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A millimeter-wave chip-to-chip transmission link operating at 90 GHz is presented. It uses an insulated image guide and on-chip dipole antennas positioned in the entrance of the waveguide for excitation and reception. The on-chip dipole antenna couples to the higher-order Ex11 mode of a synthesized insulated image waveguide. This field coupling avoids the need for conductive connections such as wire-bonds or flip-chip technology. The measured insertion loss of such a field-coupled dipole-to-image guide transition is 0.46 dB at 90 GHz.