Magnetostatic forward volume wave propagation in YIG strips

Theory and measurements on magnetostatic forward volume wave (MFVW) propagation in YIG strips are described. Calculated cut-off frequencies and variation of delay with frequency for the MFVW width modes are in good agreement with measurements. An expression for the radiation resistance for MFVW transduction in YIG samples of finite width is derived which exhibits a pole at the low frequency cut-off of the mode. Results show that width modes are an important source of amplitude and delay ripple in MFVW delay lines.