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International audience; This paper introduces an experimental characterization of substrate integrated waveguide (SIW) components integrated in a benzocyclobutene-based interposer for WR10-band applications. High performance SIWs were experimentally validated, with a measured attenuation constant of 0.39 dB/mm and a quality factor of 27 at 90 GHz. The attenuation constant remains equal to 0.4 dB/mm between 85 GHz and 110 GHz and the quality factor reaches 40 in the upper end of the band. These results show the benefits offered by using benzocyclobutene 3D packaging for the realization of high performance passive circuits with lower cost and higher electrical performance as compared to standard CMOS technologies and concurrent packaging technologies.

A 60-GHz innovative quadrature branch-line coupler is proposed in this letter. The device was implemented in a 22-nm CMOS process, from global foundries. The proposed design merges two miniaturization techniques. On the one hand, slow-wave microstrip (SW-MS) lines based on bed of nails are demonstrated in CMOS technology for the first time. On the other hand, the two quarter-wavelength MS line sections required for the branch-line coupler implementation are realized using the SW-MS transmission line configurations with different form factors. As a result, the achieved miniaturization versus electrical performance is very good as compared to the state-of-the-art. Design insights addressing the coupler dimensions and losses are discussed. The experimental assessment shows an adequate frequency response with amplitude and phase imbalance of 0.8 dB and 1.8° at 60 GHz, respectively. The measured insertion loss is 2.35 dB at 60 GHz and the return loss is better than 15 dB at any port (from 54 to 66 GHz). The isolation is better than 15 dB (from 51 to 68 GHz). The overall size of the coupler is 0.3 mm $\times $ 0.22 mm, which is equivalent to $0.06 \cdot \lambda _{0} \times 0.044 \cdot {\lambda }_{0}$ , at 60 GHz.

International audience; The design of high-complexity electromagnetic (EM) systems is addressed through the System-by-Design (SbD) methodology. The proposed SbD approach relies on the integration and interconnection of suitable functional blocks for solving the design problem at hand in an effective and computationally-efficient way. Towards this end, a fast surrogate model is exploited to remarkably reduce the overall time cost of the synthesis procedure, guaranteeing an optimal trade-off between accuracy and time saving. An illustrative example is shown to assess the suitability of the SbD for the fast synthesis of a hat-fed parabolic reflector for satellite communications.