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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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author
; ; ; ; ; and
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
publisher
Cambridge University Press
external identifiers
  • wos:000393853800003
  • scopus:84963997671
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
2025-10-14 10:12:32
@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}},
  keywords     = {{Broadband PA; Doherty power amplifier; DVB-T; LDMOS}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{1141--1153}},
  publisher    = {{Cambridge University Press}},
  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}},
  doi          = {{10.1017/S1759078716000428}},
  volume       = {{8}},
  year         = {{2016}},
}