CN102468531A

CN102468531A - Multi-frequency antenna

Info

Publication number: CN102468531A
Application number: CN201010537478XA
Authority: CN
Inventors: 王俊元; 方启印
Original assignee: Quanta Computer Inc
Current assignee: Quanta Computer Inc
Priority date: 2010-11-04
Filing date: 2010-11-04
Publication date: 2012-05-23
Anticipated expiration: 2030-11-04
Also published as: CN102468531B

Abstract

The invention discloses a multi-frequency antenna, which comprises an insulating base plate, a main antenna and a metal sheet. The main antenna is arranged on the insulating base plate and comprises a feed-in part, a first conductor arm, a second conductor arm, a third conductor arm, a fourth conductor arm and a grounded part, wherein the feed-in part is used for supplying feed-in signals, the first conductor arm is connected with the feed-in part and is adjacent to a first side of the insulating base plate, the second conductor arm is connected with the feed-in part and is shorter than the first conductor arm, the third conductor is connected with the feed-in part and is used for transmitting radio frequency signals, the fourth conductor is extended along the edge of the third conductor arm and is coupled with the radio frequency signals, and the grounded part is adjacent to the feed-in part. The metal sheet is fixed on the first side of the insulating plate, is connected with the fourth conductor arm, is resonated and coupled with the first conductor arm to form a first radiation section, and also forms a second radiation section with the fourth conductor arm. Therefore, effects and purposes of an multi-frequency operation are achieved.

Description

Multifrequency antenna

Technical field

The present invention relates to a kind of multifrequency antenna, be meant a kind of multifrequency antenna that can be applicable to Long Term Evolution (LTE) especially.

Background technology

Long Term Evolution (Long Term Evolution is called for short LTE) technology is the mobile wireless wide frequency technology of new generation that gets most of the attention in the present field of wireless communication.So-called LTE is meant can be under the 20MHz frequency range; Reach downlink transfer speed 100Mbit/s, uplink speed 50Mbit/s, and compatible downwards; Support existing 3G system; It can let the service supplier through comparatively economic mode the radio wideband service is provided, and surmounts the usefulness of 3G wireless network now, brings more excellent performance.Because at present various countries to working frequency range (Operating Band) that LTE defined out shown in following table one; Need include 698-960MHz, 1710-2170MHz and 2500-2700MHz, the operable low frequency bandwidth of general PIFA antenna institute that so often is applied to notebook computer now also can't reach the requirement of LTE.

Therefore, how to conceive and a kind ofly can contain above-mentioned LTE frequency range and other comprises frequency ranges such as GSM850, EGSM900, PCS1800, DCS1900 and WCDMA2100, and have the antenna of enough operation frequency ranges, be emphasis of the present invention.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of multifrequency antenna that can contain a plurality of operation frequency ranges.

For achieving the above object, multifrequency antenna of the present invention comprises an insulated substrate, a main antenna and a sheet metal.Main antenna is located at a surface of insulated substrate, and comprises: a feeding portion, one first conductor arm, one second conductor arm, one the 3rd conductor arm, one the 4th conductor arm and a grounding parts.

Feeding portion supplies feed-in one radiofrequency signal; First conductor arm is connected with this feeding portion, and extends out to a second side adjacent with this first side of this insulated substrate along a first side of this insulated substrate; Second conductor arm is connected with this feeding portion, and adjacent with this first conductor arm and be shorter than this first conductor arm; The 3rd conductor arm is connected with this feeding portion, and extends towards the 3rd side opposite with this second side near this insulated substrate, to transmit this radiofrequency signal; The 4th conductor arm and the 3rd conductor arm extend with this radiofrequency signal that is coupled along the edge of the 3rd conductor arm at intervals, and extend to the four side opposite with this first side by the first side of this insulated substrate; Grounding parts is located at four side and contiguous this feeding portion of this insulated substrate.

Sheet metal is fixed on the first side of insulated substrate and is connected with the 4th conductor arm, and itself and first conductor arm resonate and are coupled and form one first radiant section jointly, and form one second radiant section jointly with the 4th conductor arm.

