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High-order harmonic suppression circuit for radio frequency power amplifier

A high-order harmonic suppression and radio frequency power technology, applied in power amplifiers, high frequency amplifiers, improved amplifiers to improve efficiency, etc., can solve the problems of increasing circuit complexity and affecting the performance of radio frequency power amplifiers, so as to improve linearity, easy-to-achieve effects

Inactive Publication Date: 2015-04-08
TIANJIN UNIV
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Problems solved by technology

However, these technologies only suppress the second or third harmonics, and there are great limitations in the suppression of high-order harmonics. In addition, in order to realize the suppression of high-order harmonics in these structures, it is necessary to further expand the harmonic suppression circuit. Therefore, the complexity of the circuit is increased, which in turn affects the performance of the RF power amplifier

Method used

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  • High-order harmonic suppression circuit for radio frequency power amplifier
  • High-order harmonic suppression circuit for radio frequency power amplifier
  • High-order harmonic suppression circuit for radio frequency power amplifier

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Embodiment Construction

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments and the prior art. Obviously, the accompanying drawings described below are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

[0026] Such as figure 1 As shown, a high-order harmonic suppression circuit of a radio frequency power amplifier of the present invention includes a transistor, a high-order harmonic suppression circuit and an output matching circuit, and the high-order harmonic suppression circuit is located between the transistor and the output matching circuit; The output matching circuit is located between the high-order harmonic suppression circuit and the load, and the output matching circuit includes a fun...

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Abstract

The invention discloses a high-order harmonic suppression circuit for a radio frequency power amplifier. The circuit comprises a transistor, a high-order harmonic suppression circuit, a fundamental wave matching circuit and a direct current bias circuit, wherein the high-order harmonic suppression circuit is positioned between the transistor and the fundamental wave matching circuit; the fundamental wave matching circuit and the direct current bias circuit are positioned between the high-order harmonic suppression circuit and a load. The high-order harmonic suppression circuit is implemented by a low-pass filter or a band-pass filter, the fundamental wave frequency of the radio frequency power amplifier is within the pass band of the low-pass filter or the band-pass filter, and all harmonic frequency components are within the stop band of the filter; meanwhile, low insertion loss exists in the low-pass filter or the band-pass filter, and high insertion loss exists in the stop band. According to the high-order harmonic suppression circuit, a high-order harmonic suppression function of the power amplifier is enhanced, and the linearity, efficiency and output power of the power amplifier can be improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication power amplifiers, in particular to a high-order harmonic suppression circuit for radio frequency power amplifiers. Background technique [0002] At present, as people's requirements for wireless communication services continue to increase, the demand for high-performance radio frequency transceivers has always been a research hotspot in the field of radio frequency microwaves. The RF Power Amplifier is one of the most critical modules in a wireless transceiver and also the most power consuming. When the input signal increases to a certain extent, the radio frequency power amplifier produces a series of harmonic components due to its operation in the nonlinear region, which greatly affects the performance of the power tube amplifier. Output power, efficiency, and linearity are the most critical performance indicators of power amplifiers. Therefore, how to improve these indicators i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F3/20H03F3/189
Inventor 马建国成千福朱守奎
Owner TIANJIN UNIV
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