CN1983713B

CN1983713B - Multi-frequency antenna

Info

Publication number: CN1983713B
Application number: CN2005101231659A
Authority: CN
Inventors: 洪振达; 谷柏冈; 黄耀先
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2005-12-14
Filing date: 2005-12-14
Publication date: 2012-10-31
Anticipated expiration: 2025-12-14
Also published as: CN1983713A

Abstract

The invention is concerned with the multi-frequency antenna, including: the first antenna for wireless wide area network (WAN), the second antenna for wireless local area network, and the grounding part sharing by two antennas. The low-frequency part of the first antenna consists of the metal slice, model and aluminum foil, in order to increase the length and square of the radiant part, reduce the disturbance of the first antenna.

Description

Multifrequency antenna

[technical field]

The invention relates to a kind of multifrequency antenna, especially refer to a kind of multifrequency antenna that is used for electronic equipments such as notebook computer.

[background technology]

Along with the high speed development of mobile communication, the volume of various electronic products is more and more littler, and is also increasingly high to the requirement of its intraware.Because the development of radio network technique; Based on GPRS (General PackerRadio Service; GPRS) and increasing the applying in the notebook computer of wireless-access mode of WLAN (Wireless Local Area Network, WLAN).GPRS is the wireless network that a wide area covers, and its message transmission rate is probably at 30Kbps-50Kbps, and WLAN is a wireless network that the zone covers, and its message transmission rate can reach 11Mbps (based on the 802.11b technology).People cooperate portable terminal devices such as notebook computer through selecting the different radio network interface card, insert Internet whenever and wherever possible.Because the WLAN message transmission rate can reach 11Mbps; So (hotel, airport, coffee-house, commercial center, conference and exhibition center) provides public WLAN high-speed data service at some hot zones; Automatically switch after leaving hot zones, connect through maintenance networks such as GPRS.

In wireless communication procedure; Antenna is a requisite significant components; At some the portable terminal device of GPRS and WLAN bimodulus form network interface card is installed; Two antennas all can be equipped with, to adapt to the requirement of WLAN (Wireless Wide Area Network. wireless wide area network) and WLAN working frequency range respectively.Yet portable terminal devices such as notebook computer are attended by the requirement of miniaturization, so how two kinds of aerial integrations have just been become the problem of pendulum in face of the designer in limited space.In the prior art, with reference to shown in Figure 1, this multifrequency antenna 10 ' comprises first antenna 1 ' and second antenna 2 ' and third antenna 3 ' that is used for WLAN and the 4th antenna 4 ' that is used for wireless wide area network.This multifrequency antenna 10 ' is made and is formed by a sheet metal punching press, and wireless wide area network antenna and wireless lan antenna are together with each other.But two kinds of antennas of this antenna can influence each other, when two kinds of antennas too near the time can cause two antennas between isolate spend little and the entire antenna frequency range not enough, thereby remote-effects are to laser propagation effect.

[summary of the invention]

The object of the invention is to provide a kind of multifrequency antenna that not only can be operated in wireless wide area network but also can be operated in WLAN, and volume reduces than prior art, and two kinds of antennas on this antenna influence each other also as far as possible little.

To achieve these goals; The present invention adopts following technical scheme: a kind of multifrequency antenna comprises first antenna that is used for wireless wide area network; Be used for second antenna of WLAN and be the grounding parts that first antenna and second antenna are shared, first radiation arm that said first antenna has comprises sheet metal, is fixed on the plastic on the sheet metal and is fixed on the metal forming on the plastic.

Compared with prior art, multifrequency antenna of the present invention has following beneficial effect: reduced antenna volume, increased the frequency range and the antenna gain of wireless wide area network antenna, and reduced influencing each other of two antennas.

[description of drawings]

Fig. 1 is the stereogram of prior art multifrequency antenna.

Fig. 2 is the stereogram of multifrequency antenna of the present invention.

