Direct Efficiency and Power Calculation Method and Its Application to Low Voltage High Efflciency Power Amplifier
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概要
- 論文の詳細を見る
A direct calculation method of efficiency and power of FETs from d.c. characteristics determined by knee and breakdown voltages is proposed to make clear the requirements for knee and breakdown voltages of FETs under low-voltage operation of power amplifiers. It is shown from the calculation that the breakdown voltage has a greater effect on power and efficiency than the knee voltage and has to be three or more times of the operating voltage in order not to degrade efficiency under class-AB operation. A 3.3 V UHF-band 3-stage high efficiency and high power monolithic amplifier has been developed with the use of power FETs satisfying the requirements for knee and breakdown voltages under low-voltage operation. A power-added efficiency of 57.3% and a saturated output power of 31.8 dBm have been achieved for a drain voltage of 3.3 V in UHF-band. The direct calculation method of efficiency and power from d.c. characteristics, which can provide the required knee or breakdown voltage for a given efficiency, power, or bias conditions, is considered to be useful for developing power devices with various requirements for efficiency, power, and bias conditions.
- 社団法人電子情報通信学会の論文
- 1995-09-25
著者
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Mori K
Information Technology R&d Center Mitsubishi Electric Corporation
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Takagi T
Optical Interconnection Sumiden Laboratory Rwcp
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Mori Kazutomi
Information Technology R&d Center Mitsubishi Electric Corporation
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Mori Kensaku
Faculty of Engineering, Nagoya University Graduate School
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Itoh Yasushi
Electro-Optics amp Microwave Systems Laboratory, Mitsubishi Electric Corporation
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Mitsui Yasuo
Electro-Optics amp Microwave Systems Laboratory, Mitsubishi Electric Corporation
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Takagi T
Research Institute Of Electrical Communication Tohoku University
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Mitsui Y
Mitsubishi Electric Corp. Itami‐shi Jpn
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Itoh Y
Shonan Inst. Of Technol. Fujisawa‐shi Jpn
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Nakayama M
Information Technology R & D Center Mitsubishi Electric Corporation
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Nakayama M
Laboratory Of Nutrition Chemistry Division Of Bioresource And Bioenvironmental Sciences Graduate Sch
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Mori Kazutomi
Electro-Optics amp Microwave Systems Laboratory, Mitsubishi Electric Corporation
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Nakayama Masatoshi
Electro-Optics amp Microwave Systems Laboratory, Mitsubishi Electric Corporation
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Murakami Satoshi
Communication Equipment Works, Mitsubishi Electric Corporation
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Nakajima Yasuharu
Optoelectronic and Microwave Devices Laboratory, Mitsubishi Electric Corporation
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Takagi Tadashi
Communication Equipment Works, Mitsubishi Electric Corporation
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Itoh Yasushi
Electo-optics And Microwave Systems Laboratory Mitsubishi Electric Corporation
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Nakajima Y
Mitsubishi Electric Corp. Itami‐shi Jpn
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Murakami S
Mitsubishi Electric Corp. Itami‐shi Jpn
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Nakayama Masatoshi
Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
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