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Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method

A technology of TD-SCDMA and mobile terminals, which is applied in the field of dual-mode and dual-standby mobile terminals. It can solve problems such as poor effect, affecting the appearance size of mobile phones and antenna performance, and achieve the effect of reducing radio frequency interference.

Inactive Publication Date: 2009-06-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the method for reducing the mutual radio frequency interference between the two modes in the dual-mode and dual-standby mobile terminal is not effective, and affects the appearance size and antenna performance of the mobile phone at the same time, and provides a method for reducing The dual-mode dual-standby mobile terminal for GSM interference to TD-SCDMA and its implementation method effectively reduces the mutual radio frequency interference when the two modes work at the same time, and does not affect the appearance size and antenna performance of the mobile phone at the same time

Method used

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  • Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method
  • Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method
  • Double mode double standby mobile terminal for reducing GSM interference to TD-SCDMA and its realizing method

Examples

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Embodiment Construction

[0027] figure 1 Shown is a circuit block diagram of the dual-mode dual-standby mobile terminal of the present invention, including a GSM module 100 and a TD-SCDMA module 150 . The GSM module 100 includes a GSM transceiver chip 110 , a power amplifier (PA) 120 , a dielectric filter 130 , and a GSM antenna and its switch 140 . The TD-SCDMA module 150 includes a TD-SCDMA receiving chip 160 , a first SAW filter ( SAW1 ) 170 , a second SAW filter ( SAW2 ) 180 , and a TD-SCDMA antenna and its switch 190 . Wherein, the withstand power of the dielectric filter 130, that is, the maximum power it can withstand is greater than or equal to 30 dBm, and the insertion loss is less than or equal to 2 dB. The first SAW filter 170 is a single-ended to differential receiving SAW filter, and the second SAW filter 180 is a single-ended to single-ended receiving SAW filter. The total insertion loss after the two filters are connected in series will be less than or Equal to 3dB. The GSM antenna a...

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Abstract

The invention comprises: a GSM transceiver chip, power a power amplifier, a GSM antenna and its switch, a TD-SCDMA reception chip, a first surface acoustic wave filter and a TD-SCDMA antenna and its switch. The invention also comprises a media filter sitting between the amplifier and the GSM antenna and used for reducing the leakage of side band noise; a second filter sitting between the first sound acoustic wave filter and the TD-SCDMA antenna and used for reducing the received GSM interference signal power. The invention uses a newly-added media filter to reduce the side band noise leakage of the GSM signals sent from GSM transceiver chip, and to reduce the GSM signal power received by TD-SCDMA receiving chip.

Description

technical field [0001] The invention belongs to the field of mobile communication terminals, and in particular relates to a dual-mode, dual-standby mobile terminal for reducing GSM interference to TD-SCDMA and a realization method thereof. Background technique [0002] China's self-developed 3G standard - TD-SCDMA will start trial operation in the near future, but it will have to face the problem of insufficient network coverage in the early stage of construction. If this practical problem cannot be solved, it will greatly affect TD-SCDMA Web user development. The best solution to this problem is to supplement the TD-SCDMA network with the help of other networks. In the environment where TD-SCDMA network exists, users can use the superior performance of 3G network, and in the absence of TD-SCDMA network, users can also use services of other networks to ensure normal communication of users. The already mature GSM network can just meet the above conditions. If TD-SCDMA / GSM d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/32H04B1/10H04W88/06
CPCY02B60/50
Inventor 赵真理周勇
Owner ZTE CORP