CN2560106Y

CN2560106Y - Sheet antenna

Info

Publication number: CN2560106Y
Application number: CN02241259U
Authority: CN
Inventors: 张秀如
Original assignee: Ares Communications Tech Inc
Current assignee: Ares Communications Tech Inc
Priority date: 2002-07-05
Filing date: 2002-07-05
Publication date: 2003-07-09
Anticipated expiration: 2012-07-05

Abstract

The utility model provides a sheet antenna, which is provided with two arc-shaped sheet bodies extending from one edge of an antenna body to be respectively used as a signal feed-in end and a grounding end, and a groove is formed on the antenna body to divide the whole antenna body into two operation paths, and the terminal of each operation path forms a sharp angle structure to be used as a resonance end, wherein, the edge of the antenna body on the two operation paths and the turning part which is not the resonance end form an arc-shaped structure to avoid partial electric wave signals radiating out under the resonance frequency which is not set; the utility model has the advantages of high radiation efficiency and low power consumption.

Description

Chip aerial

Technical field

The utility model is relevant a kind of antenna structure, particularly about a kind of concealed antenna that is applied to dual-band mobile phone.

Background technology

Now almost in the society of staff one machine, people no longer regard mobile phone as means of communication merely, exterior design is outstanding, the mobile phone of fashion becomes the favorite on the consumption market gradually, and the outstanding antenna for mobile phone of tradition designs for having become a kind of puzzlement on the exterior design of mobile phone, make tool concealed antenna design mobile phone in response to and give birth to, because concealed antenna is the overhanging antenna of script to be moved down be hidden in the handset, can make the mobile phone exterior design have more elasticity.

And the general now concealed antenna that adopts is a kind of reversed F-typed plate aerial (PlanarInverted F Antenna, PIFA), as shown in Figure 1, it is the groove that forms a tool many places bending structure in the form of sheets an antenna body, antenna body is divided into two kinds of different courses of action, and the length of each courses of action is 1/4th of emission of antenna institute desire and the operative wavelength that receives, can receive and dispatch the electric wave signal of two kinds of frequency of operation such as 900MHz and 1800MHz so that make antenna body have two kinds of current paths, and a signal feed side and an earth terminal have been extended at an edge of antenna body, the two is to be a Contraband matrix body, for directly and the PCB circuit board (not shown) of mobile phone inside weld together and as the emission and the receiving terminal of electric wave signal.

Yet in this kind handset structure, as shown in the figure, because groove is to be a right angle when bending, obtuse angle or acute angle-shaped etc. has the bending structure of wedge angle, the design that this kind has a plurality of discontinuity surfaces will make electric wave produce a plurality of non-default current paths easily, as shown in FIG., each arrow is promptly represented a current path, and then on these discontinuity surfaces, produce other non-default resonance frequencys, and electric wave will promptly be radiate under non-frequency for 900MHz or 1800MHz, and then reduce the amount of radiation of electric wave under 900MHz and 1800MHz, and have a strong impact on the reception quality of antenna; In the case, if desire to make the reception quality of mobile phone to maintain under the good situation, then must use high-power current strength, and have the disappearance of power consumption.

Summary of the invention

The utility model is promptly according to above-mentioned puzzlement, and proposes a kind of chip aerial structure that has high radiation efficiency under the frequency that sets.

Main purpose of the present utility model is to propose a kind of chip aerial, the wave radiation amount is concentrated under the resonance frequency that sets radiate, to have the advantage of high radiation efficiency.

Another purpose of the present utility model is to propose a kind of chip aerial, makes it use the current strength of lower-wattage can reach antenna desired transmitting-receiving quality and effect, to have the advantage of low power consumption.

According to the utility model, one sheet antenna package is drawn together an antenna body, the one edge has extended two arc lamellar bodies, with respectively as a signal feed side and an earth terminal, and have a channel shaped to be formed on the body, and with antenna body two courses of action of dividing into that one is long and the other is short, and the terminal of each courses of action forms a wedge angle discontinuous construction with the resonance end as electric wave, wherein, at the antenna body edge and non-turning point for resonance end form an arc structure.

