A novel miniature multilayer MMIC CPW single side band CPW mixer for up conversion at 44.5 GHz |
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Authors: | Hettak K. Morin G.A. Stubbs M.G. |
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Affiliation: | Commun. Res. Centre Canada, Ottawa, Ont., Canada; |
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Abstract: | This letter presents the results of a novel miniature single sideband (SSB) subharmonic direct upconverter GaAs MMIC developed in multilayer coplanar waveguide. The mixer uses 50 MHz I and Q signals to directly modulate the second harmonic of a 22.25 GHz carrier, producing the required 44.55 GHz RF output. Two pairs of antiparallel diodes reduce feedthrough of the fundamental 22.25 GHz signal to the RF output while novel coplanar waveguide/asymmetric coplanar stripline, centre conductor based structures provide matching. This 1.7/spl times/1.7 mm/sup 2/ chip also uses a previously developed, reduced size Wilkinson divider based on asymmetric coplanar stripline and a reduced size three-dimensional 90/spl deg/ coupler. |
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