Preferably; For suitably adjusting the operation frequency range of second radiant section; This main antenna more comprises one the 5th conductor arm; It is positioned at not adjacent with the 3rd a conductor arm side of the 4th conductor arm, and extend to this insulated substrate the first side and with terminal connection of this sheet metal, and form this second radiant section jointly with the 4th conductor arm and this sheet metal.

Preferably, for suitably adjusting the operation frequency range of first radiant section, main antenna comprises that more one is located at the first side of this insulated substrate, and the extension that is connected with another end of this sheet metal, and it protrudes out towards this first conductor arm, to be coupled with this first conductor arm.

Preferably, main antenna more comprise one supply this first conductor arm and second conductor arm, one end to connect common sections and connect the lead of this common sections and this feeding portion, and the copper-foil conducting electricity that is connected with this grounding parts and the 4th conductor.

Effect of the present invention is to utilize first conductor arm and sheet metal resonance and coupling; Can produce the multi-modal requirement that is operated in low frequency and wideband (698-960MHz) that reaches; And produce a high frequency (1710-2170MHz) mode through sheet metal; And utilize the 3rd conductor arm and the 4th conductor arm to be coupled and adjust the high frequency coupling; Second conductor arm another more high frequency (2500-2700MHz) mode that then resonates out makes multifrequency antenna to include and comprises the LTE frequency range at interior a plurality of working frequency range, reaches effect of the present invention and purpose really.

Description of drawings

Fig. 1 is the constructing stereo sketch map of a preferred embodiment of multifrequency antenna of the present invention;

Fig. 2 is the direction of transfer sketch map of radiofrequency signal on first conductor arm, second conductor arm and the 3rd conductor arm of present embodiment multifrequency antenna;

Fig. 3 is the direction of transfer sketch map of radiofrequency signal on the 4th conductor arm, sheet metal and the 5th conductor arm of present embodiment multifrequency antenna;

Fig. 4 is the dimensional drawing of the multifrequency antenna of present embodiment;

Fig. 5 is that the present embodiment multifrequency antenna is arranged on the position view on the notebook computer;

Fig. 6 is voltage standing wave ratio (VSWR) measured result of present embodiment multifrequency antenna; And

Fig. 7 to Figure 12 is the radiation pattern figure of present embodiment multifrequency antenna under the different operating frequency.

The main element symbol description

100 multifrequency antennas

1 insulated substrate, 2 main antennas

3 sheet metals, 4 coaxial cables

5 notebook computers

10 surperficial 11 first sides

12 second sides 13 the 3rd side

14 four sides, 20 grooves

21 feeding portions, 22 first conductor arms

23 second conductor arms 24 the 3rd conductor arm

25 the 4th conductor arms, 26 grounding parts

27 extensions 28 the 5th conductor arm

29 copper-foil conducting electricities, 31 junctions

32 first sections 33 second sections

41 holding wires, 42 earth connections

51 lids, 201 common sections

202 leads

Embodiment

About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of following cooperation, can clearly appear with reference to a preferred embodiment of accompanying drawing.

Consulting shown in Figure 1ly, is a preferred embodiment of multifrequency antenna of the present invention, and present embodiment multifrequency antenna 100 comprises an insulated substrate 1, a main antenna 2 and a sheet metal (ironware) 3.

Insulated substrate 1 is a rectangle plate body, and it is of a size of 73.7 * 14 * 3mm ³

Main antenna 2 is located at a surface 10 of insulated substrate 1, and comprises a feeding portion 21, one first conductor arm 22, one second conductor arm 23, one the 3rd conductor arm 24, one the 4th conductor arm 25 and a grounding parts 26.

Feeding portion 21 probably is a rectangle, and it is positioned at the position that insulated substrate 1 central authorities take over, in order to be connected with feed-in one radiofrequency signal with the holding wire 41 of a coaxial cable 4.

First conductor arm 22 is connected with a common sections 201 with an end of second conductor arm 23, and common sections 201 is connected with feeding portion 21 via a lead 202, with feed-in radiofrequency signal to the first conductor arm 22 and second conductor arm 23, shown in the direction of arrow of Fig. 2.One first side 11 of first conductor arm 22 and insulated substrate 1 is abreast a second side 12 adjacent with first side 11 that extends to insulated substrate 1 along the first side 11 of insulated substrate 1 separately and probably.And the latter end of first conductor arm 22 is designed to 90 degree bendings.

