共 21 条
Microwave Characteristics of an Independently Biased 3-Stack InGaP/GaAs HBT Configuration
被引:8
作者:
Manh Duy Luong
[1
]
Ishikawa, Ryo
[2
]
Takayama, Yoichiro
[2
]
Honjo, Kazuhiko
[2
]
机构:
[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka, Japan
[2] Univ Electron Commun, Dept Commun Engn & Informat, Chofu, Tokyo, Japan
关键词:
HBT;
independently biased;
InGaP/GaAs;
microwave;
MMIC;
power amplifier;
POWER-AMPLIFIER;
DESIGN;
D O I:
10.1109/TCSI.2016.2637406
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
This paper investigates various important microwave characteristics of an independently biased 3-stack InGaP/GaAs heterojunction bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) chip at both small-signal and large-signal operation. By taking the advantage of the independently biased functionality, bias condition for individual transistor can be adjusted flexibly, resulting in the ability of independent control for both small-signal and large-signal performances. It was found that at small-signal operation stability and isolation characteristics of the proposed configuration can be significantly improved by controlling bias condition of the second-stage and the third-stage transistors while at large-signal operation its linearity and power gain can be improved through controlling the bias condition of the first-stage and the third-stage transistors. To demonstrate the benefits of using such an independently biased configuration, a measured optimum large-signal performance at an operation frequency of 1.6 GHz under an optimum bias condition for the high gain, low distortion were obtained as: PAE = 23.5 %, P-out = 12 dBm; Gain = 32.6 dB at IMD3 = -35 dBc. Moreover, to demonstrate the superior advantage of the proposed configuration, its small-signal and large-signal performance were also compared to that of a single stage common-emitter, a conventional 2-stack, an independently biased 2-stack and a conventional 3-stack configuration. The compared results showed that the independently biased 3-stack is the best candidate among the configurations for various wireless communications applications.
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页码:1140 / 1151
页数:12
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