two, radiation zone one, radiation zone two, metal ground plate；Upper surface of base plate is provided with feed
Minor matters one, feed minor matters two；Minor matters two are fed by lower horizontal rectangular patch, electric capacity one, L shapes paster, electric capacity two, upper horizontal square
Shape paster, inductance, left longitudinal rectangular patch, short-circuit cylinder one, electric capacity three, right longitudinal rectangular patch, short-circuit cylinder two form, its
Added lamped element i.e. inductance, electric capacity are disadvantageous in that, adds aerial loss, used dissymmetrical structure is unfavorable
Common mode disturbances between antenna is eliminated.
The content of the invention
It is an object of the invention to propose a kind of small size, wide-band, high transfer rate, operating factor of highband and isolation
Spend the antenna system of mobile phone of function admirable, there is provided a kind of magnetic material high isolation MIMO antenna for mobile phone.
The technical solution adopted for the present invention to solve the technical problems is：A kind of magnetic material high isolation MIMO mobile phones day
Line, including FR4 substrates (1), the first sub-antenna (2), the second sub-antenna (3), the first film (4), the second film (5) and metal
Earth plate (6)；First sub-antenna (2) and the second sub-antenna (3) are printed on the upper surface of substrate (1), on substrate (1)
Longitudinal centre line it is symmetrical；The first film (4) is covered in the first sub-antenna (2) upper surface and apart from substrate (1) top edge
At a certain distance from, the second film (5) is covered in the second sub-antenna (3) upper surface and at a certain distance from substrate (1) top edge,
The first film (4) is symmetrical along substrate (1) longitudinal centre line with the second film (5)；Metal ground plate (6) is printed on base
The back side of plate (1).
The addition of magnetic material of the present invention causes the isolation function admirable between sub-antenna, be respectively less than in communication band-
20dB, antenna are planar structure and magnetic membrane material thickness very little in micron order, suitable for ultra-thin smart handset.In addition, adopt
Use multiple-input and multiple-output（MIMO）Antenna for mobile phone technology further increases transmission rate and frequency band profit under current spectral resource
It is overall to be advantageous to offset the common mode disturbances between a part of antenna using symmetrical structure with rate, any lamped element is not added with, is reduced
Aerial loss, reaches below -20dB, low frequency isolation is better in the interior test result S21 of low-frequency range (824-960MHz).
Preferably, first sub-antenna (2) and the second sub-antenna (3) are planar structure printed antenna.
Preferably, first sub-antenna (2), including：First feed strip (21), the first couple feed band (22),
One auxiliary couple feed band (23) and the first auxiliary couple feed band (24)；First feed strip (21), including the first feedback
Electric point (211) and the first inverted L shape feed strip (212), the first inverted L shape feed strip (212) and the distance of substrate (1) left hand edge are
11.5mm, the distance with substrate (1) top edge are 3mm；First distributing point (211) is arranged on the first inverted L shape feed strip (212)
The lower end of vertical minor matters；The first horizontal minor matters size of inverted L shape feed strip (212) is 11mm × 3.5mm, and vertical minor matters size is
8.5mm×1.5mm；The first couple feed band (22), including the first earth point (221), the first rectangle feed strip (222),
First L-type feed strip (223), the first reverse L type feed strip (224), the first U-shaped feed strip (225) and the first inverted L shape feed strip
(226)；First earth point (221) is arranged on the bottom of the first rectangle feed strip (222), the first rectangle feed strip (222)
Upper end and first L-type feed strip (223) horizontal minor matters right-hand member vertical connection, the vertical minor matters of the first L-type feed strip (223)
Upper end and the left end vertical connection of first reverse L type feed strip (224) horizontal minor matters, the vertical branch of the first reverse L type feed strip (224)
Save the right-hand member vertical connection of horizontal minor matters under upper end and the first U-shaped feed strip (225), horizontal branch on the first U-shaped feed strip (225)
The lower end vertical connection of the right-hand member of section and the vertical minor matters of the first inverted L shape feed strip (226), the first inverted L shape feed strip (226) are horizontal
It is concordant with the top edge of substrate (1) to the outside of minor matters, the left hand edge and substrate of first inverted L shape feed strip (226) horizontal minor matters
(1) left hand edge is concordant；The size of the first rectangle feed strip (222) is 1.5mm × 1mm；The first L-type feed strip
(223) size of horizontal minor matters is 11mm × 0.5mm, and the size of vertical minor matters is 4mm × 0.5mm；The first reverse L type feed
The size of band (224) horizontal minor matters is 11 mm × 0.5mm, and the size of vertical minor matters is 1.5mm × 1mm；The first U-shaped feedback
Horizontal minor matters size be 6mm × 2mm under electricity band (225), the vertical minor matters size of the first U-shaped feed strip (225) for 1.25mm ×
1mm, horizontal minor matters size is 6mm × 0.75mm on the first U-shaped feed strip (225)；The first inverted L shape feed strip (226) is perpendicular
It is 2mm × 1mm to minor matters size, horizontal minor matters size is 28mm × 2mm；The size of the first auxiliary couple feed band (23)
For 6mm * 7.5mm, the distance with the top edge of substrate (1) is 3mm；It is described first auxiliary couple feed band (24) size be
2mm * 13mm, the left hand edge distance of the first auxiliary couple feed band (24) left hand edge and substrate (1) is 15mm, and first aids in coupling
The top edge distance for closing feed strip (24) top edge and substrate (1) is 10mm.
