Title :
Dynamic AM-AM and AM-PM behavior in microwave PA circuits
Author :
Cabral, Pedro M. ; Pedro, José C. ; Carvalho, Nuno B.
Author_Institution :
Inst. de Telecomunicagoes, Univ. de Aveiro, Portugal
Abstract :
This paper explains the nonlinear dynamic memory effects observed on both AM-AM and AM-PM conversions of nonlinear microwave power amplifier, PA, circuits. The study is introduced via an analytic Volterra series analysis which is then illustrated with envelope simulations gathered from a GaN HEMT based microwave PA. This way, a theoretically supported explanation of the small- and large-signal dynamic asymptotic behavior, observed in the amplitude and phase conversions of microwave/RF PA´s, could be achieved.
Keywords :
HEMT circuits; III-V semiconductors; Volterra series; gallium compounds; microwave power amplifiers; wide band gap semiconductors; AM-AM conversion; AM-PM conversions; GaN; HEMT circuits; Volterra series analysis; amplitude conversions; dynamic asymptotic behavior; large-signal behavior; microwave PA circuits; nonlinear dynamic memory effects; nonlinear microwave power amplifier; phase conversions; small-signal behavior; Analytical models; Circuit simulation; Impedance measurement; Microwave amplifiers; Microwave circuits; Microwave measurements; Nonlinear distortion; Power amplifiers; Testing; Transfer functions;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606809
