CN201893439U

CN201893439U - Multi-antenna system

Info

Publication number: CN201893439U
Application number: CN2009203175375U
Authority: CN
Inventors: 黄小刚; 黎梅
Original assignee: Ambit Microsystems Shanghai Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Ambit Microsystems Shanghai Ltd
Priority date: 2009-12-16
Filing date: 2009-12-16
Publication date: 2011-07-06
Anticipated expiration: 2019-12-16

Abstract

A multi-antenna system includes a substrate provided with a clearance area and a metal layer, and a first antenna, a second antenna and an isolation unit arranged in the clearance area. The isolation unit is located between the first antenna and the second antenna, and the isolation unit includes a first isolation part and a second isolation part, both of which are "T" shaped and connected to the metal layer. The above multi-antenna system realizes the isolation of the first antenna and the second antenna through the isolation unit, reduces the degree of coupling, improves the radiation performance, and has a smaller size at the same time.

Description

Multiaerial system

Technical field

The utility model relates to antenna, relates in particular to a kind of multiaerial system.

Background technology

Antenna is as one of critical elements of wireless communications products, and the size of its performance and size is directly connected to the quality of wireless communications products.Along with communication products are more and more higher to the requirement of signal strength signal intensity, multiaerial system has become the main flow that use in market.And in communication products, form interference between many antennas, then becoming needs the problem that solves in the design.

One of common method for designing is with the two ends of many Antenna Design in communication products, increases isolation to reduce interference by space length, and still suitable space length can make the size of multiaerial system become big.Two of common method for designing is that many antennas are designed to different polarised directions, and the radiation direction by changing antenna is disturbed reducing, but can increase the difficulty of Antenna Design and combination.

And it is less how to design a kind of size, and the multiaerial system that has superperformance again becomes urgent problem.

The utility model content

In view of this, need provide a kind of multiaerial system, have less size, have good performance again.

The multiaerial system that provides in the utility model execution mode, first antenna, second antenna and the isolated location that comprise the substrate that is provided with headroom district and metal level and be arranged at the headroom district.Isolated location is between first antenna and second antenna, and isolated location comprises first isolation part and second isolation part, all is "T"-shaped, and is connected in metal level.

Preferably, described isolated location adopts little band metal wire, forms choke jointly with described metal level.

Preferably, form first gap between described first isolation part and described second isolation part.

Preferably, form second gap between described first isolation part and described first antenna, form third space between described second isolation part and described second antenna.

Preferably, described first isolation part comprises first vertical section and first horizontal segment, and wherein said first vertical section is vertically connected at described metal level, and is vertically connected at the centre of described first horizontal segment.

Preferably, described second isolation part comprises second vertical section and second horizontal segment, and wherein said second vertical section is vertically connected at described metal level, and is vertically connected at the centre of described second horizontal segment.

Preferably, described first isolation part and described second isolation part are linearly symmetrical.

Preferably, described first antenna and described second antenna are operated in the same frequency range.

Preferably, described first antenna is different with the shape of described second antenna.

Preferably, described first antenna is identical with the shape of second antenna.

Compared to prior art, above-mentioned multiaerial system reduces the degree of coupling by the isolation of isolated location realization to first antenna and second antenna, has improved radiance, has less size simultaneously.

Description of drawings

Fig. 1 is the schematic diagram of multiaerial system in the utility model execution mode.

Fig. 2 is the dimensional drawing of multiaerial system in the utility model execution mode.

Fig. 3 a is the isolation degree test figure that is provided with the multiaerial system of isolated location in the utility model execution mode.

Fig. 3 b is the isolation degree test figure that the multiaerial system of isolated location is not set.

The main element explanation

Multiaerial system 100

Substrate 10

Headroom district 11

Metal level 12

First antenna 21

First feeding portion 211

Second antenna 22

Second feeding portion 221

Isolated location 30

First isolation part 31

First vertical section 311

First horizontal segment 312

Second isolation part 32

Second vertical section 321

Second horizontal segment 322

First gap 41

Second gap 42

Third space 43

Embodiment

Consult Fig. 1, be the schematic diagram of multiaerial system 100 in the utility model execution mode.In the present embodiment, multiaerial system 100 comprises substrate 10, first antenna 21, second antenna 22 and isolated location 30.

Substrate 10 is provided with headroom district 11 and metal level 12.

