A new type high frequency class E power amplifier

Author

Zhang, Naiqian ; Yam, Yu-On ; Gao, Baoxin ; Cheung, Chi-Wai

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong

Volume

3

fYear

1997

fDate

2-5 Dec 1997

Firstpage

1117

Abstract

At high efficiency, an inductor´s electromagnetic emission will cause power loss and circuit instability. In this paper, a new type of high frequency class E amplifier is introduced with coaxial line components. Short coaxial lines are used as inductors because of their merits over coil and spiral inductors at high frequency. With coaxial lines and a switch, this kind of lumped-distributed circuit is simulated by a newly developed time-domain method. To calculate the power loss in the transistor and the collector efficiency, a time-domain switch resistor model is used whose transient resistance is determined from the I-V characteristics of the transistor

Keywords

UHF power amplifiers; equivalent circuits; inductors; network analysis; network synthesis; switching circuits; time-domain analysis; I-V characteristics; class E power amplifier; coaxial line components; coaxial line inductors; collector efficiency; lumped-distributed circuit simulation; power loss calculation; time-domain method; time-domain switch resistor model; transient resistance; Circuits; Coaxial components; Coils; Electromagnetic induction; Frequency; High power amplifiers; Inductors; Spirals; Switches; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific

Print_ISBN

962-442-117-X

Type

conf

DOI

10.1109/APMC.1997.656421

Filename

656421