CN1925218A

CN1925218A - Multiple frequency antanna

Info

Publication number: CN1925218A
Application number: CNA2005100942210A
Authority: CN
Inventors: 戴隆盛; 谷柏冈; 洪振达; 柯云龙; 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: 2005-08-31
Filing date: 2005-08-31
Publication date: 2007-03-07
Anticipated expiration: 2025-08-31
Also published as: CN1925218B

Abstract

This invention discloses one multi-frequency antenna used in pad computer, which comprises irradiation part, earth part and connection part, wherein, the said irradiation part comprises first part in 900MHz band and second irradiation part in1800MHz band on different planes and the said earth part comprises host part and down extension part.

Description

Multifrequency antenna

[technical field]

The invention relates to a kind of antenna, refer in particular to a kind of multifrequency antenna that is applied in the mobile electronic equipments such as notebook computer.

[background technology]

Along with making rapid progress of modern communication technology, increasing mobile electronic equipment such as notebook computer etc. all are equipped with antenna, so that it can insert a wireless lan (wlan) job.At present, WLAN (wireless local area network) is mostly based on bluetooth (Bluetooth) technical standard or IEEE802.11 series standard.The working band of antenna falls within 2.4GHz in the Bluetooth technology standard, and the working band of antenna falls within 2.4GHz and 5GHz respectively in the IEEE802.11 series technique standard.Therefore, the antenna in the present notebook computer is the antenna that is applied to above-mentioned frequency band mostly.

Yet, following mobile electronic equipment will be not content with and only insert one and can not move that (the signal maximum transmission distance has only 10 meters in the Bluetooth technology, the electronic equipment that allow to insert this system hardly moves) or the WLAN (wireless local area network) of moving range very little (signal transmission ultimate range also has only 150 meters in the IEEE802.11 series standard, only limits to moving between the office).It is the target that pursue the communications field that mobile electronic equipment is inserted wireless wide area network (WWAN).The mobile electronic equipment that inserts WWAN can wider mobile office, amusement.The WWAN in the whole world mainly adopts two big technology at present---and be respectively GSM and CDMA technology.And to make mobile electronic equipment such as notebook computer can insert the GSM network, the antenna of using in the notebook computer just must be able to work in the frequency band of GSM network work, i.e. 900/1800MHz.Yet at present the antenna of laptop computer applications works in 2.4GHz and 5GHz frequency band mostly, and the used antenna of mobile phone that can insert the GSM network is unsuitable for placing notebook computer because of factors such as size or power mostly.Chinese patent is announced CN2689482Y number and has been disclosed a kind of three frequency inverse-F antennas, this antenna has three Departments of Radiation, it works in 1800MHz, 900MHz and 2450MHz frequency band respectively, can insert in the electronic equipments such as notebook computer so that it can insert the GSM network work.Yet above-mentioned inverse-F antenna takes up space bigger, the trend of incompatibility antenna miniaturization development, and be unsuitable for conveniently being installed in the notebook computer working.

Therefore, be necessary such antenna is improved, to address the aforementioned drawbacks.

[summary of the invention]

The object of the present invention is to provide a kind of size less and be easy to be installed on multifrequency antenna in the electronic equipment such as notebook computer.

For achieving the above object, the present invention adopts following technical scheme: multifrequency antenna of the present invention is to be applied in the mobile electronic equipments such as notebook computer, it comprises Department of Radiation, grounding parts and the connecting portion that connects Department of Radiation and grounding parts, described Department of Radiation comprises first Department of Radiation and second Department of Radiation that works in 1800MHz the frequency band that is centre frequency that works in 900MHz the frequency band that is centre frequency, described first Department of Radiation, second Department of Radiation and grounding parts have at least two to be positioned at Different Plane, described first Department of Radiation, at least two are positioned at Different Plane in second Department of Radiation and the grounding parts, the shared one section shared radiation arm of first Department of Radiation and second Department of Radiation, and this shared radiation arm is positioned at multifrequency antenna at the contiguous corner of an end of described longitudinally, first Department of Radiation also comprises first radiation arm that is connected with shared radiation arm, second Department of Radiation also comprises second radiation arm that is connected with described shared radiation arm, and first radiation arm and described second radiation arm end all extend to the other end of described longitudinally.

Compared with prior art, multifrequency antenna of the present invention takes up space less, is adapted to the trend of antenna miniaturization development, and multifrequency antenna of the present invention is fit to and is easily installed in the electronic equipment such as notebook computer.

[description of drawings]

Fig. 1 is the three-dimensional view of multifrequency antenna of the present invention.

Fig. 2 is the three-dimensional view of another angle of multifrequency antenna of the present invention.

Fig. 3 is the front view (feeder line is not installed) of multifrequency antenna of the present invention shown in Figure 1.

Fig. 4 is the rearview (feeder line is not installed) of multifrequency antenna of the present invention shown in Figure 1.

