Active matching network with balanced parameters

Name: Teerawat Pantawong

Organization : Mae Fah Luang University

keyword: Power amplifiers

LCSH: Power amplifiers

Classification :.LCCS: TK7871.58.P6

Abstract: Normally, for the design of power amplifiers, the researchers focus only on developing and designing a power amplifier for efficient operation without considering balancing parameters of passive devices between an input and an output of power amplifiers. This design will provide high efficiency and high output power, however, the difference of the passive devices inside the circuit may be the cause of the error of the design. In the common design, the AC circuit is designed from passive devices, active devices, and IC (Integrated Circuit). Parasitic parameters (parasitic effects) which are a major factor of the design error are often found in these circuits. This research demonstrates a design of the balanced parameters of the passive devices using a matching technique. This method shows the reduction of the parasitic effects and the increase in operational efficiency in the circuit. In this study, the Pi and T networks were selected for a matching network. They could also provide the balance in both the input and output circuits, and then the impedances plotted on the Smith Chart. The design of the networks was significant, and the determination of Q in the input and output circuits should be equal. The objective of this research is to design a matching network between inputs and outputs for designing the power amplifier circuits. This study shows the design of the power amplifier with balanced parameters for communication operating at 2.4 GHz frequency. This circuit consists of an input circuit part, an output circuit part, and a bias circuit part (Vgs at -3.8 V, Vdd at 12V). The result of PAE is 41.386 %, S-parameter S11 = -30.354 dBm, S22 = -24.071 dBm. Therefore, the design of the power amplifier with the balanced parameters for communication consumes a power of 12V Vdd. - 3.8 Vds, and the balanced parameters between the input and the output are ten times different.

Mae Fah Luang University. The Learning Resources and Education Media Center

Address: Chiang Rai

Email: library@mfu.ac.th

Name: Roungsan Chaisricharoen

Role: Advisor

Created: 2016

Issued: 2017

Modified: 2020-04-27

Issued: 2017-04-10

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: Thesis TK7871.58.P6 T229a 2016

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Computer Engineering

Grantor: Mae Fah Luang University

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