Modeling millimeter-wave IC behavior for flipped-chip mounting schemes

A circuit topology is presented for modeling flipped-chip-mounted monolithic microwave integrated circuits (MMIC's) at microwave frequencies. The proposed topology especially models the loss of isolation due to the flipped-chip structure. Both coplanar and microstrip flipped chips are circuit modeled and their results compared to full numerical simulations and to scale-model measurements. Both measurements and numerical modeling show resonances in the millimeter-wave range.