Title :
Microwave push-pull oower amplifier using metamaterial-based baluns
Author :
Tseng, Chao-Hsiung ; Chang, Chih-Lin
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei
Abstract :
A new push-pull power amplifier using metamaterial (MM)-based baluns is developed in this paper. To effectively suppress the second harmonics from two power amplifiers in the push-pull circuit configuration, two MM-based baluns with a 79% out-of-phase bandwidth and an amplitude imbalance of 0.67 dB are employed as input and output circuitries. At 1.5 GHz, the developed push-pull power amplifier achieves a small-signal gain of 8.1 dB, a peak power-added efficiency (PAE) of 27.1%, and a second-harmonic suppression of 43.2 dB at 1-dB gain compression point.
Keywords :
baluns; interference suppression; metamaterials; microwave power amplifiers; frequency 1.5 GHz; gain 8.1 dB; metamaterial-based baluns; microwave push-pull power amplifier; noise figure 43.2 dB; second-harmonic suppression; Bandwidth; Circuits; FETs; Gain; Impedance matching; Metamaterials; Microwave amplifiers; Power amplifiers; Power generation; Power system harmonics; balun; metamaterial; push-pull amplifier;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958290
