A new method to design high efficiency power amplifier using dual-band transformer

This paper presents a novel technique to design harmonic tuned power amplifier. The proposed approach is based on the combination of three-section dual band transformer and dc biasing line. With this compact structure, fundamental impedance matching and harmonic control are achieved simultaneously. This method abandons the use of additional shunt stubs besides the dc biasing line so that the design procedure can be simplified and the size and complexity of the harmonic tuned power amplifier can be reduced. For demonstration, a power amplifier working at 2.14 GHz is designed and fabricated. A maximum drain efficiency of 82% is achieved by measurement.

[1]  S. Gao,et al.  High efficiency class-F RF/microwave power amplifiers , 2006, IEEE Microwave Magazine.

[2]  Quan Xue,et al.  A Class-F Power Amplifier With CMRC , 2011, IEEE Microwave and Wireless Components Letters.

[3]  P. Roblin,et al.  High Efficiency RF Power Amplifier Designed With Harmonic Real-Time Active Load-Pull , 2008, IEEE Microwave and Wireless Components Letters.

[4]  P. Butterworth,et al.  High-efficiency power amplifier design including input harmonic termination , 2006, IEEE Microwave and Wireless Components Letters.

[5]  A. Grebennikov.  Load Network Design Technique for Class F and Inverse Class F PAs , 2011 .

[6]  N. Weste,et al.  A GaN HEMT amplifier with 6-W output power and >85% power-added efficiency [Student Designs] , 2008, IEEE Microwave Magazine.

[7]  Fan Wu,et al.  A Three-Section Dual-Band Transformer for Frequency-Dependent Complex Load Impedance , 2009, IEEE Microwave and Wireless Components Letters.

[8]  P. Colantonio,et al.  A Design Technique for Concurrent Dual-Band Harmonic Tuned Power Amplifier , 2008, IEEE Transactions on Microwave Theory and Techniques.

[9]  Youngoo Yang,et al.  Analysis and experiments for high-efficiency class-F and inverse class-F power amplifiers , 2006, IEEE Transactions on Microwave Theory and Techniques.

[10]  F.M. Ghannouchi,et al.  Study and Design Optimization of Multiharmonic Transmission-Line Load Networks for Class-E and Class-F $K$-Band MMIC Power Amplifiers , 2007, IEEE Transactions on Microwave Theory and Techniques.