Fig. 3 is the stereogram of another angle of multifrequency antenna of the present invention.

Fig. 4 is the antenna body stereogram of multifrequency antenna of the present invention.

Fig. 5 is the multifrequency antenna of the present invention stereogram of an angle again.

Fig. 6 is the stereogram of the another angle of multifrequency antenna of the present invention.

[embodiment]

Please extremely shown in Figure 6 with reference to Fig. 2, it is the multifrequency antenna stereogram according to a kind of preferred embodiments of the present invention provided.This multifrequency antenna 1 is made up of with 113 of metal formings an antenna body 100 and the plastic 112 that is pasted on the antenna, and it comprises first antenna 2 that is used for wireless wide area network, is used for second antenna 3 of WLAN and the grounding parts 6 that two antennas are shared.Grounding parts 6 comprises first grounding parts 61 and the kink 62 that vertically extends.Plastic 112 is pasted on first antenna 2 with metal forming 113.This multifrequency antenna 1 is made by a sheet metal punching press, and wireless wide area network antenna and wireless lan antenna are together with each other.Metal forming 113 is aluminium foil in this execution mode.

First antenna 2 comprises first radiating element 10, first connecting portion 20 and grounding parts 6.First radiating element 10 comprises first Department of Radiation 11 and second Department of Radiation 12.First Department of Radiation 11 comprises that first radiation arm 101, second radiation arm, 102, the second Departments of Radiation 12 comprise second radiation arm 102, the 3rd radiation arm 103 and the 4th radiation arm 104.First radiation arm 101 comprise a sheet metal 111, be pasted on the plastic 112 on the sheet metal 111 and be pasted on sheet metal 111 and plastic 112 on aluminium foil 113.Plastic 112 is pasted with respect to the surface of first grounding parts with sheet metal 111; The one of which side and second antenna 3 are bonding, and the shape of plastic 112 and sheet metal 111 shapes are worked in coordination, and sheet metal is L-shaped; Promptly have a wider part 111a and a narrower part 111b; Plastic 112 is a cuboid, has a raised line 112 ' to engage with sheet metal 111 narrower part 111b on it, and raised line 112 ' and sheet metal 111 both and first grounding parts, 61 opposing surfaces are positioned on the same plane.Aluminium foil 113 is " ㄈ " shape, comprises a side 113b and the upper and lower surperficial 113a, the 113c that link to each other with side 113b, and its side 113b and lower surface 113c are pasted on the plastic 112, and upper surface 113a is pasted on the sheet metal 111 and electrically connects with sheet metal 111.The plane that makes plastic 112 be pasted with the lower surface 113c of aluminium foil 113 is bottom surface 112a, and then the lower surface 113c of aluminium foil 113 is than the bottom surface 112a narrow width of plastic 112, in order to avoid contact with second antenna 3.One sidewall 11a of first radiation arm 101 links to each other with second radiation arm 102.The 3rd radiation arm 103 of second Department of Radiation 12 and first radiation arm 101 are formed the first lengthwise metal arm 7; The 4th radiation arm 104 extends from the 3rd radiation arm 103 ends vertically downward; And the 3rd radiation arm 101 has triangle fluting 120 with respect to second radiation arm, 102 another sidewall 12b, changes the impedance matching of the shape adjustment antenna of lengthwise metal arm 7 by this.First Department of Radiation 11 of first antenna 2 is used for receiving or the emission lower frequency, and second Department of Radiation 12 is used for receiving or the emission upper frequency.

First connecting portion 20 comprises first linking arm 21 and second linking arm 22.First linking arm 21 is from second radiation arm, 102 vertical extent, and second linking arm 22 is from first linking arm, 21 vertical extent.Second radiation arm 102 and first connecting portion 20 are positioned at same plane, and simultaneously perpendicular to the first lengthwise sheet metal plane, 7 place and plane, the 4th radiation arm 104 place.First linking arm 21 and second radiation arm, 102 connecting places have one protruding 30.This convexity 30 is parallel to plane, the first lengthwise metal arm, 7 place perpendicular to plane, first connecting portion, 20 place, is used to connect the feeder line (not shown) of first antenna 2.Among other embodiment, protruding 30 position can change, thereby changes the radiation frequency of Department of Radiation.

