CN205846213U - Embedded antenna for mobile terminal and mobile terminal - Google Patents

Abstract

This utility model provides a kind of embedded antenna for mobile terminal and mobile terminal.This embedded antenna for mobile terminal includes wireloop antenna, described wireloop antenna has feed point, described feed point is used for connecting mobile terminal back cover, described wireloop antenna also has the first earth point and the second earth point being respectively arranged at described feed point both sides, and described first earth point and the second earth point are used for making described embedded antenna for mobile terminal receive different frequency range.This utility model have employed the embedded antenna for mobile terminal that can be used in metal back cover based on couple feed principle, by switching the earth point of metal back cover, not additional internal cabling, the most effectively expand the bandwidth of this embedded antenna for mobile terminal, and strengthen the structural strength of complete machine to a certain extent, also reduce production cost.

Description

Embedded antenna for mobile terminal and mobile terminal

[technical field]

This utility model relates to a kind of embedded antenna for mobile terminal and mobile terminal, belongs to electronic equipment accessory technology neck Territory.

[background technology]

Based on user's texture demand for experience to whole metal case mobile phone in the present age, when the metallization of intelligent machine has become as one Still trend.Simultaneously along with the development trend such as ultrathin of mobile phone, part mobile phone products can be with metal shell coating circuit on the market Plate and antenna structure, this metal shell has intensity height, is hardly damaged and has metal-like.

But, large-area metalwork is notable on antenna performance impact, especially using becket as antenna for mobile phone time, by It is extremely limited in the interior of mobile phone space with metal back cover or metal edge frame, between wireloop antenna and adjacent metal back cover Clearly, the energy that wireloop antenna gives off can be in bond due to near-field coupling, causes antenna radiation performance significantly in coupling Reduce；The frequency range of part Carrier Requirements is relatively big with the frequency interval of other frequency ranges simultaneously, and ordinary antennas bandwidth is difficult to meet it Required frequency range.

[utility model content]

In view of this, this utility model provides a kind of embedded antenna for mobile terminal and mobile terminal, and not affecting, it is linear Can be used in the mobile terminal with metal back cover in the case of energy, and this embedded antenna for mobile terminal can be applicable to multifrequency Section.

For achieving the above object, this utility model provides a kind of embedded antenna for mobile terminal, including wireloop antenna, described Wireloop antenna has feed point, and described feed point is used for connecting mobile terminal back cover, and described wireloop antenna also has and is respectively provided with In the first earth point and second earth point of described feed point both sides, described first earth point and the second earth point are used for making described shifting Dynamic terminal built-in antenna receives different frequency range.

Further, described first earth point is used for making described embedded antenna for mobile terminal receive low frequency or high frequency, described Second earth point is used for making described embedded antenna for mobile terminal receive intermediate frequency.

Further, described wireloop antenna is planar inverted F-antenna.

Further, described wireloop antenna and described mobile terminal back cover interval are arranged, and spacing is 1-2mm.

On the other hand, this utility model also provides for a kind of mobile terminal, and it is internally provided with described movement as above Terminal built-in antenna.

Further, described mobile terminal is mobile phone.

Further, a width of 71-75mm of back cover of described mobile phone, a length of 130-135mm, described wireloop antenna a width of 6.5mm。

It is built-in that this utility model have employed the mobile terminal that can be used in having metal back cover based on couple feed principle Antenna, by switching the earth point of metal back cover, not additional internal cabling, has the most effectively expanded the built-in sky of this mobile terminal The bandwidth of line, and strengthen the structural strength of complete machine to a certain extent, also reduce production cost.

[accompanying drawing explanation]

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, will use required in embodiment below Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only embodiments more of the present utility model, right From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings Other accompanying drawing.

The relative position view of the embedded antenna for mobile terminal that Fig. 1 provides for this utility model and metal back cover.

Fig. 2 is that the embedded antenna for mobile terminal that this utility model provides receives frequency by under the state of the first earth point ground connection Section schematic diagram.

