CN101515666A

CN101515666A - Multi-frequency antenna

Info

Publication number: CN101515666A
Application number: CNA2008100185426A
Authority: CN
Inventors: 柯云龙; 谷柏冈; 洪振达
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: 2008-02-22
Filing date: 2008-02-22
Publication date: 2009-08-26

Abstract

The invention relates to a multi-frequency antenna, which comprises a grounding part, a connecting part, a first radiation part and a second radiation part. The grounding part is positioned on a first plane; the connecting part is L-shaped, is extended out from the grounding part and is positioned on the same plane as the grounding part; the first radiation part is extended from one position on the connecting part; and the second radiation part is extended from the other position on the connecting part. The tail end of the first radiation part and the tail end of the second radiation part are extended towards the same direction, so the structure of the multi-frequency antenna is miniaturized to a great extent.

Description

Multifrequency antenna

[technical field]

The present invention relates to a kind of multifrequency antenna, especially refer to a kind of multifrequency antenna that is used for mobile electronic equipment.

[background technology]

In the modern electronic equipment, the utilization wireless communication technology is carried out wireless transmission to data, sound, image etc. and is more and more used.Antenna as a kind of element in order to the induced electricity magnetic wave, is the device of employing wireless communication technology device necessity.

(Planar Inverted-F Antenna PIFA) is a kind of small size antenna that is usually used in mobile communication terminal to planar inverted " F " type antenna.Its characteristics are that size is little, and are in light weight, can effectively reduce occupation space and manufacturing cost, are easy to realize double frequency or multifrequency.It another very important characteristic is exactly that it has horizontal polarization and perpendicular polarization concurrently, is applicable to the place that electromagnetic environment is comparatively complicated.

The tw Taiwan patent announcement has disclosed a kind of planar inverted " F " type antenna for No. 563274, the grounding parts that it comprises Department of Radiation, be provided with at interval with Department of Radiation and be connected Department of Radiation and the conductive connecting pin of grounding parts.Department of Radiation comprises two radiation arms that extend round about.

Yet, two radiation arms of the antenna Department of Radiation of above-mentioned planar inverted " F " type extend round about, and the conductive connecting pin span is bigger, makes the length of entire antenna vertical and horizontal all bigger, and the electronic equipment that this antenna is installed need have bigger inner space this antenna is installed.Because modern electronic equipment trend miniaturization development, its inner space is more and more littler, and the space of leaving antenna for will be littler, and above-mentioned antenna is with the trend of incompatibility electronics miniaturization development.Therefore, we are necessary above-mentioned antenna is improved, to remedy above-mentioned defective.

[summary of the invention]

The object of the present invention is to provide the more multifrequency antenna of miniaturization of a kind of structure.

To achieve these goals, multifrequency antenna of the present invention is reached by the following technical programs:

A kind of multifrequency antenna, it comprises grounding parts, connecting portion, first Department of Radiation and second Department of Radiation.Grounding parts is positioned at one first plane; Connecting portion is the L type and extends from grounding parts, and is positioned at same plane with described grounding parts; First Department of Radiation one extends from the described connecting portion; Another extends second Department of Radiation from described connecting portion; Wherein, described first Department of Radiation is terminal extends in the same direction with the second Department of Radiation end.

Compared to prior art, multifrequency antenna of the present invention therefore to a great extent makes multiple frequency antenna structure more miniaturization because first Department of Radiation is terminal to be extended with the second Department of Radiation end in the same direction.

[description of drawings]

Fig. 1 is the stereogram of multifrequency antenna of the present invention.

Fig. 2 is another angle stereogram of Fig. 1.

Fig. 3 is the voltage standing wave ratio figure of multifrequency antenna of the present invention.

[embodiment]

Please refer to Fig. 1 to shown in Figure 2, it is the stereogram of preferred forms multifrequency antenna 100 of the present invention.In this embodiment, multifrequency antenna 100 is to be applied in the mobile electronic devices such as notebook computer, it is formed by sheet metal bending cutting, comprises the connecting portion 300 and the coaxial feeder 70 that are positioned at first plane and roughly rectangular grounding parts 40, are positioned at grounding parts 40 tops and first Department of Radiation 20, second Department of Radiation 21 that are provided with at interval with grounding parts 40, are connected first Department of Radiation 20, second Department of Radiation 21 and grounding parts 40.

In this embodiment, grounding parts 40 has at least one perforate 800.Because the restriction of the mobile electronic equipment inner space of multifrequency antenna 100 is installed, and grounding parts has a breach for 40 1 jiaos.Certainly, in other embodiments, grounding parts 40 can not have this breach.

