Open AccessTechnique to characterise transient behavioural of multistage RF power amplifier for two‐way radio applications
Author(s) -
Anand Lokesh,
Kumar Narendra,
Kanesan Jeevan
Publication year - 2017
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2016.0372
Subject(s) - transient (computer programming) , amplifier , radio frequency , transient response , rf power amplifier , wideband , power (physics) , electronic engineering , noise (video) , voltage , steady state (chemistry) , electrical engineering , computer science , physics , engineering , chemistry , cmos , quantum mechanics , artificial intelligence , image (mathematics) , operating system
A new technique to characterise the behavioral response of multistage RF power amplifier (PA) is presented. A simplified design methodology of closed loop PA with DC current sensing of multistage PA (cascaded) and voltage shaping algorithm is introduced in this study. An accurate characterisation of transient behavioral which includes ramping of RF energy from noise level to steady state level and adjacent channel transient power (ACTP), shows a high degree of correlation with measurement level for wideband RF PA operation (400–520 MHz). A prototype board is fabricated and measurement results demonstrated good correlation with transient behavioral model simulation. On board measurements demonstrated transient timing response of 1 ms while maintaining good ACTP of less than ‐60 dB over the wide frequency range of 400–520 MHz.