CN201032717Y

CN201032717Y - Dual-mode dual-standby mobile phone with dual-embedded antenna

Info

Publication number: CN201032717Y
Application number: CNU2006200850882U
Authority: CN
Inventors: 吴永刚; 李德华
Original assignee: Hisense Group Co Ltd; Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Group Co Ltd; Hisense Mobile Communications Technology Co Ltd
Priority date: 2006-05-31
Filing date: 2006-05-31
Publication date: 2008-03-05
Anticipated expiration: 2016-05-31

Abstract

The utility model relates to a dual mode multipoint cell phone, which comprises a first antenna unit and a second antenna unit. The two antennas adopt different communication modes, the two antennas are the CDMA antenna and the GSM antenna, and the two antennas both adopt the cell phone PIFA antenna which is the built-in plane reversion F type antenna. The arrangement of the cell phone main board is that a CDMA radio frequency and a baseband are arranged on one side of the cell phone main board, a GSM radio frequency and a baseband are arranged on the other side of the cell phone main board, and the placements are staggered up and down; the CDMA antenna is arranged on the top of the cell phone main board, and the GSM antenna is arranged on the bottom of the cell phone main board. The signal isolation between the two built-in antennas is strengthened, the auto-interference of the utility model is reduced, and the utility model has a good dual mode communication quality.

Description

The dual-mode and dual-idle mobile phone that has two built-in aerials

Technical field

The utility model belongs to the mobile communication terminal technical field, more particularly, relates to the dual-mode and dual-idle mobile phone that adopts two slave antennas.

Background technology

As everyone knows, electronic communication equipment all will be followed reliability and Electro Magnetic Compatibility (hereinafter to be referred as EMC) designing requirement, and many countries have all formulated serial testing standard and standard with organizing for this reason.Nowadays as the mobile phone of popular consumer electronics, volume is more and more littler, function is more and more, also will satisfy omnidirectional's total radiant power/omnidirectional's total sensitivity (TRP/TIS), Electro Magnetic Compatibility (hereinafter to be referred as EMC), specific absorption ratio test requests such as (SAR) simultaneously, design difficulty is increasing naturally.Specifically, the size of volume can influence the power gain and the efficient of built-in aerial; Function is more and more, and as TFT color screen, camera, multimedia chip, bluetooth etc., the high-frequency interferencing signal that baseband circuit produces can be received by antenna again, and then influences the sensitivity of mobile phone.

Antenna is the key component of Radio Frequency Subsystem, is divided into external fixing, telescopic antenna and built-in aerial.The common dual-mode handset of using mainly is meant the mobile phone of supporting two kinds of patterns in GSM, CDMA, four kinds of patterns of WCDMA, TD-SCDMA at least at present, but two kinds of communication patterns are not to work simultaneously, belong to the double-mode single-standby hand set.Therefore from saving the angle of cost and spatial volume, the antenna scheme of common dual-mode handset generally all adopts single secondary dual-mode antenna, satisfies the communicating requirement of two kinds of a plurality of frequency ranges of pattern.

The special feature of dual-mode and dual-idle mobile phone is that two kinds of patterns are worked simultaneously, in the mobile phone of double-module double-standby, adopt single slave antenna, shortcoming is that the signal (comprising the base station signal that mobile phone transmits and receives) of two kinds of patterns certainly will produce very strong crosstalking at the antenna place, enter the other side's receiver each other and cause signal jam, having a strong impact on communication quality even cause can't proper communication.

Summary of the invention

The utility model is in order to solve in the dual-mode and dual-idle mobile phone problem of the mutual cross talk effects communication quality of signal between two kinds of communication patterns, a kind of dual-mode and dual-idle mobile phone with two slave antennas has been proposed, adopt the technical scheme of a secondary built-in aerial, a secondary external antenna or two built-in aerials, strengthen the Signal Spacing between the different communication modes, reduced the interference of self.

Comprise first antenna element, second antenna element in the dual-mode and dual-idle mobile phone that the utility model proposes, two slave antennas adopt different communication patterns, and wherein having common antenna at least is built-in antenna of mobile phone.

Two slave antennas are CDMA standard antenna and GSM standard antenna, and preferred scheme is that all to adopt mobile phone PIFA antenna be built-in flat inversed F type antenna to two slave antennas.

CDMA radio frequency and base band are placed on the one side of cell phone mainboard, and GSM radio frequency and base band are placed on the another side of cell phone mainboard, and riding position staggers up and down.

Wherein the CDMA antenna is placed on the top of cell phone mainboard, and the GSM antenna is placed on cell phone mainboard bottom, strengthens the Signal Spacing between the two secondary built-in aerials, reduces self and disturbs.

Bar phone at the two built-in aerials of CDMA/GSM double-module double-standby, improve complete machine EMC, take into account TRP/TIS and SAR test request, so just can be on space layout, strengthen the Signal Spacing between two patterns of CDMA/GSM to greatest extent, reduce the power signal that frequency is close between two slave antennas and crosstalk mutually.

