CN2750497Y

CN2750497Y - Mobile telephone set having antenna frequency deviation compensation function

Info

Publication number: CN2750497Y
Application number: CN 200420074101
Authority: CN
Inventors: 蔡调兴; 邱建评; 郭肇强
Original assignee: Quanta Computer Inc
Current assignee: Quanta Computer Inc
Priority date: 2004-09-06
Filing date: 2004-09-06
Publication date: 2006-01-04
Anticipated expiration: 2014-09-06

Abstract

The utility model relates to a mobile telephone with an antenna frequency deviation compensation function, which comprises a circuit base board, an antenna used for the induction of a first frequency range and a parasitic resonance element, wherein one end of the parasitic element is electrically connected with the circuit base board and resonated on the first frequency range of the antenna to properly counteract the phenomenon of the frequency deviation of the metallic surface of the mobile phone so as to increase the strength of the sending and the receiving of signals to reach the efficiency of the improvement of the quality of signal receiving.

Description

Mobile phone with antenna frequency deviation compensate function

Technical field

The utility model relates to a kind of mobile phone, and particularly a kind of mobile phone with antenna frequency deviation compensate function is to reach the effect of improving frequency shift (FS) and mobile phone transmitting-receiving.

Background technology

Owing to use the wireless communication technology of electromagnetic wave transmission signal, have in the use need not connect cable and can reach the effect of linking up with far end device, and have the advantage of being convenient to move, make and utilize the mobile phone of wireless communication technology universal day by day.The communication network that today, most of mobile phone used is nothing more than pan-European communication network (Groupe Special Mobil, hereinafter to be referred as GSM) or digital communication system (Digital Communication System, hereinafter to be referred as DCS), wherein, the working band of GSM is that 800～960MHz and DCS frequency band are 1710～1880MHz.Therefore, the function that present mobile phone is provided mostly is at least double frequency, refers to be suitable for GSM and DCS.

Yet the middle solid line of the voltage standing wave ratio (VSWR) of the cooperation Fig. 1 operating frequency of DFS double frequency shift mobile phone as can be known is GSM (900MHz) and DCS (1800MHz).Yet, when mobile phone is flat on (as the dotted portion among Fig. 1) on the metal surface, for example chase, desk or the like, can cause the resonance point skew of antenna, especially the situation of the frequency shift (FS) of the frequency band of GSM (referring to 900MHz) is serious, if the antenna of mobile phone contacts with the metal surface, then frequency shift (FS) phenomenon is more apparent serious.When frequency shift (FS) took place, the transmitting-receiving effect of mobile phone meeting variation caused communication quality to descend.

Summary of the invention

Therefore, the purpose of this utility model is promptly providing a kind of mobile phone with antenna frequency deviation compensate function, to reach effective reduction frequency shift (FS) and the effect of improving mobile phone transmitting-receiving quality.

The utlity model has the mobile phone of antenna frequency deviation compensate function, is to comprise a circuit substrate, an antenna and a parasitic resonance element; Wherein, this antenna is as ground plane and in order to respond to one first frequency band with this circuit substrate; And an end of this parasitic resonance element is to connect this circuit substrate and resonate in first frequency band of this antenna.Wherein, described first frequency band can be 900MHz.

Effect of the present utility model can provide the mobile phone with antenna frequency deviation compensate function, is used as the resonance point of GSM frequency band to utilize a parasitic resonance element that connects circuit substrate, and then reduces frequency shift (FS) and improve mobile phone transmitting-receiving quality.

Description of drawings

Fig. 1 is a kind of voltage standing wave ratio figure of known mobile phone, and dotted line represents to be seated in the known mobile phone on the iron plate, and solid line represents to show the known mobile phone that is seated in iron plate;

Fig. 2 is the schematic diagram of a preferred embodiment that the utlity model has the mobile phone of antenna frequency deviation compensate function;

Fig. 3 is the cross-sectional schematic of the embodiment of Fig. 2;

Fig. 4 is that the present embodiment mobile phone is seated in the voltage standing wave ratio figure on the iron plate, and dotted line is represented known mobile phone, and solid line is represented the mobile phone of present embodiment;

Fig. 5 is that the present embodiment mobile phone is seated in upward transmitting power figure of iron plate, and rectangle is represented known mobile phone, and rhombus is represented the mobile phone of present embodiment;

Fig. 6 is that the present embodiment mobile phone is not seated in the voltage standing wave ratio figure on the iron plate, and dotted line is represented known mobile phone, and solid line is represented the mobile phone of present embodiment;

Fig. 7 is the schematic diagram of another embodiment of the present utility model, and the parasitic resonance element of this embodiment is arranged at battery cover; And

Fig. 8 is the cross-sectional schematic of the embodiment of Fig. 7.

