Title :
Design and Analysis of Stacked Power Amplifier in Series-Input and Series-Output Configuration
Author :
Lei, Ming-Fong ; Tsai, Zuo-Min ; Lin, Kun-You ; Wang, Huei
Author_Institution :
Nat. Taiwan Univ., Taipei
Abstract :
The stacked-device power-combining technique is a proven method to increase the output power and load impedance of a power amplifier (PA) simultaneously. The series-input configuration is physically realizable for multicell stacked device configuration in monolithic circuits. The series-input and series-output stack configuration is rigorously analyzed and proven to increase both the input impedance and output impedance simultaneously, easing the matching circuit designs in high PAs. The effects of asymmetry of the input feed and amplifier cells due to distributed effects and process variation on the performance of the stack amplifier are discussed. A four-cell HBT amplifier operating at 5-6 GHz is demonstrated to validate the circuit concept.
Keywords :
MMIC power amplifiers; bipolar MMIC; heterojunction bipolar transistors; HBT amplifier; frequency 5 GHz to 6 GHz; monolithic circuits; multicell stacked device configuration; series-input configuration; series-output configuration; stacked power amplifier; Circuit synthesis; Distributed amplifiers; Electromagnetic heating; Feeds; Heterojunction bipolar transistors; Impedance; Microwave amplifiers; Power amplifiers; Power generation; Voltage; Monolithic microwave integrated circuit (MMIC) power amplifiers (PAs); stacked amplifier;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2007.909147