Second conductor arm 23 and first conductor arm 22 adjacent (separately) and probably be abreast extends, and first conductor arm 22 is shorter than second conductor arm 23.

The 3rd conductor arm 24 is connected with feeding portion 21; Has a groove 20 between the two; And the 3rd conductor arm 24 is extended towards one three side 13 directions opposite with second side 12 of insulated substrate 1 by feeding portion 21, in order to transmit radiofrequency signal, shown in the direction of arrow of Fig. 2.

The 4th conductor arm 25 extends to the four side 14 opposite with first side 11 by the first side 11 of insulated substrate 11, and the edge of part next-door neighbour (pressing close to) the 3rd conductor arm 24 is with this radiofrequency signal that is coupled, shown in the direction of arrow of Fig. 3.

Grounding parts 26 is located at the four side 14 and the contiguous feeding portion 21 of insulated substrate 1, in order to be connected with the earth connection 42 of coaxial cable 4.

Sheet metal 3 probably is a strip; Itself and insulated substrate 1 probably are the first side 11 that is vertically fixed on insulated substrate 1; And be connected with an end of the 4th conductor arm 25, thus, shown in the direction of arrow of Fig. 3; Radiofrequency signal can be transmitted toward the two ends of sheet metal 3 by the 4th conductor arm 25 and sheet metal 3 junctions 31; First section 32 and adjacent first conductor arm, 22 generation resonance and couplings that sheet metal 3 is extended left by junction 31, and form one first radiant section jointly, and second section 33 and the 4th conductor arm 25 common one second radiant sections that form that sheet metal 3 is extended to the right by junction 32.

And length for adjustment first radiant section; Make it operate in a special frequency; First radiant section of present embodiment comprises that more one is located at the first side 11 of insulated substrate 1 and the extension 27 that is connected with first section 32 end of sheet metal 3; Its end towards first conductor arm 22 protrudes out, so that be coupled with first conductor arm 22.And in order to adjust the length of second radiant section; Make it operate in a special frequency; Second radiant section of present embodiment more comprises one the 5th conductor arm 28; It is located at not adjacent with the 3rd conductor arm 24 side of the 4th conductor arm 25, and the 5th conductor arm 28 probably is parallel with the 4th conductor arm 25, and second period 33 terminal connection of one of which end and sheet metal 3.

In the present embodiment; The total length of first radiant section is greater than second radiant section 26; And the total length of second radiant section is greater than second conductor arm 23; And the total length of first radiant section design can make first radiant section resonate in the first frequency range 698-960MHz, and the second frequency range 1710-2170MHz that the design of the total length of second radiant section can make second radiant section resonate and be higher than first frequency range in; And the Design of length of second conductor arm 23, the 3rd frequency range 2500-2700MHz that can make second conductor arm 23 resonate and be higher than second frequency range in one.The overall dimensions of present embodiment multifrequency antenna 100 is 73.7 * 14 * 3mm ³, the detailed dimensions of main antenna 2 and sheet metal 3 (unit: mm) referring to shown in Figure 4.

Moreover in order to increase the contact area of antenna, present embodiment can be provided with a copper-foil conducting electricity 29 more in addition and be connected with grounding parts 26 and the 4th conductor arm 25 respectively.

As shown in Figure 5, the multifrequency antenna 100 of present embodiment is set on the lid 51 of a notebook computer 5 usually, is positioned at the side of display top.

As shown in Figure 6; It is voltage standing wave ratio (VSWR) measured result of the multifrequency antenna 100 of present embodiment; By seeing among Fig. 6 that the voltage standing wave(VSW) ratio (VSWR) of multifrequency antenna 100 in operation frequency range 698-960MHz, 2170-2700MHz and 2500-2700MHz all less than 3, meets the requirement of industry for antenna radiation efficiency.

Seeing table 2 and table 3, is total radiant power (Tot.Rad.Pwr.) and the radiation efficiency percentage (Efficiency%) of multifrequency antenna 100 under each frequency of operation (Frequency) of present embodiment.

