Title :
Minimizing radiated power variation in power amplifier FEMs with directional couplers
Author :
Mu, Xiafang ; Sun, Weimin
Author_Institution :
Skyworks Solutions Inc., Newbury Park, CA, USA
Abstract :
Directional couplers are used in GSM/EDGE and 3G power amplifier front end modules (PA FEMs) for radiated power detection and control. The radiated power varies with load VSWR. There are analyses on the power control mechanism in PA FEMs with directional couplers, and back-of-envelope calculations to estimate power variations in design practice. The objective of the paper is to provide engineering examples illustrating the pros and cons of various methods, and design considerations to compensate non-ideal factors in PA FEMs.
Keywords :
directional couplers; finite element analysis; power amplifiers; 3G power amplifier front end modules; GSM/EDGE; back-of-envelope calculations; directional couplers; power amplifier FEM; radiated power variation; Directional couplers; Power Amplifier; Power Control; Power Detection;
Conference_Titel :
Signals Systems and Electronics (ISSSE), 2010 International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6352-7
DOI :
10.1109/ISSSE.2010.5606953