The reference numeral explanation

1 mobile phone, 13 antennas

11 housings 14,14 ' parasitic resonance element

111 battery covers 141,141 ' lead piece

12,12 ' circuit substrate

Embodiment

About aforementioned and other technology contents, characteristics and effect of the present utility model, in the detailed description of two preferred embodiments of following conjunction with figs., can clearly understand.

Cooperate Fig. 2, the utlity model has the antenna frequency deviation compensate function mobile phone 1 one roughly have circuit substrate 12, an antenna 13 and the parasitic resonance element 14 that a housing 11, is positioned at housing 11 than embodiment.This routine antenna 13 is for to be arranged at the expose antenna of circuit substrate 12 as ground plane.This antenna 13 has GSM frequency band (referring to first frequency band) and DCS frequency band.

Parasitic resonance element 14 is arranged on the idle space of housing 11 inside and connects to circuit substrate 12 and resonate in the GSM of antenna 13 frequency band.In the present embodiment, parasitic resonance element 14 is arranged on inside, housing 11 top, and as Fig. 3, parasitic resonance element 14 is to connect to circuit substrate 12 with circuit substrate 12 maintenance one spacings and by a lead piece 141.This routine parasitic resonance element 14 is metal materials and is the L font.In addition, lead piece 141 can be shell fragment, thimble, scolding tin, screw lock or the like, and this routine parasitic resonance element 14 is directly to be fixed on the circuit substrate 12 from the lead piece 141 such as scolding tin.

So, when present embodiment is flat on the metal surface, because parasitic resonance element 14 can provide the resonance point in the GSM frequency band; Therefore, as Fig. 4, can eliminate most of frequency shift (FS) (dotted line is known mobile phone, and solid line is the mobile phone in the present embodiment) when the GSM frequency band, to solve known mobile phone because of problem that frequency shift (FS) is caused.Simultaneously, as Fig. 5, the transmitting power of present embodiment mobile phone 1 can promote 6～8dB compared to the transmitting power of known mobile phone, antenna gain when parasitic resonance element 14 can effectively increase mobile phone 1 really and is placed in the metal surface as can be known, and then reach effective effect of improving mobile phone 1 transmitting-receiving usefulness.

In addition, as shown in Figure 6, when the mobile phone 1 of present embodiment is not that for example the user hands, is placed in plastic tabletop or the like when being placed on the nonmetallic surface, present embodiment mobile phone 1 can't be because of additional its task performance that influence of parasitic resonance element 14.

Moreover, as have the knack of known to this skill person, the putting position of parasitic resonance element 14 can change according to mobile phone 1 inner space, as Fig. 7 and Fig. 8, parasitic resonance element 14 ' can be arranged on battery cover 111 inner surfaces of housing 1, and circuit substrate 12 ' on corresponding parasitic resonance element 14 ' the position install a lead piece 141 such as shell fragment ', so, when battery cover 111 is assembled on the housing 11, parasitic resonance element 14 ' can by lead piece 141 ' connect circuit substrate 12 ', so that the resonance point in the GSM frequency band to be provided.

According to preceding described, utilize parasitic resonance element 14,14 ' increase also to be subjected to the resonance point of the frequency band that the metal surface disturbs in the mobile phone 1 in the utility model, with the situation of improving the frequency shift (FS) of mobile phone 1 on the metal surface and the intensity that improves signal transmitting and receiving, and then the signal transmitting and receiving quality of raising mobile phone 1.

The above person of thought, it only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, promptly the simple equivalent of being done according to the utility model claim and description of the invention content generally changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. the mobile phone with antenna frequency deviation compensate function is characterized in that, this mobile phone comprises: a circuit substrate; One antenna is as ground plane and in order to respond to one first frequency band with described circuit substrate; And a parasitic resonance element, the one end is to connect described circuit substrate and resonate in first frequency band of described antenna.

2. according to the described mobile phone of claim 1, wherein, described parasitic resonance element is to be the L font.

3. according to the described mobile phone of claim 1, wherein, described parasitic resonance element is to connect to described circuit substrate by a lead piece.

4. according to the described mobile phone of claim 1, wherein, the material of described parasitic resonance element is a metal.

5. according to the described mobile phone of claim 1, wherein, described first frequency band is 900MHz.