First antenna 21 and second antenna 22 are arranged at the both sides in headroom district 11, are used to increase space isolation.In the present embodiment, first antenna 21 comprises first feeding portion 211, is used for FD feed to the first antenna 21.Second antenna 22 comprises second feeding portion 221, is used for FD feed to the second antenna 22.First antenna 21 and second antenna 22 work in the same frequency range, are respectively applied for to receive and the transmission electromagnetic wave signal.In the present embodiment, owing to be provided with isolated location 30 between first antenna 21 and second antenna 22, therefore first antenna 21 can be identical with shape, size and the polarised direction of second antenna 22, also can be different, according to the demand of multiaerial system 100, can freely design.Because when shape, when size is all identical with polarised direction, therefore the electromagnetic wave signal interference maximum between the antenna 21,22, as example, but is not limited to this in the present embodiment.In other embodiments, under identical with the polarised direction part or the diverse situation of shape, the size of antenna 21,22, the design of isolated location 30 is suitable for too.

Isolated location 30 comprises first isolation part 31 and second isolation part 32.First isolation part 31 and second isolation part 32 all are "T"-shaped, and the straight line symmetry.

First isolation part 31 comprises first vertical section 311 and first horizontal segment 312.First vertical section 311 is vertically connected between the middle part of the metal level 12 and first horizontal segment 312.Second isolation part 32 comprises second vertical section 321 and second horizontal segment 322.Second vertical section 321 is vertically connected between the middle part of the metal level 12 and second horizontal segment 322.Second horizontal segment 322 and first horizontal segment 312 are on same rectilinear direction.

In the present embodiment, isolated location 30 adopts little band metal wire, with the metal level 12 common chokes that form, is used to reduce the degree of coupling between first antenna 21 and second antenna 22, avoids the electromagnetic signal between first antenna 21 and second antenna 22 to disturb.

In the present embodiment, the length of isolated location 30 and the design of width can be done suitably to adjust according to the change of first antenna 21 and second antenna 22, to be adjusted to isolation the best.In the present embodiment, the change of antenna 21,22 comprises shape, size and polarised direction etc.

In the present embodiment, form formation third space 43 between second gap, 42, the second isolated locations 32 and second antenna 22 between first isolation part 31 and second isolation part 32 between formation 41, the first isolation parts 31, first gap and first antenna 21.Described gap 41,42,43 can be used for strengthening the effect of the isolation of isolated location 30, and the electromagnetic signal that reduces between the antenna 21,22 is disturbed.

See also Fig. 2, be depicted as the dimensional drawing of multiaerial system 100 in the utility model execution mode.The length in headroom district 11 is 130 millimeters (mm), and width is 15mm.The length of first antenna 21 and second antenna 22 is 40mm, and width is 1mm.The length of first horizontal segment 312 and second horizontal segment 322 is 28mm, and width is 6mm, and the length of first vertical section 311 and second vertical section 321 is 4mm, and width is 4mm.The length in first gap 41 is 4mm, and second gap 42 is all 27mm with the length of third space 43.

Fig. 3 (a) is for being provided with the multiaerial system 100 of isolated location 30 in the present embodiment, Fig. 3 (b) is not for being provided with the multiaerial system of isolated location 30, from the contrast as can be seen, near frequency 2.4GHz working frequency range, be provided with isolated location 30, the return loss of multiaerial system 100 reduces to by about-11dB-20dB about, radiance improves obviously.

Claims

1. A multi-antenna system, comprising a substrate provided with a clearance area and a metal layer, and a first antenna, a second antenna, and an isolation unit arranged in the clearance area, the isolation unit being located between the first antenna and the Between the second antenna, it is characterized in that: the isolating unit includes a first isolating portion and a second isolating portion, both of the first isolating portion and the second isolating portion are in a “T” shape and are connected to the metal layer.

2. The multi-antenna system according to claim 1, wherein the isolating unit is a microstrip metal wire, which forms a choke coil together with the metal layer.

3. The multi-antenna system according to claim 2, wherein a first gap is formed between the first isolation part and the second isolation part.

4. The multi-antenna system according to claim 3, wherein a second gap is formed between the first isolation part and the first antenna, and a gap is formed between the second isolation part and the second antenna. A third gap is formed.

5. The multi-antenna system according to claim 4, wherein the first isolation portion comprises a first vertical section and a first horizontal section, wherein the first vertical section is vertically connected to the metal layer and the Between the middle of the first horizontal section.

6. The multi-antenna system according to claim 5, wherein the second isolation portion comprises a second vertical section and a second horizontal section, wherein the second vertical section is vertically connected to the metal layer and the Between the middle of the second horizontal section.

7. The multi-antenna system according to claim 1, wherein the first isolation part and the second isolation part are linearly symmetrical.

8. The multi-antenna system according to claim 1, wherein the first antenna and the second antenna work in the same frequency band.

9. The multiple antenna system of claim 8, wherein the first antenna and the second antenna have different shapes.

10. The multi-antenna system of claim 8, wherein the first antenna and the second antenna have the same shape.