Expansion of dynamic band and decrease of insertion losses of devices on basis of magnetostatic waves

Amplitude-frequency characteristics of a device on the basis of magnetostatic waves were experimentally investigated in the frequency band 2 - 8 GHz and at the levels of input signal power 0.06mW-600mW. The undoped YIG film with saturation induction 1750G was applied in the device. The orientation of external magnetic field was at the plane transversal to the direction of propagation of magnetostatic waves. For different frequency bands the existence of optimum angles of magnetic biasing at which losses of the device were minimal was proved. So at input signal power of 600mW, frequency tuning in the band 1.9 GHz - 2.3 GHZ with the angle of magnetic biasing 8° and in the band from 2.35 GHz up to 2.85 GHZ for the angle 12° the insertion losses of the device did not exceed 6.5 Db. It was shown, that achievement of rather small insertion losses at frequencies lower than 3.27 GHz became possible due to providing conditions of wave generation and propagation of nonreciprocal magnetostatic volume.