A packaged 86 W GaN transmitter with SiC varactor-based dynamic load modulation
Paper i proceeding, 2013

Output power scaling based on class-J dynamic load modulation (DLM) theory is used to design an unprecedentedly high power microwave transmitter with varactor-based DLM functionality. Matching networks are realized on high dielectric constant substrates in order to reduce the form factor. The fully matched DLM PA incorporates a 24-mm GaN HEMT powerbar and a stack of four SiC varactors, all fit into a CuW package (40 mm × 20 mm). Peak output power is reconfigurable by changing the drain voltage, while retaining the DLMeffect. Under pulsed conditions at 40 V the PA delivers a peak power of 86 W at 2.14 GHz. Efficiency enhancement by DLM is 10-15 percentage-units at 6 dB output power back-off (OPBO). Employing digital predistortion (DPD) with a vector switched generalized memory polynomial (VS-GMP) the ACLR is -46 dBc at an average output power of 17 W and a drain efficiency of 34%. These results prove the potential for high output power levels in varactor-based DLM transmitters.

Gallium nitride

varactors

high efficiency

silicon carbide

power amplifiers

Författare

Christer Andersson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

MUSTAFA ÖZEN

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

David Gustafsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Koji Yamanaka

Mitsubishi Electric Corporation

Eigo Kuwata

Mitsubishi Electric Corporation

Hiroshi Otsuka

Mitsubishi Electric Corporation

Masatoshi Nakayama

Mitsubishi Electric Corporation

Yoshihito Hirano

Mitsubishi Electric Corporation

Iltcho Angelov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Niklas Rorsman

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013, Nuremberg, Germany, 7-10 October 2013

283-286

Ämneskategorier

Elektroteknik och elektronik

ISBN

978-287487031-6

Mer information

Skapat

2017-10-07