Title :
Envelope Modulator Selection for RF Carrier Phase-Burst Transmitters
Author :
Pires, Sergio C. ; Cabral, Pedro M. ; Pedro, Jose C.
Author_Institution :
DETI, Univ. de Aveiro, Aveiro, Portugal
Abstract :
This letter analyzes the performance of RF carrier phase-burst transmitters, implemented with a single-ended switched-mode power amplifier. Using a practical prototype and its corresponding theoretical operation model, the efficiency and linearity was measured and discussed for different envelope modulators. This theoretical analysis and its experimental validation led to the conclusion that optimized efficiency and linearity are obtained when envelope modulators of lower switching frequencies are used.
Keywords :
modulators; optimisation; power amplifiers; radio transmitters; RF carrier phase-burst transmitter; SMPA; efficiency measurement; efficiency optimization; envelope modulator selection; linearity measurement; linearity optimization; switched mode power amplifier; Band-pass filters; Linearity; Phase modulation; Radio frequency; Transistors; Transmitters; Carrier-burst transmitter; phase modulation; power amplifier (PA); pulse-width modulator (PWM); sigma-delta modulator; switched-mode power amplifier (SMPA);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2014.2330499
