Nanowire-Based 3-D Transmission-Line Transformer for Millimeter-Wave Applications

Abstract

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Millimeter-wave Wireless Integrated Systems: what to expect for future solutions

“…3D structures were further designed due to the availability of high-performance small nanowire-vias in this interposer, such as crossovers up to 110 GHz [24] with maximum insertion loss of 1.5 dB (not de-embedded), imbalance of 0.2 dB, phase imbalance of 3.3°, and isolation of 30 dB (Fig. 4); 3D inductors [25] with SFR of 91 GHz, quality factor of 35 @40 GHz and values up to 17 nH and 3D transformers [26] (Fig. 5) with different impedance ratios and even structures based on substrate integrated waveguide technology which presented state-of-the-art results.…”