Dual-gate E/E and E/D-mode AlGaAs/InGaAs pHEMT for microwave power applications(Session 5 Compound Semiconductor Devices II,AWAD2006)
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概要
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In this study, we demonstrated a dual-gate enhancement/enhancement E/E-mode and enhancement/depletion (E/D) mode AlGaAs/InGaAs pHEMTs technology for high voltage and high power amplifier application. The dual-gate devices shows the higher breakdown voltage (V_<br>) and maximum oscillator frequency (f_<max>) due to two depletion regions can also share total electrical field in the device so that the higher output resistance (R_<ds>) and lower gate-to-drain capacitance (C_<gd>) can be obtain. Therefore, the dual-gate device can be operated at higher drain-to-source voltage (V_<ds>) to obtain excellent linear gain and output power performance as compared with conventional single-gate E-mode device. The maximum oscillation frequency increases from 78 GHz to 123 GHz under V_<ds>=4V biasing for single gate the E-mode and dual-gate E/E-mode device and the rf maximum output power increases from 636mW/mm to 810mW/mm under a 2.4 GHz operation for single gate the E-mode and dual-gate E/D-mode device, respectively. And, we also demonstrated a 2.4 GHz ultra-high gain and high power density two-stage power amplifier using dual gate E/E and E/D-mode transistors, where the E/E-mode pHEMTs for gain-stage, and E/D-mode pHEMTs for power-stage, respectively. The linear gain of 40 dB and maximum output power of 24 dBm were obtained at V_<ds>=4V I_<ds>=30mA 0.5-um (gate length) x 2 (fingers) x 75-um (gate width), and V_<ds>=9V I_<ds>=100mA for 0.5x 8x 75-um^2 E/D-mode pHEMTs respectively.
- 社団法人電子情報通信学会の論文
- 2006-06-26
著者
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Chan Y.
Department Of Anaesthesia Faculty Of Medicine University Of Malaya
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Wu J.
Department Of Electrical Engineering National Central University
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Lin D.
Department of Electrical Engineering, National Central University
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Lin C.
WIN Semiconductor Corp
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Wang W.
WIN Semiconductor Corp
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Huang F.
Department of Electrical Engineering, National Central University
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Wang Y.
WIN Semiconductor Corp
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Lin D.
Department Of Electrical Engineering National Central University
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Chan Y.
Department Of Electrical Engineering National Central University
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Wu J.
Department Of Chemical Engineering Biomedical Engineering And Microbiology & Immunology Universi
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Huang F.
Department Of Electrical Engineering National Central University
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