The authors present coplanar integrated directional couplers for 90 and 180 GHz with a 60 GHz (120 GHz) bandwidth and up to 20 dB directivity. A three-dimensional (3-D) field simulator has been used to calculate the complex propagation constants and the impedances of the two modes. For the first time, the comparison of simulated and measured S-parameters up to 230 GHz shows the validity of the design approach and the capability of integrated coplanar couplers.
No takes yet. Share an insight, caveat, or question.
Wohlgemuth et al. (1999) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: