High efficiency RF pulse width modulation with tunable load network class-E PA
Paper i proceeding, 2011

In this paper, a 10 W peak power 2 GHz highly efficient RF pulse width modulation (RF-PWM) based transmitter is presented. RF-PWM signals are generated with a dedicated 65 nm CMOS modulator and subsequently amplified with a GaN Class-E power amplifier (PA). The modulator use extended drain MOS (EDMOS) high voltage transistors to provide the required voltage swing to drive the GaN used as a switch. The imaginary load impedance of the Class-E is electronically tunable and is implemented with in-house high breakdown voltage SiC varactors. The tunable imaginary load impedance enables optimization of the Class-E versus the duty cycle (pulse width). The peak efficiency is therefore preserved over a wide range of output power levels. The measured drain efficiency of the Class-E output stage is above 70% over a 6.5 dB output power dynamic range. The overall transmitter efficiency is above 60% for the same dynamic range.

high efficiency

Class-E

power amplifiers

EDMOS

SiC varactors

RF-PWM

pulse width modulation

Författare

MUSTAFA ÖZEN

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

GigaHertz Centrum

Christer Andersson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Mattias Thorsell

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

GigaHertz Centrum

Kristoffer Andersson

GigaHertz Centrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Niklas Rorsman

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

GigaHertz Centrum

M. Acar

NXP Semiconductors

M. P. Van Der Heijden

NXP Semiconductors

R. Jos

NXP Semiconductors

2011 IEEE 12th Annual Wireless and Microwave Technology Conference, WAMICON 2011

5872869

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/WAMICON.2011.5872869

ISBN

978-161284081-9

Mer information

Skapat

2017-10-07