Single 1.5V Operation Power Amplifier MMIC with SrTiO_3 Capacitors for 2.4GHz Wireless Applications(Special Issue on Microwave and Millimeter-Wave Module Technology)

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This paper describes design approach and power performance of a single 1.5V operation two-stage power amplifier MMIC for 2.4GHz wireless local area network applications. The MMIC with 0.76×0.96mm^2 area includes SrTiO_3(STO)capacitors with a high capacitance density of 8.0fF/μm^2 and double-doped AlGaAs/InGaAs/AlGaAs heterojunction FETs with a shallow threshold voltage of-0.24V. Utilizing a series STO capacitor and a shunt inductor as an output matching circuit, the total chip size was reduced by 40% as compared with an MMIC utilizing SiN_x capacitors. Under single 1.5V operation, the developed MMIC delivered an output power of 110mW(20.4dBm)and a power-added efficiency(PAE)of 36.7% with an associated gain of 20.0dB at 2.4GHz. Even operated at a drain bias voltage of 0.8V, the MMIC exhibited a high PAE of 31.0%.
社団法人電子情報通信学会の論文
1998-06-25