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A matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers

A power amplifier and matching circuit technology, applied in the direction of power amplifiers, amplifiers, low-frequency amplifiers, etc., can solve problems affecting communication quality and PA spurs

Active Publication Date: 2020-07-07
LANSUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the increase of PA Gain, it will bring the amplification of clutter signals outside the working frequency band, which will lead to the problem of excessive PA spurs, which will seriously affect the communication quality.

Method used

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  • A matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers
  • A matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers
  • A matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers

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Embodiment Construction

[0023] The specific embodiments of the present invention will be described in more detail below with reference to the drawings and examples, so as to better understand the solution of the present invention and its advantages in various aspects. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention.

[0024] see figure 1 , the embodiment of the present invention provides a matching circuit structure for suppressing low-frequency clutter of a mobile phone power amplifier. Further detailed description will be made below in conjunction with the embodiments and accompanying drawings.

[0025] In the embodiment of the present invention, the design structure of the three-stage power amplifier is adopted, and the output terminal can obtain greater output power and gain. Such as figure 1 As shown, the matching circuit structure includes an input DC blocking capacitor C2, a first stage PA, a...

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Abstract

The invention provides a matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers, belonging to the technical field of radio frequency power amplifiers. The circuit structure of the present invention includes: the input end connected in series to the input end of the output end, a DC blocking capacitor C2, a PA, and an output matching network, and also includes: a negative feedback network connected in parallel to the transmitting end of the PA; the negative feedback network includes: a resonant capacitor C1 , the resonant inductance L1 and the matching inductance L2; the resonant capacitor C1 and the resonant inductance L1 are connected in parallel to form a frequency selection network, and the frequency selection network is connected in series with the matching inductance L2 to ground. The low-frequency clutter of the power amplifier can be effectively suppressed by using the matching circuit structure of the present invention.

Description

technical field [0001] The invention belongs to the technical field of radio frequency power amplifiers, in particular to a matching circuit structure and method for suppressing low-frequency clutter of mobile phone power amplifiers. Background technique [0002] With the continuous development of communication systems, the application of mobile phones is becoming more and more frequent in our lives. RF power amplifier (PA) is an important part of the mobile phone system, mainly used for signal amplification and transmission. The RF power amplifier amplifies the modulated RF signal to a certain power value, and then transmits it through the antenna. In order for the PA to have a high enough transmission power, it is often necessary to make the signal transmission gain (Gain) of the PA high enough to meet the requirements of high power transmission. However, due to the improvement of PA Gain, the clutter signal outside the working frequency band will be amplified, which wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/189H03F3/20H03F3/24
CPCH03F3/189H03F3/20H03F3/24H03F3/181H03F2200/408H03F2200/318H03F1/565H03F3/211H04B1/04H04B2001/0408
Inventor 周佳辉胡滨郭嘉帅宣凯
Owner LANSUS TECH INC