K-Band Image-Reject and Ka-Band Balanced Mixers Constructed Using Planar Millimeter-Wave Techniques

Abstract
An image-reject mixer for Ka-band (18.0 to 26.5 GHz) and a balanced mixer for K-band (26.5 to 40.0 GHz) have been developed using planar microwave integrated-circuit techniques. These mixers have low-noise performance over the entire waveguide bands and successfully demonstrate the first wideband applications of planar MIC techniques at millimeter wavelengths. Further, they established the feasibility of the MIC approach up to 40 GHz and pave the way for similar developments to 80 GHz and beyond. The designs, fabrication, and performance of the K-band image-reject mixer and the Ka-band balanced mixer are presented and discussed.

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