Preferably, described the first film (4) and the second film (5) is automatic biasing nickel-zinc ferrite thin magnetic film.
In the present invention, the first film (4) and the second film (5) can be used as absorbing material or electromagnetic shielding material to use.
Preferably, described the first film (4) and the length and width dimensions of the second film (5) they are 22mm × 22mm, thickness
Scope is 2um-10um, and the top edge distance with substrate (1) is 4mm, covers antenna part area.
Preferably, described the first film (4) and the thickness of the second film (5) are 2um.
Preferably, the metal ground plate (6), including rectangle earth plate (61) and rectangle earth plate (62), rectangle connects
Floor (61) size is 100mm × 60mm, and rectangle earth plate (62) size is 15mm × 2mm；The rectangle earth plate (61)
The longitudinal centre line three of the longitudinal centre line and substrate (1) of longitudinal centre line and rectangle earth plate (62) overlaps, and rectangle connects
The lower end on floor (62) is connected with the upper end of rectangle earth plate (61), the upper end of rectangle earth plate (62) and the top of substrate (1)
Edge is concordant, and the lower end of earth plate (61) is concordant with the lower edge of substrate (1).
Preferably, the upper end of the rectangle earth plate (61) be provided with two it is symmetrical on the longitudinal centre line and
Size is 10mm × 1mm rectangular channel, and the left hand edge of left side rectangular channel is 26mm with the left hand edge distance of substrate (1).
Preferably, the size of the substrate (1) is 115mm × 60mm × 0.8mm.
Beneficial effects of the present invention：The present invention further reduces antenna size using couple feed technology, has reached small
Type, wide-band, the design requirement of multiband；With reference to automatic biasing nickel-zinc ferrite magnetic membrane material, the use of magnetic material
Not only largely improve the decoupling between antenna but also further reduce the size of antenna, greatly save mobile phone preciousness
Space resources；In addition, the design uses multiple-input and multiple-output（MIMO）Antenna for mobile phone technology enters one under current spectral resource
Step improves transmission rate and band efficiency, and the overall common mode for being advantageous to offset between a part of antenna using symmetrical structure is done
Disturb, be not added with any lamped element, reduce aerial loss, reach -20dB in low-frequency range (824-960MHz) interior test result
Hereinafter, low frequency isolation is better.
Brief description of the drawings
Fig. 1 is the antenna schematic perspective view of the present invention；
Fig. 2 is the top view of the present invention；
Fig. 3 is the left view of the present invention；
Fig. 4 is the earth plate schematic diagram of the present invention；
Fig. 5 is S11 the and S21 Parameter Maps of the present invention.
In figure：1-FR4 substrates, the sub-antennas of 2- first, the sub-antennas of 3- second, 4- the first ferrite magnetic material films, 5-
Second ferrite magnetic material film, 6- metal ground plates, the feed strip of 21- first, 22- the first couple feed bands, 23- first are auxiliary
Help couple feed band, 24- first aids in couple feed band, the distributing points of 211- first, 212- the first inverted L shape feed strip, 221- the
One earth point, 222- the first rectangle feed strip, 223- the first L-type feed strip, 224- the first reverse L type feed strip, 225- first are U-shaped
Feed strip, 226- the first inverted L shape feed strip, the feed strip of 31- second, 32- the second couple feed bands, the auxiliary coupling feedbacks of 33- second
Electric band, the auxiliary couple feed bands of 34- second, the feed strip of 31- second, the distributing points of 311- second, 312- the second inverted L shape feed strip,
The earth points of 321- second, 322- the second rectangle feed strip, 323- the second inverted L shape feed strip, 324- the second inverted L shape feed strip,
The second U-shaped feed strip of 325-, 326- the second inverted L shape feed strip, 61- rectangle earth plates, 62- rectangle earth plates, 63- rectangular channels,
64- rectangular channels.
