CN102856630A

CN102856630A - Compound antenna

Info

Publication number: CN102856630A
Application number: CN2011101878607A
Authority: CN
Inventors: 刘吉祥; 林永森
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2013-01-02

Abstract

The invention relates to a compound antenna which is applicable to a mobile device. The compound antenna comprises a main irradiator, an extending irradiator and a connector. The connector is coupled between the main irradiator and the extending irradiator so as to enable the main irradiator and the extending irradiator to resonate together to generate an operation frequency band. The compound antenna disclosed by the invention can effectively utilize fragmentary space, so that the long-standing problem that the design space for a low-frequency antenna is not enough is solved.

Description

Combined antenna

Technical field

The present invention relates to a kind of combined antenna, particularly a kind of combined antenna that is applicable to mobile device.

Background technology

An emphasis of Antenna Design is: around the aerial radiation body hardware can not be arranged.Close such as antenna and hardware, suitable spacing must be arranged, avoiding changing the radiation characteristic of antenna, but the design of electronic product and has been not easy sufficient space and spacing can be placed antenna take compact as main.

The at present design of the aerial radiation body of electronic product, large more options are put antenna without metallic region, take Apple iPad as example, it is the edge (without metallic region) that antenna is placed in Flat computer structure, and printed circuit board, liquid crystal display, central processing unit are put in the centre, and the element of fin etc. metal material.A lot of products are all because insufficient space causes the body of antenna too narrow and small, and causes the frequency range of antenna and efficient can't reach standard.Above problem will become more serious at the low-frequency band of antenna.

Summary of the invention

Combined antenna of the present invention can effectively utilize scrappy space, has solved for a long time problem of low-frequency antenna design space deficiency.

The invention provides a kind of combined antenna, be applicable to a mobile device, comprise a main radiator; One extends radiant body; And a connector, be coupled between above-mentioned main radiator and the above-mentioned extension radiant body, with producing one first operational frequency bands so that above-mentioned main radiator and above-mentioned extension radiant body resonate together.

Description of drawings

Fig. 1 is the schematic diagram that shows according to the described combined antenna of one embodiment of the invention;

Fig. 2 A, Fig. 2 B are the schematic diagrames that shows according to the described connector of one embodiment of the invention;

Fig. 3 A, Fig. 3 B are the schematic diagrames that shows according to the described extension radiant body of one embodiment of the invention;

Fig. 4 A, Fig. 4 B, Fig. 4 C are the schematic diagrames that shows according to the described combined antenna of another embodiment of the present invention;

Fig. 5 is the flow chart that shows according to the described commutation circuit of one embodiment of the invention.

And the description of reference numerals in the above-mentioned accompanying drawing is as follows:

100,400,410,420～combined antenna;

120～main radiator; 140～extension radiant body;

160～connector; 180～commutation circuit;

190～switch; 195～detector;

261～thimble; 262～metal clips;

310～soft board; 320～shell;

341～metal covering; 342～thunder carving radiant body;

A1～first signal; A2～secondary signal;

ES～electromagnetic signal; 500～flow chart;

S510, S520, S530～step.

Embodiment

Fig. 1 is the schematic diagram that shows according to the described combined antenna 100 of one embodiment of the invention.Combined antenna 100 can be arranged on the mobile device, and mobile device can be mobile phone (mobile phone), notebook computer (notebook), panel computer (tablet PC), and personal digital assistant (PDA) etc.As shown in Figure 1, combined antenna 100 can comprise: main radiator 120, extension radiant body 140, and connector 160.Main radiator 120, extension radiant body 140 are all metal and make, for example: copper.Connector 160 can be electrically connected to main radiator 120 and extend radiant body 140.Via connector 160, main radiator 120 and extend radiant body 140 and can resonate together and produce the first operational frequency bands than low frequency, for example: LTE (long term evolution, LTE) frequency band, its low-limit frequency is 704MHz.

If in the situation that does not have connector 160, main radiator 120 only can resonate separately, produces the second operational frequency bands of higher-frequency, and for example: 3G frequency band, its low-limit frequency are 824MHz.In conventional art, if want to make former the design can contain the LTE frequency band in the antenna of 3G frequency band, the low-frequency antenna design will be a maximum difficult problem.One embodiment of the invention is electrically connected different antenna radiators with connector, not only reduces the minimum operation frequency of antenna, can also effectively save the design space of antenna.

Fig. 2 A, Fig. 2 B are the schematic diagrames that shows according to the described connector of one embodiment of the invention.Shown in Fig. 2 A, connector 160 can be a thimble (pogo pin) 261, via the stretching, extension of contained spring, main radiator 120 is electrically connected to extension radiant body 140.In addition, shown in Fig. 2 B, connector 160 also can be a metal clips 262, utilizes the elasticity of shell fragment, main radiator 120 is electrically connected to extends radiant body 140.Although it should be noted that Fig. 2 A, Fig. 2 B only illustrate in the mode of thimble, metal clips implements connector 160, is not limited to this when in fact designing.

