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0.4-5.2GHz SiGe-MMIC Direct Conversion Mixer for Cognitive Radio Receiver

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5 Author(s)
Noriharu Suematsu ; Information Technology R&D Center, Mitsubishi Electric Corp., 5-1-1 Ofuna, Kamakura, Kanagawa, 247-8501, Japan. e-mail: ; Koji Tsutsumi ; Jun Koide ; Mikio Uesugi
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0.4-5.2 GHz broad-band SiGe-MMIC direct conversion quadrature mixer (Q-MDC) has been developed for multi-band multi-mode cognitive radio receivers by using 0.35 mum SiGe BiCMOS process. To realize broad-band characteristic, a static frequency divider with two-stage emitter follower is used as 90 degree power divider for LO and broad-band doubly balanced mixers are used as I/Q unit mixers. The 90 degree power divider enable to achieve multi-octave operation for LO which covers whole band of 0.4-5.2 GHz. Broad-band unit mixers also enable to achieves wide RF band (0.4-5.2 GHz) and wide base band (up to 500 MHz). The fabricated Q-MIX performs EVM of less than 3% over the whole RF frequency range of 0.4 -5.2 GHz and shows the dynamic range of more than 40 dB for 0.4 GHz UHF application (16 QAM/OFDM), 0.8 GHz/2 GHz W-CDMA (QPSK) and 5.2 GHz IEEE 802.11a W-LAN (64 QAM/OFDM) receptions

Published in:

2007 IEEE Radio and Wireless Symposium

Date of Conference:

9-11 Jan. 2007