A 2 GHz-Band Even Harmonic Type SiGe-MMIC Direct Conversion CECCTP Mixer

Eiji TANIGUCHI  Kenichi MAEDA  Chiemi SAWAUMI  Noriharu SUEMATSU  

IEICE TRANSACTIONS on Electronics   Vol.E85-C    No.7    pp.1412-1418
Publication Date: 2002/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Silicon RF Device & Integrated Circuit Technologies)
microwave,  mixer,  heterojunction bipolar transistor (HBT),  SiGe,  

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A novel common emitter common collector transistor pair (CECCTP) mixer is presented. A LO pumped CECCTP enables even harmonic mixing operation, and a balanced CECCTP mixer configuration enables the suppression of both 2fLO and fIM2 which are undesirable component for direct conversion mixer. A 2 GHz-band balanced CECCTP mixer is fabricated in SiGe HBT process, and the direct conversion characteristics are measured. It performs conversion gain of 8.8 dB, NF of 14.9 dB and IIP2 of 42.3 dBm when LO power is -6 dBm, supplied voltage is 3 V and current is 5 mA.