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Spurious suppression device and method

A stray suppression device and stray technology, applied in the field of communication, can solve the problems of large stray interference, large influence of receiving sensitivity, stray and other problems, and achieve the effect of reducing stray interference and improving receiving sensitivity

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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the current high requirements for the miniaturization, thickness and cost of mobile phones, the difficulty of layout and wiring is increasing, resulting in serious spurious problems
[0004] To sum up, the stray interference of communication equipment supporting multiple frequency bands in the prior art is relatively large, resulting in a large impact on receiving sensitivity

Method used

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  • Spurious suppression device and method
  • Spurious suppression device and method

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] figure 1 A structural block diagram of the spurious suppression device provided by the embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown. Such as figure 1 As shown, the device includes:

[0023] The power amplifier 11 , the duplexer 12 and the harmonic suppression circuit 13 , the output end of the power amplifier 11 is connected to the transmitting end of the duplexer 12 , and the common end of the duplexer 12 is connected to the input end of the harmonic suppression circuit 13 .

[00...

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Abstract

The invention is suitable for the technical field of communications, and particularly relates to a spurious suppression device and method. The device comprises a power amplifier, a duplexer and a harmonic suppression circuit, wherein an output end of the power amplifier is connected with a transmitting end of the duplexer; a common port of the duplexer is connected with an input end of the harmonic suppression circuit; and the harmonic suppression circuit is used for controlling input impedance of the harmonic suppression circuit to be matched with output impedance of the harmonic suppression circuit, and controlling resonant frequency of the harmonic suppression circuit to be the same as transmitting frequency of a signal to be transmitted. Through arrangement of the harmonic suppression circuit which is connected with the common port of the duplexer, the input impedance of the harmonic suppression circuit is controlled to be matched with the output impedance, and the resonant frequency of the harmonic suppression circuit is controlled to be the same as the transmitting frequency of the signal to be transmitted, so that the influence of the harmonic suppression circuit on the transmitting frequency of the signal to be transmitted is relatively small; harmonic signals are attenuated greatly; spurious interference can be reduced; and the receiving sensitivity is increased.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a device and method for suppressing strays. Background technique [0002] A multi-mode and multi-frequency mobile phone refers to a mobile phone that can be used between networks of different technical standards, that is, a mobile phone can support multiple network standards and multiple network frequency bands at the same time. Before the emergence of multi-mode and multi-frequency mobile phones, ordinary handheld devices usually only support dual-mode, that is, support GSM (Global System for Mobile communication, Global System for Mobile Communications) and TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time division synchronization Code Division Multiple Access), or support GSM and WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access). And with 4G (the 4 th Generation mobile communication technology, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04H04B1/10
CPCH04B1/0475H04B1/1036H04B2001/1072H04W88/06
Inventor 杨加峰
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