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A 280 W LDMOS broadband Doherty PA with 52% of fractional bandwidth based on a multi-line impedance inverter for DVB-T applications

Cidronali, Alessandro; Giovannelli, Niccolò; Maddio, Stefano; Del Chiaro, Andrea; Schuberth, Christian; Magesacher, Thomas LU and Singerl, Peter (2016) In International Journal of Microwave and Wireless Technologies 8(8). p.1141-1153
Abstract

We introduce a new technique for the design of an output combiner for Doherty power amplifier (DPA) and its effective exploitation for the development of a wideband laterally diffused metal oxide semiconductor (LDMOS) DPA. The design is enabled by a two-line impedance inverter for the DPA back-off operation, which is capable of 52% of fractional bandwidth. The technique is validated by the development of a DPA prototype for Ultra high frequency terrestrial digital video broadcast (DVB-T) applications, with optimized peak power and efficiency over 470–806 MHz. The prototype delivers between 40 and 53% of average efficiency across the band, at 49 dBm output power in average across the bandwidth, and supporting DVB-T signals with 8 MHz... (More)

We introduce a new technique for the design of an output combiner for Doherty power amplifier (DPA) and its effective exploitation for the development of a wideband laterally diffused metal oxide semiconductor (LDMOS) DPA. The design is enabled by a two-line impedance inverter for the DPA back-off operation, which is capable of 52% of fractional bandwidth. The technique is validated by the development of a DPA prototype for Ultra high frequency terrestrial digital video broadcast (DVB-T) applications, with optimized peak power and efficiency over 470–806 MHz. The prototype delivers between 40 and 53% of average efficiency across the band, at 49 dBm output power in average across the bandwidth, and supporting DVB-T signals with 8 MHz bandwidth and a peak-to-average power ratio of 10.5 dB. It achieves the target adjacent channel power ratio of −52 dBc at 750 MHz if digital pre-distortion is applied, and provides 47.8 dBm of output power with a drain efficiency of 44.3%.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Broadband PA, Doherty power amplifier, DVB-T, LDMOS
in
International Journal of Microwave and Wireless Technologies
volume
8
issue
8
pages
1141 - 1153
external identifiers
  • scopus:84963997671
  • wos:000393853800003
ISSN
1759-0787
DOI
10.1017/S1759078716000428
language
English
LU publication?
yes
id
cdf67b71-10ee-4911-817c-73b9ef70a476
date added to LUP
2016-10-03 14:47:19
date last changed
2017-09-18 11:30:30
@article{cdf67b71-10ee-4911-817c-73b9ef70a476,
  abstract     = {<p>We introduce a new technique for the design of an output combiner for Doherty power amplifier (DPA) and its effective exploitation for the development of a wideband laterally diffused metal oxide semiconductor (LDMOS) DPA. The design is enabled by a two-line impedance inverter for the DPA back-off operation, which is capable of 52% of fractional bandwidth. The technique is validated by the development of a DPA prototype for Ultra high frequency terrestrial digital video broadcast (DVB-T) applications, with optimized peak power and efficiency over 470–806 MHz. The prototype delivers between 40 and 53% of average efficiency across the band, at 49 dBm output power in average across the bandwidth, and supporting DVB-T signals with 8 MHz bandwidth and a peak-to-average power ratio of 10.5 dB. It achieves the target adjacent channel power ratio of −52 dBc at 750 MHz if digital pre-distortion is applied, and provides 47.8 dBm of output power with a drain efficiency of 44.3%.</p>},
  author       = {Cidronali, Alessandro and Giovannelli, Niccolò and Maddio, Stefano and Del Chiaro, Andrea and Schuberth, Christian and Magesacher, Thomas and Singerl, Peter},
  issn         = {1759-0787},
  keyword      = {Broadband PA,Doherty power amplifier,DVB-T,LDMOS},
  language     = {eng},
  number       = {8},
  pages        = {1141--1153},
  series       = {International Journal of Microwave and Wireless Technologies},
  title        = {A 280 W LDMOS broadband Doherty PA with 52% of fractional bandwidth based on a multi-line impedance inverter for DVB-T applications},
  url          = {http://dx.doi.org/10.1017/S1759078716000428},
  volume       = {8},
  year         = {2016},
}