**1. Introduction**

The increasing importance of microwave components and antenna reconfigurability stems from the fact that such functionality can significantly improve the performance of various radio systems while promoting sustainability. Indeed, it allows maximizing hardware re-use, thereby reducing the size and component count while avoiding crosstalk and noise issues that arise in multi-band/wideband systems. While a considerable effort has been dedicated to MEMS- and semiconductor-based reconfigurability, fluidics have emerged as a viable alternative for the same purpose owing to their relative abundance, suitability for flexible electronics, and power handling capabilities. However, they may not be as performing in terms of speed and high-frequency coverage.
