  In the field of magnonics, which uses magnons, the quanta of spin waves, for
energy-efficient data processing, significant progress has been made leveraging
the capabilities of the inverse design concept. This approach involves defining
a desired functionality and employing a feedback-loop algorithm to optimise the
device design. In this study, we present the first experimental demonstration
of a reconfigurable, lithography-free, and simulation-free inverse-design
device capable of implementing various RF components. The device features a
square array of independent direct current loops that generate a complex
reconfigurable magnetic medium atop a Yttrium-Iron-Garnet (YIG) rectangular
film for data processing in the gigahertz range. Showcasing its versatility,
the device addresses inverse problems using two algorithms to create RF notch
filters and demultiplexers. Additionally, the device holds promise for binary,
reservoir, and neuromorphic computing applications.