Embodiment
Below by specific embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
A kind of magnetic material high isolation MIMO antenna for mobile phone, as shown in Figure 1, Figure 2 and Figure 3, including FR4 substrates (1), first
Sub-antenna (2), the second sub-antenna (3), the first film (4), the second film (5) and metal ground plate (6)；The first sub- day
Line (2) is identical with the second sub-antenna (3) structure, is planar structure printed antenna, is printed on the upper table of substrate (1)
Face, the longitudinal centre line on substrate (1) are symmetrical；The first film (4) is covered in the first sub-antenna (2) upper surface and apart from substrate
(1) top edge 4mm, the second film (5) are covered in the second sub-antenna (3) upper surface and apart from substrate (1) top edge 4mm, and first
Film (4) and the second film (5) size are 22mm × 22mm × 2um, are automatic biasing nickel-zinc ferrite thin magnetic film, along base
Plate (1) longitudinal centre line is symmetrical；Metal ground plate (6) is printed on the back side of substrate (1), and the size of substrate (1) is 115mm
×60mm×0.8mm。
First sub-antenna (2), including：First feed strip (21), the first couple feed band (22), the first auxiliary couple feed
Band (23) and the first auxiliary couple feed band (24).First feed strip (21), including the first distributing point (211) and the first inverted L
Type feed strip (212), the first inverted L shape feed strip (212) and the distance of substrate (1) left hand edge are 11.5mm, with substrate (1) top
The distance of edge is 3mm；First distributing point (211) is arranged on the lower end of the vertical minor matters of the first inverted L shape feed strip (212)；First falls
The horizontal minor matters size of L-type feed strip (212) is 11mm × 3.5mm, and vertical minor matters size is 8.5mm × 1.5mm；First coupling
Close feed strip (22), including the first earth point (221), the first rectangle feed strip (222), the first L-type feed strip (223), first
Reverse L type feed strip (224), the first U-shaped feed strip (225) and the first inverted L shape feed strip (226)；First earth point
(221) bottom of the first rectangle feed strip (222), upper end and the first L-type feed strip of the first rectangle feed strip (222) are arranged on
(223) the right-hand member vertical connection of horizontal minor matters, the upper end of the vertical minor matters of the first L-type feed strip (223) and the first reverse L type feed strip
(224) the left end vertical connection of horizontal minor matters, vertical minor matters upper end and the first U-shaped feed strip of the first reverse L type feed strip (224)
(225) the right-hand member vertical connection of horizontal minor matters under, the right-hand member of horizontal minor matters and the feedback of the first inverted L shape on the first U-shaped feed strip (225)
The lower end vertical connection of the vertical minor matters of electricity band (226), the outside and substrate (1) of first inverted L shape feed strip (226) horizontal minor matters
Top edge it is concordant, the left hand edge of first inverted L shape feed strip (226) horizontal minor matters is concordant with the left hand edge of substrate (1)；It is described
The size of first rectangle feed strip (222) is 1.5mm × 1mm；The size of the horizontal minor matters of the first L-type feed strip (223) is
11mm × 0.5mm, the size of vertical minor matters is 4mm × 0.5mm；The chi of the horizontal minor matters of the first reverse L type feed strip (224)
Very little is 11 mm × 0.5mm, and the size of vertical minor matters is 1.5mm × 1mm；Horizontal minor matters under the first U-shaped feed strip (225)
Size is 6mm × 2mm, and the vertical minor matters size of the first U-shaped feed strip (225) is 1.25mm × 1mm, the first U-shaped feed strip (225)
Upper horizontal minor matters size is 6mm × 0.75mm；The vertical minor matters size of the first inverted L shape feed strip (226) is 2mm × 1mm, horizontal
It is 28mm × 2mm to minor matters size；The size of the first auxiliary couple feed band (23) is 6mm * 7.5mm, with substrate (1)
The distance of top edge be 3mm；The size of the first auxiliary couple feed band (24) is 2mm * 13mm, and the first auxiliary couples
The left hand edge distance of feed strip (24) left hand edge and substrate (1) is 15mm, the first auxiliary couple feed band (24) top edge and base
The top edge distance of plate (1) is 10mm.
