Title :
New Wide Band Predistortion Linearizer with an Advanced Shape Tuning Capability for Space Applications
Author :
Villemazet, J.-F. ; Perrel, M. ; Brousse, D. ; Maynard, J. ; Cazaux, J.L.
Author_Institution :
Alcatel Alenia Space, Toulouse
Abstract :
This paper proposes a new predistortion linearizer architecture allowing a new advanced shape tuning capability in addition to the classical magnitude control of the gain expansion and phase shift. This new feature is compatible with a wide band operation. A frequency bandwidth of 1.8 GHz has been demonstrated with a Ku-band TWTA between 10.95 and 12.75 GHz. A C/I3 improvement of about 20 dB at -6 dB IBO per carrier and a NPR increase of 7 dB at -6 dB IBO were obtained thanks to this new linearizer circuit with regard to a conventional diode predistortion linearizer.
Keywords :
Schottky diodes; power amplifiers; satellite communication; travelling wave amplifiers; wideband amplifiers; Schottky diodes; advanced shape tuning capability; frequency 1.8 GHz; frequency 10.95 GHz to 12.75 GHz; gain expansion; magnitude control; phase shift; power amplifier; satellite communication; space applications; traveling wave tube amplifiers; wide band predistortion linearizer; Circuits; Linearity; Microwave amplifiers; Power amplifiers; Power generation; Predistortion; Satellites; Schottky diodes; Shape control; Wideband; Amplifier distortion; Schottky diodes; microwave circuit; nonlinear distortion; power amplifiers; predistortion linearizer;
Conference_Titel :
Vacuum Electronics Conference, 2007. IVEC '07. IEEE International
Conference_Location :
Kitakyushu
Print_ISBN :
1-4244-0633-1
DOI :
10.1109/IVELEC.2007.4283383