Fig. 3 is the return loss plot that will produce under the state of the first earth point ground connection.

Fig. 4 is that the embedded antenna for mobile terminal that this utility model provides receives frequency by under the state of the second earth point ground connection Section schematic diagram.

Fig. 5 is the return loss plot that will produce under the state of the second earth point ground connection.

Description of reference numerals

10-metal back cover

20-wireloop antenna

21-the first earth point

22-the second earth point

23-feed point

A-low-frequency range

B-high band

C-Mid Frequency

[detailed description of the invention]

In order to be better understood from the technical solution of the utility model, below in conjunction with the accompanying drawings this utility model embodiment is carried out Describe in detail.

It will be appreciated that be only this utility model a part of embodiment rather than the whole enforcement of described embodiment Example.Based on the embodiment in this utility model, those of ordinary skill in the art are obtained under not making creative work premise The all other embodiments obtained, broadly fall into the scope of this utility model protection.

The term used in this utility model embodiment is only merely for describing the purpose of specific embodiment, and is not intended to Limit this utility model." a kind of " of singulative used in this utility model embodiment and appended claims, " described " and " being somebody's turn to do " is also intended to include most form, unless context clearly shows that other implications.

The relative position view of the embedded antenna for mobile terminal that Fig. 1 provides for this utility model and metal back cover.Fig. 2 is By under the state of the first earth point ground connection, the embedded antenna for mobile terminal that this utility model provides receives frequency range schematic diagram.Fig. 3 is The return loss plot that will produce under the state of the first earth point ground connection.Fig. 4 is by under the state of the second earth point ground connection, this reality Frequency range schematic diagram is received with the embedded antenna for mobile terminal of novel offer.Fig. 5 is will to produce under the state of the second earth point ground connection Return loss plot.The embedded antenna for mobile terminal that this utility model provides is applicable to polytype mobile terminal.

As Figure 1-3, the embedded antenna for mobile terminal that this utility model provides generally includes wireloop antenna 20, described Wireloop antenna 20 has feed point 23, and described feed point 23 is used for connecting mobile terminal back cover 10, and described wireloop antenna 20 also has There are the first earth point 21 and the second earth point 22 being respectively arranged at described feed point 23 both sides, described first earth point 21 and second Earth point 22 is used for making described embedded antenna for mobile terminal receive different frequency range.

Generally, metal edge frame or metal back cover belong to the intrinsic metalwork of mobile terminal, the regularity of distribution, regular shape, its Distributed coupling energy can be produced under built-in aerial excites.This utility model uses traditional planar inverted F-antenna (Planar Inverted F-shaped Antenna, PIFA) structure, using metal back cover 10 as the built-in sky of this mobile terminal Unique radiant body of line.According to Cavity theory, feed point 23 is fed directly into metal back cover 10 not only by this embedded antenna for mobile terminal So that maximum current is in metal back cover 10 body, Energy Efficient is radiate, and the structure of beneficially complete machine sets Meter.

Such as, first of all for meeting low frequency 824MHz-960MHz and high frequency 1710MHz-2170MHz frequency range, by figure Show that in 2, feed point 23 position is fed directly into, and the short dot position of this embedded antenna for mobile terminal is the first earth point 21, and pass through Suitable Matching and modification makes it meet high-frequency resonant.

Fig. 3 is the return loss plot that will produce under the state of the first earth point ground connection.Low-frequency resonant as seen from Figure 3 (830MHz-960MHz) S11 with high-frequency resonant (1710MHz-2170MHz) is respectively positioned on below-5db, and this mobile terminal is described The better performances of built-in aerial.

Owing to band segment is the biggest, as being positioned at 1440MHz-1510MHz with the frequency interval of above-mentioned high and low frequency Frequency range (Band 11), belongs to intermediate bands, and ordinary antennas is difficult to meet this three frequency ranges simultaneously.