Fig. 3 A, Fig. 3 B are the schematic diagrames that shows according to the described extension radiant body of one embodiment of the invention.As shown in Figure 3A, extending radiant body 140 can be a metal covering 341, and it is arranged on the soft board (flexible print circuit, FPC) 310 of mobile device (not shown).In addition, shown in Fig. 3 B, extend radiant body 140 and also can be made by laser carved (laser engraving, laser direct structuring, LDS) technology, for example: thunder carving radiant body 342.Thunder carving radiant body 342 (for example: on the shell 320 intelligent mobile phone) can be arranged at mobile device.Although it is sinuous (meander) metal wire that Fig. 3 B only shows thunder carving radiant body 342, thunder carving radiant body 342 also can be the radiant body of other shapes, for example: circular, rectangle.

In sum, utilize the plasticity of soft board or laser carved technology, the present invention can effectively utilize space scrappy in the mobile device to design extension radiant body 140.Then, implement connector 160 in the mode of thimble, metal clips, main radiator 120 is electrically connected to extends radiant body 140, finish the low frequency design of combined antenna 100.

Fig. 4 A is the schematic diagram that shows according to the described combined antenna 400 of another embodiment of the present invention.Shown in Fig. 4 A, combined antenna 400 can comprise: main radiator 120, extension radiant body 140, connector 160, and commutation circuit 180.Commutation circuit 180 is electrically connected to main radiator 120 and connector 160, and determines whether switch according to first signal A1, secondary signal A2.

Fig. 4 B is the schematic diagram that shows described according to yet another embodiment of the invention combined antenna 410.Shown in 4B figure, combined antenna 410 also comprises switch 190, and the user can transmit first signal A1 or secondary signal A2 to commutation circuit 180 according to user demand and by switch 190.For example: when wish was used the LTE frequency band, the user can be by diverter switch 190 to produce first signal A1; And wish is when using the 3G frequency band, and the user can be by diverter switch 190 to produce secondary signal A2.

Fig. 4 C is the schematic diagram that shows according to the described combined antenna 420 of further embodiment of this invention.Shown in Fig. 4 C, combined antenna 410 also comprises detector 195, in order to determine whether to transmit first signal A1 or secondary signal A2 according to electromagnetic signal ES to commutation circuit 180.For example, mainly comprise the signal of LTE frequency band among near the electromagnetic signal ES detector 195 is judged, then produce first signal A1; And work as the signal that mainly comprises the 3G frequency band among near the electromagnetic signal ES of detector 195 judgements, then produce secondary signal A2.

Fig. 5 is the flow chart 500 that shows according to the described commutation circuit 180 of one embodiment of the invention.At first begin, at step S510, does commutation circuit 180 judge whether to receive first signal A1 or secondary signal A2? at step S520, if commutation circuit 180 receives first signal A1, then be electrically connected main radiator 120 and connector 160, make main radiator 120 and extend radiant body 140 first operational frequency bands of generation than low frequency that resonate together; And at step S530, if commutation circuit 180 receives secondary signal A2, then electrical isolation (electrically isolate) main radiator 120 and connector 160 make separately the second operational frequency bands of resonance generation higher-frequency of main radiator 120, and flow process finishes.Wherein, the first operational frequency bands can be the LTE frequency band, and low-limit frequency is 704MHz; And the second operational frequency bands can be the 3G frequency band, and low-limit frequency is 824MHz.Via commutation circuit 180, the user can select suitable radio band according to demand, has increased the operating flexibility of mobile device.

Though the present invention with preferred embodiment openly as above; so it is not to limit scope of the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the scope that the claim of enclosing defines.

Claims

1. a combined antenna is applicable to a mobile device, comprising:

One main radiator;

One extends radiant body; And

A connector is coupled between above-mentioned main radiator and the above-mentioned extension radiant body, with producing one first operational frequency bands so that above-mentioned main radiator and above-mentioned extension radiant body resonate together.

2. combined antenna as claimed in claim 1, wherein the low-limit frequency of above-mentioned the first operational frequency bands is 704MHz.

3. combined antenna as claimed in claim 1, wherein above-mentioned connector is a thimble.

4. combined antenna as claimed in claim 1, wherein above-mentioned connector is a metal clips.

5. combined antenna as claimed in claim 1, wherein above-mentioned extension radiant body is positioned on the soft board.

6. combined antenna as claimed in claim 1, wherein above-mentioned extension radiant body is to make with laser carved.

7. combined antenna as claimed in claim 1 also comprises:

One switches circuit, be coupled between above-mentioned main radiator and the above-mentioned connector, and in order to:

Judge whether to receive a first signal or a secondary signal;

In receiving above-mentioned first signal, be electrically connected above-mentioned main radiator and above-mentioned connector; And

In receiving above-mentioned secondary signal, the above-mentioned main radiator of electrical isolation and above-mentioned connector are with producing one second operational frequency bands so that above-mentioned main radiator resonates separately.

8. combined antenna as claimed in claim 7, wherein the low-limit frequency of above-mentioned the second operational frequency bands is 824MHz.

9. combined antenna as claimed in claim 7 also comprises:

Whether one switch produces above-mentioned first signal or above-mentioned secondary signal in order to input decision according to a user.

10. combined antenna as claimed in claim 7 also comprises:

One detector is in order to produce above-mentioned first signal or above-mentioned secondary signal according to an electromagnetic signal.