Table two table three

Referring to Fig. 7 to Figure 12, be the radiation pattern figure of multifrequency antenna 100 under the different operating frequency of present embodiment, show by each figure and can know that the radiation pattern of multifrequency antenna 100 has good omni-directional.

In sum; The multifrequency antenna 100 of present embodiment utilizes two low frequency paths; I.e. first section 32 resonance of first conductor arm 22 and sheet metal 3 also is coupled; And produce the multi-modal requirement that is operated in low frequency and wideband (698-960MHz) that reaches, and pass through second section 33 generation one high frequency (1710-2170MHz) mode of sheet metal, and utilize the

3rd conductor arm

24 and 25 couplings of the 4th conductor arm to adjust the high frequency coupling; Second conductor arm 23 another more high frequency (2500-2700MHz) mode that then resonates out; Make the working frequency range of multifrequency antenna 100 except comprising GSM850, EGSM900, PCS1800, DCS1900 and WCDMA2100 frequency range, also included working frequency range 698-798MHz and the 2500-2700MHz of LTE, reach effect of the present invention and purpose really.

Above-describedly be merely preferred embodiment of the present invention, can not limit the scope that the present invention implements with this, the simple equivalent of promptly doing according to claim of the present invention and invention description generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.

Claims

1. multifrequency antenna comprises:

Insulated substrate;

Main antenna, be located at a surface of this insulated substrate, and comprise:

Feeding portion supplies feed-in one radiofrequency signal;

First conductor arm is connected with this feeding portion, and extends out to a second side adjacent with this first side of this insulated substrate along a first side of this insulated substrate;

Second conductor arm is connected with this feeding portion, and adjacent with this first conductor arm and be shorter than this first conductor arm;

The 3rd conductor arm is connected with this feeding portion, and extends towards the 3rd side opposite with this second side near this insulated substrate, to transmit this radiofrequency signal;

The 4th conductor arm extends with this radiofrequency signal that is coupled along the edge of the 3rd conductor arm at intervals with the 3rd conductor arm, and extends to the four side opposite with this first side by the first side of this insulated substrate; And

Grounding parts is located at the four side of this insulated substrate and is close to this feeding portion; And

Sheet metal is fixed on the first side of this insulated substrate and is connected with the 4th conductor arm, itself and this first conductor arm resonance and coupling and form one first radiant section jointly, and with common one second radiant section that forms of the 4th conductor arm.

2. according to the described multifrequency antenna of claim 1; Wherein this main antenna also comprises the 5th conductor arm; It is positioned at not adjacent with the 3rd a conductor arm side of the 4th conductor arm; And extend to this insulated substrate the first side and with terminal connection of this sheet metal, and form this second radiant section jointly with the 4th conductor arm and this sheet metal.

3. according to the described multifrequency antenna of claim 1, wherein this main antenna comprises that also one is located at the first side of this insulated substrate, and the extension that is connected with another end of this sheet metal, and it protrudes out towards this first conductor arm, to be coupled with this first conductor arm.

4. according to claim 1,2 or 3 described multifrequency antennas, wherein this main antenna comprises that also one supplies the common sections of this first conductor arm and the connection of second conductor arm, one end and the lead of this common sections of connection and this feeding portion.

5. according to the described multifrequency antenna of claim 4, wherein this main antenna also comprises the copper-foil conducting electricity that is connected with this grounding parts and the 4th conductor.

6. according to the described multifrequency antenna of claim 4, also comprise a coaxial cable, the holding wire of this coaxial cable is connected with this feeding portion, and the earth connection of this coaxial cable is connected with this grounding parts.

7. according to the described multifrequency antenna of claim 4; Wherein this first radiant section can resonate in one first frequency range; Second frequency range that this second radiant section can resonate and be higher than this first frequency range in one, and this second conductor arm the 3rd frequency range that can resonate and be higher than this second frequency range in one.

8. according to the described multifrequency antenna of claim 7, wherein this first frequency range comprises 698-960MHz, this second frequency range comprises 1710-2170MHz, and the 3rd frequency range comprises 2500-2700MHz.