CN200944430Y

CN200944430Y - Handset built-in antenna

Info

Publication number: CN200944430Y
Application number: CN 200620017999
Authority: CN
Inventors: 张欣; 王健
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2007-09-05
Anticipated expiration: 2016-08-29

Abstract

The utility model discloses a mobile phone built-in aerial, wherein, the height of an aerial radiator from a printed circuit board is adjustable; within the mobile phone aerial area is provided an inner and an outer casings; the aerial radiator and a prove are fixed on the outer casing; the part of the upper surface of the inner casing where the probe contact passes is hollowed out into a through hole for the probe to contact the mainboard, while the sidewall of the inner casing is arranged with a slide rail or a chute for the aerial to slide up and down; the sidewall of the outer casing is fixed with an elastic sheet capable of sliding along the slide rail or the chute of the inner casing. Adopting the utility model and when the intensity of signal received by mobile phone is weak, the aerial outer casing can be opened along the direction perpendicular to mobile phone back casing surface and the height of the aerial from the mainboard changes along with the up-and-down slide of the casing, thereby reaching the goal of increasing aerial radiation efficiency.

Description

A kind of built-in antenna of mobile phone

Technical field

The utility model relates to built-in antenna of mobile phone.

Background technology

Traditional antenna for mobile phone is divided into built-in and external two big classes.External antenna has bandwidth, received signal is more stable, expense is low advantage, but be exposed to the mobile phone body outer, fragile, also be difficult for coating reflector and protective layer and reduce the injury of mobile phone radiation human body.Along with the shortcoming that the improvement and the external antenna of manufacturing process can't overcome, built-in aerial is applied on the mobile phone more and more, and it can be installed in the mobile phone internal body, Figure 1 shows that a use built-in aerial mobile phone side view.Common built-in aerial form has PIFA antenna (planar inverted-F antenna), built-in monopole antenna, PCB antenna, ceramic medium antenna etc.The PIFA antenna is to make into L shapedly with being installed in quarter-wave aerial on the ground level of circuit of cell phone mainboard, and a bit carries out feed what depart from mounting points, is the most normal adopted a kind of form in the built-in antenna of mobile phone.The key technical indexes of antenna has gain, efficient, directivity, return loss etc.Need take all factors into consideration the factor of various aspects such as antenna electrical performance index, technology, outward appearance, operability, cost during a built-in aerial in design, and one of them key point to be exactly how many spaces can utilize, thereby satisfy the requirement of electric property.For GSM 900MHz mobile phone, the size of PIFA antenna requires the 30mm*20mm*7mm in particular cases can 30mm*15mm*6mm usually.Highly be an important parameter that influences radiation efficiency, antenna height is low more, and the aerial radiation face is just near more from ground plane, and the radiation efficiency of antenna also can be low more.In general, the requirement for height of built-in aerial radiant body distance P CB is more than or equal to 6mm.But at present, ultra thin handset is a kind of fashion trend, and the thickness of whole mobile phone is more and more littler, thereby the height space of leaving antenna for is also more and more littler.Usually, pursue the radiation efficiency that probably will sacrifice antenna attractive in appearance of moulding because of highly not reaching requirement.Some mobile phone is that the space of having sacrificed printed circuit board (PCB) increases antenna height, but increasable amplitude is also very limited.Adopt other form, as PCB antenna, ceramic medium antenna often bandwidth can not meet the demands.

The utility model content

The technical problems to be solved in the utility model is, at the problem that prior art exists, design and a kind ofly can regulate built-in aerial highly, and the electric property of antenna is not sacrificed in the requirement that can satisfy the ultra thin handset appearance design again.

The technical solution of the utility model is: the antenna radiator of mobile phone can be regulated apart from the height of printed circuit board (PCB), antenna area at mobile phone is provided with inside and outside two-layer housing, antenna radiator and probe stationary are on described shell body, the upper surface antenna probe contact of described inner housing hollows out into through hole for probe contact mainboard through the place, the slide rail or the chute that can supply antenna to slide up and down be arranged on the sidewall of described inner housing, and fixing at the sidewall of described shell can be along the shell fragment of slide rail on the described inner casing or chute slip.

Slide rail in the technique scheme or chute can be sawtooth patterns.

In technique scheme, can also be provided with location, front and back buckle, locating groove before and after correspondingly described shell body is provided with by described inner housing.

In technique scheme, can also described inner housing be provided with and locate buckle up and down, correspondingly described shell body is provided with locating groove up and down.

