Design of Highly Efficient Load Modulation Transmitter for Wideband Cellular Applications
Artikel i vetenskaplig tidskrift, 2010

In this paper, the high potential of varactor-based dynamic load modulation (DLM) techniques for wideband cellular applications is demonstrated. A systematic design procedure is proposed to ensure high-efficiency wideband performance. It incorporates harmonically tuned power amplifier (PA) concepts and tunable matching techniques in an integrated design. A DLM transmitter at 2.65 GHz with a peak output power of 6 W is designed using the proposed procedure. In order to investigate the wideband performance of the implemented demonstrator, WCDMA signals with scaled bandwidths are employed. The signal peak-to-average ratio is 7 dB and the same for all the experiments. For the 38.4-MHz signal, which has a corresponding channel bandwidth of > 40 MHz, an average power added-efficiency (PAE) of 44%, normalized mean square error (NMSE) of -35 dB, and adjacent channel leakage ratio (ACLR) of -43 dBc are measured.

load modulation

Digital predistortion (DPD)

efficiency

LTE

power amplifier (PA)

4G

linearization

GaN HEMT

LDMOS FET

Författare

Hossein Mashad Nemati

GigaHertz Centrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Haiying Cao

GigaHertz Centrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

B. Almgren

Ericsson Sweden

Christian Fager

GigaHertz Centrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Thomas Eriksson

GigaHertz Centrum

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 58 11 2820-2828

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/TMTT.2010.2077914

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Skapat

2017-10-07