Interference of spin waves in arrays of microwaveguides based on yttrium-iron garnet films

Effects of propagation and interference of spin waves in an eight-port magnonic structure in the form of a 2 $\times$ 2 array of microwaveguides based on yttrium-iron garnet films with microantennas placed at the waveguide ends are studied experimentally and numerically. It is shown that conditions for a constructive and destructive interference of spin waves, which is necessary for creating spin-wave logic devices, can be implemented at output transducers by changing the phase of input signals.