The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 29-688
Full Name: Natasa Males-Ilic
Position: Assistant Professor
Age: ON
Sex: Female
Address: Aleksandra Medvedeva 14
Country: YUGOSLAVIA
Tel: +38118529137
Tel prefix:
Fax: +38118588399
E-mail address: natasa.males.ilic@elfak.ni.ac.rs
Other E-mails: natasam@elfak.ni.ac.yu
Title of the Paper: Harmonic-controlled three-way Doherty amplifier with improved linearity
Authors as they appear in the Paper: Natasa Males-Ilic, Aleksandar Atanaskovic, Bratislav Milovanovic
Email addresses of all the authors: natasa.males.ilic@elfak.ni.ac.rs, aleksandar.atanaskovic@elfak.ni.ac.rs, batam@pogled.net
Number of paper pages: 10
Abstract: In this paper the efficiency and linearity behavior of three-way Doherty amplifier is analyzed. The amplifier is designed in the configuration with two quarter-wave impedance transformers in the output combining circuit with LDMOSFETs in carrier and peaking amplifiers. The signals for linearization (the fundamental signals' second harmonics-IM2 and fourth-order nonlinear signals-IM4 at frequencies that are close to the second harmonics) are extracted at the output of peaking cells biased at various points. The Doherty amplifier is designed with the frequency diplexer at the outputs of the Doherty cells that separates the fundamental signals and signals for linearization. The diplexer includes harmonic control circuit (HCC) which in combination with matching circuits, provides an optimal impedance for an adequate power level of signals for linearization, and either open circuit for the third harmonics (HCC class-3F) or short circuit for the third harmonics (HCC clas!
s-3IF). The linearization technique results in the suppression of the third- and fifth-order intermodulation products of Doherty amplifier.
Keywords: Doherty amplifier, Class-F, Harmonic control circuit (HCC), Linearization, Power-added-efficiency, Second harmonics, Fourth-order nonlinear signals, Third- and fifth-order intermodulation products
EXTENSION of the file: .pdf
Special (Invited) Session: High-Efficient Three-Way Doherty Amplifier with Improved Linearity
Organizer of the Session: 620-400
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