The structure of second sub-antenna (3) is corresponding with the structure of the first sub-antenna (2), including：Second feed strip (31),
Two couple feed bands (32), the second auxiliary couple feed band (33) and the second auxiliary couple feed band (34).Second feed strip
, including the second distributing point (311) and the second inverted L shape feed strip (312) (31).Second couple feed band (32), including second connect
It is place (321), the second rectangle feed strip (322), the second L-type feed strip (323), the second reverse L type feed strip (324), second U-shaped
Feed strip (325) and the second inverted L shape feed strip (326).The structure distribution of second sub-antenna (3) and the first sub-antenna (2)
Structure is with substrate（1）Longitudinal centre line for axle it is symmetrical.
Metal ground plate (6), as shown in figure 4, including rectangle earth plate (61) and rectangle earth plate (62), rectangle earth plate
(61) size is 100mm × 60mm, and rectangle earth plate (62) size is 15mm × 2mm；The longitudinal direction of the rectangle earth plate (61)
Center line overlaps with the longitudinal centre line of rectangle earth plate (62), lower end and the rectangle earth plate (61) of rectangle earth plate (62)
Upper end connects, and the upper end of rectangle earth plate (62) is concordant with the top edge of substrate (1), lower end and the substrate (1) of earth plate (61)
Lower edge it is concordant.The upper end of rectangle earth plate (61) is provided with that two symmetrical on the longitudinal centre line and size is
10mm × 1mm rectangular channel, the left side of left side rectangular channel are 26mm with the left hand edge distance of substrate (1).
As shown in figure 5, being S11 the and S21 Parameter Maps of the present invention, respectively illustrate in VSWR<3 i.e. S11<During -6dB and
VSWR<1.5 i.e. S21<During -10dB, the impedance bandwidth and isolation characteristic of antenna；S11 can be by LTE700/ as seen from the figure
GSM850/900/DCS1800/PCS1900/UMTS2100/LTE2300/LTE2500 communications bands and GNSS navigation frequency range are complete
All standing, meet multiband and wide band requirement；From the point of view of S21 curve distribution, in the isolation of the short internal antenna of communication frequency
Performance is very excellent to be respectively less than -20dB.
Embodiment described above is a kind of preferable scheme of the present invention, not makees any formal limit to the present invention
System, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (9)
1. a kind of magnetic material high isolation MIMO antenna for mobile phone, including FR4 substrates (1), it is characterised in that also include：First son
Antenna (2), the second sub-antenna (3), the first film (4), the second film (5) and metal ground plate (6)；
First sub-antenna (2) and the second sub-antenna (3) are printed on the upper surface of substrate (1), the longitudinal direction on substrate (1)
Center line is symmetrical；The first film (4) is covered in the first sub-antenna (2) upper surface and apart from the spacing of substrate (1) top edge one
From place, the second film (5) is covered in the second sub-antenna (3) upper surface and at a certain distance from substrate (1) top edge, and described
One film (4) is symmetrical along substrate (1) longitudinal centre line with the second film (5)；Metal ground plate (6) is printed on substrate (1)
The back side.
A kind of 2. magnetic material high isolation MIMO antenna for mobile phone according to claim 1, it is characterised in that first son
Antenna (2) and the second sub-antenna (3) are planar structure printed antenna.
