Micromagnetic simulation of the spin-wave-based Rowland circle spectrometer. (a) The colormap shows a magnetization snapshot of a YIG film, the peaks on the Rowland circle correspond to frequencies f
1 = 10 GHz and f
2 = 10.25 GHz. The yellow stripe at the bottom is a sketch of the microstrip that is used as a source. (b) Spin-wave amplitude along the Rowland circle indicated by black arc in (a).