CN202564541U

CN202564541U - Multi-frequency antenna

Info

Publication number: CN202564541U
Application number: CN 201220051199
Authority: CN
Inventors: 李琴芳; 俞斌; 吴荻
Original assignee: Huizhou Speed Wireless Technology Co Ltd
Current assignee: Huizhou Speed Wireless Technology Co Ltd
Priority date: 2012-02-17
Filing date: 2012-02-17
Publication date: 2012-11-28
Anticipated expiration: 2022-02-17

Abstract

The utility model discloses a multi-frequency antenna comprising a printed circuit board, a first branch wiring and a second branch wiring, wherein the first branch wiring and the second branch wiring are arranged on the printed circuit board, and respectively stretch right and left horizontally taking the joint point as the center; a first radiation metal dome which is in parallel with the first branch wiring is arranged above the first branch wiring on the printed circuit board; a second radiation metal dome which is in parallel with the second branch wiring is arranged above the second branch wiring on the printed circuit board; the a first radiation metal dome is connected with the side edge of the first branch wiring; and the second radiation metal dome is grounded through a parasitic short-circuit wire. The multi-frequency antenna not only can improve the high-frequency bandwidth, but also can improve the low-frequency bandwidth, thus being suitable for the requirements of LTE for the antenna, and having good whole performance for the antenna.

Description

Multifrequency antenna

Technical field

The utility model relates to a kind of antenna, especially relates to a kind of multifrequency antenna.

Background technology

LTE (Long Term Evolution, Long Term Evolution) project is the evolution of 3G, starts from the meeting of 3GPP in 2004.LTE is not the 4G technology that people generally misread, but a transition between 3G and the 4G technology is the global standards of 3.9G, and it improves and strengthened the aerial access technology of 3G, adopts OFDM and the MIMO sole criterion as its wireless network evolution.The peak rate of descending 326Mbit/s and up 86Mbit/s can be provided under the 20MHz spectral bandwidth.LTE has improved the performance of Cell Edge User, improves cell capacity and reduces system delay.3G continue to optimize with 4G evolution general layout under, in the face of the wretched insufficiency of frequency spectrum resource, the professional surge of big flow, on corollary equipments such as antenna the introducing new technology by operator as key project.

Under the evolution situation along with the 3G project, the inventor in the invention process, find existing notebook built-in aerial exist below individual problem.

1, present, notebook built-in W WAN multifrequency antenna is towards low-frequency range, little space; The high-performance direction develops, and product is main with the 3D form of metal clips+support/FPC+ support, but because design cycle is lack of standardization; The Antenna Design randomness is more intense, causes can having some problems in the R&D process.Comprise with notebook computer in space contradiction become increasingly conspicuous, the cabling complex forms, random strong, to such an extent as to the adjustment order is complicated when multiband antenna design, it is big to adjust difficulty.Simultaneously, disparity items difference is big, and the not versatility of Antenna Design causes R&D costs high, and resource consumption is big, how to make Antenna Design that very strong continuity and versatility are arranged, thereby reduces cost, and reduces difficulty, and the reduction construction cycle becomes one of difficult problem.

2, be the narrow frame designer trends of representative because the T of IBM Corporation series has appearred in notebook design, the space that causes leaving for antenna is narrow and small day by day, and notebook is more and more comprehensive to the functional requirement of antenna, and frequency range develops to more hanging down direction.The scope that present LTE antenna has required to cover comprises 698MHZ-960MHZ, 1710MHZ-2700MHZ, and GPS1575MHZ etc., according to the basic principle of antenna, antenna volume requires also change accordingly.How to adapt to the ever-reduced frame height and the ever-increasing beamwidth of antenna, the development volume is littler, and the better 3D antenna of performance becomes the task of top priority.

Summary of the invention

The utility model is to the ubiquitous shortcoming of above-mentioned antenna, proposes a kind of better performances, has the multifrequency antenna of wide bandwidth.

The technical scheme of the utility model is following: a kind of multifrequency antenna, comprise printed circuit board (PCB) and be arranged on first branch's cabling, the second branch's cabling on the printed circuit board (PCB), first, second branch's cabling with the phase contact be the center respectively to the left and right level stretch out; Above printed circuit board (PCB) first branch's cabling, be provided with the first radiation metal shell fragment of walking line parallel with first branch, above second branch's cabling, be provided with second branch and walk the line parallel second radiation metal shell fragment; The said first radiation metal shell fragment and first branch's cabling side join, and the said second radiation metal shell fragment is through parasitic short-circuit line ground connection.

A kind of preferred version, said printed circuit board (PCB) lower limb is provided with metal clips, and described parasitic short-circuit line is through this metal clips ground connection.

A kind of preferred version, the said first radiation metal shell fragment, the second radiation metal shell fragment and metal clips are the metal clips that is welded on the printed circuit board (PCB).

A kind of preferred version, said first branch's cabling, second branch's cabling all connect radio circuit through coaxial cable.

A kind of preferred version, said antenna applications is on notebook computer.

A kind of preferred version, said antenna are arranged at notebook computer screen top, are connected in the ground end of notebook mainboard through copper-foil conducting electricity.

