| Citation: |
Wu Chia-Song, Lin Tah-Yeong, Wu Hsien-Ming. High linearity 5.2-GHz power amplifier MMIC using CPW structure technology with a linearizer circuit[J]. Journal of Semiconductors, 2010, 31(2): 025002. doi: 10.1088/1674-4926/31/2/025002
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Wu C S, Lin T Y, Wu H M. High linearity 5.2-GHz power amplifier MMIC using CPW structure technology with a linearizer circuit[J]. J. Semicond., 2010, 31(2): 025002. doi: 10.1088/1674-4926/31/2/025002.
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High linearity 5.2-GHz power amplifier MMIC using CPW structure technology with a linearizer circuit
DOI: 10.1088/1674-4926/31/2/025002
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Abstract
A built-in linearizer was applied to improve the linearity in a 5.2-GHz power amplifier microwave monolithic integrated circuit (MMIC), which was undertaken with 0.15-μm AlGaAs/InGaAs D-mode PHEMT technology. The power amplifier (PA) was studied taking into account the linearizer circuit and the coplanar waveguide (CPW) structures. Based on these technologies, the power amplifier, which has a chip size of 1.44 × 1.10 mm2, obtained an output power of 13.3 dBm and a power gain of 14 dB in the saturation region. An input third-order intercept point (IIP3) of –3 dBm, an output third-order intercept point (OIP3) of 21.1 dBm and a power added efficiency (PAE) of 22% were attained, respectively. Finally, the overall power characterization exhibited high gain and high linearity, which illustrates that the power amplifier has a compact circuit size and exhibits favorable RF characteristics. This power circuit demonstrated high RF characterization and could be used for microwave power circuit applications at 5.2 GHz.-
Keywords:
- power amplifier; linearizer; MMIC; CPW
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