In general, according to the wavelength of the resonant frequency point of PIFA antenna it is:

$\mathrm{\λ}/4=\frac{c}{\sqrt{\mathrm{\μ}\mathrm{\ϵ}}f},$

In above formula, c is the light velocity, and u is dielectric permeability, and ε is dielectric constant, and f is resonant frequency.

Understood antenna resonant frequency by above formula to be inversely proportional to its wavelength, therefore to obtain higher antenna resonant frequency, only need Antenna wavelength is shortened, i.e. reduces antenna cabling.

This utility model uses the position of switching earth point i.e. to increase the spacing of feed point 23 and short dot, thus reduces antenna Cabling, it is achieved the switching between different frequency range, the most effectively.Short dot position is accessed at the second earth point 22, such as Fig. 4 institute Showing so that the medium and low frequency branch of wireloop antenna 20 shortens, resonant frequency point is just kissed with the frequency range of 1440MHz-1510MHz Close so that the beamwidth of antenna is widened, thus solves band segment and other frequency ranges owing to differing greatly and nothing between Frequency point The problem that method is compatible.Fig. 5 is the return loss plot that will produce under the state of the second earth point ground connection.As seen from Figure 5, should Embedded antenna for mobile terminal resonance can meet 1440MHz-1510MHz frequency range in preferable state.

It is built-in that this utility model have employed the mobile terminal that can be used in having metal back cover based on couple feed principle Antenna, by switching the earth point of metal back cover 10, not additional internal cabling, has the most effectively expanded this mobile terminal built-in The bandwidth of antenna, and strengthen the structural strength of complete machine to a certain extent, also reduce production cost.

Wherein, described wireloop antenna 20 and described mobile terminal back cover 10 interval are arranged, and are generally positioned at metal back cover The lower section of 20, spacing can be 1-2mm.In one embodiment, it is preferred that spacing be 1.2mm.

This utility model also provides for a kind of mobile terminal, and it is internally provided with the built-in sky of described mobile terminal as above Line.

Further, described mobile terminal can be various electronic, such as, can be mobile phone, panel computer etc..

In one embodiment, back cover 10 width of described mobile phone can be 71-75mm, and length can be 130-135mm, described The width of wireloop antenna 20 can be 6.5mm.

This utility model have employed based on couple feed principle can be used in be had in the mobile terminal of metal back cover 10 Put antenna, by switching the earth point of metal back cover 10, it is achieved the switching between different frequency range, the most effectively, and from necessarily Strengthen the structural strength of complete machine in degree, also reduce production cost.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. done, should be included in this utility model Within the scope of protection.

Claims (7)

1. an embedded antenna for mobile terminal, it is characterised in that include that wireloop antenna, described wireloop antenna have feed point, Described feed point is used for connecting mobile terminal back cover, and described wireloop antenna also has and is respectively arranged at the first of described feed point both sides Earth point and the second earth point, described first earth point and the second earth point are used for making described embedded antenna for mobile terminal receive not Same frequency range.

Embedded antenna for mobile terminal the most according to claim 1, it is characterised in that described first earth point is used for making described Embedded antenna for mobile terminal receives low frequency or high frequency, during described second earth point is used for making described embedded antenna for mobile terminal receive Frequently.

Embedded antenna for mobile terminal the most according to claim 1, it is characterised in that described wireloop antenna is plane inverse-F Shape antenna.

Embedded antenna for mobile terminal the most according to claim 1, it is characterised in that described wireloop antenna and described movement Terminal back cover interval is arranged, and spacing is 1-2mm.

5. a mobile terminal, it is characterised in that its be internally provided with as described in any one of claim 1-4 as described in mobile eventually End built-in aerial.

Mobile terminal the most according to claim 5, it is characterised in that described mobile terminal is mobile phone.

Mobile terminal the most according to claim 6, it is characterised in that a width of 71-75mm of back cover of described mobile phone, a length of 130-135mm, a width of 6.5mm of described wireloop antenna.