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
CN102111114AActive Publication Date: 2011-06-29SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2011-06-29

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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.
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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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