A 270 GHz-Band Planer Type MMIC Image Rejection SIS Mixer

Morishige HIEDA
Tetsuya TAKAMI
Tadashi TAKAGI

IEICE TRANSACTIONS on Electronics   Vol.E86-C    No.8    pp.1458-1463
Publication Date: 2003/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
SIS,  mixer,  image rejection,  

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A 270 GHz-band image rejection SIS mixer is developed. This mixer employs planer type image rejection configuration and is integrated into a single-chip as in MMIC's at microwave frequency. In order to use sapphire substrate at 270 GHz-band, CPW transmission lines are selected to realize 50-70Ω characteristic impedances. The fabricated MMIC SIS mixer performs 12-24 dB image rejection ratio with 450-780 K noise temperature at 270 GHz.