Second antenna 3 comprises second radiating element 40, second connecting portion 50 and grounding parts 6.Second connecting portion 50 comprises the 3rd linking arm 51 and the 4th linking arm 52, and wherein the 4th linking arm 52 is perpendicular to the 3rd linking arm 51.Second radiating element 40 comprises the 3rd Department of Radiation 43, the 4th Department of Radiation 44 and the 5th Department of Radiation 45.The 3rd Department of Radiation 43 comprises one " Z " type metal arm 404 and comprises bent over arms 406 and the 5th radiation arm 405 from bent over arms 406, the four Departments of Radiation 44 that metal arm 404 vertically extends." Z " type metal arm 404 of the 3rd Department of Radiation 43 comprises first side arm 431, second side arm 432 and the 3rd side arm 433.Wherein first side arm 431 links to each other with the 5th radiation arm 405, and second side arm 432 extends from first side arm 431 vertically downward, and the 3rd side arm 433 is from second side arm, 432 vertical extent and parallel with first side arm 431.The 5th radiation arm 405 and first side arm 431 electrically connect and form the second lengthwise metal arm 8.Bent over arms 406 is extended from the 5th radiation arm 405 and first side arm, 431 junctions, and perpendicular to the second lengthwise metal arm 8.The 5th Department of Radiation 45 is perpendicular to bent over arms 406, and extends along being parallel to the 5th radiation arm 405 directions from bent over arms 406.The 5th Department of Radiation 45 and the 3rd linking arm 51 form the 3rd lengthwise metal arm 9.The second lengthwise metal arm 8 is parallel with the 3rd lengthwise metal arm 9 and fluting arranged between the two.There is a projection 70 the 5th Department of Radiation 45, bent over arms 406 and the 3rd linking arm 51 junctions, and this projection 70 is parallel to plane, the first lengthwise metal arm, 7 place perpendicular to plane, second connecting portion, 50 place, is used to connect the feeder line (not icon) of second antenna 3.In other embodiments, the position of projection 70 can change, thereby changes the emission or the receive frequency of Department of Radiation.The 3rd Department of Radiation 43 is used for emission or receives low radiation frequency, and the 4th Department of Radiation 44 is used for emission or receives higher radiation frequency, and the 5th Department of Radiation 45 is used to increase the frequency range of the 4th Department of Radiation 44.

First grounding parts 61 of grounding parts 6 is a metallic plate, and its two ends are extended first installation portion 4 and second installation portion, 5, the first installation portions 4 and second installation portion 5 respectively and formed a mounting plane.The end of first grounding parts 61 has one to fall " L " type raised line 63 with respect to the side of first installation portion 4, and raised line 63 comprises side arm 631 and parallel arms 632.The side arm 631 of raised line 63 is perpendicular to first grounding parts 61, and its parallel arms 632 is parallel to first grounding parts 61.Kink 62 1 ends link to each other with second linking arm 22 of first antenna 2, and the other end links to each other with the 4th linking arm 52 of second antenna 3.

The kink 62 of second radiation arm 102 of second antenna 3, first antenna 2 and first connecting portion 20, grounding parts 6 is positioned at same plane.The first lengthwise metal arm 7 is parallel with first grounding parts 61.