A kind of 3. magnetic material high isolation MIMO antenna for mobile phone according to claim 2, it is characterised in that first son
Antenna (2), including：First feed strip (21), the first couple feed band (22), the first auxiliary couple feed band (23) and first
Aid in couple feed band (24)；
First feed strip (21), including the first distributing point (211) and the first inverted L shape feed strip (212), the feedback of the first inverted L shape
The distance of electricity band (212) and substrate (1) left hand edge is 11.5mm, and the distance with substrate (1) top edge is 3mm；First distributing point
(211) it is arranged on the lower end of the vertical minor matters of the first inverted L shape feed strip (212)；The first horizontal minor matters chi of inverted L shape feed strip (212)
Very little is 11mm × 3.5mm, and vertical minor matters size is 8.5mm × 1.5mm；
The first couple feed band (22), including the feedback of the first earth point (221), the first rectangle feed strip (222), the first L-type
Electricity band (223), the first reverse L type feed strip (224), the first U-shaped feed strip (225) and the first inverted L shape feed strip (226)；
First earth point (221) is arranged on the bottom of the first rectangle feed strip (222), the first rectangle feed strip (222)
The right-hand member vertical connection of upper end and first L-type feed strip (223) horizontal minor matters, the vertical minor matters of the first L-type feed strip (223) it is upper
End and the left end vertical connection of first reverse L type feed strip (224) horizontal minor matters, the vertical minor matters of the first reverse L type feed strip (224)
The right-hand member vertical connection of horizontal minor matters under upper end and the first U-shaped feed strip (225), horizontal minor matters on the first U-shaped feed strip (225)
Right-hand member and the vertical minor matters of the first inverted L shape feed strip (226) lower end vertical connection, the first inverted L shape feed strip (226) is laterally
The outside of minor matters is concordant with the top edge of substrate (1), the left hand edge and substrate of first inverted L shape feed strip (226) horizontal minor matters
(1) left hand edge is concordant；The size of the first rectangle feed strip (222) is 1.5mm × 1mm；
The size of the horizontal minor matters of the first L-type feed strip (223) is 11mm × 0.5mm, the sizes of vertical minor matters for 4mm ×
0.5mm；
The size of the horizontal minor matters of the first reverse L type feed strip (224) is 11 mm × 0.5mm, and the size of vertical minor matters is
1.5mm×1mm；
Horizontal minor matters size is 6mm × 2mm under the first U-shaped feed strip (225), the first vertical minor matters of U-shaped feed strip (225)
Size is 1.25mm × 1mm, and horizontal minor matters size is 6mm × 0.75mm on the first U-shaped feed strip (225)；
The vertical minor matters size of the first inverted L shape feed strip (226) is 2mm × 1mm, and horizontal minor matters size is 28mm × 2mm；
The size of the first auxiliary couple feed band (23) is 6mm*7.5mm, and the distance with the top edge of substrate (1) is 3mm；
The size of the first auxiliary couple feed band (24) is 2mm*13mm, and first aids in couple feed band (24) left hand edge
Left hand edge distance with substrate (1) is 15mm, the first auxiliary couple feed band (24) top edge and substrate (1) top edge distance
For 10mm.
A kind of 4. magnetic material high isolation MIMO antenna for mobile phone according to claim 1, it is characterised in that described first
Film (4) and the second film (5) are automatic biasing nickel-zinc ferrite thin magnetic film.
A kind of 5. magnetic material high isolation MIMO antenna for mobile phone according to claim 4, it is characterised in that described first
The length and width dimensions of film (4) and the second film (5) are 22mm × 22mm, thickness range 2um-10um, upper with substrate (1)
Edge Distance is 4mm, covers antenna part area.
A kind of 6. magnetic material high isolation MIMO antenna for mobile phone according to claim 5, it is characterised in that described first
The thickness of film (4) and the second film (5) is 2um.
7. a kind of magnetic material high isolation MIMO antenna for mobile phone according to claim 1, it is characterised in that the metal connects
Floor (6), including rectangle earth plate (61) and rectangle earth plate (62), rectangle earth plate (61) size are 100mm × 60mm, square
Shape earth plate (62) size is 15mm × 2mm；The longitudinal centre line of the rectangle earth plate (61) and rectangle earth plate (62)
The longitudinal centre line three of longitudinal centre line and substrate (1) overlaps, lower end and the rectangle earth plate of rectangle earth plate (62)
(61) upper end connection, the upper end of rectangle earth plate (62) is concordant with the top edge of substrate (1), the lower end of earth plate (61) and base
The lower edge of plate (1) is concordant.
8. a kind of magnetic material high isolation MIMO antenna for mobile phone according to claim 7, it is characterised in that the rectangle connects
The upper end on floor (61) is provided with that two symmetrical on the longitudinal centre line and size is 10mm × 1mm rectangular channel,
The left hand edge distance of the left hand edge of left side rectangular channel and substrate (1) is 26mm.
A kind of 9. magnetic material high isolation MIMO antenna for mobile phone according to claim 1, it is characterised in that the substrate
(1) size is 115mm × 60mm × 0.8mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899650A (en) * | 2018-07-09 | 2018-11-27 | 中国计量大学 | A kind of adjustable multiband antenna |
| WO2023221877A1 (en) * | 2022-05-20 | 2023-11-23 | 华为技术有限公司 | Antenna structure and electronic device |
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Application publication date: 20180126 |
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