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Concurrent tri-band GaN HEMT power amplifier using resonators in both input and output matching networks

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2 Author(s)
Zhebin Wang ; Electr. Eng., Univ. of Quebec in Rimouski, Rimouski, QC, Canada ; Chan-Wang Park

This paper presents a novel method by using resonators in both input and output matching networks to design a tri-band GaN HEMT power amplifier. Two parallel resonators in series as one frequency selection element are used for each operation frequency. By applying this frequency selection element in both input and output matching networks constructed with microstrip line, tri-band matching network is realized. With our proposed frequency selection element, we can use the conventional L-type structure to design matching network for three frequencies so that the design analysis procedure is easier. We also propose a new simplified output matching network by using bias line to match the output impedance to reduce the number of resonators. To demonstrate our method, we fabricate a tri-band power amplifier that can work at 1 GHz, 1.5 GHz, and 2.5 GHz concurrently. Experimental results show that the output power is 39.8 dBm, 40.8 dBm, and 39.2 dBm with 56.4%, 58.3%, and 43.4% power added efficiency (PAE) at 1 GHz, 1.5 GHz and 2.5 GHz, respectively.

Published in:

Wireless and Microwave Technology Conference (WAMICON), 2012 IEEE 13th Annual

Date of Conference:

15-17 April 2012

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