0.4-5.8GHz SiGe-MMIC Quadrature Modulator Employing Self Current Controlled Mixer for Cognitive Radio
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概要
- 論文の詳細を見る
A 0.4-5.8GHz SiGe-MMIC quadrature modulator (Q-MOD) employing a self current controlled mixer for cognitive radio is described. The self current controlled mixer consists of a Gilbert cell mixer and a self current control circuit which is composed of both a current feedback circuit and an output buffer amplifier. The self current control circuit automatically controls the mixer current according to the output power level, and improves the linearity over wide radio frequency (RF) range. Simulation results show that the proposed Q-MOD realizes 1dB compression point (P1dB) improvement of more than 3.0dB compared to the conventional Q-MOD at the frequencies of 0.4, 0.8, 1.95, 5.2 and 5.8GHz. The fabricated Q-MOD achieves P1dB improvement of more than 2.8dB under the same condition. It also improves the output power with error vector magnitude (EVM) of 3.0% (Pout@EVM=3.0%), and achieves the Pout improvement of more than 2.7dB under the modulation conditions of UHF wireless system (OFDM/16QAM, 0.4GHz), W-CDMA (HPSK/QPSK, 0.8GHz/1.95GHz) and wireless-LAN (OFDM/64QAM, 5.2GHz/5.8GHz).
- 2009-12-01
著者
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SHINJO Shintaro
Information Technology R&D Center, Mitsubishi Electric Corporation
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SUEMATSU Noriharu
Kamakura Works, Mitsubishi Electric Corporation
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Harada Hiroshi
National Inst. Of Information And Communications Technol. (nict) Kanagawa Jpn
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Suematsu Noriharu
Kamakura Works Mitsubishi Electric Corporation
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Suematsu Noriharu
Information Technology R & D Center Mitsubishi Electric Corporation
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Suematsu Noriharu
Information Technology R Amp D Center Electro-optics Amp Microwave System Laboratory Mitsubishi Elec
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Shimozawa Mitsuhiro
Information Technology R&d Center Mitsubishi Electric Corporation
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Tsutsumi Koji
Information Technology R&d Center Mitsubishi Electric Corporation
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ONOMA Fumiki
Kamakura Works, Mitsubishi Electric Corporation
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Onoma Fumiki
Kamakura Works Mitsubishi Electric Corporation
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Harada Hiroshi
National Insitute Of Information And Communication Technology
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Shinjo Shintaro
Information Technology R&d Center Mitsubishi Electric Corporation
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