A 3-7 GHz Wide-Band Monolithic Image-Rejection Mixer on a Single-Chip


IEICE TRANSACTIONS on Electronics   Vol.E76-C   No.6   pp.955-960
Publication Date: 1993/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions)
MMIC,  mixer,  image-rejection,  phase shifter,  uniplanar,  

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This paper discusses the development of a monolithic image-rejection mixer with very wide-band (about 60% of the center frequency) image rejection characteristics for 16-QAM digital microwave radio communication receivers. The mixer can be commonly used in 4-, 5-, and 6-GHz bands, which reduces the cost. The mixer consists of a wide-band 90splitter, in-phase divider and drain LO injection mixers. They are designed on a single 2.81.8 mm2 GaAs chip based on a uniplanar MMIC lumped-constant element technique. The mixer achieved an image rejection ratio of greater than 25 dB and a conversion loss of less than 2 dB at a wide LO frequency range from 3.5 to 6.5 GHz, without consuming any DC power.