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Design method for reverse class-F power amplifier based on 3/4 spiral virtual ground structure

A technology of a power amplifier and a design method, which is applied in the directions of power amplifiers, improved amplifiers to improve efficiency, etc., can solve the problems of small area, low cost and high work efficiency of inverse class F power amplifiers, and achieves improvement of work efficiency and output power, saving Plate making costs and the effect of improving work efficiency

Active Publication Date: 2011-06-29
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method uses the unique filtering characteristics of the microstrip line inserted into the 3 / 4 spiral virtual ground structure to design the harmonic control circuit. This harmonic control circuit solves the problem of low Q value and low operating frequency of the traditional lumped component harmonic control circuit. disadvantages, and avoid the disadvantages of large area and complex design of the traditional microstrip harmonic control circuit. The inverse class F power amplifier designed with this harmonic control circuit has the advantages of small area, high work efficiency, low cost and simple design.

Method used

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  • Design method for reverse class-F power amplifier based on 3/4 spiral virtual ground structure
  • Design method for reverse class-F power amplifier based on 3/4 spiral virtual ground structure
  • Design method for reverse class-F power amplifier based on 3/4 spiral virtual ground structure

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing description, the scheme of the present invention is described in detail, and concrete steps are as follows:

[0036] refer to figure 1 , 3, an inverse class F power amplifier based on a 3 / 4 spiral virtual ground structure, including an input matching circuit, a power amplifier circuit, a harmonic control circuit and an output matching circuit sequentially connected on a microstrip line. The harmonic control circuit includes a 3 / 4 spiral virtual ground structure located below the microstrip line, the virtual ground structure is formed by cutting 1 / 4 of the complete spiral virtual ground structure; the 3 / 4 spiral virtual ground structure comprising a two-part helical structure that is symmetrical and connected along the microstrip line axis,

[0037] Part of the spiral structure is that a ground wire is divided into eight segments a~h connected accordingly, all of which are parallel to the microstrip line, and the width of t...

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Abstract

A design method for a reverse class-F power amplifier based on 3 / 4 spiral virtual ground structure comprises the steps as follows: confirming the work frequency of the power amplifier and obtaining the harmonic frequency of a harmonic control circuit; changing the dimension of the 3 / 4 spiral structure and designing corresponding harmonic control circuit according to the needed harmonic frequency in the design; inserting the harmonic control circuit into the output end of a power amplifier tube and designing the input-output matching circuit of a power amplifier circuit; and designing the input-output parameters of the power amplifier through measurement, and adjusting the length of a magic line to reach the maximum work efficiency. The amplifier designed by adopting the method comprises an input matching circuit, a power amplifier circuit, a harmonic control circuit and an output matching circuit which are connected onto a microstrip line in sequence; the harmonic control circuit comprises a 3 / 4 spiral virtual ground structure arranged below the microstrip line, and the virtual ground structure is formed by a complete spiral virtual ground structure cut by 1 / 4; and the 3 / 4 spiral virtual ground structure comprises two spiral structure parts connected with each other and in axial symmetry along the microstrip line.

Description

technical field [0001] The invention is a method for designing an inverse class-F power amplifier, in particular to a design of a high-efficiency inverse-class-F power amplifier based on a 3 / 4 Spiral Defected Ground Structure. Background technique [0002] The rapid development of wireless communication technology has put forward higher requirements for the performance indicators of the communication system. As an important part of the wireless communication transmission system, the power amplifier is also the most difficult and expensive part to realize. Indicators such as data transmission rate, coverage, spectrum utilization, and out-of-band spectrum spurs have a great impact. [0003] With the application of modern wireless communication networks (WCDMA, WLAN, WiMAX, etc.), high-speed wireless data transmission increases the peak-to-average ratio of the signal, which requires that the power amplifier must fall back to the linear region to achieve the purpose of improving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03F1/02
Inventor 周健义晋石磊洪伟
Owner SOUTHEAST UNIV
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