First Department of Radiation 20 roughly be the L type and from the described connecting portion roughly the centre position extend, it comprises first 200 of extending perpendicular to connecting portion 300 and from first terminal second 201 of extending.In this embodiment, in order to adapt to the electronic equipment internal space, second 201 is bending a little, in other embodiments, and second 201 linearity and perpendicular to first 200.Second Department of Radiation 21 is the L type and another extends from described connecting portion 300, and it comprises the 3rd 210 of extending perpendicular to connecting portion 300 and from the 3rd 210 terminal vertically extending the 4th 211.Described second 201 end extends in the same direction with the 4th 211 ends.Be parallel to the 3rd 210 for first 200; Be parallel to the 4th 211 for second 201 in vertical direction.Have at least in first Department of Radiation 20 and second Department of Radiation 21 and have at least one perforate 800 on the Department of Radiation.First Department of Radiation 20 and second Department of Radiation 21 all are positioned at second plane, and this second plane is perpendicular to first plane.First Department of Radiation 20 works in the 2.4GHz frequency band, and this is the low-frequency range of multifrequency antenna 100 work; Second Department of Radiation 21 works in the 5GHz frequency band, and this is the high band of multifrequency antenna 100 work.

Connecting portion 300 is inverted L shape and is positioned at same plane with grounding parts 400.Connecting portion 300 comprises perpendicular to broad first limit 301 of grounding parts one side extension with from 301 terminal vertically extending long narrow second limits 302, first limit.Has a long narrow fluting between second limit 302 and the grounding parts 400.

Coaxial feeder 70 comprises inner wire 71, coats the inner insulating layer 72 of inner wire 71, coats the braided outer conductor 73 of inner insulating layer 72 and the external insulation layer 74 of coating outer conductor 73.Inner wire 71 is electrically connected at second limit 302 that is positioned at connecting portion 300 and the load point P of second Department of Radiation, 21 junctions.Outer conductor 73 is electrically connected at the earth point Q on the grounding parts.

Be positioned at perforate 800 on grounding parts 400, first Department of Radiation 20 and second Department of Radiation 21 so that multifrequency antenna 100 is fixed on the plastic fixtures (not shown) by hot melting way.By hot melting way, plastic fixtures can have tapping to protrude the plastics projection at multifrequency antenna, and the plastics projection and the antenna of hot melt can be combined closely, and multifrequency antenna is firmly secured on the plastic fixtures.

Please refer to shown in Figure 3ly, it is VSWR (voltage standing wave ratio) figure of first embodiment of the invention multifrequency antenna 100.As can be seen from Figure 3, but multifrequency antenna 100 operating frequencies are 2.1GHz-2.6GHz, 5.2MHz-5.8GHz.Above-mentioned frequency band has covered the working band of WLAN (wireless local area network).

Claims

1. multifrequency antenna, it comprises: grounding parts, connecting portion, first Department of Radiation and second Department of Radiation; Described grounding parts is positioned at one first plane; Described connecting portion is the L type and extends from grounding parts, and is positioned at same plane with described grounding parts; It is characterized in that: described first Department of Radiation one extends from the described connecting portion; Another extends described second Department of Radiation from described connecting portion; Wherein said first Department of Radiation is terminal to be extended in the same direction with the second Department of Radiation end.

2. multifrequency antenna as claimed in claim 1 is characterized in that: described grounding parts is provided with at least one perforate so that antenna can be fixed on the working of plastics by hot melting way.

3. multifrequency antenna as claimed in claim 2 is characterized in that: described first Department of Radiation and second Department of Radiation all roughly are the L type.

4. multifrequency antenna as claimed in claim 3 is characterized in that: described first Department of Radiation and second Department of Radiation all are positioned at one second plane.

5. multifrequency antenna as claimed in claim 4 is characterized in that: described second plane is perpendicular to described first plane.

6. multifrequency antenna as claimed in claim 1, it is characterized in that: described first Department of Radiation comprises first of extending perpendicular to connecting portion and from first terminal second of extending, and described second Department of Radiation comprises the 3rd of extending perpendicular to connecting portion and from the 3rd terminal the 4th of extending.

7. multifrequency antenna as claimed in claim 6 is characterized in that: described second is parallel to described the 4th.

8. multifrequency antenna as claimed in claim 6 is characterized in that: described first is parallel to described the 3rd.

9. multifrequency antenna as claimed in claim 1 is characterized in that: described first Department of Radiation and connecting portion junction are provided with load point.

10. multifrequency antenna as claimed in claim 1 is characterized in that: described first Department of Radiation is provided with perforate so that antenna can be fixed on the plastics retaining piece by hot melting way.