Description of drawings

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 1 is the bar phone pcb board A face schematic layout pattern of the two built-in aerials of double-module double-standby;

Fig. 2 is the bar phone pcb board B face schematic layout pattern of the two built-in aerials of double-module double-standby;

Fig. 3 is the pcb board A panel bitmap of an embodiment of the utility model;

Fig. 4 is the pcb board B panel bitmap of an embodiment of the utility model;

Fig. 5 is the PIFA Principle of Antenna figure of an embodiment of the utility model.

Embodiment

The double-module double-standby bar phone has CDMA and two kinds of communication patterns of GSM, adopts two built-in aerials, and a pair is the CDMA built-in aerial, and another pair is the GSM built-in aerial.As shown in Figure 1 and Figure 2, the space layout of mobile phone is as follows: the A face of mobile phone pcb board, top are LCD modules 300, and the bottom is GSM base band and radio frequency components and parts 102, and receiver 400 is placed on topmost; The B face of mobile phone pcb board is CDMA antenna 201, CDMA radio frequency components and parts 202, CDMA baseband components 203, SIM card or UIM card 500 and GSM antenna 101 from top to bottom successively.That is, the components and parts of CDMA and GSM components and parts are respectively on the two sides of pcb board, and stagger up and down; The modes of emplacement of dual-mode and dual-idle mobile phone electronic component is CDMA antenna 201 and the GSM antenna 101 same one side at pcb board, but is placed in the top of PCB circuit board and bottom respectively.This antenna modes of emplacement just can be on the space layout of electronic component, strengthens the Signal Spacing between the CDMA and two communication patterns of GSM in the dual-mode and dual-idle mobile phone to greatest extent.

As shown in Figure 3, be embodiment pcb board A face layout bitmap in the utility model.The top is a receiver 400, is LCD LCD MODULE 300 below, is GSM base band and radio frequency components and parts 102 below then, and microphone 600 is positioned at the pcb board bottom centre position.In order to realize better EMC index, GSM base band and radio frequency components and parts 102 outer covers one metallic shield ground connection in the dual-mode and dual-idle mobile phone.Like this, the mobile phone key plate can be parallel to the top that the mobile phone pcb board is positioned over this radome.

As shown in Figure 4, be embodiment pcb board B face layout bitmap in the utility model.The top is a CDMA antenna 201, is CDMA radio frequency components and parts 202, CDMA baseband components 203, SIM card/other devices 500 such as UIM card then from top to bottom successively, and the below is a GSM antenna 101.For the EMC Electro Magnetic Compatibility of dual-mode and dual-idle mobile phone considers that CDMA radio frequency 202 and CDMA base band 203 be outer cover one metallic shield ground connection separately.Battery of mobile phone can be parallel to the top that pcb board is placed on CDMA base band radome and sim card/uim card zone.Vibrating motor 700 is placed on the outer left side of CDMA base band radome.If mobile phone has camera, can be placed in CDMA antenna 201 zones.

As shown in Figure 5, be the typical PIFA Principle of Antenna figure that adopts in the mobile phone, PIFA antenna 1 mainly constitutes by plastic stent with attached to the metallic object on the plastic stent.The PIFA antenna requires the PCB of below to be necessary for ground level 2, stretch out two pins from metallic object simultaneously, be respectively Feed pin signal feed pin 1-1 and Short pin grounding leg 1-2, wherein Feed pin 1-1 is connected to the signal feed point on the PCB, and Short pin 1-2 is connected to the ground feedback point of PCB.

In addition, the bulk size of PIFA antenna is very big to the performance impact of antenna, is exactly three parameters specifically: length L, width W and height H, wherein the bandwidth of H and antenna resonant frequency is closely related, W and L decision antenna low-limit frequency.Generally speaking,, require L=35-40mm, W=15-25mm, H=6-8mm in order to carry out Antenna Design.

CDMA and GSM two secondary built-in aerials all adopt the antenna of PIFA flat inversed F type in the mobile phone, use the utility model, guaranteed that antenna performance is not subject to the influence of the number of people, the SAR value is on the low side, also can realize good isolation between two slave antennas on the other hand, reduce interfering with each other of dual-mode handset mode signal, have the excellent communications quality.

Claims

1. the dual-mode and dual-idle mobile phone that has two built-in aerials, it is characterized in that comprising first antenna element, second antenna element, first antenna element is placed on an end of cell phone mainboard, second antenna element is placed on the other end of cell phone mainboard, two slave antennas adopt different communication patterns, and having common antenna at least is built-in antenna of mobile phone.

2. the dual-mode and dual-idle mobile phone that has two built-in aerials according to claim 1 is characterized in that two slave antennas are CDMA standard antenna and GSM standard antenna, all adopts the built-in flat inversed F type of mobile phone PIFA antenna.

3. the dual-mode and dual-idle mobile phone that has two built-in aerials according to claim 1 is characterized in that CDMA radio frequency and base band are placed on the one side of cell phone mainboard, and GSM radio frequency and base band are placed on the another side of cell phone mainboard, and riding position staggers up and down.

4. according to claim 2 or the 3 described dual-mode and dual-idle mobile phones that have two built-in aerials, it is characterized in that the CDMA antenna is placed on the top of cell phone mainboard, the GSM antenna is placed on cell phone mainboard bottom.