Fig. 5 is the electromagnetic radiation field pattern of multifrequency antenna of the present invention X-Y horizontal polarization when being operated in the 900MHz frequency.

Fig. 6 is the electromagnetic radiation field pattern of multifrequency antenna of the present invention X-Y perpendicular polarization when being operated in the 900MHz frequency.

Fig. 7 is the electromagnetic radiation field pattern of multifrequency antenna of the present invention X-Y horizontal polarization when being operated in the 1800MHz frequency.

Fig. 8 is the electromagnetic radiation field pattern of multifrequency antenna of the present invention X-Y perpendicular polarization when being operated in the 1800MHz frequency.

Fig. 9 is voltage standing wave ratio (Voltage Standing Wave Radio, the VSWR) resolution chart of multifrequency antenna of the present invention.

[embodiment]

See also Fig. 1 to shown in Figure 4, multifrequency antenna 1 of the present invention is based on the improvement of planar inverted F-shape antenna, it is assembled in the electronic equipment such as notebook computer in order to receive or to transmit, in the present embodiment, multifrequency antenna of the present invention is reversed F-typed dual-band antenna, it roughly is the lengthwise configuration at longitudinally, and is made by metal plate, and this electronic equipment is notebook computer (not shown) in the present embodiment.Multifrequency antenna 1 comprises Department of Radiation 2, grounding parts 4, feedback point 5 and connects the connecting portion 3 of Department of Radiation 2 and grounding parts 4.

Department of Radiation 2 comprises that first Department of Radiation 21 reaches second Department of Radiation 22 that is positioned at Different Plane with first Department of Radiation 21, and wherein, first Department of Radiation 21 is low frequency radiation portions, and second Department of Radiation 22 is high-frequency radiation part.First Department of Radiation 21 comprises shared radiation arm 20 and comprises shared radiation arm 20 and second radiation arm 220 that extends from shared radiation arm 20 from first radiation arm, 210, the second Departments of Radiation 22 that shared radiation arm 20 extends.Described first radiation arm 210 and second radiation arm 220 are terminal has rationally utilized the locus all to the end extension of described longitudinally, has reduced the occupied space of multifrequency antenna 1.

Grounding parts 4 comprises the extension 41 that rectangular body portion 40 and autonomous body 40 1 sides are extended perpendicular to main part 40 downwards.The extension 411 that extension 41 has the vertical component effect 410 that links to each other with main part 40 and extends to an end of longitudinally from vertical component effect 410 and main part 40 junctions.Connecting portion 3 is positioned at same plane with main part 40 and autonomous body 40 another examples are extended along equidirectional with extension 411.Be formed with a slit 6 between connecting portion 3 and the extension 411.

Feedback point 5 is located at shared radiation arm 20 and connecting portion 3 junctions.The electrical path length that the electrical path length that the free terminal of first Department of Radiation 21 and feedback point are 5 is put 5 than the free terminal and the feedback of second Department of Radiation 22 is long, and longer than the length of multifrequency antenna 1 on longitudinally.

Shared radiation arm 20 is positioned at the contiguous corner of the other end of described longitudinally, it comprise is connected with connecting portion 3 and along first side 201 that connecting portion 3 bearing of trends extend, and first side 201 is positioned at same plane and perpendicular to 201 outward extending second sides 202, first side with perpendicular to second side 202 upwardly extending the 3rd sides 203.First radiation arm 210 extends from the main part 40 place directions of the 3rd side 203 terminal side direction grounding parts 4.Second radiation arm 220 comprises first side arm 221 that extends with first radiation arm, 210 rightabouts from the 3rd side 203 terminal opposite sides edges, from upwardly extending second side arm 222 of first side arm, 221 upper end, from second side arm, 222 ends perpendicular to second side arm 222 and the main part 40 that is parallel to grounding parts 4 to the 3rd side arm 223 that extends near extension 41 directions of grounding parts 4 and from the 3rd side arm 223 ends perpendicular to the 3rd side arm 223 and the main part 40 that is parallel to grounding parts 4 to the 4th side arm 224 that extends near main part 40 directions.First Department of Radiation 21 constitutes first width of cloth antenna with connecting portion 3, grounding parts 4, is used for receiving or the emission low frequency signals, and it works in 900MHz frequency band (is centre frequency with 900MHz); Second Department of Radiation 22 constitutes second width of cloth antenna with connecting portion 3, grounding parts 4, is used for receiving or the emission higher frequency signals, and it works in 1800MHz frequency band (is centre frequency with 1800MHz).

The width by regulating slit 6 and the position of feedback point 5 can make the HFS of second Department of Radiation 22 reach the emission band of broad and radiation effect preferably.

Feeder line 6 is connected from 5 extensions of feedback point and with the extension 41 of grounding parts 4.Feeder line 6 comprises inner wire 61, the inner insulating layer 63 that coats inner wire 61 that is welded in feedback point 5, the insulating outer layer 63 that is welded in the wire sheathing 62 and the clad metal braid 62 of grounding parts 4.