In technique scheme, described probe can be telescopic pipe box structure.

Use the utility model, when a little less than the mobile phone receiving signal intensity time, can draw back the shell of antenna along the direction of vertical mobile phone back cover face,, thereby reach the purpose that increases antenna radiation efficiency along with the sliding up and down day height of line-spacing mainboard and will change of shell thereupon.Thickness when the utility model not only can be avoided mobile phones design is limit, and can promote the electric property of antenna again.

Description of drawings

Fig. 1 is the side view of existing bar phone;

Fig. 2 is the side view of an embodiment of the utility model when shell draws back;

Fig. 3 is the shell body inner structure figure of an embodiment of the utility model;

Fig. 4 is an embodiment inner housing front elevation of the present utility model;

Fig. 5 is an embodiment inner housing side view of the present utility model.

Embodiment

Below in conjunction with accompanying drawing enforcement of the present utility model is described in detail.

Fig. 1 is a kind of of existing bar phone, and 11 is the antenna area housing among the figure, and 12 is the cell area housing, and 13 is fore shell.The utility model is seen with common bar phone of the prior art as broad as long when antenna is closed from the outside.

Fig. 2 is the situation of the utility model after shell body draws back.21 is the battery case body among the figure, and 22 is the cell area housing, and 23 is handset front case, and 24 is inner housing.

Fig. 3 is the shell body inner structure figure of an embodiment of the utility model.The probe 312 of antenna radiator 311, antenna ground point and feedback point is fixed on the shell body, and fixing mode can be blanching etc.Probe is telescopic pipe box structure, when antenna height changes, the elasticity of probe guarantee all the time with printed circuit board on ground pad and feedback point contact well, can not be offset.Also be fixed with slide 313 on the antenna casing body sidewall, and can drive chute or slide rail 442 slips of shell body along inner housing, the outward flange shape of slide plate and chute or slide rail should coincide.

Come off when preventing that antenna casing from outwards pulling out, increased and located buckle 314 up and down, when antenna slides into highest point, this buckle can be embedded in the draw-in groove 445 among Fig. 4 just, and this buckle has a fixed inclination, make to block to be not easy to continue afterwards to draw, go back but can oppositely slide toward identical direction.In order to prevent that antenna from moving forward and backward in sliding process, having increased the outstanding positioner 315,315 of T type can motion in the draw-in groove 445 of antenna inner casing all the time, when so just having avoided shell to slide outer before and after with about skew.

Fig. 4 and Fig. 5 show the structure of antenna inner housing.Chute or slide rail 442 are arranged on inner housing, before and after locator card catching groove 445 and locate the draw-in groove 444 of buckle up and down, the 443rd, the probe 312 of antenna ground point and feedback point is through the through hole that hollows out in zone, concrete size can be adjusted, the antenna inner casing back side can increase casing rigidity, prevent the distortion of slide rail, being unlikely to again to see when antenna casing skids off simultaneously influences by the mainboard device attractive in appearance.

Fig. 5 is the inner casing lateral plan.Among the figure, 54 represent inner housing.The 542nd, a kind of zigzag execution mode of chute among Fig. 4 or slide rail.

By slip antenna casing body, the aerial radiation face can get a promotion from the distance of printed circuit board (PCB), and the height of antenna can be increased, and after the antenna elevated height, the radiation efficiency of antenna can be significantly improved.

Claims

1, a kind of built-in antenna of mobile phone, it is characterized in that, its antenna radiator can be regulated apart from the height of printed circuit board (PCB), antenna area at mobile phone is provided with inside and outside two-layer housing, antenna radiator and probe stationary are on described shell body, the upper surface antenna probe contact of described inner housing hollows out into through hole for probe contact mainboard through the place, the slide rail or the chute that can supply antenna to slide up and down be arranged on the sidewall of described inner housing, and fixing at the sidewall of described shell can be along the shell fragment of slide rail on the described inner casing or chute slip.

2, the described built-in antenna of mobile phone of claim 1 is characterized in that, described slide rail or chute are sawtooth patterns.

3, the described built-in antenna of mobile phone of claim 1 is characterized in that, location buckle before and after described inner housing is provided with, locating groove before and after correspondingly described shell body is provided with.

4, the described built-in antenna of mobile phone of claim 1 is characterized in that, described inner housing is provided with locatees buckle up and down, and correspondingly described shell body is provided with locating groove up and down.

5, the described built-in antenna of mobile phone of claim 1 is characterized in that, described probe is telescopic pipe box structure.