In sum, the utlity model has following significant beneficial effect:

(1) the application's multifrequency antenna has been introduced parasitic short-circuit line, has improved the bandwidth of high frequency antenna;

(2) the application has combined parasitic short-circuit line and metal clips cleverly, makes the bandwidth of antenna low-frequency range also be able to promote;

(3) the application can cover LTE, MIMO&WWAN, satisfies the requirement of LTE to antenna, and functional, and the experimental test result is shown in accompanying drawing 3, and at 705MHz-960MHz, 1710MHz-2700MHz has realized double resonance.

Description of drawings

Accompanying drawing 1 is the structural representation of the said multifrequency antenna of the utility model;

Accompanying drawing 2 is the said multifrequency antenna fundamental diagram of the utility model;

Accompanying drawing 3 is the said multifrequency antenna experimental test of the utility model figure as a result.

Embodiment

In order to let those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to set forth below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of multifrequency antenna comprises printed circuit board (PCB) 1 and is arranged on first branch's cabling 6, the second branch's cabling 7 on the printed circuit board (PCB) 1, first, second branch's cabling with the phase contact be the center respectively to the left and right level stretch out; Above printed circuit board (PCB) first branch's cabling, be provided with the first radiation metal shell fragment 2 of walking line parallel with first branch, above second branch's cabling, be provided with second branch and walk the line parallel second radiation metal shell fragment 3; The said first radiation metal shell fragment 2 and first branch's cabling side join, and the said second radiation metal shell fragment 3 is through parasitic short-circuit line 8 ground connection.Said printed circuit board (PCB) lower limb is provided with metal clips 4, and said parasitic short-circuit line 8 is through this metal clips ground connection.The said first radiation metal shell fragment 2, the second radiation metal shell fragment 3 and metal clips 4 are the metal clips that is welded on the printed circuit board (PCB).Said first branch's cabling 6, second branch's cabling 7 all connect radio circuit through coaxial cable.Said antenna applications is on notebook computer.Said antenna is arranged at notebook computer screen top, is connected in notebook mainboard ground through copper-foil conducting electricity 5.

Like Fig. 2; Multifrequency antenna also comprises notebook computer; Described notebook computer comprises notebook computer screen shell, notebook computer screen, and described printed circuit board (PCB) is arranged at the top of notebook computer screen shell, and described ground connection Copper Foil and notebook computer screen join.Multifrequency antenna also comprises radio circuit, and the other end of described radio circuit and feed-in assembly joins.Described feed-in assembly is 50 ohm coaxial cable of band IPEX head.

Antenna is positioned over the top edge of notebook screen shell, and antenna carries out feed through 50 ohm coaxial cable, and copper-foil conducting electricity is connected on the notebook computer screen.The coaxial wire heart yearn is connected respectively to two arms of different length, and (long branch line carries out feed with short branch line to antenna, and antenna can produce two resonance at low frequency and high frequency respectively.Be welded with the radiation shell fragment on the long branch line to increase the low frequency bandwidth, short branch line is coupled feed to parasitic short-circuit line with electromagnetic energy, combines with metal clips and will produce a resonance in low-frequency range, further increases the low frequency bandwidth.Antenna can form a circular current from feed end to ground short circuit toe-in bundle in addition, produces a resonance at front end.In addition, two apotypes of long branch line can produce a resonance and then improve high frequency bandwidth at front end.

The described multifrequency of the application is antenna frequently; The antenna frequency range covers the LTE/WWAN frequency range: 0MHZ), and GSM850/900 (824-960MHZ), GSM1800/1900/UMTS (1710-210MHZ); GSM850/900 (824-960MHZ), GSM1800/1900/UMTS (1710-2170MHZ).

Described antenna has been introduced parasitic short-circuit line, and its purpose is regulated antenna low frequency coupling as for increasing high frequency bandwidth.Described parasitic short-circuit line is connected with metal clips, and its purpose is to regulate antenna resonance length, produces a resonance at low frequency end.

Need to prove; Under the situation that does not deviate from the utility model spirit and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection range of the appended claim of the utility model.

Claims

1. a multifrequency antenna comprises printed circuit board (PCB) (1) and is arranged on first branch's cabling (6), the second branch's cabling (7) on the printed circuit board (PCB) (1), first, second branch's cabling with the phase contact be the center respectively to the left and right level stretch out; It is characterized in that, above printed circuit board (PCB) first branch's cabling, be provided with the first radiation metal shell fragment (2) of walking line parallel with first branch, above second branch's cabling, be provided with second branch and walk the line parallel second radiation metal shell fragment (3); The said first radiation metal shell fragment (2) joins with first branch's cabling side, and the said second radiation metal shell fragment (3) is through parasitic short-circuit line (8) ground connection.

2. multifrequency antenna according to claim 1 is characterized in that: said printed circuit board (PCB) lower limb is provided with metal clips (4), and parasitic short-circuit line (8) is through this metal clips ground connection.

3. multifrequency antenna according to claim 2 is characterized in that: the said first radiation metal shell fragment (2), the second radiation metal shell fragment (3) and metal clips (4) are the metal clips that is welded on the printed circuit board (PCB).

4. multifrequency antenna according to claim 1 is characterized in that: said first branch's cabling (6), second branch's cabling (7) all connect radio circuit through coaxial cable.

5. according to any described multifrequency antenna among the claim 1-4, it is characterized in that: said antenna applications is on notebook computer.

6. multifrequency antenna according to claim 5 is characterized in that: said antenna is arranged at notebook computer screen top, is connected in the ground end of notebook mainboard through copper-foil conducting electricity (5).