Modeling Nonlinear Memory Effects on the AM/AM, AM/PM and Two-Tone IMD in Microwave PA Circuits
نویسندگان
چکیده
This article deals with the nonlinear memory effects observed on both AM/AM and AM/PM conversions and swept frequency-separation two-tone intermodulation-distortion (IMD) tests made on microwave power-amplifier (PA) circuits. This study is theoretically introduced via an analytic Volterra series analysis, then complemented with large-signal harmonic balance and envelope simulations of a GaN HEMT-based microwave PA built with different load terminations. © 2005 Wiley Periodicals, Inc. Int J RF and Microwave CAE 16: 13–23,
منابع مشابه
Power Amplifier Behavioral Modeling Strategies Using Neural Network and Memory Polynomial Models
This paper discusses the performance comparison of an artificial neural network (ANN) model and a memory polynomial (MP) model for modeling the dynamic nonlinear input-output characteristics of power amplifier (PA) with memory. The ANN model was based on time delay neural network (TDNN) and the memory polynomial model was developed using analytical polynomial function. Both models were develope...
متن کاملTechniques for Predicting Nonlinear Distortion Effects in Ka-band Uplink Gateways
Abstract In order to achieve optimum service availability, Ka-band gateways must deliver very large effective isotropic radiated power (EIRP) per signal. For most signal types, and for all multicarrier uplinks, uplink power is limited by distortion in the final amplifier. Such distortion may be defined by a number of metrics, including adjacent-channel power ratio (ACPR), noise power ratio (NPR...
متن کاملA Novel Calibrated Time Domain Envelope Measurement Setup for the NPR Characterization and the Behavioral Modeling of Power Amplifiers
Characterization of the nonlinear microwave power devices has been considerably enhanced during the last decades. CW stimuli enable to provide valuable and very useful information for the validation of transistor nonlinear models for CAD. They provide also experimental confirmations of the optimum operating conditions of active cells in terms of power, gain and efficiency [1] [2] [3]. Additive ...
متن کاملPredicting Spectral Regrowth Of an OFDM Signal Through A Power Amplifier Behavioural Model With Memory Effects
Behaviour models for power amplifiers (PA) have traditionally been developed based on conventional AM-AM and AM-PM curves from one-tone measurements, which discounts the presence of memory in the system. Multi-stage high power amplifiers require a more accurate behavioural model to provide a better description of memory effects and highly nonlinear characteristics than the memoryless models bas...
متن کاملComparison of two different methods of colon cleansing for afternoon-colonoscopy
Background: The appropriate colon cleansing is a major determinant of quality of colonoscopy. The aim of this study was to compare the efficacy and tolerability of the morning (AM) PEG (polyethylene glycol) solution to previous-evening (PM) PEG solution for the afternoon colonoscopy. Methods: This comparative study compared the AM to PM prep for afternoon outpatient colonoscopy. The subjects r...
متن کامل