Multifrequency antenna 1 global shape of the present invention is in conjunction with electronic equipment internal structural designs such as notebook computers, first Department of Radiation 21, second Department of Radiation 22, grounding parts 4 lay respectively at Different Plane, and the plane, main part 40 place of the first Department of Radiation plane, 21 place and grounding parts 4 is perpendicular, and second Department of Radiation, 22 planes, terminal place and plane, first Department of Radiation, 21 place are perpendicular.In three-dimensional scope, dwindled the occupied space of multifrequency antenna 1 as far as possible, so multifrequency antenna of the present invention 1 is fit to and is easily installed in electronic equipment internal such as notebook computer.

Fig. 5 packs into to the present invention of being shown in Figure 8 after the notebook computer, when operating frequency is 900MHz and 1800MHz respectively and level on the X-Y plane and perpendicular polarization electromagnetic radiation field pattern, by test result as can be known, the average gain of multifrequency antenna 1 all can meet the demands under two kinds of operating frequencies.

See also shown in Figure 9, the voltage standing wave(VSW) ratio of multifrequency antenna 1 of the present invention is working between 880-940MHz and the 1620-2180MHz all less than 2, showing promptly that multifrequency antenna 1 of the present invention has both can be operated in higher frequency band and also can be operated in lower frequency band and cover the low-frequency range (880-960MHz) of GSM network substantially and cover the high band (1710-1880MHz) of GSM network fully, can realize wide band characteristic when being operated in higher frequency band simultaneously.

Claims

1. multifrequency antenna, be applied in the mobile electronic equipment, it comprises Department of Radiation, grounding parts and the connecting portion that connects Department of Radiation and grounding parts, it is characterized in that: described Department of Radiation comprises first Department of Radiation that works in the 900MHz frequency band and second Department of Radiation that works in the 1800MHz frequency band, and described first Department of Radiation, second Department of Radiation and grounding parts are positioned at Different Plane respectively.

2. multifrequency antenna as claimed in claim 1, it is characterized in that: described grounding parts comprises the extension that rectangular body portion and autonomous body one side are extended perpendicular to main part downwards, and described extension has vertical component effect that links to each other with main part and the extension that extends from vertical component effect.

3. multifrequency antenna as claimed in claim 2 is characterized in that: the main body section of described connecting portion and grounding parts in same plane and autonomous body opposite side and described extension extend along equidirectional.

4. multifrequency antenna as claimed in claim 1 is characterized in that: described first Department of Radiation and second Department of Radiation have shared shared radiation arm.

5. multifrequency antenna as claimed in claim 4 is characterized in that: described shared radiation arm comprises and is connected with connecting portion and is positioned at same plane along first side that the connecting portion bearing of trend extends, with the first side and perpendicular to outward extending second side, first side with perpendicular to upwardly extending the 3rd side in second side.

6. multifrequency antenna as claimed in claim 5 is characterized in that: described first Department of Radiation also comprises first radiation arm, and its main part place direction from the terminal side direction grounding parts of the 3rd side is extended.

7. multifrequency antenna as claimed in claim 5, it is characterized in that: described second Department of Radiation also comprises second radiation arm, and this second radiation arm has first side arm that extends with the first radiation arm rightabout from the terminal opposite side of the 3rd side edge, from upwardly extending second side arm of the first side arm upper end, from the second side arm end perpendicular to second side arm and the main part that is parallel to grounding parts to the 3rd side arm that extends near the extension direction of grounding parts and from the 3rd side arm end perpendicular to the 3rd side and the main part that is parallel to grounding parts to the 4th side arm that extends near the main part direction.

8. multifrequency antenna as claimed in claim 3 is characterized in that: be formed with slit between described connecting portion and the described extension.

9. multifrequency antenna, it roughly is the lengthwise configuration at longitudinally, and make by metal plate, it comprises Department of Radiation, grounding parts and the connecting portion that is connected grounding parts and Department of Radiation, described Department of Radiation comprises first Department of Radiation that works in relative low-frequency band and second Department of Radiation that works in the relative high frequency frequency band, it is characterized in that: described first Department of Radiation, at least two are positioned at Different Plane in second Department of Radiation and the grounding parts, the shared one section shared radiation arm of first Department of Radiation and second Department of Radiation, and this shared radiation arm is positioned at described antenna in the contiguous corner of an end of described longitudinally, first Department of Radiation also comprises first radiation arm that is connected with shared radiation arm, second Department of Radiation also comprises second radiation arm that is connected with described shared radiation arm, and described first radiation arm and described second radiation arm end all extend to the other end of described longitudinally.

10. multifrequency antenna as claimed in claim 9, it is characterized in that: the electrical path length between the free terminal of described first Department of Radiation and feedback point is longer than the free terminal and the electrical path length between the feedback point of second Department of Radiation, and longer than the length of described multifrequency antenna on longitudinally.