Description of drawings

Fig. 1 is known a kind of chip aerial structural representation;

Fig. 2 is a structural representation of the present utility model.

The figure number explanation:

10 antennas, 12 antenna bodies

14 grooves, 16 bending structures

18 courses of action, 20 signal feed sides

22 earth terminals

30 chip aerials, 32 antenna bodies

34 signal feed sides, 36 earth terminals

38 grooves, 40 first courses of action

42 second courses of action, 44 first resonance ends

46 second resonance ends, 48 arc structures

Embodiment

As shown in Figure 2, a sheet antenna 30 comprises an antenna body 32, is a rectangular tab, and an edge appropriate location of antenna body 32 has extended two arc lamellar bodies respectively downwards, with respectively as a signal feed side 34 and an earth terminal 36; And there is a groove 38 to be formed on the antenna body 32, and utilize signal feed side 34 entire antenna body 32 to be divided into two courses of action for datum mark, it is to be respectively first courses of action 40 and second courses of action 42, each courses of action 40,42 length is 1/4th of emission of antenna institute desire and the operative wavelength that receives, and first, second courses of action 40,42 terminal is to form a horn structure, it is to be the first resonance end, 44 and 1 second resonance end 46, make first, second courses of action 40, electric wave signal on 42 is in resonance end 44,46 produce resonance, in order to emission and reception electric wave signal, wherein, first, second courses of action 40, the edge of the antenna body 32 on 42 and remove resonance end 44, all turning points outside 46 all form an arc structure 48.

Wherein, above-mentioned first courses of action 40 and second courses of action 42 are the designs for one is long and the other is short, and the first resonance end, 44 resonance frequencys that produced of the first long courses of action 40 are to meet the 900MHz communication band that general mobile phone adopts, its current path is shown in the long dotted line among the figure, the second resonance end, 46 resonance frequencys that produced of second courses of action 42 then meet 1800MHz communication frequency range, its current path is shown in the short dash line among the figure, so that reach the function of double frequency transmitting-receiving; And this chip aerial 30 is that this signal feed side 34 and earth terminal 36 are welded on the circuit board (not shown) when being installed in mobile phone inside, so as to receiving under the frequency band of 1800MHz and 900MHz and the emission electric wave signal.

In the utility model, because groove 38 is when being formed at antenna body 32, except making on the antenna body 32 as resonance end 44,46 edge is outside the horn structure, on the turning point at antenna body 32 other edges, all form an arc structure 48, the design that this kind turning point is continuous face makes the electric wave signal be difficult for producing other non-default resonance frequencys, can avoid part electric wave signal under non-frequency, promptly to radiate for 900MHz or 1800MHz, and then complete wave radiation amount is concentrated under the resonance frequency that sets just radiate, so that improve the communication quality of mobile phone; Because amount of radiation of the present utility model is difficult for producing the radiation consume under the non-resonance frequency that sets, the radiation efficiency height only need use the current strength of lower-wattage can reach the desired effect of antenna originally again.

On the other hand, when the utility model makes signal feed side 34 and earth terminal 36 more make signal by circuit board feed-in chip aerial 30 for the design of arc lamellar body, the disappearance of also unlikely generation radiant energy loss, and when making the utility model be applied to dual-band mobile phone, have more the advantage of the good and low power consumption of communication quality.

Claims

1. A chip antenna, characterized in that: comprising:

An antenna body, one edge of which is provided with a signal feed-in terminal and a ground terminal; and

A groove, formed on the body, is used to divide the antenna body into at least two operation paths, and at least one resonant end is formed on each operation path, and its edge is a pointed structure, wherein, in the antenna The turning point of the body edge and not the resonant end is formed into an arc-shaped structure.

2. The chip antenna according to claim 1, wherein the signal feed-in terminal and the ground terminal are arc-shaped plates.

3. The chip antenna according to claim 1, wherein the two operating paths have different current path lengths to have different resonant frequencies, so that the chip antenna transmits and receives radio signals of two frequencies.

4. The patch antenna according to claim 3, wherein the resonant frequencies are 1800 MHz and 900 MHz respectively.