Magnetostatic wave planar YIG devices

Microwave devices utilizing magnetostatic waves (MSW) have been studied for the past few years. Recently, significant advances have been made in the development of dispersive delay lines and tunable delay line or resonator oscillators. The present investigation is concerned with the useful features of magnetostatic waves and their applications to the most promising devices as dispersive delay lines and tunable oscillators. Magnetostatic waves are slow electromagnetic waves which propagate in ferrite materials. According to the bias magnetic field direction, there exist three types of magnetostatic waves, including surface waves (MSSW), forward volume waves (MSFVW), and backward volume waves (MSBVW). Attention is also given to operating frequency and theoretical maximum bandwidth, dispersion characteristics, the temperature coefficient of delay, the saturation power level, propagation loss, transducers, and the bias field.