In the present embodiment; Sheet metal 111 with a plastic 112 and first antenna 2 is pasted; Because sheet metal 111 is different with the dielectric constant of plastic 112; Have Department of Radiation length shorter before more laminating 112 in the time of can making first Department of Radiation 11 of the antenna 2 of winning reach same radiation frequency, but can have influence on the emittance of antenna like this.Aluminium foil 113 is pasted on the plastic 112, aluminium foil 113 has changed radiation path again, has increased the length and the area of first Department of Radiation 11; Make that not increasing Department of Radiation length still can reach satisfactory radiation frequency; Because aluminium foil 113 is " ㄈ " shape, has therefore increased the radiation path of first antenna 2, thereby increased the frequency range of first antenna 2 simultaneously; Strengthen the emittance of first antenna 2, remedied the deficiency of only using plastic 112.Therefore this execution mode can shorten the length of Department of Radiation as far as possible at the radiation frequency that guarantees first antenna 2 under the enough frequency ranges and the situation of emittance, reduces the volume of first antenna 2.The 3rd Department of Radiation 43 of second antenna 3 is " Z " font, utilizes the bending design to reduce the relative length of this Department of Radiation.Therefore first Department of Radiation 11 (being used for low frequency radiation) that is operated in first antenna 2 of wireless wide area network passes through the utilization of plastic 112 and aluminium foil 113; The shaped design of the 3rd Department of Radiation 43 (being used for low frequency radiation) through Department of Radiation that is operated in second antenna 3 of WLAN makes both Department of Radiation length separately all shorten relatively; Open end is far away as far as possible between two liang of antennas, thereby effectively reduces interfering with each other of first antenna 2 and 3 receptions of second antenna and radiation.Certainly aluminium foil 113 also can be used other metal in other embodiments, for example Copper Foil etc.

Claims

1. multifrequency antenna; Comprise first antenna that is used for wireless wide area network; Be used for second antenna of WLAN and be the grounding parts that first antenna and second antenna are shared; It is characterized in that: said grounding parts comprise first grounding parts and the kink that vertically extends, first radiation arm that said first antenna has comprise sheet metal, be fixed on the plastic on the sheet metal and be fixed on sheet metal and plastic on metal forming, the end face of said plastic and sheet metal are with respect to the surface stickup of first grounding parts; One side and second antenna of said plastic are bonding; Plastic is the bottom surface with respect to the plane of first grounding parts, and the upper surface of said metal forming is pasted on the sheet metal and with sheet metal and electrically connects, and said metal forming does not contact with second antenna.

2. multifrequency antenna as claimed in claim 1 is characterized in that: said sheet metal is L-shaped, and it has a wider part and a narrower part.

3. multifrequency antenna as claimed in claim 2 is characterized in that: the shape of said plastic and sheet metal shape are worked in coordination; Plastic is a cuboid, has a raised line to engage with the narrower part of sheet metal on it, makes being positioned on the same plane with the opposing surface of first grounding parts of raised line and sheet metal.

4. multifrequency antenna as claimed in claim 1 is characterized in that: said metal forming is " ㄈ " shape, comprises side and upper and lower surface.

5. multifrequency antenna as claimed in claim 4; It is characterized in that: the lower surface of said metal forming is pasted on the bottom surface of plastic; Upper surface is pasted on the sheet metal and electrically connects with sheet metal, and the lower surface of metal forming is narrow than the bottom width of plastic, in order to avoid contact with second antenna.

6. multifrequency antenna as claimed in claim 1 is characterized in that: said first antenna comprises first radiating element and first connecting portion with first Department of Radiation and second Department of Radiation; Wherein first Department of Radiation comprises first radiation arm and second radiation arm, and second Department of Radiation comprises second radiation arm, the 3rd radiation arm and the 4th radiation arm.

7. multifrequency antenna as claimed in claim 6 is characterized in that: wherein said second antenna has one the 3rd Department of Radiation, and the 3rd Department of Radiation comprises one " Z " type metal arm.

8. multifrequency antenna as claimed in claim 7 is characterized in that: have one to fall " L " type raised line on wherein said first grounding parts, this raised line comprises a side arm and a parallel arms, and wherein side arm is perpendicular to first grounding parts, and parallel arms is parallel to first grounding parts.