[分享] A NEW PLANAR DOUBLE-DOUBLE BALANCED MMIC MIXER STRUCTURE

       Coplanar waveguides, slot lines andcombined to realize a MMIC doubtle-double balanced mixer (DDBM) in which all circuitry is on the top side ofthe substrate and no via holes are required. The DDBM exhibits RF, LO, and IF bandwidths of 6-20 GHz, 8-18GHz and 2-7 GHz respectively with conversion loss ranging between 6.2 and 9.8 dB, and RF to IF, LO to IF and LO to RF isolations all greater than 20 dB. The mixer was designed analytically using the harmonic balance method to assess key performance parameters. It is believed to he the first planar diode MMIC DDBM to be reported.