High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Qureshi, A.R. (TU Delft Electronics; NED University of Engineering and Technology)
Acar, Mustafa (NXP Semiconductors)
Pires, Sergio C. (Ampleon Netherlands)
de Vreede, L.C.N. (TU Delft Electronics)

2018

Packaged integrated low-pass quasi-load insensitive (QLI) class-E matching is proposed for the realization of energy-efficient wideband Doherty and outphasing transmitters. In view of this, a dedicated QLI class-E harmonic matching technique, suitable for in-package integration has been developed, optimized, and evaluated. As proof of concept, very compact, as well as easy to assemble, dual-input load-modulating transmitters have been realized. In this paper, we focus on a QLI class-E matched wideband Doherty that provides 71% peak efficiency (± 3%) at 48-dBm saturated output power and 49% (± 7%) efficiency at 6-dB power backoff, over a 1200-MHz frequency span (1.4-2.6 GHz), yielding 60% fractional bandwidth (BW). When tested with single-carrier long-term evolution (LTE) signals, having a 7-dB peak-to-average ratio, average efficiency remains close to 49% (± 3%) for the entire 60% fractional BW. The realized demonstrator shows excellent linearizability with adjacent channel power ratio and normalized mean square error levels below -50 dBc and -36 dB, respectively, even when operated in simultaneous dual-band LTE operation.

Doherty
dual input
harmonic matching
high efficiency
package integration
quasi-load insensitive (QLI) class-E
wideband

http://resolver.tudelft.nl/uuid:6e56cee4-5026-4ef9-9cb9-46a12592c41c

https://doi.org/10.1109/TMTT.2018.2868876

0018-9480

IEEE Transactions on Microwave Theory and Techniques, PP (99), 1-12

Accepted Author Manuscript

Institutional Repository

journal article

© 2018 A.R. Qureshi, Mustafa Acar, Sergio C. Pires, L.C.N. de Vreede