Matching circuit, radio frequency front-end power amplification circuit and mobile communication equipment

A power amplification circuit and matching circuit technology, which is applied to high-frequency amplifiers, improved amplifiers to reduce temperature/power supply voltage changes, electrical components, etc., can solve the problem of PA matching circuit harmonic suppression and low-frequency spurious suppression. Meet the technical requirements, difficult to achieve and other problems, to achieve good suppression effect, simple structure, easy to achieve the effect

Active Publication Date: 2021-09-17
LANSUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the harmonic suppression ability and low frequency spurious suppression ability of the existing PA matching circuit are insufficient
The circuit is relatively complex and difficult to realize
Difficulty meeting technical needs

Method used

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  • Matching circuit, radio frequency front-end power amplification circuit and mobile communication equipment
  • Matching circuit, radio frequency front-end power amplification circuit and mobile communication equipment
  • Matching circuit, radio frequency front-end power amplification circuit and mobile communication equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 A schematic diagram of a topology structure of a radio frequency front-end power amplifier circuit in the prior art is shown.

[0026] Such as figure 1 As shown, the existing RF front-end power amplification circuit can include: power amplifier PA and L 01 -L 03 、C 01 -C 04 and L 1 -L 3 composed filter circuit.

[0027] In the prior art, a mobile communication device generally needs to integrate and process various communication signals. For example, mobile communication signals may need to simultaneously process multiple mode signals including at least two of DCS1800 (1.710GHz-1.785GHz) working frequency bands, PSC1900 (1.850GHz-1.910GHz) working frequency bands and GSM (820MHz-920MHz) working frequency bands .

[0028] when figure 1 The circuit shown is when dealing with the power amplifier circuit of DCS1800 (1.710GHz-1.785GHz) and / or PSC1900 (1.850GHz-1.910GHz). DCS1800 and / or PSC1900 can be used as in-band signal. Harmonics of in-band signals a...

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Abstract

The invention relates to a matching circuit, a radio frequency front-end power amplification circuit and a mobile communication device, the matching circuit is used for a radio frequency front-end power amplifier, and the matching circuit comprises: a first impedance matcher, wherein the impedance of the first impedance matcher is a first preset impedance at a first frequency; a first band-pass filter which is bridged between the front end of the first impedance matcher and the ground, wherein the signal of the first frequency passes through the first band-pass filter, and at least one of a signal of a second frequency and a first harmonic signal of the signal of the first frequency is suppressed by the first band-pass filter, and the second frequency is lower than the first frequency; and a first wave trap which is bridged between the rear end of the first impedance matcher and the ground and is used for suppressing a second harmonic signal of the signal of the first frequency.

Description

technical field [0001] The application belongs to the field of mobile communication, and in particular relates to a matching circuit, a radio frequency front-end power amplification circuit and a mobile communication device. Background technique [0002] As an important part of the mobile phone communication system, the RF power amplifier is mainly used to amplify the signal. With the continuous development of mobile phone communication systems, the power requirements for mobile phone power amplifiers are constantly increasing. The increase of PA transmission power brings higher harmonics and worse spurious indicators. The deterioration of harmonics and spurs will seriously affect the quality of communication. Therefore, the matching circuit at the back end of PA needs to adjust the harmonics and Spurs have a higher rejection capability. [0003] At present, the harmonic suppression capability and low-frequency spurious suppression capability of the existing PA matching ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/38H03H7/01H03F1/30H03F3/189
CPCH03H7/38H03H7/0161H03H7/0115H03F1/30H03F3/189H03H2007/013H03F3/19H03F3/245H03F1/565
Inventor 周佳辉龙华
Owner LANSUS TECH INC
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