Millimeter-Wave Chip-to-Chip Transmission Using an Insulated Image Guide Excited by an On-Chip Dipole Antenna at 90 GHz

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 E
_x
¹¹
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.